Harri Hälikkä
Software Developer at Futurice
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolHarri Hälikkä is a Helsinki-based software developer with 13 years of experience building full-stack web applications, currently focused on backend work with JavaScript across server, desktop and mobile contexts. He champions maintainable, high-quality code, web performance and usability, and brings pragmatic functional programming and agile practices to delivery. At Futurice he has shipped cross-platform web solutions and earlier worked on access control/time-tracking systems and LAMP-based sites, giving him a broad, production-minded perspective. He’s an active open-source contributor who has improved JWT authentication flows and fixed subtle query-builder edge cases in well-known projects like knex. Comfortable bridging frontend and backend concerns, he has a knack for untangling tricky state and time-related bugs that others tend to overlook.
13 years of coding experience
2 years of employment as a software developer
M.Sc., Computer Science, M.Sc., Computer Science at Teknillinen korkeakoulu-Tekniska högskolan
Finnish, English
Stackoverflow
301reputation
27kreached
12answers
0questions
Github Skills (24)
javascript10
testing10
web-token10
authentication10
user-authentication10
knx10
sql10
jsonwebtoken10
jwt10
nodejs10
knexjs10
expressjs9
sqlite8
better-sqlite38
mysql8
Programming languages (8)
Github contributions (5)
dwyl/learn-json-web-tokens
Jun 2015 - Jun 2015
:closed_lock_with_key: Learn how to use JSON Web Token (JWT) to secure your next Web App! (Tutorial/Example with Tests!!)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 2 PRs, 3 comments in 1 day
Contributions summary:Harri focused on enhancing the JWT authentication functionality within the project. They refactored code, separating the token generation from the authentication success function. Key contributions involved incorporating custom expiration times for tokens and fixing issues related to time units in expiration calculations. The user also added a test case for validating expired tokens, improving the overall robustness of the authentication flow.
securelockclosedtokenauthentication
knex/knex
Aug 2015 - Aug 2015
A query builder for PostgreSQL, MySQL, CockroachDB, SQL Server, SQLite3 and Oracle, designed to be flexible, portable, and fun to use.
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 commits, 4 PRs, 6 comments in 1 day
Contributions summary:Harri focused on enhancing the Knex.js query builder library. They implemented and tested functionality for handling edge cases in join operations, specifically when dealing with a value of 0. Furthermore, they addressed a bug related to the handling of undefined values within the compiler. In addition to bug fixes and feature testing, the user updated the library's build output and refactored the migration files with the addition of a per-migration transaction configuration.
sql-serverjavascriptsqlite3sqlitedatabase
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