Junior Developer Jobs in Web3

Cryptio

Cryptio is an enterprise-grade crypto back-office platform. Our software helps financial institutions, corporates and crypto-native companies navigate the fragmented digital-asset landscape with confidence. We have raised $26m to date and are backed by tier-1 crypto and non crypto investors: Point Nine, 1kx, BlueYard, Tim Draper, Alven and Ledger Cathay. Some of our clients include top institutions like Circle, Uniswap or the Government of El Salvador.

We're tackling one of the biggest challenges in crypto right now - building the infrastructure to help institutional adoption. And we're playing to win.

Location

Although you can work from home 100% of the time, for this role we'd like to find someone who is based in the UK has easy access to our hubs in London and Paris.

The role

Cryptio is looking for a junior software engineer interested in working on crypto / finance / accounting related products.

You will initially join our Integrations Squad, where you'll build essential connectors to third-party services like exchanges (Coinbase, Binance…), custodians (BitGo, Fireblocks…) and order execution management systems (Talos, Wyden…). In this role, you’ll develop TypeScript-based connectors which transform third party data and enable seamless data flow between these platforms and our core systems.

As part of our cross-team collaboration initiative, you'll eventually have the opportunity to contribute to our Data Squad, leveraging your programming expertise to Python-based indexers. This dual-role position allows you to gain a comprehensive understanding of the two main ways data is imported into our product. You'll discover more about the crypto ecosystem by working on different componwents, with complementary skills that help you gain ownership and autonomy in your work. This is an excellent opportunity to develop subject-matter expertise while working with cutting-edge financial technologies.

Technologies used:

• TypeScript (key dependencies: Axios, Zod, Nest.js)

• Python (when contributing to the Data Squad)

• Redis

• S3

• Kubernetes on AWS, Docker, GitLab… (modern development stack)

What's special about this role?

You'll be at the forefront of creating reliable connections between our platform and an expanding network of cryptocurrency services. This role provides unique exposure to the complexities of integrating with dynamic data sources across the cryptocurrency ecosystem.

As you develop expertise in building connectors, you'll have future opportunities to work on more advanced projects like building indexers - specialized components that gather and process blockchain data.

The crypto ecosystem is fast-paced, with constant changes in APIs and platform-specific data structures. As part of our integration team, you'll learn how to implement robust solutions that handle real-time data syncing and overcome challenges like data inconsistencies.

What you'll be doing

• Write clean, maintainable TypeScript code

• Write clean, maintainable Python

• Implement new integrations with cryptocurrency exchanges and platforms

• Document and test your code thoroughly

• Work closely with senior engineers and product teams to understand integration requirements

• Map various data structures to our unified data model

• Help monitor integration health and identify issues

• Learn about signature mechanisms, authentication methods, and best practices for API integrations

We're looking for someone who has

• 2+ years of experience writing software

• Familiarity with TypeScript and Python

• Basic understanding of REST APIs and HTTP concepts

• Interest in learning about OAuth, JWT, and other authentication methods

• Excellent spoken and written English

• Strong desire to learn and grow technically

• Collaborative mindset - you'll be working closely with experienced team members

• Interest in the crypto and fintech industry

Interview Process

1. Talent Screen - 30 min

2. Technical Interview - 90 min

3. Team Interview - 45 min

4. Leadership Interview - 45 min

Benefits

✨ Fully-Remote / Hybrid – The choice is yours! 🌍🏡

🎉 25 Days Paid Holiday + Bank Holidays

🎂 Your Birthday Off

⭐️ Earn an extra day of annual leave for every year you're at Cryptio 🎁

🧠 Access to Mental Health, Wellbeing, and Coaching 🌿🎯

👶 Attractive Maternity and Paternity Policies for your growing family 👨‍👩‍👧‍👦

💪 Gym Classes or Spa Treatments with ClassPass (or gym reimbursements)! 🧘‍♂️🧖‍♀️

💻 Apple MacBook Pro – The best tech at your fingertips! 💻✨

💵 $200 Workplace Budget to create your perfect home office! 🏠💼

📚 Training and Development Budget – Invest in yourself and grow! 🚀

*UK have these additional benefits: 4% Pension Contributions towards your future + Private Medical & Dental Insurance with Allianz.