Top Senior Level Software Engineer Jobs in Los Angeles, CA

Design Engineer will rapidly prototype and iterate mobile products (primarily iOS), build tooling and internal systems, collaborate with designers, PMs, and engineers to drive product strategy, test with researchers, and ship polished experiences to hundreds of millions of users. Role involves presenting work to leadership and occasionally prototyping on web, AR, and AI platforms.

Lead design and build of an AI-powered, spec-driven development platform: evaluate frameworks, architect end-to-end tooling, integrate with CI/CD and Kubernetes, partner with DevOps, MLE, and Security, instrument adoption and velocity metrics, and drive org-wide rollout and training to enable non-engineers to author specs.

Lead design and delivery of scalable budgeting and pacing infrastructure. Build and maintain high-performance Java production systems, collaborate with engineering and product teams, apply data-driven decision making, and ensure reliability, observability, and continuous improvement of distributed systems.

Design, build, and scale cloud-based backend platform components and connectors for ERPs, banks, payments, tax and subledger systems. Lead architecture, deliver highly available multi-tenant SaaS services (API gateway, event bus, identity, scheduler, search, workflow orchestration), ensure performance, security, extensibility and testability, mentor engineers, drive technical decisions, and support deployments and occasional off-hours support.

Design and build core services for Metropolis Web Services, focusing on distributed systems. Collaborate with multiple technical teams and mentor engineers. Architect scalable systems and establish operational standards for high reliability and performance.

Lead and grow a software engineering team owning delivery, quality, and operational health. Provide technical oversight for architecture and code quality, drive planning and execution cadence, adopt AI-assisted development tooling, recruit and onboard engineers, remove blockers and manage cross-team dependencies, and partner with product and design to deliver high-impact work.

Leads a 20-plus-person distributed Review Engineering organization across three agile squads. Owns technical direction, production reliability, incident response, system scalability, delivery metrics, hiring, performance management, and engineering career growth. Partners with Product, Design, Security, Clinical Operations, and peer engineering teams to deliver reliable, secure, high-quality systems in a regulated healthcare environment.

Own and lead the technical direction of a major codebase section while designing, building, testing, documenting, and maintaining secure, scalable API-based decisioning products. Partner with product, engineering, and security teams on agile delivery, troubleshoot production issues, meet SLA requirements, and participate in an on-call rotation.

Build and own end-to-end full-stack systems for AI-powered agentic trading across web and React Native mobile. Implement real-time, low-latency UIs and Go backend services, integrate streaming AI/ML features and market data, drive architecture and code quality, and collaborate with AI/ML, design, and product teams to ship production-ready features used by millions.

Design, build, and maintain scalable, reliable full‑stack systems. Contribute to API and architecture design, write testable code, debug complex issues, improve performance, automate deployments, and mentor junior engineers while collaborating with cross‑functional teams.