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Sergii Iegorov

Value Engineer

A technology leader who has spent more than fifteen years rising from software engineer to Director of Technology Solutions inside a global engineering and consulting firm. Now at Valliance, he's helping clients turn hard engineering problems into systems that deliver measurable value.

Sergii's path runs through every layer of the discipline, from writing code to leading teams to architecting enterprise systems for some of retail's most demanding brands, including John Lewis, Screwfix, Specsavers, Telefónica O2 and The Very Group. He's a champion of composable architecture, and pairs that technical depth with a founder's instinct for building things that last. His work turns ambitious architectural bets into outcomes the business can feel, whether that's faster training, shorter call times or a platform rebuilt without breaking stride.


  • Conceived, planned and delivered one of the industry's most ambitious monolith decomposition programmes for Screwfix

  • Delivered an order management solution for John Lewis, cutting staff training times by 95% and call times by 60%

  • Reimagined the entire digital ecosystem for Joe & The Juice, completing the replatforming at pace

  • Pioneered composable architectures and helped promote and govern them as a member of the MACH Alliance tech council


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