About Us
Get to know the people behind Trading Interview
Trading Interview was built by two people with a tech background, who went through trading interviews, and then went back and sat on the other side of them.
Tolga Celebi
Co-founder
Tolga is a quant trader. He has 3 years of experience trading at All Options, where he was also part of the hiring process: he interviewed candidates for trading roles, and he trained and guided new hires through their first months on the desk.
That combination is the reason Trading Interview exists in the shape it does. Tolga has seen the same interview from three angles:
- as the candidate sweating through it,
- as the interviewer deciding on the other side of the table,
- and as the person who later has to turn a new hire into a functioning trader.
Very few people building interview preparation material have sat in all three seats, and it changes what you think is worth teaching. Tolga designed Trading Interview's market making games and works on all content on the platform.
Before trading, Tolga studied aerospace engineering at Delft University of Technology, took a master's in econometrics, and worked as a working student at Rabobank.
Douwe ten Brink
Co-founder
Douwe is Trading Interview's engineer. After studying aerospace engineering at Delft University of Technology, he worked in data science at Adyen, one of Europe's largest payment providers, and then as an automation and real-time control engineer, before leaving to build Trading Interview from the ground up. The experience was invaluable, but the itch to build something from the ground up persisted. So, when we discussed the idea of the platform, it resonated perfectly with what he sought: a fresh venture built from scratch. Douwe builds the platform, the question engine, and the real-time infrastructure behind marketmakinggames.com , the multiplayer market making games run on systems he designed.
Why we built it
Tolga and Douwe met in 2013 as aerospace engineering students at Delft. Years later, when Tolga was preparing for trading interviews, the problem was obvious and unsolved: the material was scattered across forums, PDFs, and half-remembered advice, and on top of that: none of it prepared anyone for the market making game rounds. You cannot practise market making alone. It requires a counterparty who genuinely wants the other side of your quote, and in 2020 there was nowhere to find one.
So they built one.
Trading Interview today
Trading Interview launched in early 2020 and is the longest-running interview preparation platform built specifically for trading roles. Trading Interview is used by candidates worldwide, from final-year students to experienced traders moving between firms.
- 900+ interview questions, each with a full worked solution and hints structured the way an interviewer releases them.
- Eleven courses: Mental Arithmetic, Sequences, Market Making, Probability and Statistics, Brain Teasers, Derivatives Theory, Digital Assets and Crypto, Energy Trading, Linear Algebra, Asset Pricing, and Programming Interview Questions.
- Eleven company preparation courses, covering more in depth insights to prepare for specific firms, with new firms added regularly. All sources are relevant for other firms in this space as well.
- The widest range of market making games in the industry, and the only real-time multiplayer market making platform there is. On marketmakinggames.com, included free with the Trading Interview membership, candidates quote two-way prices against live opponents, compete in tournaments, and run private rooms with their university societies.
- Mock interviews conducted by a practitioner who has traded, interviewed candidates, and trained new hires.
- Rated 4.7 out of 5 on Trustpilot.
Since 2023, Trading Interview has also worked as an assessment provider for trading firms. Trading Interview's assessments are integrated into the live hiring processes of All Options and Flow Traders. Trading Interview therefore sits on both sides of the trading interview: preparing candidates for it, and helping firms run it.
Trading Interview works with university societies including the Amsterdam Investment Club and NEFS Quant, and others. If you want to work together: reach out!
Our expertise in preparing candidates for assessments isn't limited to trading. If you're based in the Netherlands and aspiring to become an airline pilot, check out our specialized pilot assessment training at PilotenAssessmentTraining.nl.
Stay Connected!
Contact us
Trading Interview B.V.
Schiebroekselaan 53B
3037 RK
Rotterdam
The Netherlands
hello@tradinginterview.com
CoC: 96095911
VAT: NL867467344B01