Top Staff Software Engineer Jobs in Los Angeles, CA

Own the technical direction and architecture of a shared product platform spanning identity, access, tenancy, APIs, developer tooling, and data services. Write production code, lead design reviews, establish scalable and reliable engineering practices, translate ambiguous requirements into executable plans, and mentor engineers across teams. The role requires strong backend expertise, cloud-native systems experience, product judgment, and comfort working autonomously in a greenfield environment.

Own Sidecar Health’s search platform end to end, including AWS OpenSearch clusters, indexing pipelines, search APIs, relevance and ranking, hybrid lexical and semantic retrieval, observability, quality reporting, and incident response. Lead search architecture, expand support for healthcare content types, improve near-real-time indexing, communicate technical direction across teams, mentor engineers, and build internal relevance and analytics tooling using agentic developer tools.

Architect and develop scalable frontend applications supporting sales and operational workflows. Lead frontend architecture, frameworks, tooling, accessibility, security, testing, performance, and maintainability. Mentor engineers, guide technical roadmaps, lead large projects, collaborate with product, design, backend, and platform teams, and modernize internal platforms. The role also champions pragmatic AI-assisted development and supports early-stage product evolution in a complex transactional domain.

Lead architecture and development of secure, high-scale Python and FastAPI payment infrastructure for AI-agent transactions. Design APIs for tokenization, mandates, authentication, attestation, and cryptogram workflows; own security, reliability, observability, testing, Kubernetes provisioning, and production operations. Drive technical initiatives, design reviews, and cross-functional collaboration with product, security, infrastructure, platform, and card-network partners while applying AI-assisted engineering practices.

Lead the design of distributed systems, drive large initiatives, and enhance technical architecture at Whatnot, fostering rapid growth and stability.

Lead the technical vision and architecture for backend systems supporting experimentation, personalization, analytics, and conversion optimization. Design and operate high-throughput distributed systems and APIs, build data infrastructure, and productionize AI/ML capabilities. Drive complex multi-team initiatives, influence engineering strategy, establish technical standards and operational excellence, and mentor senior engineers. Partner with product, data science, ML, and engineering teams to translate business needs into scalable solutions.

Set technical direction for distributed messaging systems handling billions of messages daily. Make architecture decisions balancing scale, cost, and reliability; solve ambiguous cross-team problems; establish engineering standards; mentor senior engineers; improve processes and tooling; assess candidates; and use AI agents for multi-file software changes.

Owns Shopify checkout and post-purchase extensions, experimentation reporting, and revenue-critical APIs across PHP, TypeScript, MySQL, BigQuery, and Google Cloud. Designs secure REST services, investigates production issues, participates in on-call, and maintains unit and end-to-end testing without a separate QA handoff. The role requires Staff-level technical ownership, system-wide architectural judgment, AI-assisted development, mentoring, and collaboration in a remote, high-autonomy environment.

Provides hands-on technical leadership across product areas by defining architecture, engineering standards, and scalable system designs. Leads modernization, cloud transformation, platform scalability, developer productivity, and cross-team technical initiatives. Partners with product and engineering stakeholders, conducts design reviews, manages technical risks, and mentors engineers. Requires extensive experience with TypeScript, Node.js, C#, distributed systems, cloud platforms, DevOps, Terraform, and reliable enterprise software.

The Staff Software Engineer will shape technical direction, build developer platforms, and design AI agents, enhancing developer productivity and collaboration across teams.

The Staff Software Engineer will lead technical strategy, ensure system availability, and develop backend systems at scale, collaborating across teams to drive capacity modeling and operational quality.

Lead cross-pod technical direction and system design for high-scale backend services, embed AI-native development practices, collaborate with product and design, mentor engineers, and drive ambiguous initiatives from design through production.

Build and improve RWX’s developer, build, and test cloud across product areas. Work as a generalist on UI, infrastructure, Linux systems, CI/CD, and reliability. Own planning, execution, releases, architecture, integration testing, and product decisions while maintaining high software quality and thoughtful use of AI agents.

Design and implement Kotlin backend services and end-to-end systems for Toast POS device management. Lead technical designs, estimations, performance optimization, cross-team collaboration, and software quality practices including modern testing and observability. Mentor peers and drive product roadmap alignment with product, hardware, and QA stakeholders.

As a Staff Software Engineer, you will lead technical strategies, drive architectural decisions, mentor engineers, and develop consumer banking solutions using various technologies.

Sets technical direction for Helix’s Experience platform and broader engineering organization. Designs and implements distributed, full-stack genomic software systems focused on patient and provider experiences. Leads complex projects from scoping through production, advances AI-assisted engineering practices, establishes quality and delivery standards, mentors technical leaders, and drives cross-functional collaboration with product, design, research, scientific, and business teams.

Design, implement, and maintain cloud-native full-stack software to migrate, preserve, and make large volumes of government records searchable and accessible. Build Section 508-compliant frontends and secure backend APIs, follow API-first and CI/CD practices, defend against vulnerabilities, mentor engineers, and collaborate with cross-functional teams to deliver reliable, performant systems.

Design, develop, and maintain high-quality cloud-based applications within an Agile team. Collaborate on architecture, product requirements, and software development; troubleshoot production issues; evaluate technologies; provide technical leadership; and optimize performance through memory management, parallelization, and algorithm efficiency. The role also involves building multitenant database architectures, implementing secure APIs and event-driven systems, writing unit tests, and debugging complex software issues.

Lead the design and evolution of predictive maintenance platform, build and scale ML-powered features, and mentor other engineers.

Lead full‑stack development and architecture for Spark’s broker platform. Deliver customer‑facing features, partner with product/design, mentor engineers, resolve technical debt, and set engineering standards while using AI developer tools.

Design, build, and operate backend systems for prediction markets, including order management, trade matching, settlement, and market resolution. Architect distributed, low-latency systems with strict financial correctness, lead multi-quarter technical projects, mentor engineers, and collaborate with Product, Compliance, and Risk to meet regulatory requirements.

Develop ML/RL models and infrastructure for AV simulations, optimize training loops, and support project timelines in autonomous vehicle tech.

Lead design and development of scalable, cloud-native AI healthcare payment integrity platforms. Provide technical leadership, own production code and releases, design data/retrieval architectures, ensure observability, security, and compliance, and collaborate with ML, product, and architecture teams to deliver performant SaaS solutions.

Lead design and delivery of enhancements to a next-generation AI agent platform. Own large features and infrastructure, mentor engineers, set technical standards, drive cross-team initiatives, improve reliability and SLOs, and influence product and process decisions to scale systems supporting millions of interactions.

Build and evolve AWS platform infrastructure, Terraform and Pulumi automation, internal developer tooling, TypeScript libraries, CI/CD pipelines, and ephemeral environments. Improve reliability through SLOs, error budgets, observability, autoscaling, and incident response while addressing performance challenges across Aurora PostgreSQL and distributed services. Partner with product engineers, document complex systems, and raise engineering standards.