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November 3, 2026
Lead Software Engineer (C#/.NET)
Senior • On-site
Warsaw, MA, Poland
Quick Facts
Role: Lead Software Engineer (C#/.NET)
Focus: Technical ownership for high-volume, distributed systems; hands-on architecture and development
Description
Lead a hands-on leadership role for scalable, reliable, high-performance distributed systems built with C#/.NET. Own technical design, code reviews, and engineering standards while mentoring a small team. Collaborate with global technology and operations teams to modernize and evolve the platform, including migration efforts toward Rust.
Responsibilities
Design and develop distributed systems using C#/.NET
Stay hands-on with software development, technical design, and code reviews
Contribute to platform modernization and migration from C#/.NET to Rust
Support integration of new products and capabilities into the platform
Define technical standards, architecture principles, and development best practices
Use AI-assisted development tools to improve productivity and delivery
Mentor engineers and provide technical guidance to a small team
Translate business requirements into technical solutions
Drive technical roadmaps balancing delivery with long-term scalability and reliability
Requirements
5+ years of professional software engineering experience with proven technical leadership
Strong expertise in C#/.NET and distributed, service-oriented architectures
Understanding of concurrent and high-performance programming
Experience designing scalable, resilient, high-volume systems
Willingness and openness to work with Rust as part of the platform’s evolution
Experience with AI-assisted software development and modern engineering practices
Knowledge of DevOps practices and tools such as Git, Jenkins, and JIRA (or similar)
Strong communication and stakeholder management skills
Experience mentoring developers or providing technical leadership
Benefits
Hands-on leadership combining architecture, delivery, and mentoring
Opportunity to modernize a critical, high-volume platform and help drive migration toward Rust
Leverage AI-assisted development tools to improve engineering productivity
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