Senior Software Engineer

Software Engineer - Careers - Mixedbread

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Software Engineer

Engineering, Full-time

San Francisco, CA

ApplyWe encourage you to apply even if you don't meet 100% of the requirements

Build the infrastructure that makes AI search instant. Our search API handles millions of queries across 100+ languages, our models run on everything from phones to GPUs, and our stores need to be faster than thought.

About the role

We're looking for a Senior Software Engineer to join our core engineering team. You'll be working on the foundational infrastructure that powers our AI search and embedding services, handling millions of requests daily. This role combines systems programming, distributed computing, and machine learning engineering to build products that redefine how developers interact with AI.

What you'll do

• Design and implement scalable backend services that handle millions of embedding and search requests
• Optimize our vector database for sub-millisecond query performance at scale
• Build and maintain our model serving infrastructure across multiple deployment targets
• Collaborate with ML engineers to productionize new models and algorithms
• Improve observability and reliability of our distributed systems
• Mentor junior engineers and contribute to technical architecture decisions
• Write clean, maintainable code with comprehensive test coverage

What we're looking for

• Strong experience with Python, Go, or Rust in production environments
• Deep understanding of distributed systems and database internals
• Experience with vector databases, search engines, or ML infrastructure
• Track record of building and scaling high-performance systems
• Excellent communication skills and ability to work in a remote-first environment
• Bachelor's degree in Computer Science or equivalent practical experience

Nice to have

• Experience with ONNX, TensorRT, or other model optimization frameworks
• Contributions to open-source projects in ML or infrastructure
• Knowledge of transformer architectures and embedding models
• Experience with Kubernetes, Ray, or similar orchestration systems
• Background in information retrieval or natural language processing

What We Offer

• Competitive compensation + equity
• Comprehensive health, dental, and vision coverage
• Visa sponsorship + relocation support
• Professional development budget
• Access to the best AI tools and subscriptions
• Team off-sites + conference attendance
• Transportation support
• Wellness support, including gym membership and sports club subscriptions
• Food support

Mixedbread is an equal opportunity employer committed to building a diverse and inclusive team. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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Join us in building the future of search.

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