Full-stack Engineer - Console & Billing; Spain

Full-stack Engineer - Console & Billing (Spain)

If you are interested, please apply here

Stable coins and blockchains are upgrading the world’s financial system — and Crossmint lets companies harness their power with ease.

Crossmint is a one‑stop‑shop developer platform for building modern financial applications, from the next generation of fintechs to applications that leverage AI agent‑driven commerce.

With just a few lines of code, developers can integrate programmable wallets, stablecoin payments, tokenization, on/off ramps, compliance, and agentic commerce tools — all from a single vendor, without the need for a large team of blockchain engineers.

From companies like Money Gram and Visa to entire nation states, our more than 40,000 clients use Crossmint to launch new financial products, tokenize assets, and build applications for agentic commerce — all on fully managed infrastructure across 50+ chains.

If you want to help build the backbone of programmable finance and agentic systems, we’d love to work with you!

We have offices in Madrid (Gran Vía), and we are also open to a full remote setting from Spain.

Full‑time, indefinite contract.

4‑7 years of experience. We are also open to considering candidates with more than 7 years of experience.

As a Full‑stack Engineer for the Developer Console team at Crossmint, you will play a crucial role in building and maintaining the financial infrastructure that powers our ecosystem. You will ensure the seamless management of subscriptions, payments, and usage reporting, enabling our users to engage with our services effortlessly. Your responsibilities will include:

• Write high‑quality code: correct, secure, performant, maintainable.
• Develop and optimise billing workflows: design, implement, and improve the billing system that manages subscription plans, processes payments, and integrates with Stripe for project fund management.
• Architect and maintain financial data systems: ensure user transactions, balances, and payment methods are accurately stored and managed.
• Enhance the Usage section: build tools to track and report usage metrics, providing transparency to users on their consumption.
• Write architectural and design docs individually and with the team.
• Run your projects end to end: from conceptualisation to shipping and beyond.
• Perform on‑call duties: participate in paid on‑call shifts (once or twice a quarter).
• Mentor new team members.

To thrive in this role, you should possess the following qualifications:

• Excellent Communication
  
  Skills:
  
  demonstrate excellent written and spoken English.
• Educational Background: hold a Bachelor’s degree in Computer Science or a related field, or equivalent knowledge and skills with industry experience.
• Professional
  
  Experience:
  
  accumulate 4+ years of professional experience in developing production systems, with a focus on financial systems, subscription models, or payment integrations.
• Programming Expertise: showcase advanced knowledge in at least one modern programming language such as Typescript, Java script, Java, Python, Scala, Ruby, etc., with an emphasis on secure and scalable financial processing.
• Experience with Stripe or similar payment processors: a strong plus if you have worked with billing integrations and payment flows.
• Diverse applicants are strongly encouraged to apply.

Please keep in mind: this is the full list of everything we’re looking for. You don’t need to check every single box to be a strong candidate, and having a good number of these would already indicate a solid fit for the role.

You will own critical systems at the heart of our financial infrastructure, powering subscriptions, payments, and usage for apps used by millions. As a Full‑stack Engineer, you’ll ship end‑to‑end, shape architecture, and solve meaningful challenges alongside a sharp, mission‑driven team. If you want autonomy, impact, and to build the future of onchain development, this is your place!

• Highly competitive compensation.
• Unlimited, flexible PTO.
• Company laptop and allowance for any necessary home equipment.
• Daily stipend for commuting to the office…