Top Senior Full-Stack Engineer Jobs in Los Angeles, CA

Build and own complex frontend features using Vue 3 and TypeScript while developing the Python services and APIs that power them. Improve performance, accessibility, testing, CI/CD, and observability; collaborate with product and design; mentor engineers and apply AI-assisted development tools responsibly to accelerate productivity and maintain quality and security.

Design and implement scalable backend services for payment and transaction workflows using Java. Own end-to-end features from data model and APIs to Angular frontends, improve reliability and performance, refactor legacy systems, troubleshoot production issues, and collaborate with product and design. Leverage AI-assisted development tools responsibly and share best practices across the team.

The Senior Full-Stack Engineer will manage client relationships, design integration solutions, and ensure seamless delivery and optimization of technical workflows, while leveraging AI for efficiency.

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.

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.

Build and maintain C#/.NET backend services and a modern TypeScript front-end used by in-home designers. Ship continuously behind feature flags with automated tests and progressive rollouts, optimize tablet performance, iterate with direct user feedback, and incorporate AI-assisted workflows to accelerate delivery.

The Sr Product Software Engineer will design, implement, and optimize ad decisioning software within a microservice environment, collaborating with data science and utilizing AI/ML technologies.

Senior Full Stack Engineer (backend-focused) to design, build, and operate scalable backend systems and APIs, deliver full-stack features, improve reliability and observability, and contribute to architecture and technical strategy in a fast-paced startup environment.

The Senior Full-Stack Engineer will develop complex business applications using Laravel and ReactJS, collaborate with teams remotely, and integrate with third-party services.

Develop large scale enterprise applications, write APIs, collaborate with team members, optimize performance, and integrate systems.

The Senior Full Stack Developer will build end-to-end solutions, collaborate in a remote environment, and write technical documentation. The role requires expertise in Ruby on Rails and various programming paradigms.

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.

Design, build, and maintain reliable full-stack applications across SpaceX. Own product development from prototype to production, collaborate on architecture and code reviews, diagnose user problems, and ensure testing, CI/CD, deployment, monitoring, and performance optimization.

The Senior Full Stack Engineer will design and implement APIs with NodeJS, develop UIs with React, manage data pipelines, and deploy projects on AWS.

As a Sr. Full Stack Engineer, you'll develop features across the stack, improve platform performance, and collaborate closely with design and product teams.

Senior fullstack engineer to build and scale Brigit's consumer finance platform. Own end-to-end features across frontend (React/React Native/TypeScript) and backend (Java/REST/SQL), optimize database and APIs for high scale, integrate 3rd-party services, implement risk and transaction algorithms, improve CI/CD, testing, monitoring, and internal tooling to support millions of users.

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

Build and maintain full-stack applications for factory and launch operations. Design, implement, and deploy enterprise tools and data systems, collaborate with stakeholders, follow agile CI/CD practices, mentor engineers, and iterate on scalable solutions across cloud and on-prem infrastructure.

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.

Design and build agent-powered mission consoles, collaborate with stakeholders to improve user workflows, and maintain agentic workflows for mission outcomes.

As a Senior Software Engineer, you will design and build a cutting-edge identity search platform and implement AI systems for defense applications, working closely with cross-functional teams to enhance user workflows and support national security.

Design, build, and maintain cloud-native full‑stack SaaS applications. Lead architecture and best practices, develop Angular front ends and C#/.NET microservices, optimize MS SQL Server data access, troubleshoot production incidents, and mentor engineers. Use AI-assisted coding tools and observability practices to ensure secure, performant, and maintainable systems.

Build end-to-end features and new products for a creator-focused marketing platform. Work across frontend and backend, collaborate with design and users, make architectural decisions, and establish engineering standards, tooling, and processes for a growing team.

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.

Responsible for leading a team of engineers, supporting product development, identifying technical issues, and ensuring high-quality code delivery in backend systems at scale.