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.