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The #1 Fiat Onramp for DeFi apps, wallets and exchanges

Back-end Developer

Who are we?

Onramper is a growing startup with big ambitions. We’re bridging the world of $/€ with the world of cryptocurrencies.

We do this by building a widget and API that can be integrated by other apps and websites to allow their users to buy cryptocurrencies. Within this widget and API, we aggregate the services offered by fiat-to-crypto payment gateways. We then offer a single plug-and-play fiat onramp for parties that want to build with crypto.

As such, we have become the first-ever fiat gateway service provider, streamlining global payments on the intersection between fiat and crypto. We’re in an exciting phase of growth, but are only just getting started. We are looking for a backend engineer to join our team to build the next generation of crypto-IT infrastructure.


We’re currently a distributed team, but will soon be moving into offices in the heart of Amsterdam.

You will:

  • develop and oversee new API integrations of fiat-to-crypto payment gateways within Onramper;
  • optimize transaction-routing through new API integrations;
  • implement and optimize back-end data collection and analysis;
  • consult clients on technical options, and help ensure the technical integrity of client/merchant integrations;
  • work both independently from and together with our technical team; and
  • as an early addition to a growing team, you’ll bear substantial responsibility from day 1, and you will be fulfilling an evolving role with room to grow into a more product-vision / leadership-focused role.

Candidate requirements:

  • You have at least 2+ years experience integrating with web APIs, and 1+ years experience with Typescript, and at least a basic familiarity with serverless architectures.
  • You have a Proven ability to quickly learn new technologies and understand complex systems (APIs, databases, SDK’s, etc.)
  • You are fluent in English, have a proactive attitude and have good prioritization and organizational skills.
  • You are able to work autonomously, set goals and attain them. You’re also able to work in a team-setting, are empathetic, a good communicator, and a pleasure to work with :)


  • Experience with one or more of the following: React, UX/UI design, blockchain technologies/languages (e.g. solidity), QA testing practices/tools/frameworks, growth experiments or A/B testing
  • Experience developing for a growing startup / scale-up, a PSP, fintech, fiat gateway or any other company in which financial high reliability/security systems are built.
  • Affinity for lean/agile/scrum

What excites us:

Across the hires we aim to make, we look for signals that a candidate fits into the vision of the company that we aim to build:

Firstly, we are building a startup because we want to enjoy our working life. This means we aim to build a healthy work environment based on personal fulfillment, trust, empathy, and honest communication.

Second, we are ambitious and vision-driven. We aim to help people build and access the world of crypto, by bridging the financial world of today and the world of tomorrow. We fundamentally believe in decentralization and the potential of cryptocurrencies, and have a burning itch to accelerate this movement.

Finally, disrupting the frontiers of finance and payments excites us. Turning disruptive ideas into rapid growth gives us that special feeling in our stomachs; a feeling of excitement, joy and fulfillment.

Also, we believe in open-source, so check out our Github for some cool things we’ve open sourced.

Equity compensation part of the package

Onramper website

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