Lead .NET Developer (Full-Stack)
- Remote
- Wrocław
- Bielsko-Biała
- Lead 160 - 190 PLN/h + VAT B2B
Unfolding Your Next Role
We are looking for an experienced Lead .NET Engineer to join an international project focused on developing and modernising an established lending platform used by financial institutions across the UK and Europe.
Initially, you will focus on hands-on full-stack development, delivering changes across a complex system built primarily on C#, .NET Framework 4.x, ASP.NET and SQL Server, with some legacy components using Delphi 7 and COM/COM+.
Over time, your role will evolve towards technical leadership, architectural improvements and AI adoption. You will help shape the platform’s technical direction, support the existing development team and contribute to its future growth.
We are looking for someone who combines strong engineering expertise with technical leadership experience, understands complex legacy systems and knows how to modernise them without disrupting existing business operations.
Tech & Tool Stack
C#
.NET Framework
SQL
Your Daily Missions
- Developing and maintaining a complex lending platform using C#, .NET Framework 4.x, ASP.NET and SQL Server.
- Delivering full-stack changes end to end, from requirements analysis through implementation, testing and code review.
- Developing and optimising T-SQL stored procedures, SQL Server Agent jobs and database queries.
- Working with ASP.NET MVC/WebForms, JavaScript, jQuery, AJAX and Bootstrap.
- Maintaining APIs, integrations and background-processing services.
- Working with legacy components, including Delphi 7, COM/COM+ and VB.NET, where required.
- Improving code quality, system architecture and maintainability through incremental modernisation.
- Using AI coding assistants for development, code analysis, troubleshooting and technical documentation.
- Collaborating with developers, business analysts and stakeholders to deliver reliable solutions.
- Gradually taking ownership of technical architecture, engineering standards and the product’s technical direction.
- Mentoring engineers, sharing knowledge and supporting the adoption of AI-assisted development practices.
The Essentials We’re Seeking
- Strong commercial experience with C# and .NET Framework 4.x, including 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 modernising existing applications incrementally.
- Previous experience as a Tech Lead or Software Architect, including architectural decisions, engineering standards and mentoring developers.
- Ability to take technical ownership, influence decisions and introduce improvements within experienced development teams.
- Practical experience using AI coding assistants (GitHub Copilot, Claude Code, Cursor, OpenAI Codex or similar) in daily development, including critical validation of generated code.
- Commercial experience in a regulated or financial domain, 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, a proactive mindset and the ability to work independently.
- Strong written and spoken English (B2+ minimum, C1 preferred).
Nice-to-haves
- 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 working in a software product company or software vendor environment.
Our
Benefits
At CSHARK, it’s not about trendy perks or the latest gaming console in the lounge. Based on feedback from our team, what truly counts is an environment conducive to focused work, structured processes, and continuous skill development. We prioritize what genuinely enriches the daily work experience, ensuring that every moment spent with us is both productive and fulfilling.
100% remote work
Harness the power of technology with our remote-first approach. Work from the comfort of your space while staying connected and collaborative.
Flexible hours
Find your rhythm with hours that align to your lifestyle. We understand that productivity isn’t confined to the typical 9-to-5.
International projects
Engage in projects that transcend borders. Experience the thrill of working with diverse teams and clients from different parts of the world.Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Business english lessons
Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Participation in charity actions
Connect with the community and contribute to causes that matter. Join us in various charity initiatives and be a part of change that extends beyond business.
In-house technology workshops
Stay at the forefront of technology. Dive deep into topics, refine your skills, and learn from peers through our regular tech workshops.
100% remote work
Harness the power of technology with our remote-first approach. Work from the comfort of your space while staying connected and collaborative.
Flexible hours
Find your rhythm with hours that align to your lifestyle. We understand that productivity isn’t confined to the typical 9-to-5.
International projects
Engage in projects that transcend borders. Experience the thrill of working with diverse teams and clients from different parts of the world.Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Business english lessons
Navigate the global tech landscape with ease. Enhance your communication skills with our tailored Business English sessions.
Participation in charity actions
Connect with the community and contribute to causes that matter. Join us in various charity initiatives and be a part of change that extends beyond business.
In-house technology workshops
Stay at the forefront of technology. Dive deep into topics, refine your skills, and learn from peers through our regular tech workshops.
Recruitment process
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Chat with Our Recruiter
Kick off your CSHARK adventure with an initial interview. This is a great opportunity for us to get to know each other better and for you to ask any preliminary questions.
Show Your skills
Depending on the role, you’ll either engage in a technical interview or take on a specific task. This stage allows us to understand your expertise and offers you a glimpse into the challenges you might tackle at CSHARK
Meet the Team
This is where the magic happens. Engage with a potential supervisor, your future team, or even a client. It’s a deep dive into your prospective role and a chance to grasp the collaborative spirit of CSHARK.
Crafting Your Offer
Once we recognize the mutual fit, we’ll discuss the specifics of your offer. We believe in crafting a package that respects your skills, experience, and aspirations.
Onboarding Preparation
Once you’re set to join us, our team crafts a tailored onboarding plan. This includes setting up your tools and accounts, scheduling introductions to key team members, and organizing orientation sessions to make your integration seamless and efficient.
Explore the Heartbeat of CSHARK
Discover the essence of our guilds’ expertise, advanced tools and tech stack, and our real-world successes. Delve into impactful case studies and hear genuine insights from our team
Get to Know How We Work