Lead .NET Developer (Full-Stack)

CSHARK is hiring an experienced Lead .NET Engineer for an international project focused on developing and modernising a lending platform used by financial institutions across the UK and Europe.

• Strong commercial experience with C# and .NET Framework 4.x in production application development and maintenance.
• Advanced knowledge of SQL Server and T-SQL, including stored procedures, query optimisation, and SQL Server Agent jobs.
• Hands-on experience with ASP.NET MVC or WebForms and frontend technologies such as JavaScript, jQuery, AJAX, and Bootstrap.
• Experience developing and maintaining REST APIs, system integrations, and background-processing services.
• Experience working with complex legacy systems and incrementally modernising existing applications.
• Previous experience as a Tech Lead or Software Architect, including architectural decisions, engineering standards, and mentoring.
• Ability to take technical ownership, influence decisions, and introduce improvements in experienced development teams.
• Practical experience using AI coding assistants (e.g., GitHub Copilot, Claude Code, Cursor, OpenAI Codex).
• Commercial experience in regulated or financial domains such as lending, banking, payments, insurance, consumer credit, collections, or KYC/AML.
• Understanding of auditability, change control, data integrity, and compliance requirements in regulated environments.
• Strong analytical and problem-solving skills and ability to work independently.
• Strong written and spoken English (minimum B2, preferred C1).

Nice to have:

• Experience with Delphi 7, COM/COM+, VB, VB.NET, classic ASP, or XSLT.
• Knowledge of older Angular applications or SignalR.
• Experience with SOAP/ASMX, Windows Services, RabbitMQ, MSMQ, IBM MQ, XML, or EDI.
• Experience migrating applications from .NET Framework to modern .NET.
• Experience in lending, asset finance, consumer credit, or debt collection.
• Knowledge of SEPA, UK Direct Debit, card payments, or financial system integrations.
• Familiarity with IdentityServer, ASP.NET Identity, Redis, Adobe Sign, or DocuSign.
• Experience with Azure DevOps, TeamCity, or Octopus Deploy.
• Previous experience in a software product company or software vendor environment.

• Develop and maintain a complex lending platform using C#, .NET Framework 4.x, ASP.NET, and SQL Server.
• Deliver full-stack changes from requirements analysis through implementation, testing, and code review.
• Develop and optimize T-SQL stored procedures, SQL Server Agent jobs, and database queries.
• Work with ASP.NET MVC/WebForms, JavaScript, jQuery, AJAX, and Bootstrap.
• Maintain APIs, integrations, and background-processing services.
• Work with legacy components including Delphi 7, COM/COM+, and VB.NET where required.
• Improve code quality, system architecture, and maintainability through incremental modernisation.
• Use AI coding assistants for development, code analysis, troubleshooting, and technical documentation.
• Collaborate with developers, business analysts, and stakeholders.
• Take ownership of technical architecture, engineering standards, and product technical direction.
• Mentor engineers and support adoption of AI-assisted development practices.

Candidates must consent to personal data processing according to GDPR and CSHARK policies, with detailed privacy information provided. Data processing is necessary for recruitment under EU regulations and Polish labor law. Data may be stored and processed within the EEA and possibly transferred under adequate protection to third countries. Consent can be withdrawn at any time.