Hannes Junnila
Co-Founder at Renow
Helsinki, Finland
Summary
🤩
Rockstar🎓
Top SchoolHannes Junnila is a Helsinki-based co-founder and software professional with 12 years of experience blending technical delivery, product consulting, and business leadership. He co-founded Renow after running his own consultancy and partnering in a renovation-focused venture, bringing practical startup and client-facing experience to technical projects. As a back-end developer on the widely used OpenTripPlanner open-source project, he contributed to core routing logic and data model improvements—work that required deep system architecture understanding and attention to time-zone and travel-time correctness. His background spans consultancy and people-leadership roles at Netlight and operational experience from the Finnish Defence Forces, giving him a disciplined, cross-functional approach to problem solving. Trained in Industrial Engineering and Management at KTH, he combines engineering rigor with commercial sense to deliver dependable systems. An eclectic mix of public transport routing contributions and hands-on startup building suggests he thrives at the intersection of infrastructure software and real-world services.
11 years of coding experience
2 years of employment as a software developer
Master of Science (MS) Industrial Engineering and Management, Master of Science (MS) Industrial Engineering and Management at KTH Royal Institute of TechnologyBjörneborgs Svenska Samskola
Finnish, Swedish, English
Github Skills (10)
algorithm10
data-structures10
javas10
algorithms10
routing-slip10
routes10
data-structure10
java10
apidoc9
api9
Programming languages (15)
Github contributions (5)
opentripplanner/OpenTripPlanner
Jun 2014 - Jan 2023
An open source multi-modal trip planner
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1849 reviews, 2227 commits, 581 PRs in 8 years 8 months
Contributions summary:Hannes primarily worked on developing back-end features, particularly related to the core routing logic of the OpenTripPlanner project. Their contributions involved modifying and expanding the handling of trip patterns and their corresponding data structures, including the introduction of new data classes such as `PathwayMode` and the integration of time zones. Furthermore, they focused on fixing code related to the processing of travel times. This work required an understanding of the project's architecture.
multi-sourcemulti-modaltrip-plannermodalplanner
HSLdevcom/digitransit-deploy
Mar 2015 - Jun 2016
Contributions:124 commits, 43 PRs, 87 pushes in 1 year 2 months
deploymentdigitransit
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