Microsoft Platform Specialists · UK Based
Senior engineers who've lived inside WebForms, VB.NET, classic ASP and SQL Server for decades — and know how to move them forward without breaking what matters.
01 — Why Synesio
Most firms will tell you to rewrite everything in React and move on. We won't. Microsoft legacy systems — WebForms, VB.NET, classic ASP, bespoke CMS — contain decades of real business logic that can't be recreated from a spec document.
We've been working inside these systems since they were new. That experience means fewer surprises, faster diagnosis, and migrations that actually stick.
01
Microsoft-first depth
We don't dabble. The Microsoft stack is all we do — from .NET 1.1 to .NET 10, SQL Server 2000 to 2025.
02
Senior engineers only
No juniors handed the wheel. Every engagement is led by developers with 10+ years on the platform.
03
Preserve business logic
We extract, document, and protect the logic buried in your legacy code before touching a single line.
04
UK-based, always
Our entire team is in the UK. Same timezone, same accountability, no offshore handoffs.
02 — Services
From emergency support to full platform migration — built around the Microsoft technologies your business runs on.
Legacy .NET Support & Rescue
Ongoing maintenance, critical bug fixing and emergency support for .NET Framework applications that others won't touch — WebForms, WinForms, ASMX web services and more.
Modernisation & Migration
Phased migration from legacy .NET Framework to modern .NET — retaining business logic while gaining performance, security and long-term supportability. VB.NET to C# conversions included.
SQL Server Modernisation
Version upgrades, performance tuning, stored procedure refactoring, and migrations from SQL Server 2000/2005/2008 to current versions — including Azure SQL and SQL Managed Instance.
Website & CMS Rescue
Classic ASP, old WebForms sites, end-of-life Umbraco, Sitecore, DNN and bespoke CMS platforms — we rescue, stabilise and migrate them to modern, maintainable alternatives.
Azure Migration & Cloud
Lift-and-shift or re-architect — we move your .NET and SQL Server workloads to Azure, leveraging App Service, Azure SQL, Functions, and the full Microsoft cloud ecosystem.
AI & Copilot Integration
We integrate Microsoft AI capabilities — Azure OpenAI, Copilot Studio, AI Search — directly into your existing .NET and SharePoint systems. No full rewrite needed.
04 — Our Approach
Legacy .NET projects have derailed before — usually because the team underestimated what was hidden inside the system. We don't make that mistake. Our process starts with understanding, not assumptions.
Codebase Archaeology
We read the code before touching it. Assembly analysis, dependency scanning, database schema review — we build a complete picture of what you have and what it does.
Honest Risk Assessment
We produce a plain-English risk register: what's fragile, what's undocumented, what's tightly coupled. No sales optimism — just the facts.
Phased Roadmap
We design a delivery plan that keeps your application running throughout — no big-bang rewrites, no single points of failure in the migration itself.
Direct Engineer Access
You work directly with the engineers doing the work, not account managers. Clear milestones, weekly updates, and no surprises.
Documentation & Handover
Every engagement closes with full documentation, architectural diagrams, and a handover your internal team can actually use.
05 — Full Technology Range
Languages
Frameworks & Platforms
Data & CMS
Cloud & Modern
06 — About
Synesio was founded by senior .NET developers who were tired of watching businesses get burned by firms that didn't understand what was really inside their systems.
We're a tight, senior-only team based across the UK. No offshore handoffs, no juniors shadowing. When you hire Synesio, the engineers you meet in the first call are the engineers who do the work.
We've delivered for businesses in financial services, insurance, manufacturing, legal, retail, and the public sector — wherever Microsoft technologies are running systems that can't afford to go down.
07 — Contact
No sales pitch, no slide deck. Just a conversation with an engineer who's probably worked on your version of the framework before.