Top Full-Stack Engineer Jobs in Los Angeles, CA

Build and lead development of secure, scalable mission-planning and command-and-control web applications for space communications programs. Responsibilities include developing front-end interfaces and backend services, designing APIs, translating mockups into functional UIs, conducting code reviews, improving quality and security, mentoring junior engineers, and delivering software in air-gapped or highly secure government environments.

Build and own Eve's marketing site and GTM engineering stack: integrate and optimize external tools, design AI agents for sales and marketing, implement webhooks and middleware to sync product/CRM data, and create programmatic campaigns and internal tools in partnership with Marketing, Sales, RevOps, and Product to drive growth and automation.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

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.

The Full Stack Engineer will design, build, and maintain scalable web applications, impact customer onboarding and integrations, write and review code, and support technical improvements.

Develop and maintain scalable full-stack applications using Java Spring Boot and React. Build REST APIs, integrate warehouse and logistics systems, and work with Apache Kafka event streams. Support legacy application modernization, distributed systems, microservices, relational databases, production troubleshooting, performance improvements, testing, code reviews, and cross-functional technical collaboration.

Own full-stack modernization of complex federal legacy systems using Java, Spring Boot, REST APIs, React, and relational databases. Responsibilities include analyzing legacy workflows, designing scalable applications, building backend integrations and user interfaces, testing and deploying software, troubleshooting across application layers, and collaborating with technical and non-technical stakeholders. The role supports Agile delivery and migration toward the Palantir platform.

Designs and leads secure, scalable full-stack and enterprise architecture solutions for federal modernization initiatives. Responsibilities include application and cloud architecture, API and systems integration, microservices, data flows, technical design reviews, modernization strategy, security and compliance alignment, and mentoring engineering teams. Requires strong Java and frontend expertise, cloud experience, and the ability to translate mission and business requirements into durable technical solutions.

Build and maintain full-stack Ruby on Rails and React applications for defense and logistics operations. Responsibilities include designing APIs and data models, developing multi-source ingestion pipelines, creating data visualizations, deploying services on Kubernetes, implementing observability and security, optimizing disconnected-environment performance, and collaborating with product and design teams. The role also involves architecture discussions, technical documentation, testing, code reviews, and integration with secure DoD systems.

Build and maintain full-stack features across a Ruby on Rails monolith and Go microservices. Develop candidate portals, partner integrations, I-9 workflows, adjudication tools, asynchronous vendor pipelines, and AI-powered document and automation features. Own work end to end, including testing, code review, deployment, monitoring, and major user experience paths. Work with PostgreSQL, REST APIs, webhooks, OAuth, SFTP, and server-rendered frontends.

Build and ship end-to-end features for a restaurant operating system, lead architecture and technical execution, define product roadmap with cross-functional teams, and maintain high-quality CI/CD and productionized systems.

Build and modernize Scribd’s core reading experience for millions of users. Responsibilities include migrating Rails frontend surfaces to microfrontends, developing React and Next.js features, creating GraphQL APIs, building Node, Python, and Go services, improving document ingestion infrastructure, collaborating with Data/ML, Design, and Product teams, contributing to the design system, and enhancing frontend performance, accessibility, SEO, and maintainability.

Build and scale Cresta’s no-code conversation intelligence platform across the frontend and backend. Responsibilities include creating visual workflow editors, backend services and APIs, data models, storage layers, and scalable systems using React, TypeScript, Python or Go, Postgres, ClickHouse, and Elasticsearch. Collaborate with product, design, and AI/ML teams to deliver intuitive experiences for non-technical users while improving performance, reliability, security, and maintainability.

Build full-stack prospect demo solutions for ecommerce search and discovery products. Develop JavaScript data collection tools, front-end integrations, ETL workflows, dashboards, alerts, and open-source UI libraries and REST clients. Validate prospect data, support integrations, answer technical questions, collaborate with sales and product teams, and contribute to automated testing, code reviews, and demo infrastructure.

Build and enhance scalable full-stack applications and microservices using React and Java or Python. Diagnose performance and architectural issues, develop production-grade user interfaces, collaborate in Agile environments, and deliver cloud-based solutions. The role includes end-to-end implementation ownership, technical decision-making, team leadership, mentoring, and applying AI-assisted development tools. Work is remote eligible and supports mission-critical customer systems.

Design, develop, maintain, and support full-stack applications, Azure cloud services, REST APIs, integrations, and data workflows. Contribute to CI/CD, infrastructure automation, testing, monitoring, troubleshooting, documentation, and operational improvements. Participate in a 24x7 rotational on-call schedule, handling incidents, restoring services, documenting resolutions, and supporting continuous reliability improvements across business-critical platforms.

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.

Build backend APIs, Go services, data pipelines, and agent infrastructure for Vega, LaunchDarkly’s AI-powered observability platform. Design sandboxed agent execution, usage metering, dashboard creation capabilities, and enterprise data integrations. Own features from design through production, operate high-throughput systems, contribute to architecture and code quality, mentor teammates, collaborate cross-functionally, and participate in on-call rotations.

Design, build, and maintain backend services in TypeScript for millions of users; develop full‑stack features with React/React Native; participate in code reviews; provide technical leadership, mentorship, and architecture guidance; collaborate with PM and design; use monitoring/metrics and Agile practices to deliver scalable, user-focused products.

Build scalable full-stack applications integrating healthcare insights with browser-based and Windows EHR systems. Develop products using FHIR and HL7 interoperability standards, collaborate on technical roadmaps, and implement performant solutions. Mentor junior engineers, conduct code reviews, make technical decisions, and partner with engineering, product, and business stakeholders using Agile processes.

Build and own Dia’s enterprise administration products, including the Admin Console, entitlement and provisioning APIs, identity and policy configuration, usage metering, commerce integrations, and Atlassian Admin Hub integration. Partner with platform and client engineers to deliver enterprise features across web and native clients, establish technical direction, and shape the enterprise roadmap in a high-ambiguity startup environment.

Lead end-to-end design, development, and delivery of full‑stack features; drive architecture and code reviews; coordinate engineering work, write design docs and tests, and participate in Agile ceremonies. Must have blockchain/crypto experience.

Develop, maintain, enhance, and support a mission-critical federal Java application for HUD servicing, accounting, reporting, and compliance. Build full-stack interfaces and REST APIs, optimize SQL and database workflows, troubleshoot production issues, participate in Agile development and releases, support testing and deployments, document procedures, and contribute to modernization and technical debt reduction. The role collaborates with product, QA, database, infrastructure, configuration management, and security teams.

Design, architect, develop, test, and support scalable full-stack applications for a data catalog platform. Own features end to end, contribute to technical strategy and roadmaps, ensure operational excellence, collaborate across distributed teams, and mentor engineers. Build multi-tenant systems supporting high data volumes and near-real-time analytics while applying AI-assisted development practices.

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.