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 build and maintain applications, own features end-to-end, contribute to system design, and collaborate closely with product and design teams while improving system reliability and performance.

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

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.

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.

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.

Build and iterate full-stack applications and services for an automated rocket factory platform. Develop tools for planning, scheduling, data analysis, and operations; collaborate with stakeholders, follow agile practices, ship CI/CD software, and mentor engineers.

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.

Lead design, build, and deploy of a Business Partners Portal (3-month timeline) enabling distributors to submit POs, track status, receive notifications, manage documents, and route workflows. Implement secure authentication, role-based access, cloud-hosted environments, disaster recovery, and support UAT, Go-Live, hypercare, documentation, and knowledge transfer while collaborating with IT and business stakeholders.

Lead end-to-end development of full-stack AI features on a Ruby on Rails backend and React frontend. Build and optimize AI infrastructure for production LLM inference, implement RAG and AI agents, design and run experiments and A/B tests, improve tooling and processes for scale, collaborate with designers and leaders, and iterate quickly while maintaining high code quality and user experience.

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.

Build and own backend infrastructure connecting robotics, ML inference, data platform, and digital twin. Develop APIs, CRUD services, frontend visualizations, and deploy software to edge and cloud. Integrate with robotics software, support real-time monitoring, and create internal tooling for observability and developer productivity.

As a Founding Full-Stack Engineer, you'll build AI-native systems, integrating LLMs, prototyping quickly, and collaborating to influence engineering standards and culture.

Design, build, test, deploy, and support full-stack applications and integrations for AEC workflows. Develop API-first back ends, modern React/TypeScript front ends, Azure-hosted solutions, CI/CD pipelines, and observability. Partner with stakeholders, implement secure development practices, support production services, use AI-assisted tools responsibly, and mentor other developers.

As a Fullstack Engineer, you will develop and enhance user experiences for members and providers at Thyme Care, collaborating with teams to deliver scalable products.

The role involves building and integrating full-stack features for an AI chat application, focusing on reliable workflows and real-time AI interactions.

Deliver and maintain data pipelines, ETL/ELT, and API-driven data products; build RESTful APIs, Node.js backend services on AWS; and develop front-end interfaces using Vue/Vuetify while ensuring data quality, reliability, and integration with financial systems.

Own and build backend software connecting robotics, ML inference, data platform, and digital twin. Develop APIs, user-facing apps, CRUD services, and visualization. Deploy and maintain software on edge and cloud, integrate with ROS, and collaborate with robotics, data, ML, and infrastructure teams to improve observability and developer tooling.

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 Fullstack Engineer, you will build and deliver features, design data models, collaborate with teams, and enhance CI/CD processes to improve logistics decisions for national security missions.

Owner of end-to-end ecommerce features: design, implement, and maintain scalable backend services and performant React/Next.js frontends. Integrate payment gateways and procurement systems (PunchOut), mentor engineers, uphold code quality, and improve platform stability across Node.js, MySQL, and MongoDB.

As a Senior Fullstack Engineer, you'll contribute to backend development for Toast's New Ventures team, collaborating on architecture and launching MVPs while addressing unmet operator needs.

Lead design and delivery of production-grade AI-powered full‑stack features, integrating LLMs, agent systems, vector databases, and RAG. Build scalable frontend (React/Next.js) and backend (Python/Go) services, cloud-native infrastructure, CI/CD pipelines, and observability. Influence architecture, mentor teams, and drive technical vision from 0-to-1 through ongoing ownership.