Haikku Ilo Arosuo working at a home desk

Freelance IT Consultant in Finland

Practical software development and reliable IT systems

I help Finnish startups and growing companies build stable applications, integrate critical software tools, and resolve technical bottlenecks quickly.

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142

Projects completed across Finland

99.4%

On-time release rate

< 3h

Average first response time

Core Competencies

Direct Engineering Support Without Agency Overhead

Work directly with an independent senior engineer who takes direct accountability for every deliverable.

Clear Onboarding Discovery

We map your current architecture during a 45-minute discovery session. You receive a structured summary report with immediate priorities within 24 hours.

Custom Software Engineering

Full-stack web and backend applications built to handle real traffic spikes. Clean codebases ensure your team maintains full ownership of all assets.

GDPR and Cloud Security

Nordic compliance standards are built into every database connection and API route. Data stays encrypted at rest and during transit.

Tool and System Integration

Smooth connections link your CRM, billing engines, and internal databases. Custom API bridges remove repetitive manual data entry between platforms.

Direct Ongoing Support

Emergency debugging and routine maintenance are handled without support tickets or middle managers. You communicate directly through your preferred work channel.

Performance Optimization

Bottlenecks get diagnosed with direct system profiling. Database indexes and caching layers bring query response times down significantly.

Tiina Korhonen ★★★★★

"Haikku fixed our payment gateway webhook failures inside two days. The checkout now runs without manual checks, which saved our customer service team dozens of hours every week."

Mikko Virtanen ★★★★★

"Working directly with an engineer made our product launch smooth. Haikku delivered the backend architecture ahead of schedule and explained technical tradeoffs in plain business language."

Sari Laine ★★★★★

"Our internal warehouse tool needed a full rewrite before peak season. Haikku took full responsibility for the data migration and kept our daily operations running without downtime."

Antti Nieminen ★★★★★

"Haikku integrated our customer database with modern cloud billing. Communication was straightforward, milestones were met, and our internal team learned valuable maintenance practices."

Juha Makela ★★★★★

"When our legacy inventory database slowed down, Haikku identified the exact bottlenecks. The system now loads records in seconds, keeping our staff productive throughout the day."

Elina Heikkinen ★★★★★

"Finding a reliable freelance developer who understands business context is tough. Haikku provided thoughtful architecture recommendations that saved us substantial cloud infrastructure costs."

Supporting founders and technical teams across Finland

Pohjola Dynamics

Aura Logistics

Kallio Commerce

Suomi Healthtech

Noste Analytics

Viesti Cloud

Specializations

Full-Lifecycle IT & Development Services

Focused engineering services designed to keep your business software stable, secure, and ready to scale.

Custom Software Development

Web applications, internal portals, and custom APIs built with TypeScript, Node.js, and modern frameworks. Systems are engineered for speed, clean maintenance, and test coverage.

Core

System & API Integration

Connecting separate business tools into automated, cohesive pipelines. Custom webhooks and middleware eliminate manual copy-pasting between payment gateways, ERPs, and CRMs.

Popular

Troubleshooting & Bug Elimination

Rapid diagnostic reviews to trace database locks, API timeouts, and critical system crashes. Problems get resolved at the root cause rather than masked with temporary fixes.

Urgent

Cloud Infrastructure & DevOps

Simplifying deployment pipelines and cloud setups on European server regions. Automated tests and simple container workflows make deployments predictable and stress-free.

Infrastructure

Legacy Code Modernization

Refactoring outdated systems incrementally to avoid operational disruptions. Critical database structures and core logic are updated without needing risky ground-up rewrites.

Refactor

Architecture & Security Audits

Wide evaluations of your application's security posture, compliance, and database speed. You receive clear, actionable recommendations sorted by business priority.

Audit

FAQ

Frequently Asked Questions

Direct answers to common questions about consulting engagements, pricing, and project scope.

How do you charge for consulting and development projects?

Engagements are scoped on either a fixed milestone basis for clear deliverables or a transparent daily rate for ongoing consulting. You receive a extensive budget estimate before any work starts.

What is the typical project timeline?

Small system integrations and critical troubleshooting tasks typically wrap up within five to ten business days. Inclusive custom software builds generally run between six and twelve weeks depending on scope.

What happens if our software needs adjustments after delivery?

Every completed deliverable includes a thirty-day review period where any defects are addressed immediately at no extra charge. Long-term maintenance retainers are also available for continuous support.

How does the onboarding process work?

We begin with a short discovery conversation to review your technical challenges and existing architecture. You then receive a concrete written plan outlining milestones, technical tools, and timelines.

Why hire a freelance consultant instead of a digital agency?

You communicate directly with the engineer actually building your system, eliminating account managers and communication overhead. This direct channel keeps budgets efficient and prevents misunderstandings.

Can you work alongside our existing internal development team?

Yes, I regularly collaborate with in-house product leads and developers to accelerate specific backlog features or resolve tricky infrastructure issues. Work integrates cleanly into your existing Git workflows.