Senior Software Engineer, Product AI, Brex, WA, US

Why This Opportunity: 

Brex is pioneering the next wave of AI-driven financial services for dynamic, high-impact companies like Coinbase, Robinhood, and Anthropic. We're at the early stages of integrating AI across our product suite, and we believe that the most transformative innovations will come from individuals who intuitively understand this new medium.

We're seeking a Senior Software Engineer to be catalysts for an AI-first culture at Brex. This isn’t your traditional ML or research position—we want proactive builders who demonstrate the capabilities of LLMs by creating, not just discussing. With no red tape, you'll have the freedom to experiment quickly and the support to bring bold ideas to life. Apply now to join our team that’s actively shipping product AI features today, and help shape a role that evolves with your growth, teaching us new insights along the way!

Engineering @ Brex

We believe that engineers should accelerate the business through technology, and collaborate across multiple teams to accomplish that. Teams are autonomous, value inclusivity, eager to learn, teach and constantly improve how things work. The software we build today is the foundation for dozens of Brex systems in the future, so engineers have a strong sense of ownership and accountability and take pride in their craft.

What You’ll Do

• Build and ship AI-first product features that feel magical, not incremental.
• Use LLMs as your default medium for creating tools, interfaces, and internal agents.
• Collaborate with product, design, and engineering to push the boundaries of what’s possible with AI.
• Contribute to shaping our AI engineering culture by being visible and outspoken—internally and externally.
• Reinforce Brex’s position as the company hiring the best AI builders in the world.

Responsibility

• Drive AI-led advancements by building innovative 0-1 full-stack products in the agents space.
• Develop and launch cutting-edge product features using LLMs and agents
• Propose and integrate novel features leveraging LLMs to enhance our platform.
• Create an industry-leading AI-native experience in financial software and services.
• Independently lead AI projects, showcasing initiative and creative problem-solving.
• Design, execute, and analyze product experiments to fuel continuous improvement.

Requirement

• A demonstrated expertise of LLMs and agentic workflows. You’ve built agentic products or agentic systems.
• A builder first mentality. You live in your code editor. Your instincts lean toward “let’s try it,” not “let’s talk about it.”
• Obsessively data-driven with strong taste. You curate clean, reliable datasets and pair quantitative rigor with good judgment. You know when to measure everything and use it to guide your decisions.

Bonus Points:

• Founder or Founding Engineer of a venture-backed AI startup with a proven history of creating successful AI-driven products from scratch.
• Passionate about taking on diverse roles, from developing functional product prototypes and designing intuitive UIs to steering product strategy, all to bring innovative AI solutions to life.

Hybrid Policy

• This role will be based in our either our San Francisco, New York, or Seattle office. We are a hybrid environment that combines the energy and connections of being in the office with the benefits and flexibility of working from home. We currently require a minimum of two coordinated days in the office per week, Wednesday and Thursday. As a perk, we also have up to four weeks per year of fully remote work!

Compensation

• The expected salary range for this role is $192,000 - $240,000 + equity. However, the starting base pay will depend on a number of factors including the candidate’s location, skills, experience, market demands, and internal pay parity.