Henrik Johansson
Staff Backend Engineer at LeoVegas Group
Greater Stockholm Metropolitan Area Sweden
Summary
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RockstarHenrik Johansson is a Staff Backend Engineer based in Greater Stockholm with 16 years building resilient, distributed systems and backend platforms. He has deep hands-on experience with Go and large-scale databases, contributing performance and correctness improvements to high-profile open-source projects like the GoCQL driver for Apache Cassandra and the gocqlx query/ORM library. His career spans roles from software architect at Zettle by PayPal to engineering at ScyllaDB, where he worked on both operator and client-side concerns, blending backend engineering with DevOps pragmatism. Henrik is skilled at making complex storage and paging semantics reliable (e.g., token-aware batching and paging fixes) and practical for local development and production. He also balances full-stack instincts—having modernized UI components in SoapUI—with low-level protocol and marshalling work, a combination that helps bridge product and infrastructure needs. Colleagues would describe him as a thoughtful engineer who prefers robust, testable fixes over flashy rewrites.
15 years of coding experience
23 years of employment as a software developer
Github Skills (30)
kubernetes10
query-builder10
cassandra10
databases10
kubernetes-operator10
scylla10
java10
javas10
go10
orm10
kubernetes-pods10
cql10
cassandra-database10
database10
operator10
Programming languages (12)
Github contributions (5)
scylladb/scylla-operator
Sep 2019 - Jul 2020
The Kubernetes Operator for ScyllaDB
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:7 releases, 103 commits, 75 PRs in 10 months
Contributions summary:Henrik primarily contributed to the ScyllaDB operator by enhancing deployment configurations. They implemented a default `IfNotPresent` image pull policy to simplify local development, and also introduced consistent logging using `github.com/scylladb/go-log`, along with context propagation. Additionally, they made minor stylistic adjustments and worked on configuring parameters. The user also implemented the ability to customize the scylla config map and cassandra-rackdc-properties.
k8s-operatoroperatorscylladbk8skubernetes
scylladb/gocqlx
Jun 2018 - Nov 2019
All-In-One: CQL query builder, ORM and migration tool
Role in this project:Back-end Developer
Back-end DeveloperContributions:3 releases, 10 commits, 8 PRs in 1 year 5 months
Contributions summary:Henrik primarily contributed to the `gocqlx` library, focusing on enhancing the query builder and ORM functionalities. Their work includes implementing JSON support for both insert and select queries, adding support for tuple columns in various query types, and updating dependencies. The user also addressed the paging iteration functionality and improved its correctness.
ormgocqlmigration-tooldatabasepostgresql
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