Hello I'm

Tomi Tuomainen

Software Architect
Integration Architecture & Applied AI

Architecture, hands-on development and practical AI.
Tomi Tuomainen




What I do

I combine software and integration architecture with hands-on development, drawing on 25+ years of experience in public-sector, pension insurance and enterprise systems.
My work spans system design and modernisation, implementation and delivery automation. I apply AI across architecture, code, infrastructure, testing and documentation.
I also support technical delivery, coach and mentor teams, and help organisations adopt practical AI. My approach builds on Agile, DevOps and Clean Code.
  • Development
  • Architecture
  • Integrations
  • Applied AI

Code

Hands-on backend and full-stack development, code reviews and delivery automation. Practical AI agents and workflows support implementation, testing and documentation.

System Architecture

Software and integration architecture for long-lived systems: system structure, APIs, data modelling and modernisation. From architectural decisions to working implementation.

Team

Technical delivery leadership, training and mentoring for development teams. I guide practical AI adoption and offer training and talks on software architecture and applied AI.

Download CV

Experience

Software and integration architecture, hands-on delivery, applied AI and technical leadership.

Approximate years of experience by area

Architecture and integrations

20+ years
  • Enterprise systems, modular monoliths and microservices
  • APIs, domain and database modelling
  • System modernisation

Hands-on delivery

20+ years
  • Backend and full-stack development
  • Code reviews and performance analysis
  • CI/CD, infrastructure automation and DevOps

Applied AI

4+ years
  • AI agents, workflows and harness engineering
  • Reusable team skills, agents and MCP servers
  • AI-assisted architecture, code, infrastructure, testing and documentation

Technical leadership

10+ years
  • Delivery planning and team coordination
  • Stakeholder coordination, risk and issue management
  • Scrum support, training, coaching and mentoring





Client Reviews

Finnish Food Authority

Recognized expert on coding and integrations.

Topi Laamanen

Director of Application Development,
Finnish Food Authority
Siili Solutions - original recommendation

True hands-on architect, ready to help with any software project challenge.

Olli Sorvari

Account Director, Solita
Recommendation from his time at Siili Solutions.
LeadDesk

Experienced system architect with focus on working solutions.

Jarno Tenni

VP of Engineering,
LeadDesk