Senior Fullstack Developer/Team Lead Role (C#, Blazor, Entity Framework Core, SQLite) (Remote)

Datafin Recruitment · Johannesburg, Gauteng

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ENVIRONMENT

Our client is a leading UK-based esports and sim racing company specializing in tailored car setups, professional coaching, and advanced telemetry solutions.
Operating within the internet software and services sector, the company leverages a growing, innovative team to deliver high-quality racing tools and resources designed to support drivers of all skill levels.
They are seeking a Senior Full Stack Developer / Team Lead to join their fully remote team and take ownership of two key products. The first is an established desktop application built using WPF, C#, Blazor, Entity Framework Core, and SQLite.
The second is a rapidly expanding cloud platform developed with ASP.NET Core, C#, Blazor, and Entity Framework Core, utilizing Microsoft SQL Server and hosted on a cloud-based infrastructure.
This role offers the opportunity to lead technical development, drive product innovation, and mentor a growing engineering team while contributing to the continued success of both platforms.

Lead development across the WPF + Blazor desktop application and the cloud platform ASP.NET Core, Blazor, EF Core, MSSQL.
Develop new features, fix bugs, and maintain a clean, high-performance codebase across both products.
Mentor and support team members: unblock issues, review code, raise the technical bar, and guide the team on leveraging AI coding tools effectively.
Manage ticket intake: triage, prioritise, and assign incoming bugs and feature requests to the team.
Communicate directly with customers on ticket status, resolutions, and expectations.
Work directly with the CTO on technical direction, goals, and delivery.
Implement backend logic and business processes.
Design and manage database schemas across SQLite desktop and MSSQL cloud.
Write and maintain database migrations.
Optimise database queries for performance at scale.
Enhance and maintain CI/CD pipelines for both desktop and cloud deployments.
Improve performance, reliability, and overall user experience.
Contribute across the full technology stack frontend, backend, database, and infrastructure.

Senior-level experience as a Full Stack Developer, with prior team lead or mentorship experience.
Strong proficiency in C#, ASP.NET Core, Blazor, and Entity Framework Core.
Proficiency in AI-assisted coding: Strong experience leveraging advanced AI development tools, specifically Claude Code—to accelerate development cycles, refactor efficiently, and improve codebase quality.
Solid experience with both SQLite and Microsoft SQL Server, including schema design, migrations, and query optimisation.
Experience building and operating cloud-hosted applications.
Proven ability to triage, prioritise, and delegate work across a development team.
Strong written and verbal communication skills, including customer-facing communication on issues and resolutions.
Experience with CI/CD and performance optimisation.

Ability to work remotely and manage your own time and the team's workload autonomously.
Strong problem-solving skills and attention to code quality.
Passion for clean, maintainable, and efficient code.
Bonus: Interest or passion for sim racing or motorsport.