Senior Backend Engineer (Typescript)

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.

Perks

👩‍💻 Remote or Hybrid working

🏝️ 25 days paid holiday plus bank holidays

🙌 One additional day of annual leave each year, up to 30 total days

🎂 Your birth off

🧘 Mental health resources, wellbeing programs, and professional coaching

🫶 Family-friendly policies

💪 Fitness and wellness budget

💻 MacBook Pro

🖥️ $200 home office setup budget

🎓Training and development budget

*** we have additional benefits depending on location

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.