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Updated weekly · Last refresh Oct 17

SwissBorg Software Engineer Interview Questions

The questions to prepare for a SwissBorg Software Engineer interview. Questions from real interview reports rank first. Updated daily.

23questions
~3htotal time
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1
CodingStart here. 5 questions · ~40 min
Currency Arbitrage AlgorithmHard

Evaluates algorithm design and correctness for a trading-related problem.

SwissBorg
Akka or Pekko Actor ModelMedium

Tests knowledge of actor-based concurrency and resilience patterns in distributed systems.

fault toleranceconcurrencySwissBorg
Scala Type ClassesMedium

Tests understanding of Scala abstractions and how to design extensible, type-safe APIs.

abstractionSwissBorg
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2
Execution6 questions · ~49 min
Exactly-Once Distributed TransactionsHard

Tests system design for correctness under retries, failures, and distributed coordination.

distributed systemsconsistencySwissBorg
Rate Limiting for Public APIsMedium

Tests ability to protect services from abuse while maintaining reliability and predictable behavior.

throughputrate limitingSwissBorg
Production-Ready ImprovementsMedium

Assesses your approach to hardening software for reliability, observability, and maintainability.

SwissBorg
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3
Behavioral & Leadership11 questions · ~89 min
Balancing Technical Debt and DeadlineMedium

Tests prioritization under pressure, technical judgment, and stakeholder management when technical debt threatens a client deadline.

client deadlineConflict Resolutiontechnical debtSwissBorg
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4
More topics1 question · ~8 min
Database Types and Use CasesEasy

Tests breadth of database knowledge and ability to map databases to use cases.

SwissBorg

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Database Consistency Under ConcurrencyMedium
Practice
Practice drill

Audit account balances against posted ledger entries using aggregation and NULL-safe balance calculations.

deadlocksacid propertiesdata integrityRevolut
SQL Concurrency and LocksHard
Practice
Practice drill

Identify waiting PostgreSQL lock requests and the granted requests that block them.

deadlocksdatabase managementACIDDeel
Optimizing Slow SQL QueriesHard
Practice
Practice drill

Identify rolled-back or lock-waiting transactions and summarize their concurrency impact using aggregation and a left join.

deadlocksdatabase managementACIDDeel
The finish line: interview-readyComplete all 23 questions plus 3 hands-on drills to finish this plan.