El proceso tomó 2 semanas. Acudí a una entrevista en payabl. (Frankfurt am Main)
Entrevista
Technical Interview Round Description:
Sit down and get introduced to each other. Got offered Coffee/Water. Starred talking about past experiences. Generic questions about software development, architecture, used tools. Solved some technical questions (reading code, finding flaws, and writing some improved code). Got asked some additional questions. Then I asked some questions about the company. They sjowed me the office. I went home :)
Preguntas de entrevista [1]
Pregunta 1
Which tools did you use or work with in the past? Then followed up by some deeper questions about MongoDB.
Me postulé en línea. Acudí a una entrevista en payabl. (Frankfurt am Main) en feb 2026
Entrevista
As written in thier site. HR, technical live coding, discussion with tech lead and offer. Interview was good with good questions and calm environment. Live coding session was important here.
Preguntas de entrevista [1]
Pregunta 1
Payabl Interview Questions (Feb 10, 2025)
SQL/Database Questions
1. What's the difference between WHERE and HAVING?
Coding Exercise
2. Write payment endpoints in any framework you want (I chose FastAPI)
* Implement POST endpoint (create transaction)
* Implement GET endpoint (retrieve transaction)
* Store data locally (no database needed)
* Note: I asked about idempotency, interviewer said "ignore it for now, but nice you know that"
Security/Authentication
3. How do you protect endpoints?
4. How do you do authorization?
Validation
5. How do you implement validation logic?
Performance/Optimization
6. What would you do if you need to query 10 million rows and it takes too long?
Behavioral Questions
7. What will you do if someone gives you review comments?
8. What challenges have you solved and what do you feel proud about?
DevOps/Docker
9. How do you see logs in Docker?
10. What if you can't attach to the container