— Senior Full Stack Engineer (.NET + React)

Senior Full Stack Engineer (.NET + React)

About the Role

Our client is an invest-tech product company building next-generation software for Private Equity, Venture Capital, and Fund Administrators. The platform replaces fragmented, legacy fund operations with scalable core systems and AI-powered workflows embedded directly into real business processes.

This is a product engineering role, not an outsourcing setup. There are no long spec documents or ticket factories. Engineers are trusted with context, real problems, and responsibility for delivering outcomes.

You’ll work closely with product managers, designers, and sometimes clients to design, build, and evolve a complex platform used by investment professionals every day.

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What You’ll Do

• Own features end to end — from understanding the business problem to solution design, implementation, deployment, and iteration

• Design and build backend services using .NET / C#, hosted in Azure

• Develop modern frontend features using React + TypeScript

• Work with both SQL and NoSQL databases (SQL Server, MongoDB)

• Contribute to the evolution of the platform architecture and technical standards

• Build and integrate AI-powered workflows that support complex private equity operations, using existing AI services and tooling where appropriate

• Collaborate closely with product managers, designers, and stakeholders to shape solutions, not just implement requirements

• Take responsibility for testing, CI/CD, releases, and production readiness

• Continuously improve performance, reliability, observability, and developer experience

• Use modern AI-assisted coding tools as part of daily engineering work

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What We’re Looking For

• 5–7+ years of professional experience as a software engineer

• Strong hands-on experience with .NET / C# and React + TypeScript

• Experience building and operating real production systems (not just isolated components)

• Solid understanding of system design, architecture, and trade-offs

• Comfort working with incomplete requirements and asking the right questions

• Experience with Azure or similar cloud platforms

• Practical experience with CI/CD, automated testing, and deployments

• Product-oriented mindset — focus on user value and business outcomes

• Active, practical use of AI tools in daily development

• Upper-Intermediate English or higher

Nice to have (not required):

• Fintech / invest-tech background

• Experience in client-facing or stakeholder discussions

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Contract & Employment

• Flexible engagement models depending on location:

  • Employment via local entity or EOR (EU)

  • B2B possible where applicable

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Compensation & Benefits

• Competitive market-level compensation based on experience and location

• Unlimited vacation policy (with healthy usage encouraged)

• Full equipment provided

• Paid access to modern AI tools, learning resources, and subscriptions

• Support for continuous learning and professional development

• Strong engineering culture with high trust and autonomy

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Why This Role

• High ownership and real influence on product direction

• Engineers are trusted to think, design, and decide - not just execute

• AI is a real working tool and part of the product, not a buzzword

• Long-term product vision with solid business fundamentals

• Team of experienced engineers who value outcomes over process

• Relocation support to Warsaw or Madrid.

Hiring Steps

• Recruiter Screen with VP Team – short intro call to align on experience, mindset, location, and compensation

• Hiring Manager Interview – product- and case-focused discussion with an Engineering Manager (no take-home task)

• Technical Interviews – backend(1,5 hours) + frontend(1,5 hours) sessions with the engineering team

• Final Conversation – culture fit and mutual alignment with CPO and Founder

• Offer