Top Senior Software Engineer Jobs in Los Angeles, CA

Designs, develops, tests, integrates, debugs, and maintains non-embedded software for classified defense programs. Translates customer requirements into software architectures, interfaces, algorithms, and designs; supports system integration and lifecycle processes. The role also handles technical issues, improves development processes and metrics, conducts software research, and ensures compliance with quality, safety, regulatory, and customer standards. Work involves Java, ReactJS, DevOps tools, Agile methodologies, and classified-program environments.

Develops, tests, maintains, and optimizes non-embedded Java and React software for classified defense programs. Responsibilities include translating customer requirements into designs, developing architectures and integrations, debugging issues, supporting users, improving software processes, and conducting research and development. The role uses Agile methodologies, DevOps tools, CI/CD pipelines, Linux and Windows environments, and AWS, while maintaining compliance with software quality, safety, security, and regulatory standards.

Design, develop, and support AR engine and Lens Studio features for Snapchat and Specs. Build agentic development workflows and tooling, contribute to architecture and technical roadmaps, participate in reviews, and collaborate cross-functionally. Improve code quality, reliability, performance, security, maintainability, and developer productivity while integrating AI-assisted and agentic capabilities into software systems.

Own the development and maintenance of large-scale React Native applications for iOS and Android. Lead architecture improvements, React Native upgrades, native module development, performance optimization, automated testing, CI/CD reliability, and production debugging. Collaborate with cross-functional product pods, contribute to technical discovery and architecture, mentor engineers, and raise engineering standards while delivering scalable, maintainable mobile experiences.

Design, build, and operate foundational developer infrastructure across CI, build systems, deployment orchestration, and test platforms. Improve build speed, deployment safety, and test reliability while owning services end to end, including SLOs, observability, and on-call responsibilities. Partner with engineering teams to address platform pain points and lead cross-cutting technical projects through production.

Designs, develops, tests, and deploys safety-critical flight software for Relativity Space’s Terran R rocket. Responsibilities include architecting real-time systems, integrating guidance and control algorithms, processing vehicle sensor data, controlling equipment, developing telemetry infrastructure, supporting hardware and physics simulations, establishing engineering best practices, and mentoring junior engineers.

As a Principal Flight Software Engineer, you will lead the architecture and development of flight software for space missions, ensuring safety and reliability while collaborating on technical decisions and standards.

As a Staff Flight Software Engineer, you will assist in the software development cycle, integrate GNC algorithms, maintain command telemetry databases, and develop reusable driver libraries for flight hardware.

Design and implement Android features from design through launch, optimize mobile UX and performance, perform code reviews, evaluate technical tradeoffs, and use AI tools to streamline development while maintaining security and production-quality code.

As a Senior Flight Software Engineer, you'll design and implement flight software for deep-space missions, ensuring integration with spacecraft hardware and supporting verification processes for mission success.

The Staff Flight Software Engineer will design and develop flight-critical software for spacecraft, ensuring integration and operational success. Responsibilities include full lifecycle software development, collaboration with various teams, and support for testing and mission simulations.

Build and architect frontend user interfaces for the Service Monetization Platform, focusing on acquisition and secure checkout. Collaborate with design, product, QA, and data teams to solve complex problems, optimize performance, and deliver features through end-to-end delivery, testing, and deployment in an Agile environment.

Design, architect, implement, and optimize high-performance iOS camera features (primarily Objective-C). Develop and launch stable mobile features, collaborate with Design, perform code reviews, and leverage AI tools responsibly to accelerate development while ensuring performance, security, and production quality.

Develop and operate high-reliability mission ground software supporting telemetry, commanding, data acquisition, mission control interfaces, simulation, and automated testing. Build scalable services, operator dashboards, CI/CD pipelines, infrastructure-as-code, observability, and deployment systems across laboratory, test, and mission environments. Collaborate hands-on with flight software, avionics, RF and ground systems, and mission operations teams.

The Software Engineer will develop and optimize data collection, integrate with cloud infrastructure, and collaborate on data pipeline advancements for AI models.

The Software Engineer will manage data collection processes, enhance cloud infrastructure, and collaborate on dataset roadmaps to improve Speechify's audio data ingestion pipeline.

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, develop, and support reusable components, interactions, frameworks and SDKs for Spectacles AR glasses and SnapOS. Contribute to OS components, participate in code and design reviews, and collaborate with design, engineering, and product teams to launch performant, test-covered features.

Design, implement, and optimize full‑stack web and mobile applications. Ship scalable, production‑ready features and UI components, improve performance and reliability, contribute to shared libraries, and use AI tools and metrics to inform development.

Design, implement, and operate critical, highly scalable backend services (identity, friend graph, persistence). Collaborate across teams, ensure availability, scalability, operational excellence, and cost management. Build, test, debug, and participate in incident resolution while leveraging AI tools to accelerate development and maintain secure, production-ready code.

Design, implement, and operate scalable ads delivery backend services. Own serving-time systems, collaborate with Product/ML/Infra, ensure availability and efficiency, use observability and automation, and apply AI-assisted workflows to ship production-quality code and optimize platform architecture.

Develop and maintain native iOS, tvOS, and visionOS applications for ABC News across Apple devices. Build high-quality, performant features, integrate backend and third-party services, resolve production issues, and guide full application lifecycles. Lead feature ownership, improve team processes, mentor engineers, conduct code reviews, collaborate with stakeholders, and promote sustainable architecture and continuous learning.

Develop and maintain Getty.edu and related digital experiences. Responsibilities include integrating internal CMS APIs, building Backend-for-Frontend services, developing performant Vue.js applications, supporting real-time workflows, maintaining CI/CD pipelines, improving development processes, and collaborating with UX, design, and product teams. The role also involves testing, code reviews, accessibility, technical direction, and reducing technical debt.

Develop and maintain Getty.edu and related digital experiences using Vue.js and modern JavaScript. Build CMS integrations, reusable accessible components, design token systems, and scalable frontend and backend features. Support CI/CD pipelines, testing, technical design, code reviews, and software development best practices while collaborating with designers, UX researchers, architects, and stakeholders.

Develop and support cinematic pipeline tools for animators, audio engineers, and producers. Build Unreal Engine tools and plugins in C++ and Python, plus external C# applications for ingesting, authoring, managing, and exporting cinematic content. Collaborate with production leadership and game teams to define requirements, plan technical work, estimate tasks, test solutions, and support shipped tools.