Songlin J - Founder at Hollow Software

Songlin J

Founder at Hollow Software

Espoo, Finland

Join Prog.AI to see contacts

Summary

🤩

Rockstar

🎓

Top School

Songlin J is a PhD researcher in AI infrastructure at Aalto University and a seasoned software engineer with seven years’ experience building cloud-native, DevOps, and RL systems. He combines academic depth in security and distributed systems (SECCLO Erasmus Mundus, DTU) with practical impact across industry and open source, contributing to high-profile projects like Arthas, Kubescape, and the Emacs Application Framework. Songlin has a track record of improving developer experience and cross-platform tooling—adding ARM64 builds, CI packaging, and user-facing features such as a multi-select plugin for Blockly that resolved a long-standing issue. He founded Hollow Software in Finland and has worked in roles spanning reinforcement learning infrastructure, prompt engineering, and HPC service development for LUMI. Comfortable across C++, Python, Java, and system tooling, he often bridges research and production by deploying LLM inference and agentic RL training stacks. An approachable mentor and prolific OSS contributor, he publishes technical write-ups and maintains an open CV and blog to share learnings.

7 years of coding experience

2 years of employment as a software developer

Exchange, Computer Science, Pass, no grade due to COVID-19, Exchange, Computer Science, Pass, no grade due to COVID-19 at University of Leeds

Bachelor of Engineering - BE, Computer Science and Technology (Specialized Class for Fundamentals and Theories), 91/100, Bachelor of Engineering - BE, Computer Science and Technology (Specialized Class for Fundamentals and Theories), 91/100 at Lanzhou University

Master of Science - MS, Security and Cloud Computing, Master of Science - MS, Security and Cloud Computing at SECCLO Master's Programme in Security and Cloud Computing (Erasmus Mundus)

Doctor of Science (Technology) - PhD, Computer Technology/Computer Systems Technology, Doctor of Science (Technology) - PhD, Computer Technology/Computer Systems Technology at Aalto University

Technical University of Denmark

Swedish

Stackoverflow

Stats

131reputation

123kreached

2answers

2questions

Github Skills (45)

ash10

debugging10

kubernetes10

debug10

jvm10

python10

bash10

cicd10

java10

pdf-viewer10

javas10

automation10

script10

agent10

build-automation10

Programming languages (25)

C#CGoHTMLJupyter NotebookTypeScriptShellLLVM

Github contributions (5)

alibaba/arthas

Jun 2020 - Aug 2020

Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

Role in this project:

Back-end Developer

Contributions:80 commits, 86 PRs, 60 comments in 2 months

Contributions summary:Songlin primarily contributed to the Alibaba Arthas project by adding new command scenarios and updating existing web pages. Their work focused on expanding the functionality of the Arthas diagnostic tool, introducing commands like `cls`, `session`, and `profiler`, and modifying the online tutorial structure. These changes involved updating the user interface, adding new options, and refining the command structure within the project's web documentation to enhance the user experience and functionality.

agentjava-agentclassloadertracerundeck

emacs-eaf/emacs-application-framework

Jun 2020 - Dec 2020

EAF, an extensible framework that revolutionizes the graphical capabilities of Emacs

Role in this project:

Full-stack Developer

Contributions:49 commits, 33 PRs, 75 comments in 5 months

Contributions summary:Songlin primarily contributes to the EAF (Emacs Application Framework) project, focusing on the PDF viewer and core browser functionalities. Their work includes excluding images in the PDF viewer's dark mode, adding English documentation for various EAF functions, and addressing typos. Furthermore, the user fixed a terminal connection error and added new features to the mindmap app, including color changes and multi-line insert nodes. The contributions suggest a focus on enhancing the functionality and user experience of the EAF project.

webviewactionscripttext-editingbrowserrss-reader

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.

Request Free Trial