Mid-Senior Backend Engineer – AI Solutions

JoinReady is looking for a Mid-Senior Backend Engineer to join the Delivery Engineering team. This position is fully remote and focuses on building and supporting AI-powered conversational solutions for B2B and B2C clients across Latin America. Much of the work centers on WhatsApp-first experiences, conversational automation, commerce integrations, and manag…

Join Arbiter-AI as a Senior Backend Engineer, where you will be instrumental in developing and optimizing backend systems for our innovative AI solutions. Collaborate with cross-functional teams to design robust, scalable architectures while ensuring high performance and responsiveness to requests from the frontend. Your expertise will be key in driving the technical direction of our backend systems.As a leader in backend development, you will mentor junior engineers, promote best practices in coding, and contribute to our mission of delivering cutting-edge technology to our clients. This is an exciting opportunity to make a significant impact in a dynamic and fast-paced environment.

Join arbiter-ai as a Senior Backend Engineer specializing in integrations, where you will play a pivotal role in crafting and optimizing the backend systems that drive our innovative AI solutions. This remote position offers the opportunity to collaborate with cross-functional teams to improve our integration processes and enhance the overall functionality of our products.

Join Arbiter, a pioneering AI-driven care orchestration platform that is revolutionizing the healthcare landscape. We are excited to introduce our cutting-edge, patient-centric platform designed to enhance patient outcomes through an innovative multimodal approach. Our mission is to streamline intricate healthcare workflows that directly engage with patients, leveraging the latest advancements in agentic AI technology to deliver superior patient outcomes. We are seeking skilled engineers and leaders to join our dynamic team and help redefine the possibilities of agentic workflows in the healthcare sector. With substantial backing from one of the largest seed funding rounds in health tech's history and a team of seasoned operators equipped to scale nationally, we are committed to creating the interconnected infrastructure that healthcare has long needed.Our Engineering Culture & ValuesAt Arbiter, we pride ourselves on our high-performance engineering team, dedicated to developing innovative, high-quality solutions for our clients and partners. We embrace:Engineering Excellence: We take great pride in our technical craftsmanship and the products we create, treating both with the utmost care and respect.Impact-Driven Development: We are dedicated to building robust, fault-tolerant, and highly scalable systems that adapt seamlessly to changing business needs, minimizing disruptions.Collaboration Over Ego: Exceptional work and groundbreaking ideas are our priority. We look for talented individuals who thrive in a fast-paced environment and are motivated to deliver impactful results.Continuous Growth: We foster a culture of ongoing learning, mentorship, and professional development, allowing you to deepen your expertise and advance your career.ResponsibilitiesAs a Senior Backend AI Engineer, you will be instrumental in designing, building, and maintaining the backend AI systems that fuel Arbiter’s intelligent care orchestration platform. You will take ownership of key components of our agentic infrastructure, including low-latency inference pipelines, workflow automation, and service orchestration. Collaborating closely with product, data, and clinical partners, you will deliver production-grade AI systems that are essential for our customers.Develop the Agentic Platform: Design and implement the backend systems that enable Arbiter’s agent-driven care orchestration workflows, focusing on service orchestration, inference pipelines, and automation primitives.

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 Cloudflare as a Senior Solutions Engineer in our Mid-Market division. In this pivotal role, you will leverage your technical expertise and client-facing skills to deliver innovative solutions to our diverse clientele. You’ll work closely with sales teams, providing insights and strategies to enhance customer engagement and drive satisfaction. If you are passionate about technology and have a knack for problem-solving, we want to hear from you!

Cresta is dedicated to transforming every customer interaction into a strategic advantage by harnessing the power of artificial intelligence in the contact center. Our innovative platform merges the strengths of AI with human insight, enabling contact centers to uncover valuable customer insights, streamline conversations, and empower their teams to operate more efficiently. Founded by visionary leaders from Stanford AI lab, including Sebastian Thrun, a pioneer behind Google X, Waymo, and Udacity, Cresta is led by Ping Wu, co-founder of Google Contact Center AI and Vertex AI platform, alongside co-founder Tim Shi, an early member of OpenAI. Join us in this exciting mission to redefine the future of work with AI technology. The future of work is not just coming; it’s already here at Cresta.

Join Klaviyo as a Senior Solutions Engineer focused on Mid-Enterprise clients. In this pivotal role, you will leverage your technical expertise and consultative approach to drive innovative solutions that empower businesses to achieve their marketing goals. Collaborate closely with sales teams to understand client needs, design tailored solutions, and deliver exceptional results.

About Stack AIStack AI is an innovative no-code platform that empowers users to design, test, and deploy AI workflows using large language models. Our intuitive drag-and-drop interface enables teams to seamlessly connect data sources with AI models, facilitating the development of production-grade applications such as chatbots, document processing pipelines, and database Q&A tools, all without the need for coding.As we transition from thousands to millions of users, we require a dedicated technical leader to enhance our backend systems. This is where you come into play.The RoleWe are in search of a Staff Backend Engineer to take ownership of our platform's core infrastructure. In this pivotal technical leadership role, you will influence our architectural framework, define engineering standards, and make key infrastructure decisions that will shape the scalability of Stack AI.You will collaborate directly with our founders and product leaders, navigating the balance between speed and sustainability within our fast-paced startup environment, where your contributions will have a significant impact on the entire product.What You'll DoDesign and scale core systems — Architect, develop, and manage the backend services that drive our no-code AI platform, encompassing everything from the API layer to the data pipeline.Lead identity and authentication infrastructure — Oversee our SSO, SAML, and OIDC integrations, ensuring our authentication framework meets enterprise-level standards and scales with our growing customer base.Establish technical direction — Set forth design patterns, service boundaries, data modeling strategies, and long-term infrastructure plans.Mentor and uplift the team — Enhance team performance through design reviews, collaborative coding sessions, knowledge sharing, and the establishment of best practices throughout backend engineering.Enhance reliability and observability — Proactively identify performance bottlenecks, optimize efficiency, and advance our infrastructure to prevent issues before they escalate.What We're Looking ForRequired Qualifications6+ years of backend engineering experience, demonstrating a history of operating at the Staff level or serving as a technical lead on complex, production systems.Extensive knowledge of SSO, SAML, and OIDC — with hands-on experience in building or managing identity and authentication systems.Comprehensive understanding of identity provider (IdP) architecture and enterprise authentication methodologies.

Role overview The Senior Solutions Engineer - Mid-Market at Cloudflare, Inc. plays a key role in bridging technical expertise with customer needs. Based in Austin, this hybrid position focuses on supporting both customers and sales teams by providing technical guidance and creating solutions tailored to each client. What you will do Work closely with sales teams and clients to identify business goals and technical requirements. Design and present solutions that directly address client challenges and objectives. Guide clients through the implementation process to help ensure a seamless experience. Location This role is located in Austin and follows a hybrid work model, combining in-office and remote work.

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

At Ironclad, we are revolutionizing the way contracts are managed with our advanced AI contracting platform. Our innovative solutions transform agreements into valuable assets, enabling smoother transactions, immediate insights, and empowering agents to drive progress—all while maintaining user control. Whether engaging in buying or selling, Ironclad consolidates the entire contracting journey on a single intelligent platform, equipping leaders with the insights needed to stay ahead of the competition. This is why renowned organizations such as OpenAI, the World Health Organization, and the Associated Press choose Ironclad to enhance their business operations.Recognized as an industry leader, Ironclad has been acknowledged in the Forrester Wave and Gartner Magic Quadrant for Contract Lifecycle Management, named a Fortune Great Place to Work, and listed among Fast Company’s Most Innovative Workplaces. Furthermore, we are proud to be featured in Forbes’ AI 50 and Business Insider’s Companies to Bet Your Career On. Our growth is supported by esteemed investors including Accel, Y Combinator, Sequoia, BOND, and Franklin Templeton. For further details, visit www.ironcladapp.com or connect with us on LinkedIn.About the RoleAs a Senior Solutions Engineer (SE) at Ironclad, you will serve as a pivotal pre-sales technical expert, closely collaborating with our Mid-Market Sales team. Your role will involve engaging with prospects and coordinating with Ironclad’s Sales, Customer Outcomes, Implementation, and Product teams to facilitate efficient, value-driven evaluations and achieve successful customer outcomes.Mid-Market SEs are crucial to our sales momentum. You will excel by mastering the technical win through agile, customized solution designs that demonstrate precisely how we address the unique challenges prospects face today while preparing them for future growth. If you are a creative problem-solver who thrives in a fast-paced environment and enjoys crafting tailored solutions for diverse users, this opportunity is for you.With an in-depth understanding of Ironclad's platform and common contracting workflows for mid-market clients, SEs will empower prospects to confidently recognize how Ironclad can facilitate their growth. Additionally, SEs will provide invaluable feedback to the Product team by identifying recurring market needs and translating them into actionable insights that enhance the platform at scale.

Join our innovative Data Solutions team, where we're developing the core intelligence platform relied upon by prominent public and private sector organizations to investigate threats, monitor risks in real-time, and extract valuable insights from blockchain and related data on a large scale. We prioritize agility and efficiency, seeking engineers who are eager to take ownership, thrive in a fast-paced environment, and are motivated by the mission requirements of our clients to deliver significant real-world impact.In this position, you will:Design and spearhead the development of new platform features that support critical investigations and monitoring processes.Manage services that handle the ingestion, transformation, and delivery of hundreds of terabytes of data, ensuring service-level objectives (SLOs) for latency, freshness, and availability are met.Enhance the scalability, performance, and cost-effectiveness of our data plane and APIs.Elevate quality standards across reliability, security, and compliance for both cloud and on-premises setups.Mentor engineers across various teams and influence the technical strategy beyond your immediate group.Own and improve backend services that drive customer-facing APIs, usage and billing systems, alerting, and data observability.Lead both team and cross-team initiatives from start to finish: discovery, architecture, implementation, rollout, and post-launch analysis.Design event-driven and streaming workflows (e.g., Kafka) with robust data contracts and schema evolution.Promote operational excellence through SLOs, runbooks, on-call duties, incident reviews, and capacity planning for high-query-per-second systems.Collaborate with product, data engineering/science, and security teams to translate customer needs into sustainable systems.We seek candidates who possess:Extensive backend engineering experience in building cloud-hosted services and data pipelines, preferably on AWS or GCP (experience with both is a plus).Strong expertise in APIs, streaming systems, and distributed systems (e.g., microservices on Kubernetes).Proven track record of managing systems at scale (hundreds to thousands of requests per second; terabyte to petabyte data volumes).High level of judgment regarding reliability, security, and cost management, demonstrating measurable improvements.Capability to lead through influence—mentoring, conducting design reviews, and collaborating across teams.

Join Cloudflare as a Senior Solution Engineer, where you will play a key role in driving innovative solutions for our Mid Market customers. If you are passionate about technology and enjoy solving complex challenges, we want to hear from you!

Join Cloudflare as a Senior Solutions Engineer in our Mid-Market division, where you'll leverage your technical expertise and problem-solving skills to deliver exceptional solutions to our clients. In this role, you will engage with customers to understand their needs, design impactful solutions, and facilitate the successful implementation of Cloudflare’s services. Collaborate with cross-functional teams to ensure seamless integration and customer satisfaction.

We are on the lookout for a highly skilled Senior Backend Software Engineer to become an integral part of our dynamic team. In this role, you will collaborate in the design, implementation, and deployment of our core data pipeline and processing platform for our innovative AI-native cloud environment. Your expertise will be pivotal in creating robust, scalable, and sophisticated solutions to tackle intricate cybersecurity challenges. You will take charge of selecting and implementing the essential technologies and architectures needed for success.Key Responsibilities:- Architect, implement, and maintain the foundational data pipelines and processing platform for our AI-native cloud services.- Develop high-quality, scalable, and elegant solutions for complex cybersecurity scenarios.- Evaluate and integrate appropriate technologies and architectures.- Guarantee the scalability, reliability, and performance of our cloud-based offerings.Qualifications:- A minimum of 7 years of experience in backend development.- Proven hands-on experience with cloud architecture and deployment.- Familiarity with a diverse array of cloud technologies and architectural frameworks.- Exceptional software development skills, coupled with a proactive, fast-paced approach to shipping solutions.- Bachelor's degree or equivalent in a relevant discipline.- Strong analytical thinking and communication abilities.About Seven AI:At Seven AI, we welcome professionals at all levels who are passionate about making a significant impact and thriving in a fast-paced, growth-oriented environment. With the rapid advancement of AI technology, this is an exciting time to join us, where your skills can influence the future of cybersecurity. You will engage with cutting-edge technology and spearhead innovative solutions while working alongside industry experts committed to safeguarding against emerging AI-driven threats. Our culture emphasizes respect, collaboration, and a shared dedication to delivering exceptional value to our clients. If you are enthusiastic about building remarkable solutions and desire to be in an environment where your contributions are valued, we would love to hear from you.

About Rune TechnologiesRune Technologies is on a mission to transform military logistics and sustainment through innovative AI-driven solutions. Leveraging elite software expertise from Silicon Valley and extensive operational experience with the Department of Defense, we develop advanced software to tackle the most pressing logistical challenges faced by the U.S. military and its allies. Our flagship product, TyrOS, is a sophisticated software platform designed to enhance logistics management at tactical and operational levels, ensuring comprehensive oversight of inventory, personnel, equipment, and distribution. TyrOS integrates vital information for informed, data-driven decisions, employing AI for decision support, predictive analytics, and optimization at machine speed. Rune’s objective is to empower military logistics and sustainment communities with cutting-edge software tailored for future needs.About the RoleAs a Backend Software Engineer at Rune Technologies, you will play a crucial role in establishing the technology foundation that U.S. and allied forces require to excel in large-scale combat operations. You will be part of a dynamic team engaged in developing advanced logistics algorithms, modern AI-enabled software, and complex system integrations, all aimed at supporting warfighters at the tactical edge.Join us in our commitment to modernizing the sustainment domain with 21st-century software solutions, enhancing inventory management, transportation optimization, and predictive maintenance through state-of-the-art user experiences. Collaborate closely with a team of seasoned engineers, product designers, and operational experts who are dedicated to delivering meaningful real-world impact.Key ResponsibilitiesDesign, implement, and deploy resilient software solutions addressing critical logistics technology challenges for the DoD.Collaborate with team members to enhance TyrOS, our platform that modernizes tactical and operational logistics.Develop and iterate on applications that provide modern, intuitive user experiences for tactical operators.Integrate logistics data from various systems to facilitate real-time visibility, predictive insights, and streamlined workflows.Engage in technical design discussions and code reviews, fostering a culture of excellence, teamwork, and mission focus.Manage and troubleshoot production issues, ensuring high reliability and swift iterations.

At Commure, we are dedicated to transforming the healthcare landscape by simplifying the way care is delivered. Our vision is to elevate the healthcare experience, establishing a new benchmark for efficiency and effectiveness across the industry. Our innovative suite of AI-driven solutions encompasses ambient AI clinical documentation, provider copilots, autonomous coding, revenue cycle management, and beyond. These tools empower both providers and administrators to concentrate on what truly matters: delivering exceptional care.In a healthcare industry valued at $4.5 trillion, with over $500 billion allocated annually to administrative expenditures, Commure is at the forefront of this transformation. Our technology supports more than 500,000 clinicians across diverse care sites nationwide, facilitating over $10 billion in transactions and enabling over 100 million patient interactions. With exciting product launches on the horizon and plans for expansion into new care segments, we aim to transition from an innovative disruptor to the industry standard within the next few years.Commure has recently been recognized in Fortune’s Future 50 list for 2025 and is backed by renowned investors such as General Catalyst, Sequoia, Y Combinator, Lux, Human Capital, 8VC, Greenoaks Capital, Elad Gil, and others. With over 300% year-over-year growth for the past two years, we are just getting started. The moment for AI-powered transformation in healthcare is now, and we are building the technology to drive it forward. Join us in shaping the future of healthcare.About the RoleAs a part of our engineering team at Commure, you will play a pivotal role in revolutionizing healthcare technology by designing and scaling the systems that power our healthcare products. We are seeking a passionate Senior Backend Engineer who thrives on creating user-friendly, responsive, and secure systems that operate reliably at scale. If you enjoy tackling significant challenges in healthcare and have a penchant for rapid delivery, we want you on our team!What You’ll DoArchitect and influence decisions regarding our backend infrastructure for scalable, AI-driven healthcare solutions.Collaborate within a dynamic team that celebrates ambition and swift decision-making.Engage with the entire technology stack, including but not limited to Python, cloud services, and database management.

As a Senior Solutions Engineer specializing in Mid-Enterprise clients at Klaviyo, you will play a pivotal role in driving our customer success and satisfaction. You will collaborate closely with our sales and product teams to design, implement, and optimize integrated solutions that meet the unique needs of our mid-sized business clients. Your expertise in technical analysis, problem-solving, and customer engagement will be crucial in delivering value and ensuring seamless adoption of our solutions.

Join Us at Retell AIRetell AI is revolutionizing the call center industry by leveraging innovative voice AI technology based on first principles.In just 18 months since our inception, we have attracted thousands of companies that rely on Retell's AI voice agents to efficiently manage sales, support, and logistics calls, previously handled by large teams of human agents. Supported by renowned investors such as Y Combinator and Alt Capital, we have rapidly grown from $5M to $36M in Annual Recurring Revenue (ARR) with a dedicated team of 20.Looking ahead to 2026, our ambition is to establish a state-of-the-art customer experience platform entirely powered by AI. We aim to create intelligent AI “workers” capable of serving as frontline agents, quality assurance analysts, and managers, continuously optimizing customer interactions without the need for constant human oversight.We are on an exciting growth trajectory and are seeking driven individuals who are eager to solve complex technical challenges, accelerate progress, and make a significant impact at one of the fastest-growing voice AI startups.Let’s innovate the future together!Ranked as a top 50 AI app by a16z: https://tinyurl.com/5853dt2x#4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on: https://leanaileaderboard.com/