Barclays Technology Interview 2027: Coding, SQL & What to Expect
For the 2027 intake, the Barclays technology interview combines a Codility online assessment with technical interviews covering coding, SQL, and computer science fundamentals. Expect data structures and algorithms questions, around five SQL problems testing joins and aggregations, and behavioral questions on teamwork and Barclays' values. University coursework alone will not cover everything they test.
What the Barclays technology interview tests
The process usually starts with a Codility assessment: two or three timed coding problems in your chosen language. Candidates who pass move to technical interviews with engineers, covering algorithms, data structures, SQL queries, and sometimes system design basics for experienced hires. The Barclays technology interview also includes behavioral rounds on collaboration, problem-solving, and motivation for the bank. Both halves are eliminatory.
The SQL and coding topics that come up most
SQL questions focus on joins, group by with having, subqueries, and window functions. Coding problems lean toward arrays, strings, hash maps, and basic graph or tree traversal. Interviewers care about clean, working code and clear thinking out loud more than optimal solutions. Common follow-ups include time complexity analysis and how you would test your code. Practise explaining your approach before you write a line.
How to prepare for the Barclays technology interview
Do timed Codility-style problems until two medium problems in 60 minutes feels comfortable. Drill SQL daily with a focus on joins and window functions, since those separate prepared candidates from the rest. Review complexity analysis and be ready to talk through trade-offs. For the behavioral half, prepare STAR examples on teamwork and debugging under pressure. Our 2027 prep pack covers the exact Barclays technology interview questions and answers, including the real Codility and SQL formats, so you practise what you will actually face.
Technology roles at Barclays test skills most degree courses never teach to interview depth. For the 2027 intake, assessments run during the 2026 application season. Start coding drills before you apply, and check the official careers page for current stage details.
FAQ
What language can I use in the Barclays Codility test? Codility supports major languages. Use the one you are strongest in.
How hard are the Barclays technology interview coding questions? Typically easy to medium LeetCode level, with emphasis on clear reasoning.
Does Barclays ask system design for graduates? Rarely for graduate roles. Focus on coding, SQL, and fundamentals.
Is there a behavioral round in the Barclays technology interview? Yes. Expect teamwork, problem-solving, and motivation questions alongside the technical rounds.
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