Top Senior Level Software Engineer Jobs in Los Angeles, CA

Develop and customize insurance applications on the Guidewire platform (PolicyCenter, BillingCenter, ClaimCenter). Design, code, test solutions using OOP and Guidewire technologies, manage system configurations, mentor junior staff, build client relationships, and apply firm methodologies to deliver high-quality insurance technology solutions.

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.

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.

The Data Engineer III will design, implement, and optimize data services, ensuring they meet business needs and drive automation and best practices across Crunchyroll's data environments.

As a Senior Software Engineer at Whatnot, you'll build AI tooling for internal use, developing workflows and infrastructure to enhance software delivery. You'll collaborate across teams to gather feedback and prioritize features in a rapidly evolving landscape.

Lead design, architecture, and implementation of APIs, front-end interfaces, and backend services for satellite and ground systems. Guide Agile/DevSecOps development, CI/CD, automated testing, and security practices; lead code reviews, mentor team members, and own features through full lifecycle to deployment.

This role involves developing multi-physics simulation software for spacecraft, focusing on designing algorithms for coupled physics interactions and mentoring junior engineers. Responsibilities include API design and integration, coding in C++, and collaborating with multidisciplinary teams.

Design, build, and maintain blockchain and payments infrastructure; develop scalable microservices and secure RESTful APIs to transfer value across blockchain and banking protocols; integrate with banks and fintech; own system design, testing, deployment, and troubleshooting; ensure reliability, code quality, and strong test coverage while collaborating with product and engineering teams.

The role involves being an expert in Powder Bed Fusion processes for creating reusable rocket components, leading material qualifications, and improving manufacturing processes while collaborating with cross-functional teams.

Build and scale full‑stack product features and systems across frontend and backend. Own projects end‑to‑end from design through rollout and maintenance. Improve reliability, performance, observability, and scalability. Collaborate with Product and Design, mentor teammates, contribute to architecture and design reviews, and leverage AI tools to accelerate development while maintaining engineering judgment.

As a Senior Software Engineer, you will design and implement EHR integrations, develop API integrations, mentor junior engineers, and build scalable systems for healthcare interoperability.