Software Engineer Intern

TwoWay; Paris; Hybrid; EUR 12,000 - 19,000; Part time

Benefits offered by this job

Flexible work setup

HQ at Station F Paris

Remote-friendly

Job summary

TwoWay is building next-gen software for traders, transforming high-volume chat messages into structured market data in real time. You’ll work with a small, fast-moving team on real features that ship to production, collaborating with senior engineers, product designers, and founders at Station F in Paris.

You’ll gain hands-on experience across frontend and backend, with emphasis on modern stacks like SvelteKit and NestJS, while learning DevOps, testing, and product iteration in a startup

Responsibilities

• Build and improve core features of our web application, from backend logic to frontend UI
• Contribute to the design and architecture of new components and APIs
• Collaborate with the product team to understand user needs and translate them into clean, maintainable code
• Write tests and participate in code reviews to maintain high code quality
• Investigate and fix bugs in a fast-paced production environment
• Learn best practices in software development, DevOps, and product iteration in a startup setting

Skills

Fullstack

SvelteKit

NestJS

Node.js

UI/UX

Startup experience

Communication

Tools

Git

CI/CD

Testing

Job description

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. This helps traders stay ahead of the market, cut operational risk, and save time — all while fitting into existing workflows and screen space.

We collaborate closely with top-tier EU and US investment banks and other financial institutions to solve real, complex problems that matter.

Our promise:

Operational efficiency – Reduce manual errors and mitigate operational risk at scale

Performance under pressure – In volatile markets, boost desk efficiency and capture more revenue

Client & market impact – Help desks deliver sharper prices, serve more clients, and scale with leaner teams

We deeply care about:

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.

Impact – enabling traders to operate more efficiently in stressful environments and helping banks better serve their clients.

Vos missions

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

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. From day one, you’ll be trusted with meaningful responsibility and given the support to learn and grow quickly.

As a key member of the team, you’ll do the following missions:

• Build and improve core features of our web application, from backend logic to frontend UI
• Contribute to the design and architecture of new components and APIs
• Collaborate with the product team to understand user needs and translate them into clean, maintainable code
• Write tests and participate in code reviews to maintain high code quality
• Investigate and fix bugs in a fast‑paced production environment
• Learn best practices in software development, DevOps, and product iteration in a startup setting

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

Vos compétences

You’d be a great fit if you

• 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. You love shipping features end-to-end.
• Thrive in Fast‑Paced Environments: You’re energized by startups. You enjoy learning quickly, taking initiative, and iterating fast in a dynamic, high‑growth setting.
• Care About UX and Details: You pay attention to UI/UX consistency, performance, and believe the best software feels as good as it works.
• Think Long‑Term: You understand the importance of clean code, maintainability, and security, even when moving fast.
• Stay Curious and Data‑Informed: You ask questions, seek feedback, and back decisions with evidence. You’re not afraid to challenge assumptions and improve how things are done.
• Are a Strong Communicator: You explain technical ideas clearly, ask for help when needed, and enjoy collaborating with product and design peers.

Avantages

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. If you’re sharp, driven, and thrive in fast‑paced, high‑stakes environments, you’ll feel right at home.

We’re a small, tight‑knit team where:

Ideas move fast

Talent is trusted

Execution beats hierarchy

We believe in clarity over fluff, shipping over perfection, and impact over ego.

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.

What you’ll get:

• Work with curious, ambitious people who care deeply about what they build
• See your code deployed at top‑tier EU & US financial institutions
• Full trust, real autonomy, and the ability to grow faster than anywhere else
• Flexible setup: full remote, full office, or anything in between
• Competitive compensation with real upside

What we don’t care about:

• Fancy résumés or name‑drop schools
• Free laundry or gimmicky perks
• Clocking hours — we measure outcomes, not input

Our hiring process

We keep our process fast, clear, and respectful of your time. Here’s what to expect:

1. Intro call – A 30‑minute conversation to get to know each other and align on expectations
2. Case study – A practical exercise to understand how you think and work
3. Founder interview – A deeper discussion with one of our cofounders to assess mutual fit and ambition
4. Offer – If it’s a match, we move fast to get you on board

You’ll get transparent communication at every step. We want this to be as much about you evaluating us as the other way around.