MinMax Engineering Oy
Senior Software Development & Technical Leadership
Accelerate your product development without heavy recruitment.
Get senior-level development and CTO perspective in one package — supercharged with AI tooling. If you need an implementer who understands both technology and business, you're in the right place.
What I do
Data & AI from lab to production
Instead of just proof-of-concepts, I build solutions that actually work in the real world. I handle data pipelines, integrate models into APIs, and ensure the whole system is monitored and results are measurable.
Robust backends & seamless integrations
Modern and secure backend solutions (FastAPI/Node.js) along with smooth integrations from payment processing to external APIs (GraphQL/REST). The groundwork is done right from the start, ensuring the architecture remains resilient as you scale.
Quality, speed, and automatic scalability
When user numbers grow, the system must hold up. I drive performance optimization, improve software testability, and build precise observability so that costs stay under control and code remains high-quality.
Fractional CTO — Leadership expertise on demand
Does your team need technical direction and decision-making capability? I serve as your outsourced technology leader: taking ownership of architecture and driving development forward without the commitment of hiring a full-time executive.
How I work
Smart start
A quick situation assessment. Direct problem-solving without the bureaucratic overhead.
Continuous delivery
No black boxes. I ship working code frequently so you see concrete results right away.
Quality from day one
Performance, testing, and monitoring are part of ongoing development. A solid foundation is built from the start.
No vendor lock-in
The code is yours. Continuous documentation and active knowledge transfer ensure you stay in control.
Track record
Cactos Oy
Backend Developer · 10/2025–2/2026Challenge
Automating revenue calculation and invoicing for battery energy storage systems from complex external data (eSett).
Solution
Built a robust Python data pipeline, developed Finvoice 3.0 invoice automation, and implemented required extensions to the customer portal.
Impact
Minimized manual overhead and provided real-time transparency through automated revenue reporting.
Veikkaus Oy
Software Developer · 5/2025–10/2025Challenge
Instead of individual UI elements, the goal was to create a unified, site-wide recommendation experience. My task was to ensure API performance and production readiness.
Solution
Improved model and FastAPI endpoint speed through caching (Redis) and logic optimizations. Introduced automatic type checking and improved testing practices for code quality. Also built comprehensive monitoring (Prometheus, Grafana) and configured infrastructure to auto-scale with load (GCP, Kubernetes).
Impact
A unified customer experience with significantly faster response times. A more stable codebase and reliably scaling production infrastructure.
Phaver Oy
CTO & Co-founder · 2019–2024Challenge
Building the technology for an international social media app from scratch into a scalable platform and assembling the development team.
Solution
Served as a hands-on technology leader. Managed recruitment, architecture, and best practices, while also coding numerous features in a full-stack TypeScript environment.
Impact
The technical implementation proved its worth under heavy pressure: the platform scaled to 800,000 users. Also assembled and led a 9-person multinational development team.
Veikkaus Oy
Lead Developer · 2014–2020Challenge
The machine learning team needed a scalable recommendation system and a data platform (feature store) enabling reliable model training on historical data.
Solution
Designed and built an Apache Airflow & BigQuery-based architecture. Successfully deployed a contextual bandit recommendation model to production and managed its performance.
Impact
A reliable and scalable system that remains in wide production use years later.
Technologies
Let's get started
Book a free consultation (30 min). You'll get a clear view of the next steps and whether working together is the right fit for your situation.