Top Full-Stack Engineer Jobs in Los Angeles, CA

In this role, you will build full stack features for a telemetry data platform, create user interfaces, implement APIs, and write maintainable code while collaborating with teams.

Build and maintain full stack features for telemetry data, create user interfaces, implement APIs, and collaborate with teams on design and coding.

Develop and debug production-grade full-stack applications across front-end and back-end systems. Build features, APIs, databases, and data models; troubleshoot end-to-end issues; analyze unfamiliar codebases; translate implementations across programming languages; and review AI-generated and developer-written code for correctness, security, scalability, performance, and maintainability.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Build and maintain data-intensive, interactive web products across the full stack. Architect and implement API and frontend features, validate FastAPI responses with Pydantic, access Postgres via SQLAlchemy, optimize performance and scalability, implement testing and QA, participate in code reviews, refine UX, and help define engineering processes at an early-stage company.

Design, build, and maintain cross-platform mobile applications and end-to-end web features. Implement front-end interfaces, back-end services and RESTful APIs, optimize databases, write tests and documentation, perform code reviews, and collaborate with UX, QA, and DevOps to deliver high-quality, secure, and performant solutions.

Develop firmware, backend systems, and tooling for cellular IoT devices. Responsibilities include C development for STM32 microcontrollers, embedded AI integration, cellular communication, low-power optimization, device debugging and validation, and backend development with Python and Ruby on Rails. The role collaborates with hardware, electronics, and manufacturing teams and requires independently leading complex development initiatives.

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

Own full-stack modernization of complex legacy systems for a federal client. Responsibilities include analyzing workflows, designing scalable applications, developing Java and Spring Boot backend services, building React front ends, implementing APIs and integrations, supporting the full SDLC, troubleshooting across application layers, and collaborating with technical and non-technical stakeholders. The role is fully remote and requires U.S. citizenship with the ability to obtain and maintain Public Trust clearance.

Build and operate secure, scalable full-stack identity and authentication systems using ReactJS, TypeScript, Java, and Node.js. Own features end to end, troubleshoot distributed systems, improve reliability, and lead AI-assisted development workflows using structured specifications and prompt engineering. Collaborate with product, design, security, and engineering teams while evaluating AI-generated code for quality, security, performance, and test coverage.

Design, implement, and optimize full-stack solutions. Collaborate with cross-functional teams, participate in code reviews, analyze and improve system performance, and stay current with industry technologies.

Develop and enhance full-stack web applications for CDMRP, including portal integrations, single sign-on, microservices, responsive front-end and back-end features, REST APIs, testing, performance optimization, and legacy modernization. Collaborate with portal, systems administration, and security teams; apply UX practices; document architectures and services; and ensure compliance with DoD security procedures and STIG guidelines.

Develop and deploy responsive full-stack web applications from design through production. Translate product requirements into high-quality software, maintain pixel-perfect design standards, collaborate with product, design, and QA, and help guide technology strategy. The role acts as a technical lead on product initiatives and reports to the CTO, with a focus on AI-native development and secure fintech workflows.

Leads the design, development, and implementation of full-stack applications using C#, .NET, Angular, Azure, and SQL Server. Collaborates with cross-functional teams, ensures application security, performance, and scalability, applies Git-based version control practices, mentors developers, and stays current with emerging technologies.

Develop and test scalable front-end features, backend services, and integrations for mobile and ecommerce platforms. Maintain production-ready code, databases, and data models while translating business requirements into technical solutions. Collaborate with product, design, and engineering teams in an Agile environment, participate in sprint ceremonies, and independently manage development tasks.

Build end-to-end features in a JS/TS stack, designing scalable backend services and responsive real-time frontends. Improve observability, performance, and reliability, collaborate with product/design, and own full-stack implementation from APIs and data models to UI.

Develop and operate authentication, authorization, and identity-provider services for APIs, customer products, and internal tools. Build Go backend services, gRPC/REST APIs, shared libraries, and React/TypeScript interfaces, with occasional Java work. Own services end to end, including data modeling, deployments, monitoring, troubleshooting, integrations, testing, incident response, and on-call support.

Build and maintain Django-based web applications, design RESTful APIs, implement frontend features (HTML/CSS/JS), optimize performance and security, collaborate with cross-functional teams throughout the development lifecycle.

Build and maintain scalable full-stack systems, backend services, distributed systems, and APIs powering LaunchDarkly’s AgentControl product. Develop primarily with Go, Python, and TypeScript while working with AWS, CockroachDB, Datadog, DeepEval, and FastAPI. Responsibilities include architecture, performance optimization, reliability, production ownership, on-call support, design collaboration, mentoring, and developing AI and GenAI workflows.

Build and operate a new full-stack fleet payments and expense management platform. Responsibilities include architecture, backend services, APIs, web and mobile capabilities, payment workflows, partner integrations, testing, observability, security, production readiness, and continuous improvement. The role collaborates with product, design, security, and distributed engineering teams while mentoring engineers and establishing scalable development practices.

Develop and maintain a large-scale production web application across UI and API tiers. Responsibilities include implementing frontend enhancements, fixing bugs, improving accessibility and performance, developing Python-based APIs, supporting third-party integrations and batch processing, enhancing search and administrative features, migrating legacy data, and ensuring application scalability, security, and reliability across multiple releases.

Build and own user-facing features and core platform architecture across frontend, backend, and ML pipelines. Integrate AI workflows (LLMs, embeddings) for curriculum generation and automated evaluation. Manage end-to-end development: requirements, design, implementation, CI/CD, testing, observability, and iteration while collaborating with product, design, ML, and customer teams.

Own end-to-end product features for a SaaS platform serving HR, therapists, and employees. Build, scale, and evolve frontend and backend components, lead architecture and standards, collaborate with design and product, and incorporate customer feedback and QA. Work in an early-stage startup environment with product-focused ownership.

Develops secure, scalable full-stack software for satellite ground communications and data transport. Responsibilities include building Python backend services and APIs, TypeScript front-end applications, microservices, cloud platforms, authentication systems, databases, and containerized deployments. The role translates requirements into technical designs, collaborates with MBSE and test teams, supports integrations, resolves production issues, and ensures reliable, compliant mission-critical performance.

Develops full-stack software for secure satellite communications and ground systems. Responsibilities include building Python backend services and PostgreSQL databases, implementing microservices and OAuth/JWT security, supporting TypeScript frontend development, and deploying containerized applications with Docker, Kubernetes, and Helm. The role also involves Agile collaboration, code reviews, production troubleshooting, integration support, and work with MBSE and test engineering teams.