hello world
Cosmin Onea
Software Consultant / Serial Entrepreneur
Helping teams ship better software through pragmatic architecture, domain-driven design, and lean engineering practices.
About
who I am
I'm a software consultant, founder, and tech lead with over 25 years of experience building and scaling software systems. I've led engineering teams at companies like SiriusXM, Springer Nature, Pret A Manger, and Just Eat — working across payments, e-commerce, publishing, and media.
I specialise in turning complex domains into clean, maintainable architectures. Whether it's designing event-driven systems, introducing domain-driven design to a legacy codebase, or setting up lean delivery practices for a startup, I focus on solutions that work today and scale tomorrow.
As a founder, I co-founded Contingent Technologies (VC-backed) and built QontaHub, a modern accounting practice management platform. I bring the same pragmatic, product-minded approach to every engagement.
Skills & Disciplines
architecture
engineering
practices
domain
Experience
career.map()
Kingfisher
Leading development of e-commerce platform capabilities across B&Q and Screwfix brands, focusing on scalable architecture and delivery excellence.
SiriusXM
Led engineering teams building streaming platform features, driving architectural decisions and delivery practices for a global media product.
Springer Nature
Built content delivery and publishing platform systems for one of the world's largest academic publishers.
Pret A Manger
Developed e-commerce and digital ordering systems during a period of rapid digital transformation.
Contingent Technologies
→ venturesCo-founded a VC-backed startup, building the product from zero, raising funding, and bootstrapping the engineering team.
Tesco
Worked on large-scale retail platform systems serving millions of customers across grocery and general merchandise.
Informa
Built content management and digital publishing platforms for a leading events and academic publishing group.
Just Eat
Developed core platform features for one of the UK's largest food delivery marketplaces during a period of hyper-growth.
Ventures
founder.projects()
QontaHub
CEO / CTOA modern Accounting Practice Management product designed to streamline workflows for accounting firms — from client onboarding to task management and compliance tracking.
- ▸ Built from the ground up as a SaaS platform
- ▸ Full product ownership: strategy, architecture, and engineering
- ▸ Focused on replacing legacy tools with a modern, intuitive experience
Contingent Technologies
Chief Product Officer / Senior EngineerCo-founded a VC-backed startup tackling workforce management. Raised funding, bootstrapped the engineering team, and built the product from zero to market.
- ▸ Raised venture capital funding
- ▸ Recruited and led the founding engineering team
- ▸ Designed and built the core platform architecture
Contact
get in touch
Interested in working together or have a question? Drop me an email or connect on social media.