{"id":2597495,"url":"https://alion.io/job/photon-data-engineer-london-uk","title":"Data Engineer | London, UK","company":{"id":3186451,"name":"Photon","domain":"photon.com","url":"https://alion.io/company/photon-com","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Oracle","truth_index":{"grade":"D","score":44,"open_postings":455,"ghost_share":0.941,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-15T05:46:00Z"}},"role":"Data Science","role_family":"Data Science","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":39000,"max_usd":88000,"period":"year","method":"role_country_seniority_unknown","sample_n":159},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-07-14T01:39:20Z","employer_posted_date":"2026-07-14","last_verified_at":"2026-10-15T22:46:58Z","board_verified":true,"closed_at":null,"days_open":93,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":93},"description":"Role Summary\nWe are looking for experienced Data Engineers / Data Analysts to support a ledger migration and data clean-up initiative across the data lake, reporting and downstream feeds. The role will involve working on large-scale batch processing, data validation, regression testing and migration readiness activities within a financial services environment.\nKey Responsibilities\nSupport ledger migration activities, including data extraction, transformation, reconciliation and validation.\n\nWork on data lake clean-up, data quality checks, reporting pipelines and downstream feeds.\n\nDevelop, enhance and validate SQL queries, batch jobs and data processing logic.\n\nPerform regression testing on batch processes to ensure data accuracy and completeness before and after migration.\n\nCollaborate with engineering, product and business teams to understand migration requirements and resolve data issues.\n\nDocument data mapping, validation rules, test results and migration exceptions clearly.\n\nSupport production readiness, defect triage and post-migration validation activities.\n\nRequired Skills and Experience\nStrong hands-on experience with SQL and data analysis 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