Software Engineer jobs in California

Terran Orbital

Full-time · Irvine, CA · $160,000 – $190,000

A Staff-level embedded Linux engineer at a satellite manufacturer, leading a small team while architecting and developing high-reliability software for spacecraft systems. This role suits experienced C/C++ engineers comfortable with low-level hardware integration, real-time operating systems, and satellite payloads who are ready to mentor others and interact with customers.

Listed on Terran Orbital’s careers site · Apply there ↗

Protegrity

Menlo Park, CA · $209,100 – $234,100 · Remote

This role involves building backend systems that integrate generative AI safely into enterprise products, using Python, Kubernetes, and vector databases. It suits experienced backend engineers who want to work at the intersection of AI systems and data security infrastructure.

Listed on Protegrity’s careers site · Apply there ↗

Voyager

Full-time · El Segundo, CA · $170,000 – $230,000

This role leads the technical development of an AI-native mission management platform that translates natural language operator requests into executable satellite collection plans. It suits experienced software engineers or mission systems leads with deep GEOINT tasking knowledge who want to bridge agentic AI and orbital mechanics in high-stakes national security work.

Listed on Voyager’s careers site · Apply there ↗

Together AI

Full-time · San Francisco, CA · $160,000 – $230,000

A fullstack engineer at an AI platform company who will own product features end-to-end across developer-facing surfaces like model playgrounds and fine-tuning tools. This role suits engineers who care about shipping real value to users and enjoy moving between backend and frontend code within a small, fast-moving team.

Listed on Together AI’s careers site · Apply there ↗

Pylon

Internship · San Francisco, CA

Pylon is seeking a software engineering intern to build AI-powered features for their B2B customer support platform, working alongside senior engineers from top companies and shipping real product quickly. This role suits someone graduating in 2026-2028 who wants hands-on full-stack experience in a fast-paced startup environment.

Listed on Pylon’s careers site · Apply there ↗

Obsidian Securty

Full-time · Palo Alto, CA · $155,000 – $180,000

Obsidian Security is hiring a backend software engineer to build security products that detect and mitigate risks from AI agents and large language models being deployed inside enterprise SaaS applications. The role suits engineers with 1–3 years of production experience in a modern language who want to develop expertise in AI threat modeling, data pipelines, and emerging attack surfaces in the rapidly evolving agentic AI space.

Listed on Obsidian Securty’s careers site · Apply there ↗

InstaLily

Full-time · San Francisco, CA · $120,000 – $140,000

InstaLILY is building AI-powered software infrastructure for large industrial operations, and this role involves shipping features on their core platform while working closely with enterprise customers. You'll contribute to systems running live in billion-dollar businesses, mentor peers, and help shape an early-stage company that has already achieved significant traction.

Listed on InstaLily’s careers site · Apply there ↗

Zilliz

Redwood City, CA · $175,000 – $250,000

Zilliz seeks a senior engineer to develop vector indexing algorithms and systems for their database platform, blending research exploration with production engineering. This role suits someone who enjoys reading research papers and prototyping new ideas but also has the discipline to ship performant, reliable code at scale.

Listed on Zilliz’s careers site · Apply there ↗

Suno

Full-time · Los Angeles, CA · $228,000 – $363,000

Suno is seeking experienced Android engineers to build the core mobile app for an AI-powered music creation platform. You'll own significant features across creation, discovery, and playback, collaborating closely with product and design to ship a polished, high-performance app that millions use.

Listed on Suno’s careers site · Apply there ↗

Eight Sleep

Full-time · San Francisco, CA · $200,000 – $235,000

Senior iOS engineer role at a sleep technology company building consumer health products with millions of users worldwide. Suits experienced developers who want to work on high-quality native apps in a fast-paced, high-stakes startup environment where technical excellence is non-negotiable.

Listed on Eight Sleep’s careers site · Apply there ↗

Labelbox

Full-time · San Francisco, CA · $140,000 – $200,000

This role owns the design and operationalization of reinforcement learning training environments—the sandboxed systems where AI agents learn and interact. It's ideal for a systems-minded software engineer who understands RL fundamentals and wants to solve high-leverage infrastructure problems at the intersection of ML and DevOps.

Listed on Labelbox’s careers site · Apply there ↗

Gofundme

Full-time · San Francisco, CA · $233,500 – $321,200

GoFundMe seeks a senior-level engineer to own the identity and access platform that powers authentication across their donation and nonprofit product ecosystem. The role combines hands-on platform work with technical leadership, focusing on login systems, SSO, and account linking at scale.

Listed on Gofundme’s careers site · Apply there ↗

Ando

San Francisco, CA

Ando is building a next-generation messaging platform that integrates AI agents as first-class participants alongside humans. This founding engineer role involves architecting core infrastructure, developer platforms, and memory systems while working on a product designed to reach hundreds of thousands of users.

Listed on Ando’s careers site · Apply there ↗

Modal

Full-time · San Francisco, CA · $150,000 – $300,000

Modal is hiring a backend engineer to build infrastructure and developer tools for AI workloads at scale. The role suits someone comfortable across the full stack who has shipped production systems and understands observability, billing systems, or LLM inference.

Listed on Modal’s careers site · Apply there ↗

CharacterAI

Redwood City, CA · $150,000 – $300,000 · Remote

This role focuses on building scalable backend systems and applying machine learning to detect and prevent safety risks on an AI platform where users interact with characters. It suits engineers with deep expertise in distributed systems and ML who want to lead technical strategy on emerging AI safety challenges.

Listed on CharacterAI’s careers site · Apply there ↗

Astranis

Full-time · San Francisco, CA · $145,000 – $210,000

Astranis seeks a senior software engineer to build the mission-critical applications, data pipelines, and internal tools that power their satellite production operations, from CAD integration to factory-floor testbeds. This role bridges full-stack development—backend APIs, frontend UIs, data systems—with the tangible impact of seeing code directly support spacecraft manufacturing and launch.

Listed on Astranis’s careers site · Apply there ↗

York Space Systems

Full-time · San Francisco, CA · $190,000 – $260,000 · Remote

You.com is seeking a Search Engineer to design and optimize large-scale indexing systems that power their AI-driven search platform. This role suits engineers experienced in information retrieval and distributed systems who want to work on fundamental search infrastructure problems.

Listed on York Space Systems’s careers site · Apply there ↗

Zencastr

San Francisco, CA · Remote

Zencastr seeks a fullstack engineer to build high-performance podcast infrastructure in a remote, distributed team. The role suits ambitious developers who thrive on performance optimization and want to work on scalable systems at a fast-growing startup.

Listed on Zencastr’s careers site · Apply there ↗

Omiai

San Francisco, CA · $300,000

This founding engineer role involves building the full technical stack for an AI wearable platform, working directly with the founder to architect hardware, mobile, and backend systems. It's suited to experienced builders who have shipped products at scale and want significant equity and autonomy in shaping both the technology and product direction.

Listed on Omiai’s careers site · Apply there ↗

Nextdoor

San Francisco, CA

This is a general application for software engineering roles at Nextdoor, intended for candidates who didn't find a specific posted position matching their interests. It's suited for engineers interested in community-focused technology who want to express interest in any relevant opportunities the company might have.

Listed on Nextdoor’s careers site · Apply there ↗