Top Backend Developer Jobs

Lead backend and full-stack work on the Payments team, building multi-gateway integrations (Stripe, PayPal), payment APIs, and customer payment UIs. Ensure secure, compliant (PCI-DSS) payment flows, reliability, observability, and scalability across AWS/Kubernetes microservices. Partner cross-functionally to design architecture, implement settlement/reconciliation, and maintain high availability.

Build and maintain backend services and APIs powering LangSmith’s AI observability, tracing, monitoring, and evaluation workflows. Responsibilities include architectural design, high-volume data storage and query optimization, reliability engineering, testing, monitoring, alerting, production troubleshooting, root-cause analysis, documentation, and cross-functional feature delivery.

Design and build automation tools, dashboards, and systems to deploy and manage cloud-based infrastructure. Collaborate with cross-functional teams to analyze requirements, implement reliable full-stack solutions (React front-end, Go back-end), improve CI/CD pipelines, and maintain production stability while meeting government background/clearance requirements.

Design and build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

Lead technical strategy and execution for a backend ledger team building highly available, audit-grade financial systems. Drive architecture, reliability, monitoring, on-call practices, code quality, cross-functional collaboration, and mentoring to ensure accurate, scalable ledger operations.

Design, build, and scale backend systems and microservices for automated chargeback and dispute workflows. Integrate with card networks, banks, and merchants, improve CI/CD, upgrade platform architecture, and own feature delivery and system optimizations.

Own and improve the data foundation for Radar's geocoding platform: model and serve location data, build large-scale ingestion and integration pipelines, improve coverage and quality, apply LLMs/agents for enrichment and labeling, work across Scala/Python/Rust and the Node.js API, operate systems at very high throughput, and engage with customers to inform product decisions.

Build and maintain backend systems for a trading platform, including brokerage integrations, API clients, authentication, webhooks, data synchronization, and resilient distributed workflows. The role involves handling retries, rate limits, duplicate events, partial failures, monitoring, reconciliation, and reliability improvements while collaborating with product and engineering teams.

Design, build, and maintain cloud infrastructure and backend systems for a trading platform. Improve deployment pipelines, developer tooling, observability, distributed systems, database performance, incident response, and recovery. Collaborate with engineering, product, and cross-functional teams to deliver secure, reliable, scalable solutions in a hands-on startup environment.

Build and maintain scalable backend services and APIs for a trading platform. Own customer-facing features and a pilot portal, including API contracts, data models, business logic, persistence, testing, releases, and iteration. Collaborate with frontend, product, founders, and cross-functional teams while contributing hands-on technical leadership in a fast-paced fintech startup.

Design, build, and maintain Python backend services and internal APIs for high-traffic hosting platforms. Administer Linux production systems, optimize MySQL queries and schemas, troubleshoot incidents, and participate in on-call rotation. Collaborate with senior engineers and cross-functional teams to deliver tested features, modernize legacy Perl systems, and contribute to technical design decisions. Apply AI responsibly throughout development, debugging, testing, and code review.

Lead the architecture, development, deployment, and reliability of scalable APIs for Afresh’s flagship AI ordering product. Partner with product, account management, and engineering teams to deliver integrated solutions, support the existing iPad application, and shape future product direction. Drive projects from conception through launch, enforce testing and release best practices, mentor junior engineers, participate in Agile ceremonies, and provide constructive code reviews.

Lead the design and development of Neurelo's architectural vision with a focus on Rust, building scalable, reliable systems and collaborating effectively across teams.

Backend software engineering internship focused on owning projects, writing reliable and tested code, participating in code reviews, refactoring, and supporting continuous integration and deployment. Interns collaborate with experienced engineers and contribute to user-facing Lyft products. The role requires strong computer science fundamentals, database experience, familiarity with real-time technology and mobile development, and availability for a Summer 2027 hybrid internship in San Francisco.

Designs, builds, and maintains backend APIs and data pipelines supporting clinical workflows and real-time data exchange. Drives platform architecture, code quality, testing, reliability, data integrity, compliance, and inspection readiness. Collaborates with product, design, machine learning, infrastructure, clinical, QA, and regulatory teams while mentoring engineers and contributing to a SaaS healthcare platform.

Develop and maintain large-scale distributed backend components for a cloud security platform. Responsibilities include end-to-end software development, architectural decision-making, design and code reviews, scalability and stability improvements, monitoring, and collaboration with frontend and DevOps teams. The role focuses on building secure, efficient, and maintainable systems across a multi-cloud environment.

Design, build, and scale backend microservices and APIs for high-volume financial and transactional systems. Implement secure integrations with payment processors and banks, develop data-driven account and transaction services, ensure data integrity and performance, and collaborate cross-functionally to deliver production-grade fintech features with strong development practices.

Design, build, and maintain scalable backend services and infrastructure for Roadie’s logistics platform. Identify performance bottlenecks, improve reliability, collaborate with Product, Data Science, and engineering teams, contribute to code reviews and technical practices, and own projects from concept through production.

Lead backend engineering initiatives focused on secure, scalable, and reliable distributed systems. Design identity and access management capabilities, strengthen AWS infrastructure, optimize databases, harden APIs and services, improve observability, and drive incident remediation. Mentor engineers, own cross-service problems end to end, and partner with security teams to deliver durable solutions across customer-facing applications and platforms.

Lead backend engineering initiatives focused on secure, scalable, and reliable distributed systems. Design identity and access management capabilities, strengthen AWS infrastructure, optimize high-volume databases, harden APIs, improve observability, and drive incident remediation. Mentor engineers, own cross-service problems end to end, collaborate with security leadership, and build performant customer-facing applications.

Own and evolve scalable backend systems and infrastructure powering educational products. Build end-to-end features, design APIs, operate production systems, improve observability and CI/CD, support reliability and incident response, and provide technical leadership through architecture discussions, code reviews, and mentorship. The role requires close collaboration with product and design teams, comfort with ambiguity, and occasional full-stack contribution.

Own and lead backend engineering initiatives for financial platforms, designing scalable Java and Ruby distributed services, Kafka data streams, PostgreSQL databases, AI-enabled features, and React components. The role includes production operations, observability, testing, and collaboration with product, architecture, and engineering teams to deliver resilient software.

Build and scale Mintlify’s backend systems, APIs, content pipelines, and AI infrastructure. Responsibilities include designing services for the editor, dashboard, and documentation sites; ingesting, validating, transforming, and publishing customer content; developing search, retrieval, and agent capabilities; and improving caching, queues, databases, performance, reliability, and observability. The role also contributes to product direction, technical decisions, customer insights, and end-to-end feature delivery.

Build and maintain backend services, APIs, and integration layers for a modular ecommerce platform. Integrate personalization, semantic and LLM search, DAM, PIM, SAP/HANA, ERP, analytics, and customer data systems. Use AI coding agents throughout development while validating code quality, security, performance, and reliability. Design scalable APIs, automated testing, observability, and reusable architecture while collaborating with internal teams, vendors, and implementation partners.

Lead application development and systems analysis for complex technology initiatives. Design and implement Java-based applications and microservices using Spring Boot, event-driven architecture, REST/SOAP services, Kafka, Docker, and SQL. Establish coding, testing, debugging, and implementation standards; evaluate complex business and system processes; ensure architectural alignment and regulatory compliance; and advise or coach mid-level developers and analysts.