OLTP Data Architect

Project overview

Data Architect - OLTP/Transactional Databases

Great opportunity to join a large payments company working on a complex, high-volume transactional platform.

Requirements

• Proven experience designing or modelling transactional/OLTP databases that have gone into production
• Strong relational database design experience
• experience with PostgreSQL, Oracle or SQL Server
• Strong experience creating conceptual, logical and physical data models
• Ability to produce clear technical documentation that developers and engineers can work from

Nice to have

Reminder: this role does not provide sponsorship. Candidates must already have the right to work in the UK.

Job Title: OLTP Data Architect

• experience with distributed or NoSQL databases such as Cassandra, Google Spanner, Yugabyte or MongoDB
• Banking, financial services or payments experience
• experience with modelling tools such as ER/Studio or Erwin

Project details

London or South East England - 3 days per week in the office

Contract: 6-month initial contract, rolling

£300-£370 per day Umbrella

PLEASE NOTE: SPONSORSHIP IS NOT PROVIDED FOR THIS ROLE

Applicants must already have the right to work in the UK without requiring sponsorship.

What the role involves

London, UK

Job Type: Contract

Trading as TEKsystems. Allegis Group Limited, Bracknell, RG12 1RT, United Kingdom. No. 2876353. Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands.

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• Understanding and documenting a complex existing transactional platform
• Designing OLTP and system-of-record databases
• Creating conceptual, logical and physical data models
• Defining data standards and maintaining architecture documentation
• Working closely with developers and engineers to implement the architecture
• Start: 2026-10-29
• Location: London, GB-ENG, UK, GB