Mechiel Lukkien
Software Engineer (full-stack, Go, Web) at mjl r&d
Amsterdam, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolMechiel Lukkien is a seasoned full‑stack software engineer based in Amsterdam with 19 years of experience building Go-backed web systems and self-hosted infrastructure. He runs mjl r&d and works freelance, combining hands-on backend development with integration work across distributed systems and authentication protocols. His open-source contributions include enhancing a modern secure mail server (adding SCRAM‑SHA‑256 and CRAM‑MD5 support) and integrating Kafka and AWS SNS into the ChirpStack LoRaWAN application server, reflecting a focus on reliability, interoperability and security. Mechiel has held technical and leadership roles from senior backend engineer to co‑founder and director, showing both product-minded engineering and operational ownership. He holds a Master’s in Computer Science from the University of Twente and prefers low‑maintenance, secure solutions that simplify long‑term operations. An understated detail: beyond feature work he frequently fixes subtle startup and configuration bugs that improve real-world robustness.
19 years of coding experience
9 years of employment as a software developer
Masters, Computer Science, Masters, Computer Science at University of TwenteHigh School, VWO, High School, VWO at Johannes Calvijn Lyceum/Ichthus College Kampen
English, Dutch
Github Skills (21)
application-server10
integrate10
back-end-development10
imap10
lorawan10
amazon-sns10
authentication10
user-authentication10
kafka10
smtp10
smtps10
integrations10
security10
smtpd10
go10
Programming languages (11)
Github contributions (5)
mjl-/mox
Jan 2023 - Mar 2023
modern full-featured open source secure mail server for low-maintenance self-hosted email
Role in this project:
Back-end Developer
Back-end DeveloperContributions:14 releases, 24 reviews, 135 commits in 1 month
Contributions summary:Mechiel primarily contributed to the back-end functionality of a mail server. Their work involved fixing bugs related to file path handling for go module proxies and addressing issues in the update check process, ensuring proper functionality at startup. The user also implemented the addition of SCRAM-SHA-256 authentication for SMTP, enhancing security, and added support for CRAM-MD5, which improves compatibility. Additionally, they have improved various parts of the code and also provided minor fixes.
e-mailmailserver
brocaar/chirpstack-application-server
Apr 2020 - Jul 2021
ChirpStack Application Server is an open-source LoRaWAN application-server.
Role in this project:Back-end Developer & Integration Engineer
Back-end Developer & Integration EngineerContributions:1 review, 6 commits, 5 PRs in 1 year 3 months
Contributions summary:Mechiel contributed to the ChirpStack Application Server by implementing and integrating various backend functionalities. They added an AWS SNS integration with error checking and a complete Kafka integration, including configuration and testing. The user also made changes to the OpenID Connect integration, improving claims handling and updating the registration callback URL mechanism. Additionally, the user updated configuration files, specifically for integration parameters like Kafka brokers and the registration callback URL.
application-serverlorawanchirpstackloraiot
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