Jarmo Isotalo
Co-CTO at Prönö
Helsinki, Finland
Summary
🤩
Rockstar🎓
Top SchoolJarmo Isotalo is a business-minded tech leader with 13 years of experience building and scaling backend infrastructure, currently serving as Co-CTO at Token Terminal in Helsinki. He combines hands-on engineering—spanning DevOps, SRE, and full-stack work—with product and operational leadership, having progressed from engineering roles to VP of Engineering and interim CTO positions. Jarmo has driven multi-datacenter architectures, global database consolidations, and performance optimizations (including a 40x gateway improvement) at high-growth platform companies. As an active open-source contributor, he has improved robustness in Vercel’s deployment pipeline and enhanced user telemetry and UX in the Gatsby ecosystem. Colleagues rely on him for pragmatic technical direction, team scaling, and data-driven product instrumentation. He often blends creative engineering (video production and conference organization at ZEIT) with rigorous backend reliability work, a mix that helps translate technical tradeoffs into business outcomes.
13 years of coding experience
10 years of employment as a software developer
Herttoniemen lukioBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at University of Helsinki
English, Swedish, Finnish, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (30)
javascript10
docker10
deploying10
vercel10
dockers10
cicd10
error-handling10
hosting10
telemetry10
gatsby10
react10
google-analytics9
cloud-computing9
back-end-development9
command-line-interface9
Programming languages (11)
Github contributions (5)
vercel/vercel
Oct 2016 - Sep 2018
Develop. Preview. Ship.
Role in this project:
DevOps Engineer & Backend Developer
DevOps Engineer & Backend DeveloperContributions:2 releases, 37 commits, 31 PRs in 1 year 11 months
Contributions summary:Jarmo primarily contributed to the project by fixing bugs and improving the robustness of the deployment process. They addressed issues in error handling, specifically within the deployment and certificate management systems, demonstrating a focus on backend stability. Furthermore, the user demonstrated proficiency in modifying build processes, including dependency removal and build environment configuration, thus showcasing a DevOps skillset.
hostingshipcloudcommandjamstack
gatsbyjs/gatsby
Feb 2019 - Jun 2021
The best React-based framework with performance, scalability and security built in.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:68 reviews, 56 commits, 61 PRs in 2 years 4 months
Contributions summary:Jarmo primarily contributed to the `www` directory, focusing on front-end development within the Gatsby framework. Their work included adding Google Analytics tracking to website components, such as buttons and navigation elements, improving user interaction tracking. They also implemented changes to homepage and blog components, demonstrating a focus on user experience and website functionality. Furthermore, the user made changes to the telemetry system, adding features such as tracking the used package manager and the project's siteHash.
gatsbyreactweb-appfastestcompiler
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