Middle C# Developer

AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards. Why join us If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you! :) About the role We are looking for a C# Developer to contribute to the development and maintenance of an application-protection product built on C# and IL. This person works alongside two senior engineers on implementation and problem-solving, building familiarity with obfuscation and runtime protection. Comfort supervising AI-assisted development and verifying results is part of the role. What you will do Contribute to development and maintenance of Dotfuscator, PreEmptive's C# and IL-focused application-protection product. Work alongside two senior engineers to implement product changes and solve technical problems. Build understanding of the product's obfuscation and runtime-protection context, including its interaction with customer application builds. Break down implementation tasks and seek clarification from teammates when requirements or technical approaches are unclear. Use Claude Code in daily development while retaining responsibility for reviewing and verifying the resulting implementation. Contribute to adjacent technical tasks when required, using investigation, collaboration, and AI assistance to work beyond the primary stack. Must haves Hands-on C# software engineering skills at a mid-level proficiency, of at least 3 years. Ability to work collaboratively with senior engineers on product implementation and technical problem-solving. Critical thinking: break problems into clear steps, identify gaps in understanding, and ask useful questions of teammates and AI agents. Ability to supervise AI-assisted development, review generated code, and verify that implementations achieve the intended result. Willingness to learn and contribute outside the primary stack, including C++ packages, front-end tasks, and CI/CD, when needed. Upper-Intermediate English level. Nice to haves Familiarity with .NET Intermediate Language (IL) and how C# applications are built and executed. Experience with code obfuscation, runtime protection, or application-security tooling. Experience with command-line tools and build-process integrations. Perks and benefits Professional growth : Accelerate your professional journey with mentorship, TechTalks, and personalized growth roadmaps; Competitive compensation : We match your skills and contributions with USD-based compensation and budgets for education, fitness, and team activities; A selection of exciting projects : Work with Fortune 500 enterprises and leading product brands using modern solutions; Flextime : Flexible schedule with remote and office options for work-life balance; Meet Our Recruitment Process Asynchronous stage – An automated, self-paced track that helps us move faster and give you quicker feedback: Short online form to confirm basic requirements 30–60 minute skills assessment 5-minute introduction video Synchronous stage – Live interviews Technical interview with our engineering team (scheduled at your convenience) Final interview with your future teammates If it’s a match—you’ll get an offer! Tech stack English C1 C# regular AI regular .NET C# regular Office location Warszawa 00-002 Porto 4000-000 Madrid 28022 Poznań 60-001 Published: 28.09.2026 About the company AgileEngine We build products for companies in 17+ industries — solving real problems and improving millions of lives worldwide. Here, your voice matters, your work creates impact, and your growth is part of our journey together. Company profile Similar offers Montrose Software (Polska) Sp.z.o.o Kraków Remote Remote C# Developer New 2 284,72 - 4 569,44 EUR/month (depends on contract) C# .Net SQL Mid Mid B2B, Permanent B2B, Permanent Full-time Full-time New Axence Kraków Remote Remote .NET Developer New 2 733,49 - 4 555,81 EUR/month (depends on contract) Microsoft Azure C# PostgreSQL REST API .Net Mid Mid B2B, Permanent B2B, Permanent Full-time Full-time New Upvanta sp. z o.o. 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