Lead .NET Developer (Full-Stack)

CSHARK; Wrocław; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Flexible hours

Remote-first work

International projects

In-house tech workshops

Charity actions

Job summary

CSHARK is seeking a Lead .NET Engineer to join an international project focusing on developing and modernising a lending platform used by financial institutions in the UK and Europe. You will start with hands-on full-stack development across C#, .NET Framework 4.x, ASP.NET and SQL Server, including legacy Delphi 7 and VB.NET components.

Over time, you will lead technical direction, drive architectural improvements and AI adoption, mentor engineers, and collaborate with stakeholders to deliver

Qualifications

• Strong commercial experience with C# and .NET Framework 4.x.
• Advanced knowledge of SQL Server and T-SQL including stored procedures and jobs.
• Experience developing REST APIs and system integrations.
• Experience modernising complex legacy systems incrementally.
• Previous experience as Tech Lead or Software Architect with mentoring duties.

Responsibilities

• Develop and maintain a complex lending platform using C#, .NET Framework 4.x, ASP.NET and SQL Server.
• Deliver full-stack changes end-to-end from requirements to testing and code review.
• Develop and optimise T-SQL stored procedures and SQL Server Agent jobs.
• Maintain APIs, integrations and background-processing services.
• Mentor engineers and lead architectural decisions and standards.
• Collaborate with business analysts and stakeholders to deliver reliable solutions.

Skills

C#

.NET Framework 4.x

ASP.NET

SQL Server

Delphi 7

VB.NET

Angular

SignalR

REST APIs

Azure DevOps

AI-assisted development

Code review

Tools

GitHub Copilot

Claude Code

Cursor

OpenAI Codex

Job description

We arelooking tojoin anexperienced Lead .NET Engineer tojoin aninternational project focused ondeveloping andmodernising anestablished lending platform used byfinancial institutions across theUK andEurope.

Initially, you will focus onhands-on full-stack development, delivering changes across acomplex system built primarily onC#, .NET Framework 4.x, ASP.NET andSQL Server, withsome legacy components using Delphi 7 andCOM/COM+.

Overtime, your role will evolve towards technical leadership, architectural improvements andAI adoption. You will help shape theplatform’s technical direction, support theexisting development team andcontribute toits future growth.

We arelooking forsomeone whocombines strong engineering expertise withtechnical leadership experience, understands complex legacy systems andknows howtomodernise them without disrupting existing business operations.

C#

SQL

Your Daily Missions

• Developing andmaintaining acomplex lending platform using C#, .NET Framework 4.x, ASP.NET andSQL Server.
• Delivering full-stack changes end toend, fromrequirements analysis through implementation, testing andcode review.
• Developing andoptimising T-SQL stored procedures, SQL Server Agent jobs anddatabase queries.
• Maintaining APIs, integrations andbackground-processing services.
• Working withlegacy components, including Delphi 7, COM/COM+ andVB.NET, where required.
• Improving code quality, system architecture andmaintainability through incremental modernisation.
• Using AI coding assistants fordevelopment, code analysis, troubleshooting andtechnical documentation.
• Collaborating withdevelopers, business analysts andstakeholders todeliver reliable solutions.
• Gradually taking ownership oftechnical architecture, engineering standards andtheproduct’s technical direction.
• Mentoring engineers, sharing knowledge andsupporting theadoption ofAI-assisted development practices.

TheEssentials We’re Seeking

• Strong commercial experience withC# and.NET Framework 4.x, including production application development andmaintenance.
• Advanced knowledge ofSQL Server andT-SQL, including stored procedures, query optimisation andSQL Server Agent jobs.
• Experience developing andmaintaining REST APIs, system integrations andbackground-processing services.
• Experience working withcomplex legacy systems andmodernising existing applications incrementally.
• Previous experience as aTech Lead orSoftware Architect, including architectural decisions, engineering standards andmentoring developers.
• Ability totake technical ownership, influence decisions andintroduce improvements within experienced development teams.
• Practical experience using AI coding assistants (GitHub Copilot, Claude Code, Cursor, OpenAI Codex orsimilar) indaily development, including critical validation ofgenerated code.
• Commercial experience inaregulated orfinancial domain, such as lending, banking, payments, insurance, consumer credit, collections orKYC/AML.
• Understanding ofauditability, change control, data integrity andcompliance requirements inregulated environments.
• Strong analytical andproblem-solving skills, aproactive mindset andtheability towork independently.
• Experience withDelphi 7, COM/COM+, VB, VB.NET, classic ASP orXSLT.
• Knowledge ofolder Angular applications orSignalR.
• Experience withSOAP/ASMX, Windows Services, RabbitMQ, MSMQ, IBM MQ, XML orEDI.
• Experience migrating applications from.NET Framework tomodern .NET.
• Experience inlending, asset finance, consumer credit ordebt collection.
• Knowledge ofSEPA, UK Direct Debit, card payments orfinancial system integrations.
• Familiarity withIdentityServer, ASP.NET Identity, Redis, Adobe Sign orDocuSign.
• Experience withAzure DevOps, TeamCity orOctopus Deploy.
• Previous experience working inasoftware product company orsoftware vendor environment.

AtCSHARK, it’s notabout trendy perks orthelatest gaming console inthelounge. Based onfeedback fromourteam, what truly counts is anenvironment conducive tofocused work, structured processes, andcontinuous skill development. We prioritize what genuinely enriches thedaily work experience, ensuring that every moment spent withus is both productive andfulfilling.

Harness thepower oftechnology withourremote-first approach. Work fromthecomfort ofyour space while staying connected andcollaborative.

Flexible hours

Find your rhythm withhours that align toyour lifestyle. W e understand that productivity isn’t confined tothetypical 9-to-5.

International projects

Engage inprojects that transcend borders. Experience thethrill ofworking withdiverse teams andclients from different parts oftheworld. Navigate theglobal tech landscape withease. Enhance your communication skills withourtailored Business English sessions.

Navigate theglobal tech landscape withease. Enhance your communication skills withourtailored Business English sessions.

Participation in charity actions

Connect withthecommunity andcontribute tocauses that matter. Join us invarious charity initiatives andbe apart ofchange that extends beyond business.

In-house technology workshops

Stay attheforefront oftechnology. Dive deep intotopics, refine your skills, andlearn frompeers through ourregular tech workshops.

Recruitment process

01 Chat withOurRecruiter

Kick off your CSHARK adventure withaninitial interview. This is agreat opportunity forus togettoknow each other better andforyou toask anypreliminary questions.

02 Show Your skills

Depending ontherole, 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 atCSHARK

03 Meet theTeam

This is where themagic happens. Engage withapotential supervisor, your future team, or even aclient. It’s adeep dive intoyour prospective role and a chance tograsp the collaborative spirit ofCSHARK.

04 Crafting Your Offer

Once we recognize themutual fit, we’ll discuss thespecifics ofyour offer. We believe incrafting apackage that respects your skills, experience, andaspirations.

05 Onboarding Preparation

Once you’re set tojoin us, ourteam crafts atailored onboarding plan. This includes setting upyour tools andaccounts, scheduling introductions tokey team members, andorganizing orientation sessions tomake your integration seamless andefficient.

Explore theHeartbeat ofCSHARK

Discover theessence ofourguilds’ expertise, advanced tools andtech stack, andourreal-world successes. Delve intoimpactful case studies andhear genuine insights fromourteam

Wondering about ourorganizational vision, theexecutive leadership team, thevalues we passionately uphold?

Explore ourdiverse portfolio towitness ablend ofpioneering financial ® regulatory solutions, next-gen manufacturing, andinnovation examples.