10/21/2026 updated
JO
100 % available
Software developer | CRM, ERP, APIs and AI workflows
Espoo, Finland
Worldwide
About me
Software developer and founder of Kolosseum in Espoo. Available full-time for remote-first engagements through Impact Node Oy. Start dates and any onsite visits are agreed per project.
RAGTailwind CSSVitestSupabaseHTMLJavaScriptApplication Programming Interfaces (APIs)Artificial IntelligenceTest AutomationBusiness SoftwareCascading Style Sheets (CSS)Consumer Relationship SystemsData MigrationEnterprise Resource PlanningPython (Programming Language)
I build business software through Kolosseum / Impact Node Oy in Espoo, Finland, combining software architecture, full-stack development, integrations and operational workflows.
FRONTEND: TypeScript, JavaScript, React, Next.js, Vite, HTML/CSS, Tailwind CSS, shadcn/ui and Radix UI; responsive interfaces, dashboards, data tables, forms and business application UX.
BACKEND AND DATA: Node.js, Hono, REST APIs, OpenAPI, SQL, PostgreSQL, Supabase, Drizzle and Zod; data modelling, migrations, authentication, role-based access, record-level permissions, validation and audit trails.
INTEGRATIONS AND AUTOMATION: CRM/ERP workflows, Notion, APIs and webhooks, CSV/Excel imports and exports, data mapping, deduplication, retry/error handling, approval workflows, document and PDF generation, operational reporting and documented handover.
AI AND MODELS: LLM API integration, OpenAI and Anthropic APIs, model routing, tool-using agents, Model Context Protocol (MCP), retrieval-augmented generation (RAG), structured outputs, prompt engineering, evaluation and human review. Python data preparation and open-model training/evaluation workflows are part of my own ongoing development work.
CLOUD AND DELIVERY: Cloudflare Workers, Wrangler, AWS CLI, Docker-based local environments, Git, build/release workflows and CI checks. Deployment scope and operational responsibilities are agreed for each project.
QUALITY: Playwright, Vitest, unit/integration and browser testing, permission checks, regression investigation, input validation, idempotency, performance troubleshooting and maintainable documentation.
NATIVE APPLICATIONS: Swift and SwiftUI for macOS/iOS, shared application models and typed API clients.
PRODUCTION REFERENCES:
- Internal Notion CRM: over 21,000 prospect records with segmentation, qualification, source verification and contact history.
- Kolosseum Atrium: clients, contacts, assigned tasks, access policies and auditable workflow history across web and native application development.
- Joen Tikkituote Oy ERP: customers, sales follow-up, versioned offers, approvals and order workflows, with ongoing development.
I can demonstrate relevant systems with synthetic data and explain my architecture and implementation work. I also bring operations, project coordination, colleague training and business-process analysis experience. Finnish native; professional English. Scope, allocation, start date and commercial terms are agreed individually.
https://kolosseum.cc
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
FinnishNative speakerEnglishFluent