C# Developer

About the Role You’ll join a product engineering team at a leading fintech company. Most of your time goes to building and improving backend services on .NET and Azure. You’ll also help with front-end work when the team needs it. We want a self-starter who already uses AI in their day-to-day engineering and takes ownership without waiting to be told. What You’ll Own Backend Design, build and maintain Web APIs and middle-layer services in C# / .NET Core Write and tune SQL Server queries, and troubleshoot and debug existing stored procedures and indexes Build message-driven flows with Azure Service Bus and RabbitMQ Deploy and run services on Azure PaaS (Web Apps, Functions) Add logging, monitoring and unit tests (with mocks) so services are reliable in production Front-End Support Support UI changes and fixes in React when the team needs it Work with front-end teammates on API contracts and integration Core Tech Stack Backend: C#, .NET / .NET Core, Web API, Entity Framework, LINQ Data: SQL Server (queries, optimization, stored procedures, indexing) Cloud (Required): Azure Web Apps, Azure Functions, Azure Service Bus Messaging: RabbitMQ or another queue mechanism Quality: Unit testing with mocking, design patterns, logging and monitoring Required Experience 3–5 years with .NET / .NET Core 3+ years with C# 1+ year building Web APIs 2+ years with SQL Server as a backend developer (strong queries and optimization, not a DBE role) Hands-on experience with Azure PaaS services Basic understanding of design patterns Uses AI tools in daily development work Nice to Have React Docker / Kubernetes Soft Skills Curious: Asks why, digs into unfamiliar code and business rules, and keeps learning new tools, AI included Comfortable with ambiguity: Makes progress with incomplete requirements, makes sensible assumptions, and confirms them early Proactive communicator: Raises risks and blockers early and explains technical trade-offs clearly to the team and stakeholders Ownership: Follows work through to production without waiting to be told what’s next Ideal Candidate You’re a senior backend engineer who can take a small-to-medium feature from design to production with little oversight. You’re naturally curious: you like understanding how a system works and why it was built that way. You stay effective when requirements are unclear or keep changing. You’re comfortable with Azure and can trace a slow query or a broken stored procedure without getting lost. You aren’t a front-end specialist, but you can work in a React codebase when the team needs help. You keep learning on your own, you already use AI to work faster, and you raise problems early. Countries: Colombia, Mexico, Paraguay … mais