Top Backend Developer Jobs

Build and maintain backend services, REST APIs, cloud workspace provisioning systems, and resource orchestration infrastructure. Improve performance, reliability, scalability, and security while developing integrations, SDKs, and developer tools. Contribute to architecture and ship features from concept to production. The role requires strong TypeScript, JavaScript, and Node.js skills, backend and database knowledge, and familiarity with Docker, Linux, and cloud infrastructure.

Develop and maintain scalable backend services, collaborate on feature development, lead and mentor junior developers, ensure code quality and automation, and troubleshoot production issues in a fintech startup environment.

Develop, test, integrate, verify, and deploy safety-critical ground software for lunar mission operations. Responsibilities include mission-control systems, telemetry processing, spacecraft monitoring, fault detection, system integration, simulations, deployment, documentation, and operator training support. The role collaborates across spacecraft, infrastructure, and operations teams while maintaining software safety, reliability, and certification standards.

Develop and maintain cloud-native platform services, backend applications, APIs, integrations, and microservices. Build identity, authentication, and access-management capabilities using secure software practices. Collaborate with architects, engineers, and product stakeholders to troubleshoot issues, improve performance, and deliver scalable enterprise solutions. The role also involves CI/CD, cloud infrastructure, containerization, continuous platform improvements, and applying generative AI tools to enhance productivity.

Lead backend engineering for a video platform that uses generative AI to create cinematic real estate walkthroughs. Design scalable GraphQL services, data models, asynchronous video-generation pipelines, and reliable cloud infrastructure. Guide architecture, prototype emerging AI technologies, mentor engineers, and collaborate with product, design, and analytics teams. The role requires strong Java, Python, Spring Boot, GraphQL, SQL, AWS, distributed systems, observability, and system design expertise.

Design, deploy, and optimize Philo’s distributed video streaming infrastructure, including ingest, transcoding, packaging, delivery, RESTful services, analytics pipelines, DRM, and ad insertion. Improve platform reliability, performance, latency, security, video quality, and cost efficiency. Collaborate with content partners and internal video, advertising, client, and data teams while supporting streaming quality across new platforms. The role also involves architectural ownership, cloud operations, and mentoring.

Build and operate backend APIs, services, integrations, and cloud infrastructure powering patient applications, clinical workflows, and AI agents. Integrate electronic medical records and healthcare systems, ensure security and reliability for sensitive patient data, and collaborate with product, clinical, and AI teams. The role includes architectural ownership, production operations, tooling improvements, and hiring or mentoring engineers in an early-stage startup.

Design, deliver, and operate scalable .NET Core backend services and APIs for an AI-driven advertising platform. Lead technical design, improve reliability and observability, conduct post-mortems, review code, mentor engineers, document architecture, and collaborate with Product and Engineering leadership. The role focuses on distributed systems, high-throughput workloads, partner integrations, performance, security, and platform growth.

Develop and maintain Ruby on Rails backend systems supporting solar development, value evaluation, and loan servicing. Responsibilities include writing and reviewing code, maintaining CI/CD pipelines, solving complex domain problems, collaborating with Product and company experts, shaping architecture and technical direction, and improving engineering processes as the company scales.

Develop and lead cloud-based full-stack and backend systems using microservices, APIs, databases, container orchestration, and public cloud platforms. Provide technical leadership across Agile teams, define service architecture, improve performance and resilience, reduce technical debt, establish engineering standards, mentor developers, and evaluate emerging technologies. The role focuses on foundational cloud infrastructure, observability, connectivity, availability, and operational excellence.

Design and maintain a high-performance Go and PostgreSQL document-rendering microservice at scale. Modernize a Ruby on Rails monolith into modular services, define architectural standards, improve reliability and observability, and lead testing, debugging, documentation, and root-cause analysis. Collaborate with infrastructure, DevOps, product, and architecture teams on deployment and automation while mentoring engineers and influencing technical direction.

Design and maintain scalable backend systems in a distributed microservices architecture. Build RESTful APIs, integrate third-party vendors, optimize SQL and NoSQL databases, and implement messaging, observability, CI/CD, and cloud infrastructure practices. Lead engineering initiatives from requirements through delivery, contribute to technical strategy, document systems, and improve reliability, performance, and scalability across user-facing applications.

Build and ship healthcare software across the frontend, APIs, and databases. Own features end to end, write tested and maintainable code, prototype with patients and care teams, and use AI tools such as Cursor and Claude Code in daily development. Design scalable systems, improve performance, accessibility, and reliability, and contribute to trustworthy automation in a fast-paced startup environment.

Develop and operate cloud backend systems using AWS services, Java, Python, Terraform, Cassandra, and data engineering technologies. Responsibilities include system design, application development, testing, distributed systems, microservices, APIs, containers, CI/CD, resiliency, security, and operational stability. The role is onsite in Jersey City and requires local candidates for interviews.

Design, develop, test, deploy, and support backend applications using Java or Python in AWS. Build APIs, microservices, and cloud solutions; manage infrastructure with Terraform; work with databases; improve security, reliability, performance, testing, and CI/CD. Troubleshoot production issues, conduct root-cause analysis, document technical decisions, and collaborate with product, QA, SRE, security, and engineering teams.

Build and operate reliable backend services and financial systems supporting billing, payments, payer integrations, and revenue workflows. Design APIs, data models, durable workflows, and observability practices while ensuring correctness, security, and scalability. Collaborate cross-functionally, support production systems through on-call rotations, mentor engineers, improve developer tooling, and integrate AI technologies into engineering and operational processes.

Own the backend platform powering Vibecoderz, designing FastAPI microservices, Firestore schemas, Neo4j integrations, asynchronous workflows, secure APIs, and scalable Cloud Run deployments. Integrate Stripe and SendGrid, build CI/CD and automated tests, implement observability, and optimize services for 100K+ concurrent learners with sub-100ms latency. Collaborate with frontend, AI, DevOps, and product teams on system contracts, architecture, reliability, and performance.

Design, implement, and optimize low-level systems software, networking components, protocols, and performance-critical applications. Develop client-server and socket-based systems using C++ and Python, apply algorithms and memory management techniques, and build comprehensive tests. Debug memory leaks, packet flow, and concurrent execution using GDB and Wireshark. Collaborate with cross-functional teams on modular codebases, technical documentation, code reviews, and release-cycle version control.

Own and evolve a high-traffic catalog API for satellite imagery. Design backend services and data pipelines in Python, optimize PostgreSQL performance over large geospatial datasets, operate cloud infrastructure, and deliver reliable deployments with automated testing. The role offers significant architectural ownership on a small, autonomous team and involves geospatial standards, scalable services, and production modernization.

Lead end-to-end design, development, and delivery of enterprise Generative AI and ML solutions. Architect scalable LLM, RAG, and agent-based systems, drive technical decisions, implement production-ready MLOps/CI-CD, and mentor engineers. Collaborate with product and business stakeholders, ensure monitoring, security, and operational support, and evaluate emerging AI technologies to improve delivery.

Build and improve backend product capabilities for data cataloging, agent benchmarking, and workflow automation. Own features from user problem definition through design, implementation, launch, and production support. Develop APIs, services, data models, and workflow systems; investigate performance and production issues; contribute to architecture and code quality; and collaborate with Product, Design, and Engineering. The role is hybrid, requiring at least three days weekly in San Francisco or New York City.

Lead backend engineering strategy for Affirm’s international Identity team. Design and launch highly available distributed systems supporting KYC, user lifecycle management, and identity decisioning. Drive technical planning, cross-functional collaboration, operational excellence, monitoring, testing, and on-call readiness. Establish engineering quality standards, influence architecture, mentor team members, and deliver scalable systems using Python or Kotlin, AWS, MySQL, Spark, and Kubernetes.

Lead the architecture and delivery of Patreon's large-scale live video platform, covering ingest, transcoding, packaging, delivery, playback, backend services, and APIs. Improve latency, quality, reliability, observability, and scalability across web and mobile. Evaluate video vendors, operate cloud-native systems, manage incidents and capacity planning, shape the technical roadmap, and mentor engineers.

Designs, develops, tests, and maintains scalable, secure systems using Java or Python; applies enterprise AI-assisted coding tools; contributes to architecture, data-driven improvements, CI/CD, and resilient production delivery within agile teams.

Design, develop, test, and maintain scalable, secure systems using Java or Python. Contribute to architecture, SDLC practices, CI/CD, automated testing, and data-driven improvements. Use enterprise-authorized AI-assisted development tools responsibly, validate outputs, and support cross-team collaboration and inclusion.