Backend Software Engineer specializing in Rust

About N1:N1 stands at the forefront of technology as the pioneering hyper-efficient and horizontally scalable blockchain network, crafted to facilitate trustless computing on a global scale.Our elite team brings together expertise from prestigious institutions including Harvard, Carnegie Mellon University, DFINITY, VMWare, and Galaxy Digital, and is supported by renowned investors such as Founders Fund, Kraken Ventures, and Amber Group.Position Overview:In this pivotal role within our software engineering team, you will lead the design and development of the critical backend systems for our blockchain network. Your focus will be on enhancing networking, reliability, and scalability. You will leverage your deep expertise in Rust to create, test, debug, and deploy robust production-grade software components. Additionally, you will uphold and advance best practices in software engineering within a significant open-source initiative.

About N1:N1 is a pioneering hyper-performance blockchain network, crafted to facilitate trustless computing at an internet scale. Our team is comprised of talented individuals from prestigious backgrounds including Harvard, CMU, DFINITY, VMWare, and Galaxy Digital, and we are proudly supported by renowned investors such as Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:We are on the lookout for a passionate Software Engineer Intern specializing in backend systems using Rust. In this role, you will play a vital part in developing essential backend components for our blockchain network, concentrating on the aspects of networking, reliability, and scalability. Your primary responsibilities will include designing and coding critical backend software components mainly in Rust. You will also be tasked with upholding and improving best practices in software engineering within a leading open-source project.

About N1:N1 is pioneering a groundbreaking hyper-performant and horizontally scalable blockchain network aimed at facilitating trustless computing on an internet scale.Our diverse team comprises exceptional talents from prestigious institutions such as Harvard, Carnegie Mellon University, DFINITY, VMware, and Galaxy Digital, supported by renowned investors including Founders Fund, Kraken Ventures, SALT, and Amber Group.Position Overview:As an integral member of our software engineering team, you will lead the design and development of critical backend components for our blockchain infrastructure, emphasizing networking, reliability, and scalability. Your main responsibilities will include architecting and coding foundational backend software in Rust, utilizing your extensive expertise to ensure the development, testing, debugging, and deployment of high-quality, production-grade components. You will also play a vital role in upholding and advancing superior software engineering practices within a prominent open-source project.

Join N1:At N1, we are pioneering the first hyper-efficient and horizontally scalable blockchain network aimed at enabling trustless computing on a massive scale.Our diverse team comprises experts from prestigious institutions such as Harvard, CMU, DFINITY, VMware, and Galaxy Digital, backed by renowned investors including Founders Fund, Kraken Ventures, SALT, and Amber Group.Role Summary:As an integral part of our software engineering team, you will lead the development of essential backend components for our blockchain network, with an emphasis on networking, reliability, and scalability. Your core responsibilities will include designing and implementing backend software components primarily in Rust, utilizing your comprehensive experience to ensure the creation, testing, debugging, and deployment of production-grade systems. You will also play a key role in upholding and enhancing high-quality software engineering standards within a significant open-source project.

At Profound, we are pioneering the essential agentic framework for contemporary enterprises. Our Workflow Runner serves as the execution backbone that transforms intricate AI tasks into dependable, modular workflows. In this role, you'll be instrumental in crafting the fundamental components—execution, scheduling, state management, and streaming—that drive intelligent systems at scale.Key ResponsibilitiesDevelop core workflow engine primitives designed to orchestrate agents, tools, and data flows.Take ownership of the real-time control plane, encompassing streaming events, reliable job orchestration, idempotency, and replay mechanisms.Deliver high-impact systems that transition prototypes into production-ready, scalable workflows.Design and implement Rust-oriented backend services with clean APIs for the creation, execution, and monitoring of graph or DAG workflows.Create reliable job orchestration with varied response modes, including blocking, streaming, and fire-and-forget, while ensuring durable state.Enhance tenant isolation, security, and access protocols across our platform.Optimize runtime behavior, including scheduling, backpressure management, timeouts, retries, and idempotency.Evolve schemas and repositories, managing migrations, indexing, and query optimization.Incorporate meaningful telemetry and elevate standards for testing and operational excellence.Collaborate closely with product, frontend, and data teams to roll out high-impact features.Who You AreDemonstrated portfolio or GitHub showcasing depth in backend or systems design.Proficient in a modern systems language, ideally Rust, and comfortable managing services end-to-end in a production environment.Solid understanding of SQL and relational data modeling, with practical experience in PostgreSQL.Familiar with distributed systems patterns, including messaging, streaming, retries, idempotency, and backpressure.Knowledgeable about caching and state management systems like Redis and real-time delivery using SSE or WebSockets.Strong understanding of API authentication, authorization, multi-tenancy, and security best practices.Pragmatic, collaborative, and product-focused, thriving in a dynamic in-person work environment.Experience in building or operating workflow engines, schedulers, or agent runtimes is a plus.

Company OverviewAt Tennr, we are revolutionizing the referral process in healthcare. When patients receive a referral from their doctors, the wait can often feel endless—sometimes lasting days, weeks, or even months. This delay is largely due to the overwhelming volume of referrals and the cumbersome manual processes that can hinder timely action. With our innovative technology powered by RaeLM™, Tennr ensures that every referral reaches its destination swiftly and accurately, with all necessary information in hand. We empower providers to capture more referrals, minimize denials, and eliminate waiting times.Role OverviewWe are on the lookout for a dedicated Backend Software Engineer who specializes in systems architecture, data modeling, and large-scale workflow orchestration. In this pivotal role, you will architect and implement features across our backend services and infrastructure, delivering significant value to our customers. Your responsibilities will include designing and optimizing data schemas, developing resilient backend services, and ensuring seamless integration with third-party systems.You will spearhead initiatives focused on high-volume workflow automation, emphasizing the creation and optimization of scalable data processing and machine learning infrastructure. This encompasses the design and maintenance of complex workflows that harness ML for automation, alongside performance optimization efforts to guarantee scalability and reliability throughout the stack.Collaboration is essential in this role. You will work closely with our sales and customer experience teams to incorporate valuable customer feedback, and partner with engineering colleagues to bring robust solutions to life. We are seeking someone who embodies a founder's mindset, excels in systems-wide thinking, and proactively drives projects from inception to completion.The ideal candidate will have substantial experience with backend architecture, event-driven systems, and orchestration frameworks, showcasing a proven history of developing production-ready systems. You will play a crucial role in shaping the technical foundation of our platform, ensuring its reliability, scalability, and adaptability as we continue to grow.

At Mirage, we are pioneering an AI-driven video platform that revolutionizes the production and editing process through natural language. Our innovative models harness contextual intelligence to replicate the creative decisions made by professional editors, thereby significantly enhancing productivity for experienced teams while democratizing video creation for all.Join our interdisciplinary team as we confront some of the most complex technical and creative challenges in generative media. As an early member of our team, your contributions will address foundational issues that remain largely unresolved in the industry, allowing you to make a substantial impact on the future of creative expression.Learn more about usProduct (Captions by Mirage) Research (Seeing Voices, technical-white-paper)Updates (Follow us on X / Twitter)TechCrunch, Forbes AI 50, Fast Company (press releases)Our Esteemed InvestorsWe are privileged to have the support of top-tier investors and visionary entrepreneurs, including Index Ventures, Kleiner Perkins, Sequoia Capital, Andreessen Horowitz, and many others.Please note that all roles require in-person attendance at our NYC headquarters located in Union Square.Role OverviewAs a Backend Software Engineer at Mirage, you will have the opportunity to engage in diverse areas including product development, platform engineering, and machine learning. You will be responsible for building and managing the systems, services, APIs, and machine learning pipelines that drive our product offerings. Collaborating closely with product, design, client, and AI teams, you will take ownership of critical backend systems from conception to completion, transforming ambitious ideas into robust and scalable production solutions.

About the Role:Parker is dedicated to a bold mission: empowering individuals to achieve financial independence. We believe that by providing independent business owners with essential financial tools, we can help them scale their operations profitably.Our flagship product merges a virtual corporate card with financial software designed for profitability, enabling eCommerce merchants to accelerate growth while effectively managing their margins.To date, we have successfully raised over $180M from top-tier investors, including Valar Ventures, Y Combinator, SVB, and industry pioneers such as Solomon Hykes (Docker), Paul Buchheit (Gmail), Paul Graham (Y Combinator), and Robert Leshner (Compound).As a dynamic Series B fintech, we are rapidly expanding, boasting a robust product-market fit, a burgeoning customer base, and a team driven by technical excellence and impactful solutions.We are seeking a Senior Software Engineer – Backend to architect, develop, and scale the critical systems that underpin Parker’s financial platform. In this pivotal leadership role, you will influence backend architecture, data infrastructure, and engineering best practices during our growth phase.You will work collaboratively with Product, Infrastructure, and Data teams to deliver high-performance, reliable systems that handle billions in transactions and empower thousands of merchants. This high-impact position is ideal for engineers who thrive on ownership, relish the challenge of complex systems, and prioritize elegant, maintainable solutions.What You’ll Do:Design and scale backend services that drive Parker’s financial products and APIs.Lead architectural strategies to guarantee performance, reliability, and scalability across our systems.Develop and maintain services in a modern cloud-native environment (Node.js, PostgreSQL, Docker, Kubernetes, AWS).Collaborate with product and infrastructure teams to create secure, user-friendly APIs and data models.Promote engineering excellence through code reviews, mentorship, and architectural guidance.Identify performance issues and spearhead initiatives to enhance reliability, observability, and system design.Contribute to the advancement of Parker’s technical roadmap and long-term engineering vision.

Join Grow Therapy as a Backend Software Engineer, where you'll play a pivotal role in developing our cutting-edge software solutions. Collaborate with a talented team to enhance our platform's functionality and performance, ensuring a seamless experience for our users.

About AKASAAt AKASA, we are on a transformative journey to redefine healthcare through the power of artificial intelligence. As a trailblazer in generative AI solutions tailored for the healthcare revenue cycle, we empower health systems to accurately capture and relay the complete patient clinical journey. By enhancing operational efficiency, we enable these systems to prioritize what truly matters: delivering exceptional patient care. With over $205 million raised in funding from esteemed investors like Andreessen Horowitz, BOND, and Costanoa Ventures, our future is bright.Now is the most thrilling time to become part of AKASA. Since launching our innovative AI-native product suite in 2024, revenue bookings have surged over 20 times. We have set records by closing the largest deals in our company’s history three times in a row, driven by the substantial advancements we've made in clinical quality and documentation accuracy—two critical areas for health system leaders.Our implementations have garnered national attention, being recognized as "one of the most comprehensive real-world applications of GenAI in healthcare finance to date" (link). Our clientele represents over $120 billion in net patient revenue and includes pioneering health systems like Cleveland Clinic, Duke, Stanford, and Johns Hopkins.Recently, we have been honored with accolades such as being named the #1 most promising healthcare RCM startup of 2025 by Black Book Market Research and listed among the fastest-growing GenAI startups to watch by AIM Research. Our CEO has been recognized as one of the “Top 50 Healthcare Technology CEOs” by the Healthcare Technology Report, and we have proudly maintained our status as a “Great Place to Work” for five consecutive years.Join us as we build on this momentum to redefine the possibilities within healthcare. We seek exceptional talent to help accelerate this mission.About the RoleAs a Senior Backend Software Engineer, you will develop AI-driven solutions for our Clinical Documentation and Medical Coding suite. Collaborating closely with product, design, and machine learning teams, you will design and implement services, APIs, and tools that enhance our SaaS offerings. You will have the opportunity to work on groundbreaking projects that directly impact healthcare delivery.

At Bubble, our mission is clear: we aim to empower everyone to create software. We believe that anyone with a transformative idea should have the means to bring it to life. Our AI-driven visual development platform allows individuals, from first-time entrepreneurs to established enterprise teams, to transform ideas into fully functional, scalable applications across web, iOS, and Android—all without the need for coding or managing complex workflows.As the sole full-stack, cross-device no-code platform, Bubble has garnered over 5 million users across more than 100 countries, breaking down barriers to entrepreneurship and innovation worldwide.Our Achievements:Our platform is thriving, with entire VC-backed companies being built solely using Bubble. After successfully finding product-market fit and eight years of bootstrapping, we secured a $100 million Series A funding round, establishing ourselves as one of the fastest-growing companies within the New York tech ecosystem. The potential of Bubble is demonstrated by our community—individuals are not just launching products; they are creating viable businesses. For instance, Mailead turned a $10k investment in a Bubble product into a $2M valuation, while Faceless.video achieved over $1M in annual recurring revenue within a year.About the Platform Team:Our Platform team is dedicated to enhancing our scaling, reliability, and enablement capabilities as we aim to double our customer base in the coming years. Our responsibilities encompass both scalable infrastructure and our core backend systems. Success in this role means delivering timely capacity, executing workloads rapidly, and guaranteeing data scalability across diverse applications while managing costs and addressing implementation and infrastructure inefficiencies.About the Role:Join a small, elite team tackling challenges faced by the largest cloud providers. This position is an opportunity to be at the forefront of a platform that is revolutionizing the traditional engineering stack globally. Additionally, you will contribute to fostering an inclusive, effective, and collaborative engineering culture. This role requires after-hours and on-call availability.

About Sei LabsAt Sei Labs, we are pioneering the development of open-source technology for the Sei Blockchain—a groundbreaking parallelized EVM Layer 1 blockchain engineered for scalability. Our innovative optimizations empower Web3 applications to achieve Web2-scale performance, significantly contributing to the mass adoption of digital assets.Our dynamic team comprises seasoned professionals from leading companies such as Google, Goldman Sachs, Robinhood, Nvidia, and Databricks, all committed to ushering in the next billion users into a flourishing ecosystem of applications.Sei Labs has successfully secured over $30 million in funding from prominent investors, including Jump Crypto, Multicoin Capital, Coinbase Ventures, Distributed Global, Hudson River Trading, and Flow Traders.Visit our website and docs for more information.Incubations Engineering at SeiWe are seeking a talented Backend Software Engineer to join our Incubations team and play a crucial role in shaping the future of Web3. You will collaborate with our ecosystem partners to create innovative, high-impact applications across the Sei Blockchain, including decentralized applications (dApps) in various domains such as decentralized exchanges (DEXs), gaming, decentralized physical infrastructure networks (DePin), artificial intelligence, and more. If you thrive in a fast-paced, community-focused environment and are eager to learn and grow, this is an exceptional opportunity to redefine the possibilities of decentralized technology.

About The Role:At Parker, our mission is clear yet ambitious: to empower individuals toward financial independence. We believe that providing independent business owners with the essential financial tools is the best way to help them scale their businesses sustainably.Our flagship product features a virtual corporate card equipped with dynamic spending limits alongside software tools focused on profitability. This empowers eCommerce merchants to accelerate their growth while maintaining control over their financial margins.Having successfully raised over $180M in equity and debt from renowned investors such as Valar Ventures, Y Combinator, SVB, as well as influential founders like Solomon Hykes (Docker), Paul Buchheit (Gmail), Paul Graham (Y Combinator), and Robert Leshner (Compound), we are a rapidly scaling Series B fintech company experiencing high product-market fit and increasing demand.We are on the lookout for a Backend Software Engineer to architect and scale the fundamental systems that ensure our platform remains fast, reliable, and secure. Your responsibilities will encompass designing APIs, modeling data, and optimizing infrastructure for enhanced performance and growth. We seek engineers with a robust systems mindset and at least 5 years of experience in building backend services from scratch—individuals who appreciate thoughtful abstractions, understand how to act swiftly without compromising on reliability, and enjoy collaborating with product and infrastructure teams to create scalable impact.

Company OverviewTennr is revolutionizing the referral process in healthcare by ensuring that every patient referral is handled swiftly and efficiently. By utilizing our innovative RaeLM™ technology, we extract and manage patient information, enabling healthcare providers to capture more referrals, minimize denials, and significantly reduce delays.Position OverviewWe are on the lookout for a talented Senior Backend Engineer who is enthusiastic about systems architecture, data modeling, and large-scale workflow orchestration. This role involves designing and implementing features across our backend services to deliver exceptional customer value. You'll have the opportunity to design and optimize data schemas, build reliable backend services, and ensure smooth integration with third-party systems.Your expertise will play a vital role in high-volume workflow automation, focusing on developing and optimizing scalable data processing and machine learning infrastructure. This entails creating and maintaining complex workflows that utilize machine learning for automation, as well as leading performance optimization efforts to uphold best practices throughout the stack.Collaboration is essential—you will team up with sales and customer experience teams to integrate customer feedback and work alongside engineering colleagues to deliver robust solutions. We seek an individual who adopts a founder’s mindset, excels in systems-wide thinking, and takes the initiative to drive projects from concept to completion.The ideal candidate will possess profound experience in backend architecture, event-driven systems, and orchestration frameworks, and have a proven track record of building production-ready systems. You will be instrumental in shaping the technical foundation of our platform to ensure reliability, scalability, and adaptability as we grow.

Join Flex, a dynamic and innovative FinTech company based in NYC, as a Senior Backend Software Engineer. In this pivotal role, you will be instrumental in architecting, developing, and scaling backend services and APIs that empower our groundbreaking rent payment platform. Collaborate with cross-functional teams to deliver resilient and efficient systems that enhance the renting experience for users and partners alike. You will oversee every aspect of the service lifecycle, from initial requirements gathering and system architecture to implementation, testing, deployment, and ongoing monitoring. Additionally, you will have the opportunity to mentor junior engineers and promote technical best practices within the team, fostering a culture of excellence and collaboration.

Noise Labs is building tools that blend diverse online data and market insights to help users navigate uncertain times. Based in SoHo, New York City, the team is small (10 people), collaborative, and values thoughtful design and high-quality engineering. Remote work is possible. What You’ll Do Develop backend systems that power consumer features such as feeds, ranking algorithms, notifications, real-time interactions, and social elements. Build and maintain a codebase that supports both developer and automated agent confidence. Own core product services, data flows, and APIs. Design infrastructure where speed and accuracy matter, especially for settlement, pricing, and real-time financial transactions. Improve the development environment, including CI, testing, and observability. Requirements Skilled in using AI tools to speed up development. Strong judgment for balancing latency and accuracy in financial systems. Deep experience with TypeScript, relational databases, real-time communications, and event-driven data flows in finance. Comfortable working in a strict monorepo setup with clear service boundaries and conventions. Ability to independently debug and improve the development pipeline. Clear communicator for async updates, incident reviews, and team problem-solving. Bonus Points Experience with Effect-TS. Side projects, open source work, or previous startup experience. Compensation and Benefits The minimum full-time salary ranges from $160,000 to $210,000, in compliance with New York City's Pay Transparency Law. Full-time employees at Noise Labs are also eligible for additional compensation, including equity and benefits, based on the specific role.

At Highlight, we're creating a revolutionary shared intelligence layer tailored for today’s dynamic workforce. Our platform integrates context across all team members and tools, effectively dismantling information barriers. It adapts to your organization, intelligently routing knowledge and consistently automating workflows.About the PositionWe are in search of a Senior Backend Software Engineer to be responsible for essential backend infrastructure, including systems for team management, permissions, and integration-driven workflows. Your primary focus will be to enhance and scale our systems with a strong emphasis on performance, reliability, and an exceptional user experience.This role is perfect for an individual passionate about the convergence of desktop software, native development, and AI integration, and who thrives in a collaborative, fast-paced environment.Please note: This position requires on-site presence at our New York City office five days a week.Key ResponsibilitiesDevelop backend systems that facilitate product expansion, including multi-tenant architectures, permissions, and internal/admin tools.Design and manage asynchronous processing systems for background tasks and workflow orchestration.Optimize system performance and cost through practical techniques such as caching, batching, and efficient data access patterns.Create secure and extensible integration frameworks, including authentication mechanisms, APIs, and third-party connectors.Enhance backend engineering standards through observability, rigorous testing, incident preparedness, and operational best practices.Collaborate across departments to deliver features from inception to deployment while designing durable, extendable, and easily adjustable backend systems.Candidate ProfileWe are looking for someone eager to shape the AI-driven user experience of the future. We value extreme ownership, accountability, and initiative.This role is ideal for individuals who enjoy building scalable systems and enhancing observability while minimizing costs through practical optimizations such as caching, batching, and queue-based processing. You will work closely with product and machine learning teams to ensure Highlight remains reliable and high-performing as we scale.

About Pangram LabsAt Pangram Labs, we are dedicated to ensuring authenticity through the development of cutting-edge AI detection systems. Our team is at the forefront of research, creating algorithms and products that integrate our advanced technology into everyday life.We seek individuals who are proactive, mission-focused, and passionate about innovation to join our in-person team based in Brooklyn, New York.About the RoleWe are on the lookout for a Senior Software Engineer with a backend emphasis to design, implement, and scale our production systems, which support our core technology for a rapidly expanding user base.In this senior-level position, you will be responsible for the backend infrastructure that drives Pangram's AI detection platform. You will have the autonomy to make architectural decisions, tackle complex scaling challenges, and ensure that our systems remain reliable and efficient as user demand increases. Collaborating closely with our frontend and machine learning teams, you will work primarily with our Django backend and AWS infrastructure.What You'll DoDesign and develop scalable backend services and APIs to deliver AI detection features effectively.Ensure the reliability, performance, and observability of our production systems.Architect and manage data pipelines, caching layers, and service infrastructure using AWS.Collaborate with machine learning engineers to deploy and manage machine learning models in production.Identify and resolve performance bottlenecks as user traffic and system complexity increase.Establish and enhance engineering best practices related to testing, deployment, and incident management.

Join Centari - A Leader in Deal IntelligenceAt Centari, we are revolutionizing high-stakes dealmaking by unlocking the potential of private deal data. As we develop the future's deal intelligence platform for law and finance, we go beyond mere automation, embracing a data-driven approach to empower negotiation teams globally with strategic insights. Our proprietary Deal Reasoning Engine transforms complex documents into invaluable knowledge, ensuring our clients have the upper hand in negotiations.Our dynamic team consists of attorneys, financial experts, and engineers who thrive in a hybrid, cross-cultural environment. We are proud to be supported by leading enterprise AI investors, including GTMfund, former DoorDash board member Jeremy Kranz, Seamless co-founder Andy Appelbaum, Jack Altman, South Park Commons, and Recall Capital.We embrace complexity, as it is the breeding ground for innovation. If you are a builder who excels in ambiguity and embodies radical ownership, we want to connect with you.For further details, visit centari.com or follow us on LinkedIn.Role OverviewWe are seeking a Senior Backend Software Engineer to join our innovative product team. You will play a pivotal role in designing and developing Centari's core AI technology. Collaborating with fellow engineers who share a passion for action, you will write code, influence product direction, engage with clients, and drive projects from concept through to implementation.Our technology stack includes Go and React/TypeScript, utilizing state-of-the-art LLM technologies across our infrastructure, search, and persistence layers. If you have a passion for building impactful LLM applications and enjoy tackling complex challenges, we want to hear from you.

About AnthropicAt Anthropic, our mission is to design AI systems that are reliable, interpretable, and steerable. We aim to ensure that AI technology is safe and advantageous for both our users and society as a whole. Our rapidly expanding team consists of dedicated researchers, engineers, policy experts, and business leaders collaborating to create beneficial AI systems.About the Role:We are in search of seasoned, product-oriented Software Engineers to take ownership of the backend systems that enhance user experiences across our API, Claude Code, and Claude.ai. In this role, you will independently define complex, multi-month projects within ambiguous problem domains and guide your peers in making technical and product-related decisions. You will align with product management, engineering teams, and research to identify capability gaps and translate cutting-edge model advancements into deployable products. Your architectural decisions will significantly impact the reliability and scalability of systems serving hundreds of thousands of global users, including internal teams, while you remain actively engaged with the code and our models.We are currently hiring for multiple teams. Team assignments will be made post-interview, considering your preferences and experience alongside organizational requirements. This flexible approach allows us to pair talented engineers with backend product initiatives where they can make the most significant impact and experience the most growth:API Core: You will develop and enhance the foundation of the Claude API—systems that deliver Claude's intelligence to developers ranging from startups to large enterprises. You will manage the performance, reliability, and efficiency of our core serving path, ensuring users derive maximum speed and value from our models. Collaboration with inference and safeguards will be key to optimizing the entire stack.API Capabilities: You will empower developers by integrating frontier model capabilities into the Claude API, overseeing core features such as vision, tool usage, and computer interaction. Your responsibilities will include launching new models and delivering the building blocks that enhance Claude's capabilities with each release, working directly with research and inference to productionize future advancements.API Knowledge: Your focus will be on transforming Claude into a true knowledge worker by ensuring the model has timely access to the right information. You will facilitate secure data access for developers, enabling Claude to automatically process and retrieve relevant data as needed.