Software Engineer (Ruby, Ruby on Rails)

Quidax is an African focused cryptocurrency exchange. We enable customers to buy/sell Bitcoin and other cryptocurrencies (Ethereum, USDT and Litecoin) with Naira.

Our vision, which is at the core of what we do every day at Quidax, is to build a world where sending money and value around the globe is as easy as sending a text message. We value positive energy, and clear communication and are committed to building an inclusive environment for people from every background.
We are recruiting to fill the position below:

Job Title: Software Engineer (Ruby, Ruby on Rails)

Location: Remote
About the Role

• We’re hiring a Mid-Level Java, Spring Boot Engineer to work on the core backend systems that power how customers trade, move money, and interact with the Quidax platform.
• You’ll join a team working on the flows that matter most: APIs, integrations, transaction processing, and the reliability of systems that real customers depend on every day
• . It’s a great role for an engineer who’s ready to go deeper, take real ownership, and grow fast in a fintech environment.
  What You’ll Be Owning
  Learn & Contribute:
• First 30 days: Get across the RAMP codebase, understand the core flows, and ship your first meaningful fix.
• By month 3: Own specific features or flows end to end, with support from the team where needed.
• By month 6: Independently investigate and resolve reliability issues across deposits, withdrawals, and partner callbacks.
  Reliability & Code Quality:
• Reduce recurring issues: stuck transactions, failed callbacks, unclear states, and manual escalations.
• Improve test coverage across critical flows and leave every area you touch cleaner than you found it.
• Add observability where it’s weak: better logging, alerts, and debugging hooks.
  Team & Growth:
• Participate in code reviews, share what you learn, and support engineers around you.
• Grow your understanding of transaction-heavy systems: idempotency, retries, state machines, and reconciliation.
  Biggest Challenges You’ll Tackle:
• Working on backend systems where failures have real customer impact.
• Debugging complex, transaction-heavy flows that aren’t always well documented.
• Balancing new feature work with improving the stability of existing systems.
• Learning fintech and crypto infrastructure concepts on the job and applying them quickly.
  What We’re Looking For
  Must-haves:
• 3 to 5 years of Rails backend experience in production environments.
• You write clean code, debug with patience, and care about how your work affects real users.
• Comfortable with APIs, background jobs, database design, testing, and debugging.
• Methodical debugger: you trace flows, read logs, and find the real root cause.

You improve code incrementally without defaulting to a full rewrite.
Bonus: Experience in fintech, payments, crypto, or on-ramp/off-ramp products.
Nice to haves:

• Familiarity with transaction concepts: idempotency, retries, reconciliation, state machines.
• Experience working in a remote startup environment.
• Any exposure to crypto exchanges, payment providers, or bank integrations.
  Reporting Line:
• You’ll report to the RAMP Engineering Manager and work closely with the RAMP Product Manager on priorities, user problems, and what gets built next.
• Day to day, you’ll collaborate with design, compliance, operations, support, and finance, as well as external partners.
  Application Closing Date
  Not Specified.
  How to Apply
  Interested and qualified candidates should:
  Click here to apply online