Top Senior Software Engineer Jobs in Los Angeles, CA

The Sr. Software Engineer, Front End will develop 2D and 3D frontend features, drive architectural direction, mentor junior engineers, and address technical debt under high accountability in a complex simulation environment.

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.

Architect, build, and optimize a full-stack platform (React frontend, Node.js backend). Lead technical decisions, design and optimize APIs and databases, improve observability, enforce testing strategies, introduce new technologies, mentor engineers, and drive cross-team initiatives to deliver scalable, reliable software for commercial contractors.

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.

Looking for a Software Engineer to build financial products and tooling for Cash App's Lending team, ensuring quality and compliance while collaborating across domains.

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.

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.

Design, build, and own scalable microservices and secure APIs that transfer value across blockchain and banking protocols. Extend in-house blockchain infrastructure, integrate with banks and cloud services, troubleshoot production issues, document system and testing procedures, and collaborate with product and engineering teams to deliver reliable payment experiences.

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 Trust & Safety, you'll analyze threats, design systems for abuse detection, and collaborate with teams to implement scalable defenses.

Lead implementation and governance of software processes across the full software lifecycle for satellite systems. Incorporate Boeing design practices into artifacts, develop and approve engineering documentation, guide adoption, support audits and reviews, advise leadership, design tooling and metrics for measurement, deliver process training, and ensure alignment with project, Boeing, and industry standards.

Lead full-stack development on AWS for complex, distributed systems. Design architectures, translate customer requirements, drive agile lifecycle activities, mentor teams, ensure software quality, implement infrastructure tooling, and support system integration and maintenance.

Develop and sustain mission-operational software product lines and new capabilities across multiple subsystems. Write advanced object-oriented C++ code on Red Hat Enterprise Linux, participate on Agile teams, use DevSecOps and test automation practices, and collaborate with stakeholders to solve complex national-security engineering problems. Position requires travel for training and maintenance of required security clearances.

As a Senior Application Software Engineer, you will design and develop mission-critical software for satellite operations, collaborating with cross-functional teams to improve efficiency, scale, and support ambitious missions.

As a Principal Application Software Engineer, you will design mission-critical software for satellite design and production, improve operations, and mentor staff.

The Software Engineer will perform development, testing, implementation, and support for Teamcenter environments, focusing on customizations and programming using advanced skills in Teamcenter and programming languages.

As a Software Engineer on the Mission Dev team, you will deploy software in federal environments, manage integrations, and support mission-critical programs for government agencies.

The Principal Network Software Engineer will manage the software development and integration of network communication systems for spacecraft, ensuring quality and project milestones are met while interfacing with teams and managing contracts.

Design and build a shared, feature-rich streaming media playback library for Apple platforms. Collaborate with cross-functional teams, design APIs, research playback integrations, implement features, troubleshoot issues, participate in estimation and planning, and ensure high-quality, maintainable code using Apple technologies (UIKit/SwiftUI, AVKit/AVFoundation) across iPhone, iPad, and tvOS.

Design, implement, test, and maintain real-time satellite payload models and integrate them into system-level simulators. Perform full software lifecycle activities, develop verification plans and test environments, create automation tools, collaborate with cross-functional teams (systems, hardware, flight software), and deliver high-impact solutions in an agile CI/CD environment.

Build and maintain Disney+ Roku client player and playback features using BrightScript and Roku SceneGraph. Develop cross-device UI, optimize performance, and create supporting tools (JavaScript/React, Node.js, gulp, AWS). Collaborate with Roku and cross-functional partners, mentor junior engineers, and contribute to player technologies and device-specific troubleshooting.

As a Senior Software Engineer, you will develop low-latency data pipelines, integrate algorithms, and enhance developer tools while collaborating with various teams in a dynamic environment.

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.

The role involves leading software development for satellite systems, managing requirements, architecture, and CI/CD pipeline implementation within an agile environment.

Senior remote software engineer responsible for designing and building web applications and microservices using the Java stack and modern web frameworks. Client-facing role involving architecture, code reviews, Agile delivery, REST/SOAP web services, Angular/Node.js front-end work, data modeling for large databases, and ensuring quality through unit/integration/regression testing.