Who's behind Mockly
Mockly is run by two UK-based data engineers who are also qualified English instructors. We built it because the usual advice for non-native speakers treats interview English as a language problem, when it's really a language problem and a technical-communication problem at the same time.
Everything here — the guides, the articles, and the mock sessions — is written by people who sit on both sides of that problem: we work as engineers, and we teach English for a living.
Tom O.
Data Engineer & ESL Instructor
- BSc Mathematics
- British · UK-based
- 1,840+ lessons delivered
Tom is a practising data engineer in the UK and a qualified ESL instructor. He coaches the technical side of interview English — narrating a system design diagram out loud, structuring a STAR answer so the result lands, and telling the kind of ownership story that senior and staff-level panels are listening for. He writes most of the system design and behavioural material on this site.
Coaches
- · Technical English for system design rounds
- · STAR-based behavioural preparation
- · Storytelling for senior and staff-level roles
Sophie F.
Data Engineer & English Coach
- BSc Mathematics
- British · UK-based
- 920+ lessons delivered
Sophie is a practising data engineer in the UK and an English coach for non-native speakers. She works on fluency under pressure — the tone, pacing, and confidence that decide how a technically correct answer actually sounds to a British or American panel. She focuses on behavioural and leadership rounds, and on the habits that stop people freezing mid-sentence.
Coaches
- · British English fluency under interview pressure
- · Behavioural and leadership round coaching
- · Tone, pacing, and confidence for non-native speakers
What people say about the coaching
Across published reviews, engineers consistently highlight three things: coaches who pair language teaching with real experience in the IT industry, preparation that covers behavioural, algorithm, and system design rounds rather than English in isolation, and tangible outcomes — several reviewers report passing interviews and accepting offers after coaching. Reviewers also mention practical extras such as CV and cover-letter feedback, and describe the coaching as tailored to their specific weak points rather than a fixed curriculum.
Read the full reviewsHow we write what's on this site
Every guide and article comes from sessions we've actually run. When we write that a phrase fails in a system design round, it's because we've heard it fail. We update posts when the advice changes rather than leaving stale pages up, and each article carries a Quick Answer at the top so you can get the short version without reading the whole thing.