Jordan Gregory-Wallis | .NET Software Engineer

About

Senior Software Engineer with 10+ years' experience building and modernising web-based C#/.NET applications, with a strong track record refactoring and modernising large legacy monolith systems, including full .NET Framework to .NET Core rewrites and large-scale Entity Framework migrations. Experienced across the GitHub ecosystem, including Git, GitHub Actions, and CI/CD workflows, primarily within the insurance industry.

Focused on delivering reliable, well-tested software within Agile teams, working closely with Product Owners, testers, and stakeholders. Comfortable adopting AI-assisted development workflows where they meaningfully improve delivery speed and quality.

Sydney, Australia · Working Holiday Visa

Motorcycles · Running · Travel · Reading

Experience

Professional Development & Portfolio Sydney, Australia · Personal

June 2026 – Present

Deepening expertise in distributed systems, API design, and legacy modernisation through structured study and working on personal projects
Working on personal projects to apply and expand technical skills
Available for 3-6 month .NET contract roles across Australia

Career Break – Travel & Relocation South East Asia · Personal

Dec 2025 – May 2026

Career break spent travelling across South East Asia before relocating to Australia on a Working Holiday Visa

Ignite (a Verisk business) Manchester, United Kingdom · Hybrid

Lead Software Engineer · Jan 2025 – Nov 2025

Senior Software Engineer · Sep 2021 – Jan 2025

Software Engineer · Sep 2019 – Sep 2021

Led development and technical direction across multiple insurance platforms built on C#/.NET, Typescript/VUE, and SQL Server
Contributed to removal of 500k+ lines of legacy code as part of a wider simplification and modernisation initiative
Single-handedly rewrote a business-critical internal configuration application, used by all site stakeholders, from .NET Framework 4.6.2 (WebForms, Entity Framework) to .NET 9, writing tests upfront to verify existing behaviour was preserved through the migration
Built the application's CI/CD pipelines in GitHub Actions, with guidance from a senior DevOps engineer, enabling automated build, test and deployment for the rewritten application
Used the rewrite to remove unused legacy features and ship a long-requested new feature at release, delivering the full migration in around six weeks alongside core responsibilities, with GitHub Copilot and Claude Code used to accelerate the refactor
Contributed to the planning and execution of a large-scale Entity Framework 6 to EF Core migration on a business-critical legacy monolith, rewriting hundreds to thousands of model files and updating surrounding infrastructure logic as part of a cross-department engineering effort
Helped manage regression risk on this high-risk migration through a combined strategy of unit, manual and automated testing, ensuring a safe, correct cutover across the full application

Club Systems International Ltd Manchester, United Kingdom · On-site

Software Engineer · Sep 2018 – Sep 2019

Built fully tested software using ASP.NET MVC

Lightening e-com Ltd Manchester, United Kingdom · Freelance

Freelance Software Engineer · Nov 2018 – May 2019

Undertook a freelance software engineering role alongside full-time work

Ignite (a Verisk business) Manchester, United Kingdom · On-site

Software Engineer · Jan 2016 - Aug 2018

Junior Software Engineer · Jan 2015 - Dec 2015

Junior Quality Assurance Engineer (Apprenticeship) · Jul 2014 - Dec 2014

QA Engineer apprentice progressing into software development

Skills

Languages & Frameworks

C# .NET / .NET Core ASP.NET MVC ASP.NET Web API ASP.NET WebForms Entity Framework TypeScript JavaScript Vue.js SQL HTML CSS SASS

Databases & Infrastructure

SQL Server Redis Microsoft Azure GitHub Actions Docker Kubernetes

Testing & Quality

NUnit XUnit Moq FluentAssertions Cypress Playwright TDD

Logging & Monitoring

Serilog Application Insights Azure Monitor Grafana Loki

Tooling & Collaboration

Git GitHub Azure DevOps Jira Linear Miro Lucidchart

AI Tools

I've integrated AI tools into my development workflow to meaningfully improve productivity and delivery speed. That means knowing when to use them, when not to, and always verifying the output.

Claude Code

My go-to for complex reasoning, code review, and architecture discussions. Runs as a CLI in the terminal, making it feel like pair programming. I use it for iterative development, refactoring, and especially like the planning mode feature.

Codex

OpenAI's agentic coding tool, built for terminal-first development workflows. I use it for scaffolding, refactoring tasks, and letting it run autonomously on well-scoped problems. I like it because it can iterate without hand-holding, allowing me to focus on higher-level decisions.

GitHub Copilot

IDE-integrated autocompletion that reduces friction during day-to-day coding. Even when I need to write code from scratch, Copilot helps me stay in the flow by suggesting completions and entire functions based on context.