Thanos Polychronakis
Thessaloniki, Macedonia and Thrace, Greece
Summary
👤
SeniorThanos Polychronakis is a senior software engineer and tech lead with 14 years of experience building full-stack products and remote engineering teams from Thessaloniki, Greece. He specializes in Node.js, TypeScript, React and GraphQL, with deep backend experience around ORMs and distributed systems (notably contributions to Sequelize) and practical work on streaming, marketplaces and legal tech. A prolific open-source maintainer, he has published nearly 50 npm packages and contributed to widely used projects like CodeIgniter and Sequelize, demonstrating both maintenance and feature-level impact. He combines hands-on engineering with leadership roles—shaping product operations, security (ISO27001), and engineering principles adopted by teams. Equally comfortable as manager, tech lead or staff engineer, he’s known for building stack-aware diagnostics and LLM-driven code audit tooling that ties AI assistance to concrete engineering constraints. Outside of code, he’s an active community builder, founding meetups and conferences such as skgtech.io and devitconf.org.
14 years of coding experience
Stackoverflow
848reputation
119kreached
11answers
15questions
validation
top-5%
Github Skills (33)
sequel10
javascript10
validations10
formatting10
configuration-management10
validation10
php-framework10
php10
orm10
nodejs10
coding-style10
sequelizejs10
code-formatting10
mysql9
testing9
Programming languages (17)
Github contributions (5)
sequelize/sequelize
Oct 2013 - Jun 2014
Feature-rich ORM for modern Node.js and TypeScript, it supports PostgreSQL (with JSON and JSONB support), MySQL, MariaDB, SQLite, MS SQL Server, Snowflake, Oracle DB (v6), DB2 and DB2 for IBM i.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:58 commits, 6 comments in 8 months
Contributions summary:Thanos primarily contributed to the core functionality of the Sequelize ORM. Their work included implementing features like allowing functions as default values, adding test cases for these functions, and updating tests. They also addressed indentation issues and fixed a bug related to enum dropping, suggesting a focus on database interaction and query generation within the ORM. Further contributions involved refactoring validation tests to support new error patterns and fixing various validation errors.
feature-richormsql-servermicrosoft-sql-serversequelize
bcit-ci/CodeIgniter
May 2012 - May 2012
Open Source PHP Framework (originally from EllisLab)
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 commits in 17 days
Contributions summary:Thanos contributed to the CodeIgniter framework by primarily addressing configuration loading and code style consistency. They modified core files to ensure proper loading of configuration files, including environment-specific configurations. Additionally, the user made improvements to the code's formatting to align with the framework's established coding standards. Furthermore, the user updated the documentation and changelog, demonstrating a focus on improving both the functionality and clarity of the framework.
phpframeworkphp-frameworkphp7php8
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