Juuso Leinonen
Staff Engineer at Smartly
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolJuuso Leinonen is a Staff Engineer based in Helsinki with 11 years of experience transitioning from marketing into pragmatic, craft-focused software engineering. He thrives across the full stack but prefers backend systems, API design and integrations, and has hands-on experience expanding clients like HubSpot through API client contributions. Juuso has led engineering teams and architected service decompositions, production deployments and DevOps practices at companies such as Wunderdog and Management Events, working with Node.js, Typescript, Kubernetes, AWS and PHP ecosystems. He combines a product-minded background in marketing with deep technical execution, enabling him to translate business needs into maintainable services and observable platforms. Constantly curious, he’s currently digging into Rust in his spare time and brings a musician’s discipline for practice and iteration to engineering. That mix of cross-functional insight, open-source API work and operational experience makes him effective at both shipping features and improving long-term system health.
11 years of coding experience
13 years of employment as a software developer
High School Graduate, High School Graduate at Nurmijärven Yhteiskoulun LukioBachelor of Business Administration (BBA), Marketing, Bachelor of Business Administration (BBA), Marketing at Haaga-Helia University of Applied Sciences
English, Finnish, Swedish, German
Github Skills (6)
api-rest10
php10
api10
apidoc10
api-client10
unit-testing9
Programming languages (5)
Github contributions (5)
HubSpot/hubspot-php
Nov 2015 - Nov 2015
HubSpot PHP API Client
Role in this project:
Back-end Developer & API Developer
Back-end Developer & API DeveloperContributions:6 commits, 4 PRs, 1 comment in 1 day
Contributions summary:Juuso primarily contributed to the development of the HubSpot PHP API Client. Their work focused on implementing and extending the API functionality, evidenced by the addition of new endpoints for companies, including create, update, delete, and retrieval methods. They also added support for associated contacts and retrieving data related to companies through various endpoints. These changes indicate a focus on expanding the capabilities and features of the API client.
hubspotphp-apiphpapi-wrapperapi-rest
lordthorzonus/homelab-provisioning
Mar 2022 - Feb 2023
Playbooks for provisioning my home network
Contributions:69 commits, 533 PRs, 679 pushes in 11 months
provisioning
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