Top Full-Stack Engineer Jobs in Los Angeles, CA

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.

Build and own end-to-end full-stack features across backend services and user-facing applications. Contribute to system design, reliability, performance, observability, and engineering practices while collaborating with product and design.

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

Design, develop, and deploy secure cloud-native applications on Azure. Build and maintain CI/CD pipelines, infrastructure-as-code, automated testing, and monitoring. Implement DevSecOps practices, support high-volume APIs and integrations, and collaborate with cross-functional teams to ensure scalable, production-ready solutions.

Design, build, and maintain mission-critical full stack applications for SpaceX and Starlink. Own architecture, development, testing, deployment, and performance optimization. Collaborate cross-functionally to prototype, deliver production systems, and deeply understand user problems. Work onsite and support launch cadence, including extended hours when required.

Develop and maintain full-stack web applications, building responsive front ends and scalable backend services. Design and optimize relational and NoSQL databases, integrate AI/cloud services, implement APIs and CI/CD, participate in architecture and code reviews, troubleshoot production issues, and collaborate with product and design teams to deliver mission-critical features.

Design, build, and optimize full-stack mobile and desktop web applications. Implement user interfaces, contribute to shared libraries, log and analyze metrics, use AI tools to accelerate development, and maintain high standards for code correctness, security, testing, performance, and scalability.

Design, implement, and optimize full‑stack web and mobile applications. Ship scalable, production‑ready features and UI components, improve performance and reliability, contribute to shared libraries, and use AI tools and metrics to inform development.

Build and maintain Apex's business systems platform in Palantir Foundry: configure systems, manage security and updates, integrate data sources, support daily operations, document processes, plan projects, and recommend remediations to meet business needs.

Lead design and build of scalable AWS cloud-based backend services and APIs powering web and mobile customer experiences. Own end-to-end feature delivery, improve grading and authentication workflows for scale and reliability, leverage AI tools to accelerate development, and provide technical leadership and mentorship across teams.

As a Senior Software Engineer, you'll design, develop, and maintain full-stack applications, utilizing TypeScript and modern frameworks while collaborating cross-functionally to enhance user experience and performance.

Modernize a large fintech platform by building NestJS services and Next.js UIs, migrate transactional data to relational schemas, write comprehensive tests, identify and fix legacy problems, design scalable solutions that coexist with legacy systems, and use AI tooling responsibly to increase engineering velocity.

Seeking a full stack engineer to develop applications, requiring skills in Node.js, SQL, and modern JavaScript frameworks with a focus on scalability and performance.

Design and build a high-performance, AI-native web trading experience for sophisticated retail traders. Ship core trading workflows (order entry, positions, blotter, watchlists, alerts), implement trustworthy AI UI patterns, collaborate with backend engineers on low-latency contracts, and iterate quickly with users and stakeholders to deliver end-to-end product features.

Build and maintain full-stack systems for user and access management: design/consume GraphQL/REST APIs, implement high-scale backend services (Java/C#), and create complex React frontends. Work cross-functionally with design and product, translate requirements into data models and APIs, participate in on-call rotation, lead incident reviews, and improve security and observability across microservices.

Develop and implement full stack features for a healthcare platform, focusing on both frontend (React) and backend (Node.js) development. Responsible for performance optimization, API creation, testing, and collaboration with data engineering teams.

Back-end leaning full-stack engineer to build 0-to-1 product experiences: design backend systems, APIs, data flows, and AI-enabled workflows; contribute to React frontends; prototype rapidly and harden production systems while collaborating cross-functionally.

Join a small team to improve a tech product aimed at upskilling users in MENA, working with JavaScript and Node.js in a collaborative remote environment.

The Senior Engineer will build and scale fullstack applications, ensuring performance and security while collaborating with various teams. Responsibilities include developing backend services, APIs, and modern frontend applications, along with mentoring engineers and driving architectural decisions.

Build and maintain full-stack features using Ruby on Rails back end and Angular front end. Own features end-to-end, diagnose full-stack issues, set technical direction, mentor engineers, and support cross-functional teams across multiple product domains and core platform services.

Build and maintain C#/.NET APIs and a modern TypeScript front-end for a designer-facing selling tool. Ship features continuously behind feature flags, write automated tests, iterate with product designers, learn in-home design workflows, and collaborate with senior engineers to grow ownership and deliver production-quality software used by field professionals.

Design, build, and maintain scalable backend services and APIs for commerce workflows using Python/Django. Improve reliability, performance, and observability, operate AWS deployments, work with PostgreSQL and event-driven architectures (SNS/SQS), modernize legacy systems, and support CI/CD, testing, and production troubleshooting.

Lead full‑stack design and delivery of customer-facing web experiences (Browse, Navigate, Preview). Own architecture, APIs, data models, rollouts, observability, on‑call readiness, and cross-team alignment, using approved AI-assisted workflows while ensuring technical quality and reliability.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Build and ship full-stack features for customer-facing Console and Playground, plus internal tools. Design and maintain APIs and backend services, implement accessible performant frontends, translate product requirements into incremental work, and improve code quality through reviews and design discussions.