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November 3, 2026
Senior Backend Developer (Tech Lead)
Senior • Remote
Warsaw, Poland
Quick Facts
Role: Senior Backend Developer (Team Lead / Tech Lead)
Focus: Security-aware backend development in C and Rust; hands-on coding plus team leadership (3–5 people)
Description
You will work on designing and developing new backend functionality while taking technical ownership of architecture decisions. Most of your time is spent coding (your tasks, architecture work, code review) and the rest is leading a small team, mentoring and supporting developers and QA. The stack is evolving toward Rust, while the existing codebase in C is still actively maintained and developed.
Responsibilities
Design and develop architecture for new features (RFC, technical decisions)
Lead and support a team of 3–5 (developers + QA): share knowledge, mentor, and drive competency growth
Analyze and estimate new projects, break them down into tasks, and manage delivery timelines
Ensure code quality and application security via solid design, code reviews, and pair programming
Solve technical challenges across development, test, and production environments
Maintain and evolve existing solutions while keeping them consistent and secure
Requirements
Proficiency in C and/or Rust
Knowledge of databases and SQL
Basic knowledge of cryptography and security
Basic knowledge of Linux/Unix; ability to work in the terminal and write scripts
Experience as a team lead or in team-related roles (e.g., Tech Lead)
Ability to manage your own tasks and provide support and/or oversight for less experienced collaborators
Strong planning skills for your work and others, including setting priorities
Benefits
Real influence on the architecture and direction of the product
Your own team and real impact on what and how it’s delivered (co-creating processes, not inheriting a fixed one)
Collaboration with experienced professionals and the opportunity to learn while delivering ambitious goals
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