Senior Ruby Backend Architect — Remote & Async

Koinly Pte. Ltd; Remote; GBP 60,000 - 69,000; Full time

Job summary

A leading financial tech startup in the UK is looking for a Senior Ruby Developer to design and maintain scalable backend systems for crypto tax reporting. This fully remote role prioritizes technical excellence and offers a flexible working schedule. Ideal candidates will have 6+ years of Ruby experience and strong problem-solving skills. Enjoy autonomy in a growing startup that values performance and reliability.

Benefits

32 days of PTO

Async culture

Remote-first

Flexible working schedule

High level of autonomy

Qualifications

• 6+ years of professional Ruby experience.
• Strong SQL skills, including performance tuning and complex queries.
• Experience designing and scaling backend systems (microservices, APIs, background jobs).

Responsibilities

• Design, build, refactor, and optimize backend services end-to-end.
• Work with huge datasets (billions of transactions).
• Champion performance, clarity, and simplicity in code and system design.

Skills

Ruby

SQL

Problem-solving

Debugging

Job description

A leading financial tech startup in the UK is looking for a Senior Ruby Developer to design and maintain scalable backend systems for crypto tax reporting. This fully remote role prioritizes technical excellence and offers a flexible working schedule. Ideal candidates will have 6+ years of Ruby experience and strong problem-solving skills. Enjoy autonomy in a growing startup that values performance and reliability.