ollidev.com

The
engineer

you're looking for

Toggle your product on. From idea to product with AI. I design and build prototypes and turn them into launch-ready products. Fast.

Available for project

Olli Hämäläinen

Schedule Meeting

...first discussion is free

Services that I offer

I build AI-enabled products, from proof of concept to a launch-ready product. Fast, pragmatic execution.

Prototype to Product

I can help you to build real product that you can sell and test with real users. As example, you might have a rough prototype built with Lovable, AI tools e.g. OpenAI customGPT or other tools that needs to be built into a product and deployed to real environment that scales.

Outcome from the service:

Includes a launch-ready product with core features, user testing, and iteration based on early feedback. First iteration is done usually in days. Constant communication and iterations are included. Depending on needs, includes deployment to real production environment and tests for robustness.

Price:7500 €

Prototype

You have a business idea but you don't know how to build it. I can build a prototype for you so you can test it yourself or with few test users.

Outcome from the service:

Includes a functional prototype you can use and demo. Constant communication on progress and actionable next steps included. First iteration is done in day or two.

Price:3750 €

Proof of concept

You have thought about technology for your business idea but haven't tested it yet. Proof of Concept testing reveals details you never might have thought of.

Outcome from the service:

Includes one clear technical implementation that demonstrates feasibility. Example: Testing out voice based AI for your business idea.

Price:1500 €

Custom Project

You have a specific project that doesn't fit into the standard service packages. I can work on your custom requirements with flexible hourly billing.

Outcome from the service:

Includes flexible development work tailored to your specific needs. Regular progress updates and transparent time tracking. Perfect for ongoing development, maintenance, or unique requirements.

Price:100 €/h

Contact Olli for detailed quote →

What's included by default in all services

Clear Documentation

Documentation of the architecture and technical decisions made during development

Development Setup

Step-by-step instructions on how to continue developing the project locally on your machine through Cursor.

Strategic Roadmap

Opinionated, prioritized next steps with cost estimates for future development phases

Schedule Meeting

First discussion is free

orView Done Projects →

*Note: Prices are negotiated for every project and depend on the complexity and duration of the project. Please contact me for a detailed quote. VAT not included.

Experience - About Me

I'm a full-stack developer focused on AI-enabled products with nice-looking UIs. I turn ideas into working software. I also use AI tools to speed up my own development (Cursor/Claude Code), so prototypes become real MVPs quickly.

I have 10+ years across product development, software engineering, and customer-facing roles. I've built proof-of-concepts and prototypes and turned early demos into fully functional MVPs ready for real user testing.

Before freelancing, I spent nearly a decade at Smartly.io, where I led a global support team, debugged a lot of customer cases, built product features, and managed performance marketing campaigns for global advertisers. That mix of hands-on engineering and product thinking helps me scope the smallest thing that works, especially in early-stage products.

How I can help

• Design and ship AI features (agents, LLM structured outputs, RAG search, automations) that feel native to your product
• Integrate models (OpenAI, Claude, Gemini, Mistral) with solid guardrails, evals, and analytics
• Deploy prototypes/MVPs and iterate with real users to real environments (Hetzner, Render, Vercel, etc.)
• Migrate and rewrite early prototypes into next version product
• Keep costs predictable and performance reliable (prompting, caching, monitoring)

Technologies / buzzwords

React, Next.js, TypeScript, Node.js, Bun, Hono, Tailwind CSS, shadcn/ui, PostgreSQL, Python, FastAPI, Grafana, Kibana, Git/GitHub, Vercel, Render, OpenAI API, Claude Sonnet, Google Gemini, LangChain, Hetzner, Coolify Docker, and more.

Want to see some examples of my work?

View Done Projects →

Customers say:

"Olli was able to help me build a prototype further and learn in the process. That was exactly what I needed."

Mika / CEO at StratXcel.tech

"Olli's proof-of-concept for our AI report generation, including a compelling sales demo video, was key to rapidly acquiring initial test customers and validating our product direction."