Top Backend Developer Jobs

As a Senior Backend Engineer, you will design scalable solutions, own products, lead technical architecture, and contribute to key engineering projects.

Build and scale backend infrastructure and systems powering real-time AI agents. Work across data pipelines, analytics, and real-time systems; own end-to-end design, implementation, and iteration. Drive initiatives like ClickHouse analytics migration, hallucination detection, and scaling browser-use agents.

Own and improve core backend systems for perpetual futures: build and optimize low-latency matching engine, ensure correct order state and backpressure, instrument observability, optimize runtime performance, and lead production incident response to raise reliability and throughput.

The Staff Software Engineer - Backend will design and build core backend systems, optimize performance, lead initiatives, and mentor team members in a remote-friendly role.

The Senior Software Engineer - Backend will design and build scalable backend systems for fantasy sports, enhance performance, and collaborate with cross-functional teams to optimize solutions for millions of users.

The Software Engineer - Backend will design and build core systems for fantasy sports games, optimizing performance and collaborating cross-functionally to enhance user experience.

Build and ship production AI features (LLM agents, tool/function calling, RAG pipelines) and reliable backend services. Implement observability, tests, rollback/fallbacks, and evaluation to keep models grounded, safe, and cost-effective. Collaborate with product, design, and GTM; run experiments and raise engineering standards.

The Backend Engineer will develop infrastructure for product integration, create documentation for team training, and influence technology decisions.

Design, build, and operate backend services and APIs for an affiliate platform, ensuring reliability, performance, and security while managing financial transactions and partner integrations.

Build and maintain backend APIs and data pipelines that ingest and process large-scale construction data (360° video, schedules, IoT). Optimize storage and query performance using DuckDB and PostgreSQL, extend Airflow workflows, integrate Wasm for local computation, monitor data quality, and collaborate with frontend, CV, and ML teams to deploy production models and analytics.

Design, build, and maintain high-performance, scalable Java backend services and microservices for Walmart's catalog platform. Troubleshoot production issues, perform root-cause analysis, mentor junior engineers, work in agile teams, and contribute to cross-functional projects while leveraging cloud, CI/CD, NoSQL, and generative AI/ML technologies.

Own the technical direction of a core Helius backend system, including architecture, reliability, performance, roadmap, and production operations. Design scalable distributed systems, storage, streaming, or edge infrastructure; drive profiling and performance improvements; establish operational excellence; partner with founders on strategy; mentor engineers; and lead ambiguous cross-team initiatives.

Own and advance a core Helius backend system supporting Solana infrastructure. Design and release high-performance products, optimize latency and throughput, make architectural decisions, improve observability and incident response, and mentor engineers. The role requires end-to-end ownership of production systems at scale, with close collaboration with founders and engineering leadership. Relevant systems include data streaming, historical APIs, account indexing, and access control infrastructure.

Leads the architecture, design, implementation, testing, and delivery of backend software for Slate’s digital customer experience. Owns code quality, system reliability, functional and integration testing, and technical decision-making. Collaborates with UX and product teams, leads code and design reviews, simplifies complex solutions, and mentors engineers while supporting career development.

Lead architecture and delivery of high-throughput transactional platforms and agentic AI applications. Build Python and Go services, govern AWS infrastructure, establish engineering standards, optimize distributed systems, and lead technical design reviews. Develop multi-agent workflows, tool-calling integrations, RAG pipelines, and LLM applications. Mentor engineers, guide technology evaluations, improve observability and CI/CD, and participate in incident response and reliability initiatives.

Lead design and implementation of backend services for payments, billing, ledgers, settlements, and reconciliation. Drive architecture, integrate with external payment and banking partners, ensure financial accuracy, security, compliance, scalability, and operate mission-critical production services.

Build and operate distributed, event-driven backend services for Stacklet’s cloud governance platform. Responsibilities include developing GraphQL APIs, policy execution pipelines, cloud asset and cost data stores, and scalable multi-cloud systems. The role requires designing for reliability, observability, retries, idempotency, and eventual consistency; managing PostgreSQL schemas and migrations; and using AWS serverless services, infrastructure as code, CI/CD, and automated testing. The engineer will also lead backend initiatives, mentor teammates, and contribute to architectural decisions.

Design and build developer platforms, backend tooling, SDKs, test infrastructure, reusable components, evaluation frameworks, and AI-assisted engineering workflows. Own architecture across distributed systems, observability, governance, reliability, and developer productivity. Influence technical strategy across teams, establish engineering standards, mentor senior engineers, and drive multi-quarter platform investments. The role is hands-on and focused on enabling backend, mobile, ML, and web teams to deliver reliable software faster.

Senior Software Engineer joining Fetch’s Data Platform team to architect and evolve scalable data pipelines, governed data access, delivery infrastructure, and partner integrations. The role owns ambiguous technical problems, leads multi-system initiatives and migrations, improves reliability and engineering efficiency, shapes technical direction, collaborates across teams, and mentors engineers. Candidates need strong backend or platform engineering experience, data infrastructure knowledge, cross-team leadership, operational judgment, and excellent communication skills.

Design, develop, and maintain Java-based backend services and APIs for KeeperApp. Own backend components, optimize MySQL schemas/queries, ensure performance and reliability, apply secure coding practices, participate in code reviews, and collaborate with product and engineering teams to deliver features iteratively.

Develop secure, scalable backend APIs and microservices for mission-focused applications. Responsibilities include managing data persistence, integrating relational databases, automating builds and integrations, implementing authentication and authorization, supporting cloud-native architectures, and applying modern version control and Agile practices. Preferred experience includes AWS, Docker, Kubernetes, observability tools, and caching technologies.

Design, build, and scale payments infrastructure for deposits, withdrawals, and settlement. Lead migrations from monoliths to distributed services, integrate with payment processors and banking rails, ship regulated features (KYC/EDD, fraud, reconciliation), own production on-call for money-movement systems, mentor engineers, and collaborate cross-functionally with Product, Compliance, and Design.

Own and evolve core domain APIs and data models powering the consumer product. Build gRPC/Connect services and real-time streaming systems, consolidate fragmented services into reusable primitives, ship end-user features with product teams, and balance technical debt with fast delivery under tight deadlines.

Design, build, and own web and mobile applications and backend infrastructure. Implement APIs, database schemas, and scalable microservices. Integrate and productize ML/DL models, leverage code-generation tools, and collaborate with design, data science, and aviation experts to deliver production-ready SaaS features.

Develop and maintain Java-based backend applications using J2EE, the Spring Framework, and SOAP web services. This is a six-month contract position based in San Jose, California.