Senior Software Engineer - Backend

Join finvari as a Senior or Staff Backend Engineer and be a pivotal part of our innovative team. In this role, you will design and implement scalable server-side solutions, contributing to the development of cutting-edge financial technology products. You will collaborate with cross-functional teams to deliver high-quality software that meets the needs of our clients.

Join Aerostrat as a Senior Backend Engineer where you will play a pivotal role in developing robust, scalable backend systems. You will collaborate with cross-functional teams to deliver innovative software solutions that drive our business objectives. This position is perfect for someone who is passionate about technology and eager to contribute to high-impact projects.

Coupang is a leading name in South Korean e-commerce, known for dependable service and rapid innovation. With offices in Mountain View and Seattle, the company blends a startup’s drive with the backing of a global public organization. The culture supports both individual growth and strong teamwork. Initiative is valued at Coupang. Team members often launch new projects and play a direct role in shaping the company’s direction. Entrepreneurial thinking is encouraged, and those who drive improvements are recognized for their impact on both personal and company development. Coupang’s ambitions reach beyond standard commerce. The company regularly tackles challenging projects, always looking for new ways to improve technology and customer experience. Role overview The Senior Staff Backend Engineer will be part of the Application Infrastructure team. This group is responsible for building and enhancing complex workflow systems that power Coupang’s core services, including the rocket delivery platform. Their work supports systems that manage hundreds of millions of dollars in revenue. What you will do Design and develop a new, scalable workflow service from the ground up Make workflow development easier for domain teams Ensure the infrastructure can support growing business demands Help shape a critical system at the center of Coupang’s operations

Role overview Coupang seeks a Senior Staff Backend Engineer based in Mountain View or Seattle. This position leads the design and implementation of scalable backend systems that power Coupang’s ecommerce platform. Key responsibilities Shape architecture decisions for backend services supporting millions of customers Collaborate with engineers to develop and maintain reliable, high-performance systems Use modern technologies to improve service quality and customer experience Team environment Work alongside an experienced engineering team dedicated to building and enhancing the core services that drive Coupang’s global ecommerce operations.

Since our inception, we have revolutionized the approach to small-dollar loans, having provided over $1 billion in funding to more than 1.5 million customers, and issued over 4 million loans that have saved our clients more than $650 million.At Possible, we are developing an innovative consumer finance company that prioritizes helping our customers avoid debt rather than profiting from it. As a Public Benefit Corporation, our mission is to facilitate economic mobility in communities through affordable credit products designed to foster financial health for generations. Join the team that is turning our vision into reality.About the RoleWe are in search of a skilled Senior Software Engineer to bolster our engineering team. In this role, you will be responsible for designing, developing, and maintaining high-performance, reliable, and scalable services utilizing Java, the Spring Framework, gRPC, and GraphQL. As a senior member of the team, you will offer technical leadership, mentor junior engineers, and inspire innovation in your domain.

Join Duolingo as a Senior Backend Software Engineer and play a pivotal role in building scalable and innovative backend systems that enhance the learning experience for millions of users worldwide. Collaborate with cross-functional teams to design, develop, and maintain high-performance APIs and services that are critical to our platform's success.

About RevefiFounded in 2021 by visionary entrepreneurs Sanjay Agrawal and Shashank Gupta, who also co-founded ThoughtSpot with a valuation exceeding $4.2 billion, Revefi is revolutionizing data spend optimization. Our innovative AI Agent is designed to unify observability across data quality, usage, spend, and performance, representing a groundbreaking platform tailored for modern data teams. With backing of $20 million in Series A funding from esteemed investors including Icon Ventures, Mayfield Fund, GTM Capital, and StepStone Group, we are committed to shaping the future of Data Spend Optimization and Cloud Data Operations.The RoleWe are on the lookout for a highly skilled and experienced Senior Backend Engineer to join our vibrant team. In this pivotal role, you will spearhead the design, development, and maintenance of our state-of-the-art cloud-based Software-as-a-Service (SaaS) platform. You will be instrumental in guiding the technical direction, architecture, and implementation of our backend systems. Collaboration with cross-functional teams—comprising product managers, frontend engineers, and DevOps professionals—will be crucial in delivering high-quality, scalable, and robust solutions.Are you ready to take on the challenge of building an exceptional product and team from the ground up? If you thrive in an environment focused on developing a remarkable distributed team and creating a resilient enterprise product tech stack, you’ve found the right opportunity!

Senior Backend Software EngineerJoin Read AI's innovative Backend team as a Senior Software Engineer. In this pivotal role, you will be instrumental in designing, developing, and optimizing robust backend systems that fuel our AI-driven productivity platform. Engage in a dynamic, collaborative setting where you’ll deploy code weekly and make a substantial impact on millions of users.Complete your application with a Provn skills assessment.

Join our innovative team at Plaid as a Senior Backend Software Engineer. In this role, you will be responsible for developing scalable backend systems that empower our users and partners. Your expertise in backend development will help us enhance our platform's capabilities and deliver exceptional user experiences.

Join Aircall as a Senior Backend Software Engineer and play a pivotal role in shaping our backend systems. You will be responsible for designing and implementing scalable, reliable, and high-performance software solutions. Collaborate with cross-functional teams to develop innovative solutions that meet our customers' needs.

Integrate develops program management software for complex hardware projects, serving organizations in deep tech sectors like aerospace, robotics, and autonomous vehicles. The platform connects vendors, customers, and partners to streamline collaboration across company boundaries. By reducing manual work and communication barriers, Integrate supports teams working on demanding technical challenges. The company addresses the unique needs of hardware development, where traditional software often falls short. Integrate's solutions focus on improving coordination and communication for both internal teams and external stakeholders, helping organizations innovate more quickly and reliably. Role overview The Senior Backend Engineer will focus on building and scaling the infrastructure layer of Integrate’s platform. This position centers on new development, not maintenance. The work involves tackling distributed systems challenges, large-scale data federation, and architectural design to support an expanding customer base. Engineers at Integrate collaborate closely, make decisions quickly, and value technical rigor. Experience with large-scale systems, such as cloud migrations, distributed data pipelines, microservices, or event-driven architectures, is especially relevant for this role. Key responsibilities Design and scale distributed backend systems that process high-throughput, real-time data with complex dependencies. Profile and debug Go and Rust services to resolve performance issues. Contribute to data federation architecture, including S3 integration, graduation pipelines, and downstream data services. Develop and refine gRPC service interfaces and REST/JSON APIs for both internal and external use. Work with SQL and NoSQL databases, focusing on schema design, query optimization, and ensuring data durability. Collaborate with platform engineers and technical leads on infrastructure decisions. Instrument, monitor, and debug production systems, including participation in on-call rotations, root cause analysis, and incident management. Tech stack Main development uses Go, with Python for tooling and data workflows. The stack includes gRPC, REST/JSON, GraphQL, PostgreSQL, NoSQL databases, and Kubernetes-managed infrastructure. Infrastructure as code is managed with Terraform. Location This position is based in Seattle, WA.

JOIN DURANTA: A PIONEER IN GEOSPATIAL ANALYSISAt Duranta, we are dedicated to cultivating a more beautiful world through advanced geospatial data analytics. Our innovative platform empowers contractors to design, install, and maintain stunning outdoor spaces via seamless workflows.We are on the lookout for a Senior Backend Engineer to become a vital part of our dynamic team. In this role, you will lead the backend development for both our web application and mobile applications. Your focus will be on creating an optimized system where performance is paramount, ensuring a flawless user experience where every millisecond counts.

Join Our Team as a Senior Backend Engineer (Golang & AI Automation)Location: Seattle, WA (Hybrid) or Remote (US-based) Job Type: Full-time Salary Range: $140,000 – $180,000 / yearAbout the Opportunityeqltech is proud to partner with an innovative seed-stage startup in Seattle that is revolutionizing the workplace with advanced automation solutions.Picture a future where intricate workflows are simplified through the mere act of screen recording. Our client is creating the technology that transforms video inputs into dynamic, automated workflows powered by cutting-edge AI.This position offers a unique

Role Overview Rebuild Manufacturing is building Reflow, an AI-enhanced platform for hardware product development. The platform connects with the tools hardware teams already use, maintains visibility across every program, and coordinates changes across disciplines. The goal: prevent missed context and overlooked change requests that can disrupt hardware projects. This role calls for a senior backend engineer to help create the core services and AI infrastructure behind Reflow. The work is hands-on and high-impact, with support from a parent company recognized for its leadership in engineering and manufacturing. What You'll Do Design and build RESTful APIs with OpenAPI specifications and auto-generated client SDKs, using Python, FastAPI, SQLAlchemy, and PostgreSQL. Create ingestion pipelines with Celery and Redis to connect with file storage, messaging, and email systems, turning unstructured inputs into structured engineering artifacts. Develop and refine agentic AI workflows using LangChain, LangGraph, and related tools for data extraction, risk analysis, dependency mapping, and proactive team coordination. Integrate LLM APIs (including Anthropic Claude and OpenRouter) with features like streaming (SSE), error handling, and cost management. Deploy and manage services on Google Cloud Platform (Cloud Run, Cloud SQL, Memorystore) using Terraform. Who We're Looking For Proven experience delivering reliable, well-architected backend systems and taking ownership of the services built. Strong skills with Python, FastAPI, and PostgreSQL. Comfort with building everything from REST APIs to background task pipelines and AI agent infrastructure. Regular use of AI coding tools such as Cursor, Copilot, or Claude to boost productivity. Interest in building the backend for an AI-native platform supporting complex hardware development. Ability to work closely with engineers, AI researchers, and product leadership to turn unstructured data (like call transcripts, emails, documents, datasheets) into structured engineering outputs (requirements, project plans, dependencies). Hands-on approach: active coding, contributing to system design, and helping set backend engineering standards as the team grows. Locations Framingham, MA; Los Angeles, CA; Seattle, WA

Join Coupang as a Senior Director of Backend Engineering in AI Infrastructure Orchestration!About Us: At Coupang, our mission is to amaze our customers. We thrive on the feedback that our customers give us, often exclaiming, 'How did we ever live without Coupang?' Our company is built on a passion for transforming the shopping, dining, and living experience into something unparalleled, effectively revolutionizing the multi-billion-dollar e-commerce sector from the ground up. We have established ourselves as one of the fastest-growing e-commerce companies, earning a reputation as a dominant and trustworthy player in South Korean commerce.We embody the best of both worlds: a dynamic startup culture paired with the extensive resources of a global public company. This unique combination propels our growth and allows us to launch innovative services at a remarkable pace. Our team is composed of entrepreneurial spirits who are eager to seize new initiatives and drive innovation. We pride ourselves on being bold and ambitious, always ready to roll up our sleeves and make a tangible difference. At Coupang, you will witness personal, team, and company growth each day.Join us in our quest to redefine the future of commerce. We continually challenge the limits of what's possible to resolve issues and transcend traditional boundaries. Be a part of Coupang and help create extraordinary experiences in an ever-connected, high-tech world.

Maxana is on the lookout for a talented and seasoned Backend Engineer to join our dynamic team, working on behalf of a confidential client: a leading AI platform utilized by machine learning teams across the globe. In this pivotal role, you will take ownership of features from inception to deployment, focusing on APIs, CLI tools, billing systems, and platform integrations. Our small, highly skilled team sets a high engineering standard, and you will collaborate closely with product and engineering leaders to drive innovation.Key ResponsibilitiesDevelop and maintain clean, efficient, and production-ready code in Go (Golang).Design, build, and scale APIs, CLI tools, billing systems, and security integrations.Collaborate with engineering and product leadership to define technical direction for substantial projects.Assess and enhance technical architecture, tooling, and workflows.Promote software quality, support continuous delivery, and actively mitigate technical debt.Provide mentorship to fellow engineers on system architecture and navigating high-uncertainty environments.

Join Opendoor as a Backend Software Engineer focused on Pricing, where you will play a pivotal role in shaping the future of real estate transactions. You will leverage your technical expertise to develop and optimize backend systems that drive pricing strategies, ensuring our platform delivers accurate and timely information to our users.

About the RoleJoin Clarify as a Senior Backend Engineer and play a pivotal role in developing the essential systems that underpin our AI-driven CRM. Collaborate closely with the founders to design and implement critical infrastructure, including data pipelines, integration frameworks, and tools that enhance developer productivity and system reliability. This is an exciting opportunity for individuals who have experience in building scalable platforms and are eager to establish best practices using modern technologies and AI-first concepts.Your ResponsibilitiesDevelop core platform systems such as data pipelines, integration frameworks, API infrastructure, and developer tools.Design scalable data models and storage strategies to support complex CRM workflows and AI functionalities.Implement observability, monitoring, and performance metrics to ensure reliability as we expand to serve thousands of customers.Establish platform standards for API design, service architecture, testing methodologies, and deployment processes.Make key technical decisions regarding infrastructure, architectural patterns, and technology stack.Collaborate with the founders on technical strategies that balance innovation with practical execution.

About HiveHive is at the forefront of cloud-based AI technology, designed to enhance the understanding, searchability, and generation of content. We are proud to partner with some of the most innovative and renowned organizations worldwide. Our platform empowers developers through a suite of pre-trained AI models, which handle billions of API requests every month. Additionally, Hive provides ready-to-use software applications powered by our proprietary AI models and datasets, enabling transformative solutions across various industries, including content moderation, brand protection, sponsorship analysis, and context-driven ad targeting.With over $120M raised from top investors like General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, Hive boasts a diverse workforce of over 250 employees across our offices in San Francisco, Seattle, and Delhi. We invite you to be part of the AI revolution!About the RoleTo realize our ambitious vision, we are expanding our team of exceptional engineers. We are seeking innovative developers who are eager to launch new products and features, can operate independently, and are enthusiastic about exploring new technologies. The ideal candidate possesses a strong background in building core services and web-based APIs from scratch, values the intersection of product and technology, and is skilled in writing clean, maintainable code.