FreelanXDevelopment & ITPosted 2h ago
Back-end developer · Payments API in Node.js
A fintech scale-up$6,000 – $9,0008 weeksRemote
94
Strong fit
3 reasons, see right
We are building a payments API for our product launch. You will design the endpoints, write the tests and document the API for our mobile team. The work is split into four milestones, each paid when approved.
Budget
$6,000 – $9,000$6k$9k
Duration
8 weeksLocation
RemoteStart
From NovemberHours
Full-timeLanguage
EnglishMilestone plan
$9,000 in 4 payments$1,500
Kick-off
$3,500
Core payments API
$2,500
Integration
$1,500
Go-live support
Week 1Week 4Week 7Week 8
Skills
Node.jsPostgreSQLRESTAPI designTesting
Four milestones, each with its own deliverable and amount. Each is paid when the company approves it, or automatically 5 working days after you submit it.
1
Kick-off
$1,500API design and data model agreed · Week 1
2
Core payments API
$3,500Endpoints, tests and documentation · Week 4
3
Integration
$2,500Connected to the client's app, staging · Week 7
4
Go-live support
$1,500Production release and hand-over · Week 8
Total$9,000
N
A fintech scale-up
Verified company · Fintech · London
Missions posted
7Freelancers hired
5Member since
2025Identity of the company checked
Payment method on file
Contracts signed online on FreelanX
A strong applicationWhat companies read first
A plan for milestone 1Two or three lines: what you deliver first, and when.
Two relevant samplesPick work close to this brief, not your whole portfolio.
Your real start dateIt is checked against your availability.
One question, if you have oneCompanies reply faster to precise questions.
94
94% fit
Why FreelanX AI suggests it
Node.js and PostgreSQL are in your top skills
You are available from November
The budget is within your rate
What you keep
Mission total$9,000
FreelanX fee (5%)−$450
You receive$8,550
Paid at each milestone, with an invoice every time.
How you get paid
SubmittedYou deliver
ApprovedOr automatic after 5 working days
PaidWith an invoice
Activity
Proposals
6Interviews
2The company replies within a day on average.
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FAQ · Applying
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