Senior Back End​/Full Stack Engineer

About Common Wealth

Common Wealth is Canada’s fastest growing group retirement provider. Our award‑winning digital platform helps Canadians plan, save, and build secure retirement income. We partner with a nationwide network of advisors and employers, empowering them with modern tools and insights. We are driven by a mission to make financial security in retirement more accessible to everyone.

We are looking for an experienced Senior Back End Engineer to join Common Wealth’s engineering team. You will play a key role in building and scaling the technology that powers our retirement platform to help us drive toward a future where every Canadian can achieve financial security in retirement. Experience in fintech is a strong plus.

In this role, the focus will be on Back End (with Java/Kotlin, Postgre

SQL, AWS) to develop robust, scalable back‑end systems; if you are also comfortable and experienced as Full Stack (with React/TS Front End), even better! We value engineers who can move fluidly across the stack and collaborate closely with front‑end, product, and design teams.

• Write, maintain and deliver code that deliver business objectives. You build product with a strong understanding of both customer and business needs. You will think critically about data modeling, service architecture, and long‑term maintainability. You’ll balance short‑term speed with thoughtful investment in areas that are core to the platform.

• Apply testing frameworks. All developers are responsible for the quality of the product, and to that end are responsible for writing their own unit and integration tests. You will help to continuously improve our test quality to maintain the stability of our platform.

• Embrace a Dev Ops philosophy. Our infrastructure is fully cloud‑based and managed using infrastructure‑as‑code tools (CDK, Cloud Formation). You are comfortable working with various AWS tools & offerings. Engineers are expected to understand how their code operates in production and to consider cost, scalability, monitoring, and security when building new infrastructure.

• Project delivery. Work within a talented cross‑functional team, collaborating closely with product and design. You will help shape technical requirements, brainstorm solutions, break down deliverables into milestones, and drive timelines to completion.

• Technical Ownership:
  Provide technical guidance through code reviews and mentorship. You’ll help identify gaps, address issues proactively, and lead continuous improvements across the engineering team.

• Experienced back end engineer:
  You have 6+ years of experience and you’ve worked on production systems and have a track record of complex project deliveries. You have experience building scalable systems in Java and/or Kotlin, using relational databases like Postgre
  
  SQL. You’re skilled at translating product requirements into functional, reliable code, and you’ve tackled tough challenges related to scalability and performance. You understand the underlying fundamentals and apply them thoughtfully.

• Skilled in end‑to‑end delivery:
  You think holistically about solutions – from data modeling in the database, back‑end logic, to how everything integrates with the front‑end. You have experience maintaining infrastructure in AWS, and bonus points if you’re also comfortable with front‑end development using React and Type Script.

• Lead through your work and level up others:
  As a senior member of the team, you take ownership of product and technical direction. You lead by example, mentor others, and drive continuous improvement in both the product and the team. You find fulfillment in helping others grow and actively share your knowledge.

• Impact driven:
  You care deeply about the impact of your work. You take the time to understand the business context and user needs, and you’re motivated by building applications that contribute meaningfully to the company’s success and delight our users.

• Resourceful and well‑rounded:
  You understand that building a great product goes beyond writing code. You’re familiar with the tools and practices that keep production systems running smoothly in the real…