Top Full-Stack Engineer Jobs in Los Angeles, CA

Develop and maintain web applications across the full stack using Java/Spring Boot backend and Angular frontend. Build microservices, design RESTful APIs, integrate frontend components, work with Kafka and AWS S3 as needed, and collaborate with cross-functional teams to troubleshoot and deliver solutions throughout the SDLC.

Design and build backend microservices with Java and Spring Boot, create and maintain RESTful APIs, and develop Angular frontend components. Work across the full stack, integrate asynchronous patterns (Kafka) and AWS S3, collaborate with cross-functional teams, and troubleshoot/debug applications throughout the software lifecycle.

Design, build, and modernize cloud-native applications on Azure (AKS, App Services, Functions). Maintain and enhance legacy React/.NET applications, develop REST APIs, monitor performance, and migrate .NET apps to microservices. Act as subject-matter expert in asset management, communicate with stakeholders, and support full-stack development across frontend and backend technologies.

Design, develop, and maintain full-stack web applications using Java/Spring Boot backends and Angular frontends. Build RESTful APIs and microservices, implement fault tolerance (Hystrix/circuit breakers), event-driven solutions with Kafka, and observability (SLI/SLO). Deploy and manage services on Kubernetes and AWS, collaborate with cross-functional teams, mentor junior developers, and ensure system reliability and performance.

Build and maintain polyglot full-stack applications, architect scalable microservices, implement agentic AI/LLM workflows, develop modern frontends, manage AWS cloud infrastructure, and own the full software lifecycle including deployment and production monitoring.

Design, develop, and maintain backend microservices in Java/Spring Boot; create RESTful APIs; build Angular frontend components; integrate asynchronous communication (Kafka) and AWS S3 storage; collaborate across the SDLC and troubleshoot full-stack issues.

Design, develop, and maintain high-performance web applications and WebAPIs using .NET 6 and React. Build scalable, reliable services, optimize performance, troubleshoot defects, and collaborate with product and development teams. Use Azure platform services, NoSQL/SQL databases, CI/CD pipelines, and propose continuous improvements.

Build end-to-end product features to improve teacher activation, engagement, and monetization. Optimize onboarding and early user experiences, design scalable AI-powered and growth systems, run experiments with product/design/data, iterate using data and user insights, maintain high-quality codebase, and mentor other engineers.

Design, build, and operate scalable full-stack systems for an AI-native enterprise platform: backend services, APIs, frontend React apps, workflow orchestration, integrations, testing, CI/CD, monitoring, and production readiness while collaborating with product and customers.

Build and maintain end-to-end web, backend, and mobile features using NestJS, Next.js, and React Native. Design APIs, implement data models and background jobs, collaborate with product/design, contribute to CI/CD and deployments, participate in code reviews, and ensure performance, reliability, and testability across services.

Secure customer-facing products, APIs, and internal services through threat modeling, architecture and code reviews. Remediate vulnerabilities by coding fixes in Python/Go/JS/TS. Build and manage SAST/DAST/SCA security pipelines in CI/CD. Configure WAFs, API gateways, and bot protection. Provide secure coding guidance, run bug bounty triage, and support compliance (SOC 2, ISO 27001, GDPR).

Develop fullstack web applications, enhance platform performance, collaborate on high-impact opportunities, and ensure stable, scalable solutions. Engage in rapid iterations and be a committed team player.

Lead development of core client systems and engine-level infrastructure in Unity/C#. Diagnose and fix cross-cutting performance issues, upgrade third-party SDKs, evolve build tooling, produce design docs, scope multi-week infrastructure initiatives, mentor engineers, and drive profiling, optimization, and architecture changes to enable future features.

Lead architecture and hands-on development of cloud-native Java microservices with an Angular frontend. Build FHIR/HL7-based interoperability pipelines, design scalable event-driven systems on GCP, and ensure data integrity across PostgreSQL/Spanner while defining engineering best practices and guiding agile teams.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

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.

The Fullstack Engineer will design, develop, and improve software for public safety agencies, adhering to quality, security, and architecture standards while collaborating with teams.

Build and maintain internal web tools supporting ML workflows. Develop backend services, frontend features, and deployments; participate in on-call rotations and code reviews; collaborate with partner teams to scale ML tooling and improve authentication and deployment processes.

Develop and maintain front-end and back-end components of AI-driven products, collaborating with teams to enhance user experience and build proof of concept products.

The Full-Stack Engineer will enhance backend functionality, collaborate with teams, and maintain platform performance and security, requiring expertise in Python.

The Full Stack Engineer will design and build features for LaunchDarkly's Observability product, focusing on Infrastructure-as-Code and enterprise integrations, while participating in architecture discussions and maintaining high engineering standards.

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.

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.

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.

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.