Jani Eväkallio
Founding Engineer at Marker
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJani Eväkallio is a founding engineer and engineering leader with 13 years of experience building product-led companies and developer-focused tooling from London. He combines hands-on full-stack and mobile engineering—shipping React, React Native, Node.js and backend work—with product and people leadership, having scaled teams and run a profitable EU consulting office as VP Engineering. Jani has repeatedly founded and shaped early-stage products, most recently building a word processor at Marker after roles at scroll.ai, verb.ai and as a consultant helping startups go to market. He is an active open-source contributor with notable work on the widely used Knex query builder (adding reusable query composition), redux-offline and React Native auth tooling, reflecting a pragmatic focus on modular, testable systems. Known for coaching teams and high retention, he blends technical depth with a human-first approach to engineering culture and delivery. His background in comparative literature hints at an unusual cross-disciplinary curiosity that informs clear product thinking and documentation.
13 years of coding experience
22 years of employment as a software developer
Comparative literature linguistics, Comparative literature linguistics at University of Helsinki
English, Finnish
Stackoverflow
35,640reputation
2.3mreached
486answers
15questions
react-native
top-1%
animation
top-5%
model-view-controller
top-5%
vba
top-5%
android
top-5%
jquery
top-5%
Github Skills (66)
offline-js10
knx10
javas10
backbonejs10
appauth10
ios-simulator10
markdown10
javascript10
keyboard10
front-end-development10
sql10
knexjs10
offline-mode10
java10
offline-browsing10
Programming languages (11)
Github contributions (5)
futurice/pepperoni-app-kit
Apr 2016 - Jan 2017
Pepperoni - React Native App Starter Kit for Android and iOS
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:87 commits, 47 PRs, 110 pushes in 9 months
Contributions summary:Jani primarily contributed to the iOS side of the React Native application. Their work included modifying the `AppDelegate.m` file, which is a key entry point for iOS applications. They also made changes to the iOS testing configuration, specifically in the `KindlingTests.m` file. These modifications suggest a focus on integrating and configuring the application for the iOS platform and ensuring its functionality.
reactjestreact-nativenative-appfuturice
foambubble/foam
Jun 2020 - Sep 2020
A personal knowledge management and sharing system for VSCode
Role in this project:Front-end Developer
Front-end DeveloperContributions:3 releases, 51 reviews, 250 commits in 2 months
Contributions summary:Jani primarily contributed to the user interface aspects of the "foam" knowledge management system. Their work focused on enhancing the appearance and functionality of the Markdown editor, implementing features like accessible links and GitHub integration. They also addressed layout and display issues, specifically within the home and page layouts, ensuring a better user experience. These changes demonstrate a focus on refining the front-end presentation and usability of the application.
personal-knowledge-basenote-takingpkmknowledgevscode
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.