Senior Back-End Software Engineer - Infrastructure (Remote)

About the Role

We are seeking a Senior Back-End Software Engineer to join our team in a fully remote capacity. This role focuses on modernizing and scaling the core infrastructure of a high-growth platform. As a Senior Back-End Software Engineer, you will take ownership of the Rails stack, ensuring it is robust, performant, and secure while building internal tools to improve developer efficiency. This position offers the opportunity to influence key systems and shape the foundation for the next stage of growth.

What You'll Do

• Maintain, upgrade, and optimize the Rails back-end stack, including dependency management and security improvements.
• Build internal tools, SDKs, and libraries to enhance developer experience and platform scalability.
• Partner with front-end engineers and SREs to support observability, performance, and reliability initiatives.
• Identify and implement in-house solutions to reduce reliance on third-party services and infrastructure costs.
• Contribute to architectural decisions that improve performance, security, and cost-efficiency of the platform.
• Participate in code reviews, knowledge sharing, and mentoring to maintain high engineering standards.

Requirements

• 5+ years of back-end engineering experience, ideally focused on infrastructure or platform systems.
• Deep expertise in Ruby on Rails with a focus on infrastructure and architectural improvements.
• Strong experience with relational databases such as MySQL and Postgres.
• Proven track record of improving system performance, scalability, and reliability.
• Comfortable working autonomously in a fast-paced, fully remote environment.
• Strong alignment with company values and a collaborative mindset.
• CEFR C2 / ILR 5 English proficiency.

Nice to Have

• Experience scaling early-stage products to 1M+ monthly active users.
• Familiarity with front-end technologies, especially React.
• Experience building internal tools or SDKs for engineering teams.
• Demonstrated ability to reduce infrastructure costs through in-house solutions.

What We Offer

• Competitive USD-based compensation ($130,000–$140,000) with equity and annual reviews.
• Fully remote: work from anywhere in the world.
• 35 days of paid time off annually and paid sabbatical after 5 years.
• Comprehensive medical coverage or reimbursement options.
• Parental leave and family support benefits.
• Home office and professional development stipends.
• Biannual company retreats at exciting international locations.
• Autonomy and trust to deliver outcomes independently.