Senior Full Stack Developer

About CoLab

At CoLab, we help mechanical engineering teams bring life-changing products to market years sooner.

CoLab is the AI platform for driving stronger engineering decisions. Every design review in CoLab builds a knowledge repository of design feedback, decisions, and lessons learned - which AI agents draw from to flag issues on future designs before they compound. The more your team works in CoLab, the smarter it gets and the faster you arrive at the ideal design.

About the Role

We’re looking for a Senior Full Stack Developer who naturally gravitates toward backend systems and infrastructure, but enjoys owning product experiences end-to-end.

At CoLab, full stack developers are deeply involved in shaping the product — not just implementing tickets. You’ll work closely with Product, Design, AI, and fellow developers to solve complex technical problems that directly impact how engineering teams collaborate and make decisions.

Depending on the team you join, your work could involve building scalable APIs, improving system reliability, designing data-heavy workflows, integrating AI-powered capabilities, or developing intuitive frontend experiences for highly technical users.

This is a role for someone who likes difficult problems and meaningful ownership. The work is often ambiguous. Priorities evolve as we learn. You’ll be expected to make thoughtful technical decisions, communicate clearly, and move work forward without waiting for perfect direction.

Some developers prefer staying narrowly specialized. That’s not this role. We’re looking for someone who enjoys understanding the full system — from infrastructure and services to the customer experience sitting on top of them.

Our Ideal Candidate

You’re a strong backend engineer who’s comfortable contributing across the stack when needed.

You care about building reliable systems, but you also understand that great software only matters if it solves real customer problems. You know how to balance speed, scalability, and maintainability without becoming dogmatic about any of them.

You likely won’t enjoy this role if:

• You prefer highly scoped work with minimal ambiguity
• You only want to work in one layer of the stack
• You optimize for technical perfection over iteration and learning

You’ll thrive if:

• You enjoy owning problems end-to-end
• You’re curious about both systems architecture and product experience
• You communicate clearly and collaborate well across disciplines
• You hold a high technical bar while staying pragmatic and low ego

Job Responsibilities

• Design, build, and maintain scalable backend services, APIs, and data systems
• Contribute to frontend application development using modern web technologies
• Collaborate cross-functionally with Product, Design, AI, and Engineering teams to ship high-impact product improvements
• Improve system reliability, observability, performance, and developer tooling
• Help shape technical direction, architecture decisions, and engineering best practices
• Investigate and resolve complex production issues across the stack
• Prototype quickly, gather feedback, and iterate based on customer and business needs
• Mentor developers through collaboration, code reviews, and technical discussions