Top Software Engineer Jobs in San Francisco Bay Area, CA

Software Engineers at Opto develop solutions for complex business problems, engage in all phases of product development, and foster collaboration within the team.

Build and own end-to-end features for a digital lab notebook: design backend models and APIs, craft rich frontend components with React, mentor engineers, collaborate with PMs and designers, and drive long-term technical vision and incremental delivery.

Build and operate ingestion, reconciliation, and reporting systems that reconcile card-network and partner settlement files against internal transactions. Deliver end-to-end features for traceability, accounting journals, tax and regulatory reporting, and compliance tooling while ensuring reliability, scalability, and data privacy.

Lead backend architecture and deliver reusable solutions, unblock engineering teams across the development lifecycle, drive complex design and bug fixes, set code review standards, mentor engineers, collaborate on company-wide projects, and make technical decisions balancing correctness, performance, and customer impact.

Design and implement complex Android platform projects, enable app developers with frameworks and tooling, drive Android best practices, collaborate with product and design, review code and write documentation, and use AI code-generation tools to architect and produce maintainable mobile code.

Build and maintain native iOS features and infrastructure using Swift and SwiftUI. Collaborate with product and design, review code, write documentation, ensure testability and stability, use approved AI code-generation tools, and participate in on-call rotation to support production systems.

Contribute to Android app development using Kotlin and Jetpack Compose, collaborate with product and design, write maintainable/testable code, review peers' code, use AI code-generation tools, and support app stability and experimentation. Participate in on-call rotation as needed.

Design, build, and operate services powering card issuance, transaction authorization, wallet provisioning, 3-D Secure, and disputes. Own features end-to-end within a microservice, event-driven architecture, write well-tested code, participate in reviews, and perform operational ownership including on-call and incident response. Leverage AI developer tools to improve velocity and quality.

Design, build, and deliver software features to drive customer impact, collaborate with teams, and improve development workflows.

Responsible for developing and enhancing an AI SDK, ensuring high performance and integration with deployment platforms, while collaborating with cross-functional teams and engaging with the open-source community.

As a Full Stack Engineer, you will build and manage the Vercel Dashboard, creating a personalized interface while optimizing backend services, APIs, and user interactions.

As a Software Engineer at GlossGenius, you'll develop large-scale web applications, build AI features, and enhance microservices infrastructure for small businesses.

The Software Engineer, Backend will develop scalable distributed systems, build REST APIs, and ensure high-quality software delivery while collaborating with teammates and stakeholders.

Design, build, test, ship, and operate services powering card issuance, transaction processing, and disputes. Own features end-to-end within a microservice and event-driven architecture, write well-tested code, participate in on-call incident response, and leverage AI tools to improve development velocity and quality while collaborating with cross-functional teams.

Build and scale backend infrastructure for Notions database (Collections) to improve P95 performance, reliability, and concurrency. Work on distributed systems, microservices, high-volume writes, observability, and platform features; partner with product and senior engineers and use AI tools to accelerate debugging and testing.

Build and maintain high-performance connected-device (Roku) frontend applications. Contribute to shared client architecture, reusable frameworks, and tooling. Optimize startup, memory, responsiveness, and playback. Collaborate with product, design, QA, and engineers; participate in code reviews, troubleshooting, documentation, and mentoring to improve code quality and cross-platform consistency.

The Software Engineer will architect billing systems and work on financial operations for product usage and subscriptions while ensuring operational reliability.

Build full-stack features for the Curator team: observability tools, AI context systems, governance workflows, SQL compilation and semantic model work, and intuitive front-end UX. Work across React, TypeScript, Python, and modern data warehouses to ensure reliable, trustworthy AI-driven answers.

As a Distinguished Software Engineer, you will design and build large-scale distributed systems, optimize machine learning platforms, and lead technical initiatives while mentoring talent.

The Software Engineer will enhance Lending products for Cash App, focusing on building complex systems, APIs, and collaborating with multiple teams to support economic empowerment through accessible credit.

Build, scale, and operate foundational event-based and data platforms powering product features. Work across the stack to design tools, infrastructure, and APIs, collaborate with Product, Data Science, Data Engineering and AI teams, and monitor production systems to optimize performance and minimize user disruption.

As a Software Engineer on the Workflows Team, you'll develop the Workflow Development Kit and platform, emphasizing AI integrations, durability, and observability while collaborating with cross-functional teams and engaging with the open-source community.

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.

Develop and enhance AI Gateway platform, contributing to the design and maintenance of features for optimal reliability in AI workloads while collaborating with cross-functional teams.

As a Full-Stack Engineer at Superhuman, you will develop core product features, infrastructure, and collaborate with teams to enhance user experience, focusing on both front-end and back-end services.