Senior Back-End Software Engineer, Infra

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Back-End Software Engineer, Infra in Poland.

This role is an exciting opportunity to shape and scale the infrastructure behind a rapidly growing, global platform. You will play a critical role in modernizing backend systems, improving performance, and ensuring long-term scalability. Working in a fully remote and highly collaborative environment, you’ll partner with cross-functional teams to enhance reliability and developer experience. The position combines deep technical ownership with strategic impact, allowing you to influence architecture and reduce dependency on third-party services. If you thrive in fast-paced environments and enjoy solving complex infrastructure challenges, this role offers both autonomy and meaningful impact.

• Own and continuously improve the Rails-based backend infrastructure, ensuring it remains modern, secure, and high-performing.
• Build and maintain internal tools, SDKs, and libraries to enhance developer productivity and system scalability.
• Collaborate closely with front-end engineers and SRE teams to strengthen observability, reliability, and performance.
• Identify and implement opportunities to replace third-party services with efficient in-house solutions.
• Contribute to architectural decisions that optimize system performance, scalability, security, and cost efficiency.

Requirements:

• 5+ years of experience in backend engineering, with a strong focus on infrastructure or platform systems.
• Deep expertise in Ruby on Rails, including performance tuning, system design, and dependency management.
• Solid experience working with relational databases such as MySQL and/or PostgreSQL.
• Proven track record of improving system scalability, reliability, and overall performance.
• Strong communication skills and ability to work effectively in a remote, asynchronous environment.
• Fluent English proficiency (written and spoken).
• Bonus: Experience scaling high-growth platforms, working with React, or building internal tools and SDKs.

Benefits:

• Competitive salary with equity and annual compensation reviews
• Fully remote work environment with flexibility to work from anywhere
• Generous paid time off (35 days annually) and sabbatical opportunities
• Comprehensive healthcare coverage or reimbursement options
• Parental leave to support growing families
• Home office setup stipend
• Learning and development budget to support continuous growth
• Performance-based bonus opportunities
• Company-sponsored global retreats and team offsites