Top Full-Stack Engineer Jobs in Los Angeles, CA

Lead design, build, and deploy full-stack software for DoD/IC missions. Rapidly prototype MVPs, integrate systems and APIs, deliver high-performance frontends, collaborate with users, and deploy/test in secure operational environments.

As a Fullstack Engineer, you'll design, build, and operate web applications, collaborating with product teams and mentoring peers while ensuring best practices in coding and system architecture.

The Full Stack Engineer will develop scalable back-end systems, design RESTful APIs, manage databases, and ensure front-end integration, focusing on a creator-centric platform.

As a Junior Full Stack Engineer, you will contribute to feature development, implement UI components, support backend endpoints, and improve performance while learning from senior engineers.

The Senior Software Engineer will develop applications for planning and scheduling in a rocket factory, following agile practices and collaborating with users on system requirements and solutions.

Design, scope, and implement scalable full‑stack ecommerce solutions. Improve platform performance and usability, collaborate with Product and Design, run experiments, ship features, and ensure seamless integration across the product ecosystem.

The Senior Software Engineer will design, develop, and optimize scalable PHP APIs and web applications, collaborating with product and design teams to support product development and implement best coding practices.

Support full‑stack development: write high‑quality, well‑tested code, build and improve component library, propose prototypes, collaborate with QA and cross‑functional stakeholders.

Build and maintain scalable applications, APIs, and services for millions of users. Deliver customer-facing features from concept to production, collaborate with product and design, pair with teammates, follow engineering best practices, and work across backend services and React-based web applications.

As a Fullstack Software Engineer, you'll design, develop, and maintain scalable frontend and backend systems while collaborating across teams.

Develop core services using Golang and PostgreSQL, resolve issues, write tests, and collaborate with cross-functional teams to enhance the pre-sales module for life insurance offerings.

Lead and deliver software solutions, oversee full-stack architecture, mentor engineers, and drive cross-functional initiatives for spacecraft modeling and control platforms.

Fullstack engineers will develop frontend applications and contribute to the backend, focusing on UI/UX and geospatial functionalities.

The Fullstack Engineer will design and implement integration solutions for healthcare systems, collaborating across teams and ensuring compliance with standards like HIPAA. Responsibilities include troubleshooting, mentoring junior engineers, and driving best practices in integration development.

Lead design and build of an AI-native marketing platform: integrations, multi-agent orchestration, UIs, tooling, analytics, CI/CD, auth/multi-tenancy, and production AI agents to automate marketing workflows and drive adoption across teams.

As a Mid-Level Full Stack Developer, the role involves building and maintaining web applications, implementing new features, and optimizing performance using Ruby on Rails in a remote setting.

As a Senior Software Engineer in ZT1, you will lead backend system development, manage projects, and influence product direction in a fast-paced, AI-centric environment.

Founding-team senior engineer to architect and build core platform components. Work with CEO/CTO to develop scalable distributed backend systems and frontend using React, Node.js and TypeScript. Implement solid coding practices, testing, CI/CD, and agile workflows while iterating rapidly in an early-stage fintech startup.

Work across frontend and backend to design, build, and ship annotation and review features; implement ingestion, storage, user management, and annotation pipelines; integrate model inference into workflows; optimize performance for large images/videos; design APIs and collaborate with product, operations, and annotators.

Build and maintain backend services in Python, design REST/GraphQL APIs, integrate LLM/AI workflows, and implement responsive React UIs from designs. Own end-to-end features, ensure observability, security, CI/CD, and collaborate with product and UX teams to deliver production-grade, cloud-native solutions.

The Full Stack Engineer will architect, implement, and maintain user-facing applications, improve UX, and design internal tools while collaborating with a team in a startup environment.

The Full Stack Engineer will develop and maintain scalable web applications, design system architecture, optimize performance, and collaborate with teams for code reviews in a hybrid work environment.

Design, build, and maintain backend services and REST APIs with NestJS/TypeScript and MySQL; implement React/Tailwind UI components; integrate frontend and backend; support Kafka messaging; collaborate with product/design using Figma; use AI coding tools to accelerate development and work in an agile cross-functional team.

As a Staff Full Stack Engineer at Assured, you will enhance the B2B SaaS platform by building and shipping features across the stack, leveraging AI tools, collaborating with teams, mentoring engineers, and driving architectural decisions to improve systems and product development.

Full Stack Engineer responsible for building responsive frontends (JS/TS, React preferred) and backend services (Python, Go, or Node.js/TypeScript), designing RESTful APIs, managing databases (Postgres/MongoDB), and deploying on cloud (AWS). Collaborate with teams, optimize performance, and apply DevOps practices (Docker, Kubernetes, CI/CD). Requires strong problem-solving, communication, and 3+ years of experience.