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I'm a Senior Full-Stack Developer with 21+ years of experience building production-grade backend systems, ERP integrations, APIs, and AI-powered data tools. I specialize in PHP and Laravel and enjoy designing scalable data models and reliable integrations that help businesses run smoothly. I'm comfortable working as an independent contractor across Europe and North America, coordinating across time zones to keep projects moving. I thrive at turning business needs into solid software — from ERP data pipelines to AI forecasting, prompt engineering, and API integrations. I'm self-directed, comfortable collaborating with non-technical stakeholders, and focused on delivering maintainable code, clear handoffs, and long-term value for clients.…I'm a Senior Full-Stack Developer with 21+ years of experience building production-grade backend systems, ERP integrations, APIs, and AI-powered data tools. I specialize in PHP and Laravel and enjoy designing scalable data models and reliable integrations that help businesses run smoothly. I'm comfortable working as an independent contractor across Europe and North America, coordinating across time zones to keep projects moving. I thrive at turning business needs into solid software — from ERP data pipelines to AI forecasting, prompt engineering, and API integrations. I'm self-directed, comfortable collaborating with non-technical stakeholders, and focused on delivering maintainable code, clear handoffs, and long-term value for clients.

Janne Keiski

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm a Senior Full-Stack Developer with 21+ years of experience building production-grade backend systems, ERP integrations, APIs, and AI-powered data tools. I specialize in PHP and Laravel and enjoy designing scalable data models and reliable integrations that help businesses run smoothly. I'm comfortable working as an independent contractor across Europe and North America, coordinating across time zones to keep projects moving. I thrive at turning business needs into solid software — from ERP data pipelines to AI forecasting, prompt engineering, and API integrations. I'm self-directed, comfortable collaborating with non-technical stakeholders, and focused on delivering maintainable code, clear handoffs, and long-term value for clients.…I'm a Senior Full-Stack Developer with 21+ years of experience building production-grade backend systems, ERP integrations, APIs, and AI-powered data tools. I specialize in PHP and Laravel and enjoy designing scalable data models and reliable integrations that help businesses run smoothly. I'm comfortable working as an independent contractor across Europe and North America, coordinating across time zones to keep projects moving. I thrive at turning business needs into solid software — from ERP data pipelines to AI forecasting, prompt engineering, and API integrations. I'm self-directed, comfortable collaborating with non-technical stakeholders, and focused on delivering maintainable code, clear handoffs, and long-term value for clients.

Available to hire

I’m a Senior Full-Stack Developer with 21+ years of experience building production-grade backend systems, ERP integrations, APIs, and AI-powered data tools. I specialize in PHP and Laravel and enjoy designing scalable data models and reliable integrations that help businesses run smoothly. I’m comfortable working as an independent contractor across Europe and North America, coordinating across time zones to keep projects moving.

I thrive at turning business needs into solid software — from ERP data pipelines to AI forecasting, prompt engineering, and API integrations. I’m self-directed, comfortable collaborating with non-technical stakeholders, and focused on delivering maintainable code, clear handoffs, and long-term value for clients.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Finnish

Fluent

Work Experience

Senior Developer at SCM Best Oy (Wisestein)

November 1, 2022 - Present

Develop and maintain production backend systems supporting supply chain and ERP workflows. Design REST APIs and data integration layers connecting ERP data sources with reporting and analytics tools. Build AI-driven forecasting features on top of ERP data to support inventory and demand planning. Participate in architecture decisions, code reviews, and quality standards across a distributed development team.

Senior Developer at Soittolinja Oy

May 1, 2022 - September 30, 2022

Delivered focused backend development on a short-term engagement, contributing to ongoing product development.

Lead Developer at Mediapool Finland (Alfons Digital)

May 1, 2020 - April 30, 2022

Led backend and full-stack development for an online education platform, including PHP/Laravel-based applications, Vue.js frontend, and custom server infrastructure. Mentored developers, conducted code reviews, and established engineering practices around testing and version control. Architected scalable backend solutions for media and content-heavy projects.

Founder & Independent Contractor at J. Keiski Oy

April 1, 2019 - Present

Deliver custom backend and full-stack development projects for clients, ranging from API and integration work to complete custom ERP solutions. Recent focus: private online communities, online education platforms, and self-hosted AI workflow automation. Operate as a fully autonomous remote contractor—scoping, estimating, delivering, and supporting projects end-to-end.

CTO & Partner at Ihmeneloset Oy

January 1, 2016 - August 31, 2019

Co-founded and led the technical direction of a small studio building custom web and software products for clients. Owned full technical stack decisions, hiring, architecture, and delivery for client engagements.

Founder / Full-Stack Developer at Newave Designs & Newave Consulting

July 1, 2004 - December 31, 2018

Delivered 14+ years of full-stack contracting work across many industries: custom websites, internal business tools, e-commerce platforms, and bespoke backend systems. Worked autonomously with direct client relationships, from scoping through deployment and long-term maintenance. Built foundational expertise in PHP, MySQL, and full-stack web development.