Top Backend Engineer Jobs in Los Angeles, CA

Design, implement, and operate scalable ads delivery backend services. Own serving-time systems, collaborate with Product/ML/Infra, ensure availability and efficiency, use observability and automation, and apply AI-assisted workflows to ship production-quality code and optimize platform architecture.

Design, build, and optimize scalable backend services, APIs, and data pipelines. Integrate with third-party billing/commerce systems, maintain serverless/event-driven architectures on AWS, ensure security and performance, implement automated tests and CI/CD, mentor engineers, and drive architectural decisions.

Build and maintain scalable backend services, RESTful and GraphQL APIs, database schemas, and cloud infrastructure. Own architecture decisions, optimize performance and reliability, improve CI/CD practices, collaborate across product and engineering teams, lead architecture sessions, review code, and mentor junior developers.

The Back-end Engineer will develop and maintain services and APIs, design data models, and contribute to system stability, collaborating with other engineers and product managers.

Design and build robust backend services and secure APIs for finance and reader applications. Implement authentication, payments, subscriptions, and finance workflows. Design Postgres/Redis schemas, integrate with financial APIs (BSE Star MF, NSE) and DRM services, and ensure compliance-friendly data handling.

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.

Build and scale secure, reliable backend services and web applications. Develop identity and access management features, improve AWS infrastructure and database performance, harden APIs and distributed systems, and contribute to incident response and observability. Own engineering problems from design through production, partner with security teams on remediation, mentor engineers, and solve complex workflow and scalability challenges.

Build and maintain backend services and APIs, write unit tests, debug and optimize systems, support migration from Supabase to cloud, improve reliability, and integrate AI/RPA workflows while learning under senior mentorship.

Design, build, test, and support EPIC integration solutions across the full interface lifecycle. Gather requirements, resolve integration issues, develop standards and documentation, and provide production support within a remote, volunteer, part-time setup.

Design, build, test, and maintain backend services and APIs powering the insurance platform. Integrate payments, documents, and data providers, improve system stability, performance, and scalability, mentor team members, and participate in architectural decisions and agile ceremonies.

As a Senior Backend Engineer at DuckDuckGo, you'll lead backend projects, mentor engineers, and develop AI-enhanced features for the company's privacy-centric product line.

Design and implement secure, scalable backend services for speech inference and audio processing. Optimize networking, transcoding, latency, memory, and distributed compute orchestration. Measure and improve system performance, debug complex networking/scheduling/HPC issues, customize services for customers, and partner with Product to deliver features end-to-end.

Design, build, and operate payment services for card processing, refunds, reconciliation, and processor integrations. Develop scalable Kotlin and Java Spring Boot APIs, optimize PostgreSQL schemas and SQL, and implement idempotency, retries, webhooks, audit trails, and reconciliation. Respond to payment incidents, conduct root cause analysis, collaborate cross-functionally, review architecture and code, and mentor engineers. The role requires strong distributed-systems, payments, PCI DSS, debugging, and production operations experience.

Build and operate scalable backend services for connected devices, including device connectivity, telemetry ingestion, health monitoring, command and control, and data pipelines. Collaborate with firmware, mobile, and product teams on APIs and workflows. Use AWS, microservices, streaming systems, observability tools, and AI coding agents to deliver reliable features, participate in incident response, and improve automation and engineering practices.

Build and operate reliable backend services for a developer-focused email platform. Responsibilities include owning features end-to-end, designing APIs and relational data models, scaling databases, building distributed systems with queues and background workers, managing AWS infrastructure, improving observability and deployments, participating in on-call, and partnering with customers and support to improve the product.

The Backend Engineer will build and maintain Resend's email transport infrastructure, focusing on SMTP delivery, routing, and system design for high-volume email sending. They will ensure the reliability and observability of the systems while participating in incident response.

Develop backend blockchain functionality for Cardax DEX on the Cardano blockchain. Write and maintain smart contracts in Plutarch and Haskell that define the constraints and conditions for decentralized token exchange without a central entity.

Lead the architecture, design, and development of complex backend software systems for data-intensive applications. Drive technical direction, implement new technologies, improve code quality, reduce technical debt, and promote testing and continuous delivery. Mentor engineers, conduct code reviews, collaborate cross-functionally with product and design teams, engage with customers, and help deliver maintainable, scalable solutions using backend technologies, databases, distributed computing, and cloud platforms.

Design, build, operate, and maintain high-scale distributed telemetry systems for Grafana Mimir. Deliver features from concept through production, improve reliability and performance, review code and designs, manage releases, collaborate across the squad, contribute to open-source projects, and participate in follow-the-sun on-call rotations. The role involves cloud software development, microservices, observability, DevOps practices, and database query optimization.

Designs, builds, and supports scalable Java and Spring Boot microservices on GCP. Responsibilities include SQL and data pipeline development, CI/CD with Jenkins, infrastructure automation using Terraform, comprehensive JUnit testing, code reviews, agile tracking, production incident resolution, and root-cause analysis. The role collaborates with product, architecture, and cloud engineering teams while mentoring peers and improving engineering standards. Remote work is available, with less than 10% travel and a requirement to obtain and maintain Public Trust.

Build and evolve Restate’s durable execution runtime, focusing on distributed systems, state management, storage, messaging, concurrency, fault tolerance, performance, and reliability. Design, test, operate, and improve production-scale backend infrastructure; diagnose complex systems issues; develop integrations and tooling; collaborate with production users; and contribute to architecture, observability, documentation, and engineering practices.

Set technical direction for distributed messaging systems handling billions of messages daily. Make architecture decisions balancing scale, cost, and reliability; solve ambiguous cross-team problems; establish engineering standards; mentor senior engineers; improve processes and tooling; assess candidates; and use AI agents for multi-file software changes.

Design, build, maintain, and improve backend services and APIs supporting real-time translation. Own complex features from technical design through delivery, work with distributed systems, messaging, event streaming, caches, and NoSQL stores, and resolve production issues. Write comprehensive tests, participate in design and code reviews, improve reliability and maintainability, collaborate cross-functionally, and use AI-assisted development tools responsibly.

The Staff Software Engineer will lead technical strategy, ensure system availability, and develop backend systems at scale, collaborating across teams to drive capacity modeling and operational quality.

Build end-to-end product features with a backend focus: schema and API design, UI work in React/TypeScript, GCP/Terraform infrastructure, CI/CD, DB performance tuning, production ownership, and product decision-making using AI coding tools.