Tech Lead - Data Migration interview questions
Common interview questions and sample answers for Tech Lead - Data Migration roles in IT & Technology across Oman and the GCC.
The 10 questions below are compiled from interviews our consultants have run with IT & Technology employers across Oman and the wider GCC. Each comes with a sample answer and what the interviewer is really listening for.
Category
Opening & warm-up
How interviewers test your communication and preparation right from the start.
Walk me through your data migration career.
I've been in data migration for eight years, four in Oman. Started in data engineering at an Indian banking IT firm, specialised into migration over time, and for the past three years I've been tech lead for data migration at an Omani Tier-1 bank's transformation programme. My remit: migration strategy, tool selection, design, execution oversight across major migrations. Multiple data certifications plus tool expertise.
Data migration scope.
Category
Behavioural (STAR)
Past-experience questions. Use the STAR framework: Situation, Task, Action, Result.
Tell me about a major migration.
Last year I led the core banking data migration: 5M customer records, 50M transaction records, historical data across 20 years. Eighteen months of work covering profiling, design, multiple test cycles, parallel run, cutover. Data integrity preserved; business operations continuous through cutover. Major migrations succeed on rigorous methodology; ad hoc migration is how data goes missing.
Major migration delivery.
Describe a migration issue.
Test migration revealed data anomalies that weren't visible in source profiling: edge cases triggered by specific historical conditions. Documented every anomaly; designed handling per anomaly type. Final migration handled all categories. Migration testing surfaces what profiling misses; rigorous testing pays back.
Migration discipline.
Tell me about leading the team.
Eight engineers reporting to me on migration: ETL developers, data analysts, validators. Workload distributed per skill. Daily standups during execution phases. Joint review of edge cases. Team morale strong despite intense work; people perform when they feel supported.
Team leadership.
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Technical & role-specific
Questions that test your specific skills for this role.
Walk me through your migration methodology.
Data profiling source. Mapping to target with transformation logic. Reconciliation rules defined. Multiple test cycles: each with progressively more realistic data and conditions. Parallel run validates target against source in production-like conditions. Cutover with rollback plan. Post-cutover reconciliation. Methodology discipline determines outcome.
Migration methodology.
Describe data profiling.
Source data examined for completeness, validity, consistency, uniqueness, relationships. Anomalies catalogued. Patterns surfaced. Edge cases identified. Profiling output drives mapping decisions and transformation logic. Time invested in profiling reduces surprises during migration.
Profiling depth.
How do you handle reconciliation?
Multiple reconciliation levels: record counts, field totals, sample record comparison, business-meaningful aggregates. Reconciliation rules cover the data dimensions that matter. Discrepancies investigated to closure. Sign-off only after reconciliation completes. Reconciliation rigour is the difference between a successful migration and a migration that introduces problems for years.
Reconciliation depth.
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Situational
Hypothetical scenarios designed to test your judgement and approach.
Late in migration testing, business identifies a fundamental data issue. What do you do?
Honest assessment of impact. Engage business and programme leadership with the situation. Decide: accommodate via additional transformation, defer migration for source-system fix, scope reduction. Decision goes to programme governance with full information. Hiding fundamental issues to maintain schedule produces failed migrations.
Transparency.
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Cultural fit & motivation
Why this role, why this company, and how you work with others.
How do you work with business owners?
Business owns the data semantics; my role implements migration with their oversight. I engage them in mapping decisions, validation of edge cases, sign-off on outputs. Their domain knowledge prevents migration errors. The relationship is partnership.
Business partnership.
Category
Closing
The final stretch. Often where deals are won or lost.
What are your salary expectations?
For a senior tech lead for data migration role at an Omani Tier-1 bank I'd target OMR 2,800 to 3,600 total package depending on programme scope and team size. Major-migration leadership commands a premium. I'd expect annual bonus and certification budget. I'm on 60-90 days' notice. Beyond pay I'd value the transformation programme's strategic positioning.
Range preference.
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