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- Tasks: Maintain and improve crypto data integrations for 1.5M+ users worldwide.
- Company: Join Koinly, a remote-first startup in the booming crypto tax industry.
- Benefits: Enjoy 32 days of PTO, flexible hours, and direct access to the founder.
- Why this job: Make a real impact by troubleshooting and building integrations in a fast-paced environment.
- Qualifications: 3+ years of Ruby experience and strong problem-solving skills required.
- Other info: Be part of a lean team with massive data volume and minimal meetings.
The predicted salary is between 40000 - 46000 £ per year.
Become part ofthe backbone of the crypto data flow
At Koinly, we’re looking for a Ruby software engineer in the Integrations team,to be thebridge between app development and customer support.
Practically?
☝️ You’ll help keep 900+ crypto integrations running smoothly, so our users don’t have to lift a finger.
We’re a fully remote-first, async-first startup with product-market fit in a niche (and booming) domain: crypto taxes. If you value autonomy, technical excellence, and clear communication over meetings and process complexity, Koinly is the place for you.
Why this role exists
Koinly connects with a wide range of exchanges, wallets, and DeFi protocols, integrations that are essential to our product. With many already built and APIs constantly changing, this role ensures those connections stay reliable, supports customers when issues arise, and helps deliver a smooth, seamless experience.
It’s about keeping Koinly’s ecosystem stable, up to date, and ready for the fast-moving world of crypto and DeFi.
What you’ll do:
You’ll be part of the Integrations squad: the team responsible for keeping Koinly running smoothly across over 900+ crypto platforms. That means a lot of APIs, edge cases, and data quirks. Your work will form the invisible layer that makes crypto tax reporting feel effortless to our users. At the core: Maintain and improve the systems that sync crypto data for 1.5M+ users worldwide.
- Reproduce, troubleshoot, and resolve complex technical problems (under SLA).
- Develop new integrations and improve the quality of the existing ones.
- Monitor and resolve application errors.
- Add support for new data formats.
- Partner with Customer Support when technical expertise is needed.
- You may occasionally be part of an on-call rotation.
What you bring:
- 3+ years of professional experience with Ruby.
- Experience integrating third‑party services and RESTful APIs.
- Excellent troubleshooting and problem‑solving skills.
- You like digging through data until things make sense.
- Able to make pragmatic decisions in complex, ambiguous situations.
- Clear, concise written and verbal communication in English.
- Eagerness to work with a high‑standard engineering team, CI/CD, and testing.
- Comfort with feedback loops and a high‑ownership mindset.
Why join Koinly
- A profitable, bootstrapped startup in a hyper‑growth industry.
- Direct access to the founder, an engineer who understands your challenges.
- Pure Ruby on Rails backend, no language sprawl, no over‑engineering.
- High autonomy, async‑first, deep work, minimal meetings.
- Massive data volume: billions (and billions) of trades, 900+ integrations.
- Lean team with big impact: millions of users, only 37 people company‑wide.
- No bureaucratic bloat, no corporate theatre.
- Remote, flexible working hours, async by default.
- Crypto‑adjacent without the hype: we’re a painkiller, not a multivitamin.
Compensation and location
- Salary range: USD $50,000-$55,000 per year
- Contract Type: Full‑time (Contractor – B2B)
- Location: Remote [EMEA]
- Perks:
- 32 days of PTO
- Async culture
- Fast‑moving team
- Founder access
- The expectation that you own your work
If you’re excited to troubleshoot tough bugs, build integrations, and make an impact for 1.5M+ users while growing your skills fast, this role is for you. Apply now.
Key details in sum
- Report to: Tech Lead
- Location: Remote – preference for Europe‑based candidates
- Salary: USD $50,000-$55,000 per year
- Type: Full‑time (contractor – B2B)
- Experience level: 3+ Years with Ruby
- Start date: ASAP
- Team size: 10 engineers in a 37‑person company
- Main responsibilities: Own the full lifecycle of integrations, from troubleshooting and error resolution to building new connectors and supporting customers when issues arise.
Due to the nature of our business and external requirements, we perform background checks on all potential team members, passing which is a prerequisite to join Koinly.
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Ruby Developer (Integrations) Tech · Europe · employer: Koinly
Contact Detail:
Koinly Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Ruby Developer (Integrations) Tech · Europe ·
✨Tip Number 1
Network like a pro! Reach out to folks in the crypto and tech space on LinkedIn or Twitter. Join relevant groups and forums where you can connect with potential colleagues or even hiring managers. You never know who might have the inside scoop on job openings!
✨Tip Number 2
Show off your skills! Create a GitHub profile showcasing your Ruby projects, especially any integrations or APIs you've worked on. This gives potential employers a taste of your coding style and problem-solving abilities, making you stand out from the crowd.
✨Tip Number 3
Prepare for those interviews! Brush up on common Ruby interview questions and be ready to discuss your experience with integrations and troubleshooting. Practice explaining complex problems you've solved in a clear and concise way—communication is key!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team at Koinly, where we value autonomy and technical excellence.
We think you need these skills to ace Ruby Developer (Integrations) Tech · Europe ·
Some tips for your application 🫡
Show Your Ruby Skills: Make sure to highlight your experience with Ruby in your application. We want to see how you've used it in real-world projects, especially when it comes to integrations and APIs.
Be Clear and Concise: When writing your application, keep it straightforward. We appreciate clear communication, so avoid jargon and get straight to the point about your skills and experiences.
Tailor Your Application: Don’t just send a generic application! Tailor it to Koinly by mentioning specific aspects of our work that excite you, like maintaining those 900+ crypto integrations. Show us you’ve done your homework!
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss any important details about the role.
How to prepare for a job interview at Koinly
✨Know Your Ruby Inside Out
Make sure you brush up on your Ruby skills before the interview. Be prepared to discuss your experience with Ruby, especially in relation to integrations and APIs. Practise coding challenges that focus on problem-solving and troubleshooting, as these are key aspects of the role.
✨Understand Koinly's Ecosystem
Familiarise yourself with Koinly’s product and how it interacts with various crypto platforms. Knowing the basics of crypto taxes and the importance of seamless integrations will show your genuine interest in the company and its mission.
✨Prepare for Technical Questions
Expect to face technical questions that assess your ability to troubleshoot and resolve complex issues. Think about past experiences where you successfully solved problems or improved integrations, and be ready to share those stories.
✨Communicate Clearly and Concisely
Since clear communication is vital in a remote-first environment, practise articulating your thoughts clearly. Whether it's discussing technical concepts or explaining your previous projects, being concise will help you stand out as a strong candidate.
