Software Engineer Intern

TwoWay builds next-gen software with traders, for traders .

We optimize trading workflows in financial institutions, transforming high-volume chat messages into structured market data in real time. We collaborate closely with top-tier EU and US investment banks and other financial institutions to solve real, complex problems that matter.

• Client & market impact – Help desks deliver sharper prices, serve more clients, and scale with leaner teams
• Performance – real-time, zero-latency data processing that enhances decision-making and pricing accuracy.
• Design – user-centric from day one, tailored for the complex realities of trading desks.

You will report directly to our CTO, which is an amazing opportunity to learn fast and grow.

About the Role

As a Software Engineer Intern at TwoWay, you’ll be part of a fast-moving team building critical tools for investment bank traders. This is not a typical internship — you’ll work on real features, contribute to core product decisions, and ship code that goes into production.

You’ll collaborate closely with senior engineers, product designers, and the founders.

Responsibilities

• Build and improve core features of our web application, from backend logic to frontend UI
• Write tests and participate in code reviews to maintain high code quality
• Learn best practices in software development, DevOps, and product iteration in a startup setting

Requirements

We are looking for a 6 to 12-month internship , starting as soon as possible.

We’re also open to candidates interested in a longer-term alternance (1 to 3 years), combining work and studies.

• Build Fullstack Products : You’re comfortable working across the stack — with experience or strong interest in modern frameworks like SvelteKit on the frontend and NestJS or Node.js on the backend.
• Care About UX and Details : You pay attention to UI/UX consistency, performance, and believe the best software feels as good as it works.
• Stay Curious and Data-Informed : You ask questions, seek feedback, and back decisions with evidence.

About TwoWay

At TwoWay , we’re building category-defining software for global investment banks — and doing it with a team that values speed, ownership, and real impact. TwoWay is a hybrid company with teammates across France and Europe. Our HQ is at Station F in Paris — the world’s largest startup campus and home to a thriving tech ecosystem.

Benefits

• ✨ Flexible setup: full remote, full office, or anything in between
• Competitive compensation with real upside

Offer – If it’s a match, we move fast to get you on board