Software architect for hire
I'm Lasse Numminen. For nearly twenty years I've built the software other teams get stuck on: AI systems, game engines, hardened backends. I've done it as a CTO, technical lead and consultant. Now you can hire that experience directly through my company, Mercenary Software.
Three fields that rarely overlap in one person. Hire me for any of them, or for the problems that sit in between.
Agent harnesses, deterministic LLM programming, and advanced RAG with careful data ingestion. I build AI systems that produce repeatable results. When your data can't leave the building, I deploy them self-hosted or fully air-gapped.
Microservices that survive production. AWS infrastructure, Kubernetes, Terraform and CI/CD pipelines, with security hardening throughout. That includes regulated industries under ISO 13485, GDPR and HIPAA.
From gameplay code down to the metal. I've shipped mobile games, restructured an MMO client, and built rendering and physics at engine level: Vulkan, render graphs, deterministic networked physics, tooling.
Client and employer names are withheld on purpose. Ask me about any of these and I'll gladly go deeper in person.
Designed and built a context engine and multi-agent orchestrator: given a goal, it plans its own tasks and validation layers while a human can step in at any point. Deployable in the customer's cloud or fully air-gapped.
Consulting engagements across GenAI application development, CI/CD, AWS infrastructure, Vulkan render graphs, gameplay architecture and deterministic networked physics.
Led development of HIPAA- and GDPR-compliant health monitoring software for mobile, built its AWS infrastructure, and prepared the product for ISO 13485 certification.
Owned full-stack architecture across multiple game products: Kubernetes microservices, CI/CD pipelines, AWS, and a high-performing development team I hired, built and mentored.
Tested and adjusted GPU silicon algorithms in software for a major hardware vendor, working in C and C++ on frame-rendering analysis.
Restructured the client architecture of an MMO, built a procedural map generator and a full map editor, and mentored fellow programmers.
Lead programmer on two shipped mobile games, founder of a web software company, POS systems specialist. I started programming at age 8 and have been paid for it since 2008.
You'll talk with me about what you need, and I'll do the work. That includes writing the code as well as making architecture decisions.
I can join your team as a contractor, take on a development project, or work with you as a part-time architect or CTO.
I work remotely from Finland. I've worked on medical software with strict privacy requirements and AI systems that run entirely on the customer's own infrastructure.
A few sentences are enough: what you're building and where it hurts. I'll tell you honestly whether I'm the right person for it.
Or use the form. It lands straight in my inbox.
Lasse Numminen
Software architect, Mercenary Software
