Senior Software Engineer / Reconciliation API / Rust / Remote UK or France

Summary

Cryptio is looking for a senior software engineer interested in working on crypto, finance, accounting, and reconciliation-related products.

You will join a team of talented engineers working on Cryptio’s Data & Reconciliation API. This API-only product is central to our mission of enabling large-scale users to reconcile our proprietary on-chain datasets with their internal data seamlessly. You’ll play a key role in designing, building, and maintaining a high-performance, scalable system that ensures accuracy, speed, and reliability for enterprise-level use cases.

Key technologies:

• Rust

• PostgreSQL

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

What’s special about this role?

This role is a rare opportunity to work at the intersection of blockchain technology, high-performance systems engineering, and enterprise-grade financial solutions. You’ll contribute to a product that plays a mission-critical role for our clients, helping them reconcile vast amounts of blockchain data with their internal records. This isn’t just about building an API; it’s about creating a robust, scalable solution that bridges the gap between cutting-edge decentralized technologies and the structured needs of enterprise financial operations.

The work you do will have a direct impact on how some of the world’s most innovative companies manage their blockchain data and offer cutting-edge financial services to their users. Beyond the technical challenges, you’ll also be part of a dynamic, forward-thinking team that values collaboration, continuous learning, and pushing the boundaries of what’s possible in fintech. At Cryptio, you won’t just develop software; you’ll help define the future of reconciliation and data management in the crypto space.

Responsibilities

• Contribute to the design, development, and maintenance of the Data & Reconciliation API

• Write and ship production-grade Rust code

• Document and test your code

• Work closely with product teams to ensure new features meet user needs

• Work with large-scale data pipelines, optimizing reconciliation workflows for speed and accuracy

• Monitor and troubleshoot user issues, proactively implementing improvements

Requirements

• 5+ years of experience in software engineering

• Proficient in Rust, ability to write and ship production-grade code

• Proficient with PostgreSQL, ability to design database schemas and write complex queries

• Some experience working with data-heavy products

• Some experience optimizing systems: caching, indexing, query optimization, profiling

• Impeccable spoken and written English

• Exceptional communication skills, with both technical and non-technical stakeholders

• Thriving when working with others; collaboration is paramount for this role

• An analytical mindset, a passion for solving complex problems, and an interest in the crypto and fintech industry

Location

You can work from home 100% of the time, but you should be able to easily join one of our hubs from time to time. Our hubs are Paris, London, and New York.

Interview Process

1. Talent Screen – 45 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.

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

*France has these additional benefits: English language course options.

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