Senior Full Stack Developer

About CoLab At CoLab, we help mechanical engineering teams bring life-changing products to market years sooner. We build AI for engineers designing cars, medical devices, and jet engines. Products this complex aren't sketched and sent to production. Teams spend months on iterations, reviews, and tests, predicting how every part performs before anything is built. CoLab is where those reviews happen, and we capture the rationale behind every change. Other tools show what changed between versions. Only CoLab knows why. That's how our AI helps manufacturers like Bobcat, Triumph Motorcycles, and GE Appliances make better decisions, eliminate rework cycles, and get to market faster. Proudly based in St. John’s, Newfoundland, CoLab started with one customer in 2018. Since then we’ve raised a $72M Series C , been named the 57th fastest growing company in North America by Deloitte ( Fast 500™ ), signed multi-year AI partnerships with companies like Bombardier , and grown to a team of 250+. About the Role: Mechanical engineering teams rely on a complex ecosystem of CAD, PLM, and enterprise systems to design, review, and manufacture products. At CoLab, we're building software that fits naturally into those workflows. As a Senior Full Stack Developer, you'll play a key role in making that possible. You'll build the integrations and platform capabilities that connect CoLab with the systems our customers use every day, helping engineering organizations review designs faster, collaborate more effectively, and make better decisions throughout the Mechanical Engineering Lifecycle. This role is a great fit for someone who enjoys solving technically challenging integration problems. Ideally you’ve spent your career building web applications and focused within heavy integrations. You'll work closely with Product, Design, Customer Success, and fellow engineers to translate real customer challenges into scalable software. One week you might be improving how CoLab integrates with a CAD application. The next, you could be investigating a complex customer workflow spanning PLM, ERP, and engineering data to eliminate friction for thousands of engineers. Job Responsibilities Understand complex customer problems and requirements and work in a team to build a solution that adds value for the customer and the product as a whole Collaborate with other team members to design and plan complex scopes of work from product requirements and UI/UX designs Develop, test, and ship critical user-facing features on a regular basis Develop, test, and maintain robust and scalable APIs. Participate in code reviews and help your team deliver high-quality software Champion all aspects of the user’s experience, with a focus on clarity and speed Contribute to tech technology direction and best practices Mentor, support, and be an information source to junior developers Qualifications 8+ years of professional, hands-on development experience Experience working on SaaS, large-scale distributed systems Consistent track record of building and maintaining highly scalable products Proficient with Java and / or C# Experience with version control, release management, and CI/CD workflows Exposure to Javascript/Typescript, Python, HTML and CSS is considered an asset Experience with front-end build, package-management & testing tools such as Webpack, NPM, Jest, Cypress, etc Experience writing robust automated tests, including unit and integration tests using Jest, as well as end-to-end (E2E) tests using Cypress or Playwright. Hands-on experience with relational databases (e.g., PostgreSQL, MySQL), NoSQL databases (e.g.: DynamoDB) and querying frameworks/APIs. Experience with Git workflow (pull requests, code reviews) Passion for working in teams with emphasis on respect and continuous improvement Willingness to raise your hand when you see something could be done / built better Extra Details Compensation: This is a full-time, permanent position with an attractive compensation package…