Quidax is hiring a mid-level Ruby on Rails engineer to own the money-movement layer of its product. If you have three to five years of backend Rails experience in production and have worked on anything transactional, read this.
About Quidax
Quidax is a Nigerian-founded cryptocurrency exchange. According to the company, it was founded in 2018 and has grown to serve over one million users across 70+ countries. In 2024, it reportedly became the first crypto exchange to receive a provisional operating license from Nigeria’s Securities and Exchange Commission as a digital assets exchange.
The company is now building institutional infrastructure: custody services, stablecoin rails, and fiat on-ramps for partners who want access to the Nigerian market. The product you would work on, RAMP, is the layer that makes all of it move.
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What the Ruby on Rails Role Involves
You would join a focused team working on RAMP, Quidax’s on-ramp/off-ramp product - the flows users take to move money in and out of crypto: deposits, withdrawals, partner integrations, and reconciliation.
Day to day, you would:
- Investigate and fix stuck transactions, failed callbacks, and unclear system states.
- Own specific features or flows end-to-end from writing to shipping to monitoring.
- Improve test coverage across critical deposit and withdrawal paths.
- Add logging, alerts, and debugging hooks where observability is weak.
- Participate in code reviews and knowledge-sharing with the team.
- Work through complex, transaction-heavy systems that are not always well documented.
The first 30 days are structured: get familiar with the codebase, understand the core product flows, and ship one meaningful fix. By month three, you own something. By month six, you are independently resolving reliability issues across the full product.
The role is honest about what is hard. You will work on backend systems where failures directly impact customers. You will balance new feature development against keeping existing systems stable. You will need to get across fintech and crypto infrastructure concepts, idempotency, retries, state machines, and reconciliation quickly if you haven’t worked with them before.
What They Want
Must-have:
- 3 to 5 years of Rails backend experience in production environments
- Comfortable with APIs, background jobs, database design, testing, and debugging
- With a patient, methodical approach to debugging, you read logs, trace flows, and confirm root causes before touching code.
- You ship incremental improvements rather than wholesale rewrites.
- You write clean code and care about how your work affects real users.
- BA, BSc, or HND minimum qualification
Nice to have:
- Experience in fintech, payments, crypto, or on-ramp/off-ramp products
- Familiarity with idempotency, retries, reconciliation, and state machines
- Prior experience working in a remote startup environment
- Exposure to crypto exchanges, payment providers, or bank integrations
Salary and Benefits
No salary or compensation range is disclosed in the listing. before applying.
For context, mid-level backend engineers at Nigerian fintech startups typically earn between ₦800,000 and ₦2,000,000 per month. The range depends on the company’s stage, funding, and whether the role is remote-first. At an established company with Quidax’s regulatory standing, compensation usually trends toward the upper end for remote roles. These are market estimates only, not figures from Quidax. Ask directly in the interview.
Is This Open to Nigerians?
Yes. The listing explicitly states Nigeria as the location. The role is remote, so you work from anywhere in the country.
Payroll in Naira is the most likely arrangement, given that Quidax is a Nigerian company. If you want USD or stablecoin compensation, raise that in the interview process.
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How to Apply
- Go directly to the application:
- Create a Factorial HR account or log in if you have one.
- Complete the application form and upload your CV, along with any portfolio or GitHub links.
- No cover letter is mentioned in the listing. A short note on your experience with transactional or payment systems will differentiate you anyway.
- No deadline is listed. The role appears to be rolling. Apply promptly. Roles at companies this size close without notice.
Prepare these before you apply:
- Updated CV leading with production Rails experience and any payment or fintech work
- GitHub profile or code samples showing how you handle background jobs, testing, or API integrations
- LinkedIn profile, if it accurately reflects your experience
GizPulse Verdict
Quidax has regulatory standing, real transaction volume, and a product problem that is genuinely hard. RAMP handles the flows that fail most visibly when they break deposits, withdrawals, and partner callbacks. That means the role has weight.
The engineer who fits this is not a generalist looking to figure out fintech on the job. You need prior production experience with transactional systems, payments, order management, subscription billing, anything where state matters, and failures cost real money. Crypto experience is not required. Precision and patience are key.
The salary omission is a red flag, not a dealbreaker. Companies at this stage sometimes withhold compensation to anchor negotiations. Go in with a number ready and ask early. Do not wait until the final round.
One tip to stand out: The listing emphasises methodical debugging over raw output. In any interview task or take-home, show your process for how you read logs, isolate variables, and confirm root causes, not just the fix. That is what they are actually evaluating.
This role is not for engineers who need structure handed to them or who default to rewrites when a codebase gets messy. If you can work incrementally, reason carefully under uncertainty, and take ownership of systems that matter, it is worth your time.
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