Senior C++ Engineer (Desktop Applications)

Sigma Software Group • German • English • Bachelor's Degree • C++ • 16 days ago

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Salary

≈ $60k – $92k per year (Estimated)

Location

Remote (Poland)

Seniority

Senior · 5+ years exp

Employment

Full-Time

Confirmed on the employer's own hiring board on Sep 24, 2026. First seen by Alion on Sep 9, 2026.

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Sigma Software Group

Sigma Software is a technology services company founded in 2002 as the Ukrainian development arm of the Swedish Sigma Group, and now a global organisation with delivery centres in Ukraine, Poland, Sweden, the United States and Latin America. It builds custom software for clients in advertising technology, automotive, aviation, gaming, telecommunications and the public sector, and runs its own product and startup arms alongside the services business. The company is known for keeping its Ukrainian engineering operation running through the war and for a substantial programme of technology work supporting Ukrainian defence and public institutions.

sigma.software • HQ: Stockholm, Sweden • HQ: Kharkiv, Ukraine • Custom Software Development • Information Technology • IT Outsourcing • IT Consulting • Software • 1001-5000 employees • Est. 2002

We are looking for an experienced Senior C++ Engineer to work on large-scale desktop software products in Medical domain. The role focuses on performance optimization, stability improvements, modernization of legacy systems, and development of high-quality desktop applications.

Develop and maintain high-quality desktop application components using modern C++
Implement scalable multithreading and concurrency solutions
Analyze, identify, and resolve performance bottlenecks in complex desktop systems
Participate in modernization and refactoring of legacy codebases
Collaborate with architects, QA engineers, and product teams to deliver stable and efficient solutions
Contribute to software quality improvements, debugging activities, and system stability initiatives
Utilize AI-assisted development tools to improve development workflows and accelerate implementation activities
Participate in technical discussions, code reviews, and engineering best practices initiatives

5+ years of commercial experience in C++ software development
Strong expertise in modern C++ standards including C++14/17/20
Deep understanding of multithreading, concurrency, debugging, and performance optimization
Hands-on experience with desktop application development
Practical experience with Qt
Experience working with Make, Conan, and MSVC
Experience with CEF integration
Strong analytical thinking and problem-solving skills
Ability to collaborate effectively within cross-functional engineering teams
Upper-Intermediate or higher level of English
WILL BE A PLUS
- Experience with AI-assisted coding tools and development workflows
- Experience working in regulated software environments
- Technical degree in Computer Science, Engineering, or related field
- German language skills

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