Tero Parviainen
Co-Founder at Counterpoint
Helsinki, Finland
Summary
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SeniorTero Parviainen is a Helsinki-based software leader and co-founder with 12 years of hands-on experience building full-stack web applications and early-stage products. He blends product-minded CTO experience with daily coding, having led architecture and teams at Eficode, Deveo, and creative.ai before founding Counterpoint. Technically versatile, Tero has contributed to high-profile open-source work in AngularJS and implemented core Redux server logic that demonstrates strong grasp of immutable state and real-time integrations. He excels at bridging customer conversations and technical execution, equally comfortable in sales meetings, cohort analysis, and shipping production code. Colleagues would describe him as a pragmatic problem-solver who turns complex requirements into maintainable systems while retaining a developer’s curiosity.
12 years of coding experience
14 years of employment as a software developer
English, Finnish
Github Skills (18)
javascript10
immutablejs10
redux10
front-end-development10
angularjs10
server-side10
socket-io9
nodejs9
socket-io-client9
socket9
uitest8
html8
mochajs8
chai8
fullstack-development8
Programming languages (10)
Github contributions (5)
teropa/redux-voting-server
Aug 2015 - Feb 2016
Server app for the Full-Stack Redux Tutorial
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:26 commits, 2 PRs, 3 pushes in 5 months
Contributions summary:Tero implemented core application logic for a Redux-based voting server, focusing on immutable data structures and state management principles. They developed functionalities including setting entries, progressing to the next voting round, handling votes, and determining the winner. Furthermore, the user integrated the Redux store with a socket.io server for real-time state broadcasting and action handling, as well as included the ability to reset the state.
full-stackredux
angular/angular.js
Apr 2014 - May 2015
AngularJS - HTML enhanced for web apps!
Role in this project:Front-end Developer
Front-end DeveloperContributions:10 commits, 2 PRs, 10 comments in 1 year 2 months
Contributions summary:Tero primarily contributed to bug fixes and enhancements within the AngularJS codebase. Their commits addressed issues related to parsing expressions, including correcting how unary minus expressions are handled to improve performance. They also worked on stabilizing one-time literal expressions and improving the documentation around the ngRepeat directive, focusing on how it handles tracking and duplicates.
angularjs
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