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Updated weekly · Last refresh Sep 22

Alcorce Telecomunicaciones Sl Backend Engineer Interview Questions

The questions to prepare for a Alcorce Telecomunicaciones Sl Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
Behavioral & LeadershipStart here. 3 questions · ~24 min
Explaining Your Backend BackgroundMedium

Assesses your backend experience and ability to clearly communicate relevant technologies.

experienceAlcorce Telecomunicaciones Sl
Negotiating API ContractsMedium

Assesses your collaboration, communication, and trade-off management with frontend partners.

collaborationAlcorce Telecomunicaciones Sl
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2
More topics6 questions · ~48 min
Data Transformation for React FrontendMedium

Assesses your ability to shape backend responses for clean, reliable frontend consumption.

backend integrationAlcorce Telecomunicaciones Sl
Database Connection PoolingMedium

Evaluates your approach to maintaining database performance and stability under load.

performance optimizationAlcorce Telecomunicaciones Sl
Auth for Single-Page AppsMedium

Tests your security design for auth flows and access control in SPA architectures.

authenticationauthorizationAlcorce Telecomunicaciones Sl
Scalable API Design for FrontendMedium

Assesses your ability to design APIs that scale and remain developer-friendly for frontend teams.

api designscalabilityAlcorce Telecomunicaciones Sl
Async vs Sync Backend ProcessingMedium

Assesses your understanding of sync and async execution models in backend systems.

Alcorce Telecomunicaciones Sl
Relational Query Performance TuningMedium

Evaluates your techniques for improving query efficiency and reducing database bottlenecks.

Performance Tuningrelational databasesquery optimizationAlcorce Telecomunicaciones Sl

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Refactoring a Slow QueryMedium
Practice
Practice drill

Refactor a slow Candid Health claims query using pre-aggregation, latest-event logic, and monthly payer metrics.

Performance Tuningdatabase optimizationCTEsCandid Health
Optimizing Slow QueriesHard
Practice
Practice drill

Diagnose and optimize a slow PostgreSQL aggregation query involving joins, filtering, and customer-level totals.

Performance Tuningdatabase optimizationJoinsMedpace
Optimizing Slow SQL QueriesHard
Practice
Practice drill

Optimize a PostgreSQL transaction query that filters, aggregates, ranks, and returns top merchants efficiently on large tables.

Performance Tuningdatabase optimizationlarge datasetsSprinter HealthSentiLinkAutodesk
The finish line: interview-readyComplete all 9 questions plus 3 hands-on drills to finish this plan.