About Cryptio
We’re Cryptio. We build infrastructure to bring financial integrity to the crypto economy. Our enterprise-grade back-office and data platform power mission-critical accounting, reporting, and operational workflows for institutions, corporates, and crypto-native organisations.
We’re trusted by leaders like Circle, Societe Generale, Uniswap, Gemini, and the Government of El Salvador. We’ve raised $26m from top investors including Point Nine, 1kx, Tim Draper, and Ledger Cathay.
The role
We’re hiring Senior Backend Engineers to join our Integrations squad. You’ll be at the core of building and maintaining integrations between Cryptio’s SaaS platform and the crypto ecosystem’s richest set of third-party APIs, supported by a modern engineering stack (TypeScript, Nest.js, Temporal, Kubernetes, AWS, Docker).
This isn’t back-office plumbing—your work will be mission-critical for customers who rely on us for accurate back-office operations and compliance. You’ll be challenged by rapidly changing APIs, dynamic data structures, and the need to deliver seamless, scalable connections to new exchanges, custodians, and trading systems.
Key technologies
TypeScript (key dependencies: Axios, Zod, Nest.js, Temporal)
Redis
S3
Kubernetes on AWS, Docker, GitLab… (modern development stack)
What you’ll do
Write production-grade TypeScript, bringing new integrations online and maintaining existing ones
Own the end-to-end process: scope, document, and test your code for reliability
Collaborate with Product and other engineers to make sure integrations meet customer needs
Map messy, evolving data models into unified schemas
Monitor health, resolve data inconsistencies, and proactively fix or improve integrations
Contribute to architecture decisions to enhance scalability and reliability
We’re looking for someone who
Has 5+ years of software development experience and confident working with TypeScript
Has hands-on experience integrating third-party APIs (REST, GraphQL) and wrangling with OAuth/JWT/auth flows
Brings clear communication—comfortable switching between technical and non-technical audiences
Thrives in fast-paced, collaborative teams
Has an analytical mindset, enjoys problem-solving, and is excited by crypto and fintech
Communicates fluently in English, written and spoken
Why you’ll love this role
You’ll be at the heart of the crypto/finance data revolution, shaping how large institutions navigate a rapidly evolving industry
Work with cutting-edge tech in a high-trust, remote-first environment where quality and ownership matter
Work 100% remotely, with occasional travel to our hubs in Paris or London
Lots of internal mobility opportunities
25 days annual leave, your birth off, private medical, pension, home office budget and more!
Interview Process
Here’s what you can expect as we get to know each other:
Talent Screen (15-30 min): We'll kick things off with a friendly video call where we can talk about your application, go over the role’s responsibilities, and answer any questions you might have about Cryptio.
Technical Interview (1 hour): Next, you'll join one of our tech leads for a live coding session and a Q&A; it's a great chance to show your skills and learn more about our technical challenges.
Team Interview (30 min): You’ll then meet with an engineer from your potential team and a product manager. This is an informal chat to help us get to know you better and to find out more about how you like to work with others.
Final Interview (30 min): To wrap things up, you’ll have a conversation with our CTO. This is a high-level discussion focused on making sure the role feels like the right fit for you.
If this sounds like you, we would love to hear from you 🙌
At Cryptio, we move fast and take ownership of outcomes. We learn from failures, celebrate wins, and let humility, curiosity, and a passion for crypto guide how we work. If you value collaboration and want to build with purpose, you’ll feel right at home here.
