Romain Diegoni

Open to Opportunities

I help engineering teams ship faster with agentic workflows.

15+ Years building software
Agentic Workflow builder
2,500+ LinkedIn followers
10x Faster delivery

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Photo of Romain Diegoni

<About />

From trading floors to agentic workflows

I started building trading systems at Société Générale and Natixis, then moved to London where I helped TrueLayer ship their first payment product and built a design system used by 8+ teams. Along the way I founded SubVortex, a decentralized subnet in the Bittensor ecosystem. 15+ years across investment banking, fintech, blockchain, and developer tooling shaped how I think about software: every line of code should serve the business and the people using it.

Today I design agentic workflows. Systems where AI agents take over the repetitive engineering work so your team can focus on problems worth solving. I wire these into existing codebases and CI/CD pipelines, turning what used to take days into hours. The goal is simple: multiply your engineering velocity without multiplying your headcount.

I'm open to full-time roles, contract work, or short-term engagements. Whether it's hands-on development, technical advisory, architecture reviews, or early-stage brainstorming. If you have a team that should be shipping faster, I can probably help.

Outside of code, you'll find me with family and friends. The only system I don't try to optimize.

<Experience />

15+ years building trading systems, platforms, and agentic workflows

SubVortex

Founder

London, UK · Remote
  • Founded and delivered a production decentralized subnet within the Bittensor ecosystem, providing programmatic access to distributed nodes
  • Acted as product owner and principal engineer, owning system architecture, protocol design, incentives, and operational reliability
  • Designed backend services in Python to manage node discovery, routing, availability tracking, scoring, and performance optimization in a distributed environment
  • Built internal and public-facing React dashboards to monitor subnet health, node behavior, incentives, and moderation workflows
PythonReactRustSubstrateBittensor

Aer Compliance

Senior Software Engineer

London, UK · Hybrid
  • Developed features in response to customer feedback, leading to a significant boost in customer satisfaction ratings
  • Led the development of a new feature that increased user engagement
  • Integrated E2E tests to verify complete system functionality and user interactions
  • Established CI/CD pipelines that reduced deployment time and improved code quality
ReactTypeScriptNode.jsCI/CD

TrueLayer

Full Stack Engineer / Lead Engineer

London, UK
  • Developed the V1 of the payment product leading up to early stage of fundraising
  • Built the V2 of the console by applying Domain-Driven Design
  • Led the implementation of the internal Design System with 90 components and 3 themes, enabling cross-functional teams to deliver faster
  • Managed direct reports and provided services to 8+ internal teams
ReactTypeScriptNode.jsDesign SystemsDDD

Anabode

Co-Founder · Engineer

London, UK
  • Developed a cross-platform mobile application in Xamarin Forms with minimal Android/iOS-specific code
  • Set up AWS infrastructure including Cognito, S3, Lambda, Step Functions, and DynamoDB
  • Collaborated closely with the co-founder to build a scalable, maintainable codebase
XamarinC#AWSLambdaDynamoDB

Perfect Channel

Web Developer

London, UK
  • Designed and built a global bidding engine solution that facilitates the injection of auction models
  • Developed a complete reverse auction model from scratch
  • Turned the system into an extensible product using microservices with APIs and web components
C#.NETJavaScriptMicroservicesWeb Components

AXA Investment Managers

Architect .NET

Paris, France
  • Part of the architecture team guiding developers on high-level design choices, coding standards, tools, and platforms
  • Designed and implemented a WCF gateway importing Excel files in a platform-as-a-service provider (ServiceNow)
  • Set up continuous integration for around 120 Java and .NET projects
C#.NETWCFCI/CDArchitecture

Société Générale (SGCIB)

Senior Software Developer

Paris, France
  • Built market making software from scratch for Money Market traders: GUI, Negotiation Engine, Contributor, and Scheduler
  • Designed and implemented batch publishing of RFQ statistics by mail for the unanswered ones
  • Developed tools for Forex Market Makers in the front office team, improving productivity in a secure context
C#.NETWPFSQL ServerTrading Systems

Natixis

Software Developer

Paris, France
  • Managed 6 software applications on a perimeter of about 10, working independently
  • Designed and implemented 15 batches for recomputing net values of funds, stock counts, and other financial calculations
  • Built Winform software for middle office to retrieve and validate Bloomberg quotations
C#.NETWinFormsSQL ServerBloomberg

Projects I've built or led from concept to production

SubVortex

Decentralized subnet within the Bittensor ecosystem providing programmatic access to distributed nodes. Founded, architected, and delivered as a fully functional external product.

PythonReactRustSubstrateBittensor

TrueLayer Design System

Internal design system with 90 components and 3 themes, enabling cross-functional teams across 8+ internal teams to ship faster and maintain visual consistency.

ReactTypeScriptStorybookDesign Tokens

romaindiegoni.com

This portfolio site. Static Astro build with LinkedIn data pipeline, brand token system, and Lighthouse 90+ scores.

AstroTypeScriptCloudflare Pages

<Contact />

I'm always open to discussing new projects, engineering challenges, or opportunities to collaborate

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