Immo Heikkinen
Software Engineer at Previse
Helsinki, Finland
Summary
🤩
Rockstar🎓
Top SchoolImmo Heikkinen is a seasoned software engineer based in Helsinki with 12 years of experience building reliable backend systems for both startups and large enterprises. He has a strong Clojure pedigree alongside production experience in Java, Python, and cloud-native tooling (Kubernetes, AWS, Snowflake), and currently works on AI-driven B2B payment infrastructure at Previse. At Zalando and Pitch he led backend teams, owned 24/7 services, and shipped integrations like a Slack app that tightened collaboration workflows. His open-source contributions to the Korma SQL library show a focus on maintainability and subtle correctness improvements (one-to-one foreign key handling and release/process docs). Comfortable across data platforms (Postgres, DynamoDB, Snowflake) and streaming systems (Kafka, Airflow), he combines deep systems thinking with pragmatic engineering. A math-and-computer-science MSc from University of Helsinki, he often bridges architecture, on-call reliability, and developer productivity in distributed systems.
12 years of coding experience
14 years of employment as a software developer
Master of Science Mathematics Computer Science, Master of Science Mathematics Computer Science at University of Helsinki
Stackoverflow
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Github Skills (6)
clojure10
lib10
clojure-cli10
sql9
database-design8
testing7
Programming languages (4)
Github contributions (5)
korma/Korma
Dec 2013 - Feb 2018
Tasty SQL for Clojure.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:142 commits, 45 PRs, 65 pushes in 4 years 3 months
Contributions summary:Immo contributed to the core logic of the Korma SQL library for Clojure. Their work involved removing unused bindings, renaming functions, and adding features related to one-to-one foreign keys for dry run results. Furthermore, they ensured unique keys were handled and made updates to the release process and documentation. These changes indicate a focus on refining the library's functionality and maintainability.
tastysqlednclojuresql-query
immoh/nsorg-cli
Mar 2019 - Nov 2022
Organize ns form using Clojure CLI
Contributions:2 releases, 9 commits, 2 PRs in 3 years 8 months
code-styleorganizeclojure-cliclojurecli
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