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Open nowPosted 10 days ago

Senior Software Developer (C#/.NET and React)

Calliere58 open roles

Where
Remote
Work mode
Remote
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Your applicationOpen nowSenior Software Developer (C#/.NET and React)Calliere · Remote

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Early applications get read.

14.0% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.3%1 day
  2. 4.7%3 days
  3. 14.0%7 days
  4. 22.5%14 days
  5. 38.3%30 days
  6. 59.0%60 days
This job: posted 10 days ago

The posting

Senior Software Developer (C#/.NET and React) Remote, Canada (occasional in-person team days in the Greater Toronto Area) Full-time, permanent About the company Our client is an established, mission-driven Canadian technology organization. They run a high-traffic online payments platform used by thousands of organizations and a large base of individual users across the country. The engineering team is small enough that senior people have real influence, and the culture is collaborative, flexible and focused on doing work that matters. The role This is a senior hands-on engineering position. You will take large, sometimes loosely defined features and carry them all the way through: shaping the requirements, designing the solution, building it, testing it, shipping it and supporting it in production. The stack is a C#/.NET back end with a React front end. You will be expected to make sound calls on your own, balance short-term delivery against long-term code health, and raise the level of the developers around you through reviews, mentoring and good technical conversation. You will work day to day with a Technical Lead, Product, QA and DevOps, and you should care about the "why" behind what the team builds, not only the "what" and "how". What you will do; Building and shipping - Take ownership of complex features from early design through to production support - Turn half-formed problems into clear, well-scoped technical work - Write clean, secure, maintainable and well-tested code on both the front end and back end - Flag risks, dependencies and blockers early in planning rather than late in delivery - Dig into production issues on your own and fix root causes, not symptoms Technical design - Lead design at the feature level, covering APIs, data models and integrations - Weigh trade-offs and recommend practical solutions - Bring in the Technical Lead and architecture group when a decision has wider system impact - Champion good practice around security, testing, observability, performance and documentation - Simplify where possible, automate repetitive work and make life easier for other developers - Build front-end experiences that are accessible, semantic and standards-compliant, with usability and SEO considered from the start Raising the team - Give thorough code reviews that look at correctness, design, security and maintainability - Mentor other developers and help them grow more independent - Share what you know through documentation, pairing, demos and workshops - Influence how the wider team handles recurring technical problems - Help improve how the team works, not just what it delivers Requirements - Around 6 or more years building and supporting complex production systems (what you have delivered matters more than the exact number) - Strong C# and .NET skills, including RESTful APIs and back-end services - Solid working knowledge of React and TypeScript/JavaScript - Experience with relational databases such as SQL Server - A history of troubleshooting production problems independently and leading design decisions - Good technical judgment and comfort working through ambiguity Nice to have - Azure or another major cloud platform - Automated testing and modern CI/CD - Background in payments, fintech or another security-sensitive field - Experience mentoring developers or building a strong code review culture This is a current, open position. Our client is committed to an inclusive workplace and welcomes applicants from all backgrounds. All hiring decisions are made by people.

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