Top Backend Developer Jobs

Lead and mentor engineering teams to design, build, and scale backend services, web applications, and data pipelines. Solve complex cross‑persona problems, implement performant ELT/data integrations, and perform data analysis to investigate and resolve issues, driving engineering best practices and customer‑centric solutions.

The Senior Staff Software Engineer will lead the design and development of GEICO's core billing platform, enhancing scalability and ensuring high-quality delivery. Responsibilities include mentoring engineers, managing technical challenges, and collaborating across teams to achieve strategic objectives.

Own and build backend services that provision, update, and communicate with a global fleet of printers. Design resilient cloud-to-device networking and Linux bring‑up/update systems, drive end-to-end initiatives, participate in on-call/incident response, and provide technical leadership and mentorship across backend, infrastructure, and device teams.

The Senior Backend Software Engineer will own backend projects, design APIs, leverage AWS, and collaborate with teams to build financial products.

The Software Engineer (Backend) will design and develop scalable distributed systems and APIs, enhancing anomaly detection and collaborating across teams.

As a Senior Backend Engineer, you will architect backend features, mentor junior engineers, and enhance systems' performance for multiple web products in a healthtech startup.

The Senior Software Engineer will focus on backend development, collaborating on product features, and improving existing frameworks to impact the community positively.

The Back-End Web & Application Engineer will develop and maintain web applications, manage CMS back-ends, and participate in project planning.

The Senior Software Engineer will develop backend systems, mentor engineers, and collaborate with cross-functional teams while contributing to product features and roadmaps.

The role involves back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

The Senior/Staff Backend Engineer will design scalable backend systems for creator monetization, ensuring transaction integrity and compliance while improving operational resilience and mentoring others.

The Ground Software Engineer will develop and integrate software for lunar mission operations, collaborating with cross-functional teams and ensuring software safety and reliability for spaceflight.

As a Staff Software Engineer focusing on backend, you'll design, implement, and operate micro-services, focusing on large-scale data and AI infrastructure.

As a Senior Backend Engineer, you will enhance Polymarket's CLOB engine by optimizing performance, handling transaction states, and debugging production issues, focusing on concurrency and observability.

Design, build, and maintain scalable, high-performance backend/platform services. Own ClickHouse table design and production operations, troubleshoot performance and ingestion issues, collaborate with product and security teams, participate across SDLC (testing, deployment, production support), and promote engineering best practices and CI/CD-driven DevOps workflows.

Lead backend architecture upgrades and implement AI-native infrastructure for high-QPS recommendation systems. Build safe-production AI agent infrastructure, automate engineering workflows, deliver backend features for product initiatives, and own reliability, observability, and safe rollout practices.

Design, build, test, and ship full‑stack features across React/Next.js frontends and Node.js backend services. Maintain federated GraphQL schemas, real‑time WebSocket data flows, API contracts, system observability, and CI/CD. Troubleshoot cross‑service issues, mentor engineers, and collaborate with QA/DevOps to improve reliability and deprecate legacy systems.

Build and maintain full-stack TypeScript features across React/Next.js front end and Node.js back end. Develop REST and GraphQL APIs, write tests (unit/integration/e2e), debug and resolve defects, participate in Agile processes and code reviews, and monitor performance using observability/logging tools.

Design and develop high-scale applications, integrate systems, manage project priorities, and participate in Agile processes in a collaborative engineering team.

Build and own internal backend products for model evaluation, regression testing, dataset discovery, and agentic context curation. Unify internal data and evaluation systems, enable secure, queryable access to petabyte-scale data across clouds with PII-aware access controls, integrate product usage signals, and harden internal agents for org-wide use.

Participate in all phases of the software lifecycle: requirements, design, development, integration, testing, deployment, and maintenance. Develop backend web services, implement databases and APIs, use containers and cloud platforms, apply automated testing and Agile practices, support system administrators, create training materials, and mentor junior engineers.

Design and implement scalable, resilient backend solutions; re-architect products for serverless/containerized cloud; ensure code quality, security, accessibility and HIPAA compliance; conduct code reviews; support onboarding, POCs, vendor escalations, and respond to technical RFPs.

Develop and maintain back-end systems with emphasis on APIs, processing-intensive analytics, real-time systems, and large data sets. Review and test software components, resolve defects, contribute to system design (hardware/software trade-offs, reuse, COTS/GOTS), and perform requirements analysis and documentation.

Build and own backend features end-to-end for the Agents Channel, writing clean, testable server-side code (Kotlin/Java). Collaborate with product, marketing, and frontend teams, work in cloud environments (AWS preferred), use relational databases/SQL, CI/CD, and leverage AI/LLM tools to improve developer productivity.

Design, architect, build, and scale reliable backend systems operating at Internet scale. Develop distributed, event-driven applications; design RESTful APIs and NoSQL data solutions; deploy cloud and serverless applications; containerize services; and establish CI/CD pipelines. The role emphasizes software development best practices, testing, clean architecture, reliability, scalability, and potential Open-Source Intelligence community experience.