Full Stack Engineer Intern

Algoan is a fintech, founded in 2018, revolutionising the credit sector by building fairer and more transparent credit decisioning tools.

Europe's leader in Credit Scoring API, it provides financial institutions, retailers and fintech with credit decisioning tools that can be used in a variety of use cases such as BNPL, consumer credit, car subscription, mortgage and much more. We work with major players (Sofinco, Cofidis, Revolut, etc.) to improve user experience and acceptance rates while reducing the risk of over-indebtedness.

Based on Open Banking (the secure sharing of bank account data), Algoan solutions enable a cut of credit risk by up to 50% and an increase in loan production by up to 40% while lowering processing costs, and offering a seamless 100% digital pathway to credit applicants.

Today, Algoan is scaling faster than ever, driven by international expansion across Europe and the upcoming DCC2 regulation, which is accelerating demand and API call volumes at an unprecedented pace.Our Product team drives this transformation, working in squads. The Open Banking squad is responsible for our banking aggregation product, which allows loan applicants to securely share their banking history. It is from this data that we are able to calculate a credit score. The Credit Decisioning squad is responsible for our credit decisioning solution, which is based on the retrieved banking history.

Main Mission

To support our growth, we are looking for a Full Stack Engineer Intern to join Algoan for a final-year internship.

You will contribute to building and improving our APIs and front-end tools, and help deliver scalable, high-quality products used by major financial institutions across Europe.

You will be onboarded into one of our product squads depending on team needs and your interests. You will work closely with software engineers, product managers, DevOps engineers, and data teams to deliver reliable and developer-friendly solutions.

Key Responsibilities

As a Fullstack Engineer Intern, you will:

• Contribute to the design, development, and maintenance of APIs using , TypeScript, and NestJS.
• Build intuitive and performant user interfaces with React,TypeScript, RTK query and NextJs.
• Ensure seamless integration between back-end and front-end systems.
• Work within our Nx monorepositories, contributing to code sharing, build performance, and consistent tooling.
• Participate in code reviews and contribute to clean, maintainable, and testable code (unit/integration tests).
• Collaborate with the DevOps team to improve CI/CD workflows and developer experience.
• Take part in the squad's product lifecycle: discovery, delivery, monitoring, and continuous improvement.
• Deliver a meaningful internship project with real production impact, supported by mentorship and structured feedback.

Must-have

• Final-year student in a top engineering school (or equivalent).
• Strong fundamentals in software engineering (data structures, APIs, clean code).
• Good knowledge (academic or project-based) of modern web development.
• Basic understanding of Git workflows and collaborative development.
• Strong motivation to learn, deliver, and work in a fast-paced product environment.
• Good communication skills and a team-oriented mindset.

Nice-to-have

• Prior internship experience in software engineering.
• Exposure to REST APIs, , React, NestJS, , MongoDB, or monorepo setups (Nx).
• Interest in fintech, API-first products, or data-driven applications.
• Familiarity with CI/CD, Docker, or cloud environments.
• Curiosity about performance, scalability, and developer experience.

Profile

• Final-year internship (end-of-studies) as part of your engineering degree (Grande École d'Ingénieurs or equivalent).
• Able to work autonomously with guidance, and proactive in asking questions when needed.
• Pragmatic, impact-driven, and eager to build production-grade software.

What We Offer

• A passionate and ambitious team.
• A culture of innovation and collaboration.
• Strong mentorship and real ownership over meaningful deliverables.
• Exciting and diverse technical challenges.
• Flexible work environment (2 days in the office in the center of Paris).
• A direct impact on a product used by major European financial institutions.
• Compensation: €1,500 gross per month + meal vouchers + 50% reimbursement of public transportation costs

Hiring Process

• Introductory Call (15 min): introduction to Algoan, the internship, and your motivations.
• Online Technical Test (1h–1h30): programming and problem-solving exercises.
• Technical Interview (1h): debrief of the test + discussion with Backend & Frontend engineers (coding practices, reasoning, engineering mindset).
• CTO Interview (30 min): discussion about technical vision, culture fit, and Algoan's mission.