Tech Lead, Koinly

• Experience: 7+ years, prior leadership of senior peers
• 7+ years’ experience and deep proficiency in Ruby on Rails
• Proven results improving performance and reliability in production databases (Postgres preferred)
• Strong async communication and mentoring skills
• Track record of solving performance issues through thoughtful design and clean code
• Ability to analyze and simplify complex systems
• Experience with data pipelines, ETL, or reconciliation systems

Desirable

• At Koinly, we’re looking for a Tech Lead (Ruby on Rails) to push our financial data platform to the next level
• This role is roughly 80% coding, 20% technical leadership and is ideal for a senior engineer who thrives on solving performance bottlenecks, guiding peers, and shaping architecture without the management overload
• Report to: Engineering Manager
• Mission: Lead a small senior team while staying hands-on to solve performance bottlenecks and push technical excellence
• Koinly’s backend reconciles billions of crypto transactions across 900+ integrations. Every millisecond and data point must be accurate. As usage surges, the challenge is keeping our systems fast, reliable, and easy to evolve
• You’ll lead the effort to:
• Keep performance high as scale increases
• Refactor and simplify complex Ruby systems
• Mentor senior peers and shape the next generation of our backend architecture
• Clean code and clarity at massive scale, that’s the mission
• Profile, tune, and reduce latency across high-volume ingestion and reconciliation systems
• Optimize Postgres queries, caching, and background processing
• Own and evolve our Ruby + Postgres backend
• Lead major refactors to improve maintainability and scalability
• Design data flows and pipelines that reconcile billions of records accurately
• Set coding standards, review designs and pull requests, and coach senior engineers through code review
• Leadership through mentoring, reviews, and technical decision-making (without management overhead)
• Collaborate asynchronously with product, design, and leadership
• We're light on meetings, heavy on ownership
• Collaborate through lightweight RFCs and clear written communication
• What success looks like? You’ll make our systems faster, our codebase simpler, and our engineering culture stronger

• Start date: ASAP