About Me

With over 23 years of experience in software development, I bring deep expertise in full-stack web architecture, cloud infrastructure, and AI integration to every project.

I work as a full-time developer by day, maintaining strict NDA and confidentiality agreements. Available evenings and weekends for select non-competing projects that align with my expertise.

My approach combines rapid prototyping with AI-assisted development to deliver custom solutions that scale with your business needs.

Why Work With Me

  • AI-accelerated development cycles
  • Proven track record with startups
  • Flexible, project-based pricing
  • Full-stack expertise from concept to deployment
  • ️24-hour response time commitment

Skills & Technology Stack

Comprehensive technology expertise across programming languages, cloud platforms, and specialized domains.

Programming Languages

C# Go TypeScript JavaScript ECMAScript C++ C Python PHP Lua

Cloud & DevOps

Azure AWS GCP Terraform Docker LXC Nix Bash

Security & Networking

PKI TLS VPN PKCS#11 x509 SNMP SSH WireGuard

AI & LLM

OpenAI BitNet

Web Technologies

ReactJS AngularJS Blazor WASM WebSockets WebRTC VNC webview

System Administration

Linux Debian Ubuntu NixOS systemd Prometheus Git GitHub

Core Competencies

Full-stack web architecture
Cloud & DevOps (Azure, AWS, GCP, Terraform, Docker, LXC, Nix)
Secure systems design (PKI, TLS, VPN, application security)

Advanced Technologies

AI & LLM integration (OpenAI, BitNet)
Databases & data modelling
Real-time communication (WebSockets, WebRTC)

Services

Tailored solutions designed to accelerate your business growth and digital transformation.

Custom Web Apps

Automate and scale your business with tailor-made software.

Rapid MVP Prototyping

Launch your idea in weeks with lean, AI-driven sprints.

Technical Consulting

Architecture reviews, code audits and mentoring that unblock teams.

AI Integration

Add practical AI features to cut costs and boost user value.

Project-based pricing

From €1000 and up per project + VAT

How I Work

Every project adapts to your needs.

1

Consultation

Free email or phone discovery to understand your needs.

2

Proposal & Roadmap

Tasks outlined in GitHub issues with clear milestones.

3

AI-assisted Sprints

Build the minimal viable product rapidly with AI tools.

4

Delivery & Support

Deploy, hand-over, and optional maintenance support.

Employment History

Professional experience spanning software development, system architecture, and IT consulting across multiple industries.

Current

Software Developer

Kamux Oyj

Online websites, apps, and back-end systems

C# .NET JavaScript TypeScript NodeJS Azure

Software Developer

Heusala Group Oy

Rewriting a locally executable Microsoft BitNet large-language model from C++ to Go

Go C++ AI/LLM BitNet

Software Architect

Hangover Games

Web-game and server development

Go TypeScript NodeJS ReactJS GCP Terraform

Recent (≤3 years)

Software Developer

Heusala Group Oy

Pilotic.io — modular issue-management platform built in C# / Blazor WebAssembly (no JS/TS); integrates with GitHub APIs and OpenAI for AI-assisted issue creation & planning

C# .NET Blazor WASM OpenAI GitHub

Software Architect

Hyperify.io (open-source)

Cryptographic libraries & solutions (Go + TypeScript) including a web-based SoftHSM with PKCS#11 and browser-configured end-to-end mTLS

Go PKCS#11 TypeScript WebAssembly TLS VPN

Software Architect

ICT manufacturer

IT-management solution over SNMP/SSH with high-security encryption

TypeScript NodeJS SNMP SSH Linux Nix

Earlier

Frontend Developer

Multinational phone manufacturer

ReactJS front-end architecture

ReactJS TypeScript JavaScript Azure Pipelines Docker GCP

Frontend Developer

Multinational security company

Large-scale AngularJS field-operations system

AngularJS JavaScript/ES6 Webpack NodeJS Jenkins Docker

Software Developer

Multinational security ICT company

Electronic licence-key implementation for a VPN product

C C++ CMake SSL Linux IoT

Software Developer / IT Administrator

Personal and in-house projects

Selected highlights including: web interfaces for virtual-server management, language-learning platform, construction-planning tool, ticket-tracking portal, electronic cash-register solution, portable measuring-equipment software, and more.

PHP MySQL NodeJS AngularJS Python C++

Learning & Development

Self-directed learning and continuous skill development in software development and IT.

Self-Directed Learning

Continuous Education

Self-taught developer with extensive hands-on experience in software development, system administration, and IT infrastructure. Continuously learning and staying current with industry best practices and emerging technologies through practical projects and real-world applications.

Projects & Publications

A selection of my recent non-confidential projects and open-source contributions.

Pilotic.io

Modular issue-management platform built with C# and Blazor WebAssembly, featuring AI-assisted issue creation and planning.

Visit Project →

Hyperify.io

Open-source cryptographic libraries and solutions including web-based SoftHSM with PKCS#11 and browser-configured mTLS.

View on GitHub →

Hangover Games

Game development studio specializing in interactive entertainment and VR experiences with modern web technologies.

Visit Project →

BitNet Implementation

Rewriting Microsoft's BitNet large-language model from C++ to Go for improved performance and maintainability.

View on GitHub →

Find more of my work and contributions on:

View GitHub Profile

Get in Touch

Available evenings and weekends; I reply within 24 h.

Connect With Me

Quick Contact

For business opportunities, LinkedIn is preferred for fastest response.

LinkedIn jhh@hg.fi +358 45 1734604