I'm Will Leece,

About

I build .NET web apps, from real-time SignalR wallboards to multi-tenant client portals, and I specialise in AI-output verification: building independent QA and checks around LLM-generated content rather than trusting model output directly.

Experience

• Mar 2025 – Present

  .NET Developer at Central Technology

  Remote · Chesterfield-based company

  • Build production AI features with Microsoft Agent Framework across a range of use cases, from chat interfaces to recommendation generators.
  • Set up AI-assisted development workflows in Codex and Claude, using optimised instruction files, execution plans and git worktrees. Running two to three workstreams in parallel at least doubles my throughput.
  • Built an AI benchmarking suite, packaged as a Codex skill, that compares any model available in Codex on a common task, and tests instruction files per model per task to find the best model and instruction file for each job.
  • Built SignalR wallboards and a reusable framework that gets a new branch its boards in about 20 minutes.
  • Build features for a multi-tenant client portal used by hundreds of client organisations and thousands of users, built in ASP.NET Core, Blazor and EF Core, where customers view their own data and submit requests.
  • Optimised many slow reports and queries, some from minutes to seconds, using parameterised OPENQUERY, subquery filtering and EF Core refactoring.
• Oct 2022 – Mar 2025

  Junior .NET Developer at Central Technology

  Chesterfield, UK · Hybrid

  • Built bespoke features across internal and customer-facing CRUD applications using ASP.NET Core, C#, and EF Core.
  • Authored bespoke reports for recurring operational issues and data forensics that turn manual investigation into repeatable tooling.