$ man anton – Anton Österberg

whoami

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+------------------------------------------------------------+

I am software developer who loves writing code that is resilient, maintainable and extendable.

In my free time I like to go for long rides on my bicycle, build keyboards, play chess, and read books. And drink coffee. Mostly the coffee thing actually.

I am based in Malmö, Sweden.

history

Nexure / Electrolux

2020 – Current

Back end senior software engineer at Nexure, a subsidiary of Electrolux which provides payment solutions and internal tools for support and sales agents in several countries in Europe and North America.

A substantial part of the work I have done has been focused on making our payment system more robust, in order to enable the company's transformation into a provider of subscription services, with an increased volume of recurring payments.

Designed and built a new payment service from the first commit - Ktor-based, multi-module Gradle project with PostgreSQL/Ktorm, coroutines, and Sentry integration
Implemented dynamic region switching with our payment provider, using circuit breakers to get automatic failover between regions
Built a distributed scheduling and webhook delivery service with database-backed distributed locking and namespace-based isolation
Expanded payment method support across multiple global markets with Apple Pay, SEPA, PayPal, Swish, iDEAL, Bancontact, and more
Authored a production Rust feature flag HTTP service (Axum) with Redis backend
Created tooling for more efficient merchant account configuration with our payment service provider, reducing configuration time from hours to just a few minutes
Designed and published reusable JVM libraries: a type-safe finite state machine with coroutine support and a reflection-based dependency injection container

Languages: Kotlin, Rust
Databases: PostgreSQL, MongoDB
Frameworks & Libraries: Ktor, Protobuf, Resilience4j, Jackson
Build & Deployment: CircleCI, GitHub Actions, Gradle, Kubernetes, AWS
Tools & Services: Datadog, Sentry, GitHub API, Auth0/OAuth2, Adyen, Claude Code

Zensum

2017 – 2020

Back end software developer at Zensum, a Swedish loan broker and fin-tech company.

During my time at Zensum I was working with gradually splitting up a PHP/JavaScript monolith to a micro service architecture, consisting of primarily Kotlin services. Since we were an early adopter of many new technologies such as Kafka, Ktor and Kotlin coroutines, we would at many times have to be innovative and create new tools and libraries were none was present, some that would end up being open sourced.

A lot of my work was focused on communications (email / SMS) and the insurance platform while also writing integrations towards third party APIs such as banks and other service providers. Since we used Kafka a lot for internal communication between services we were able to achieve a very resilient and performant architecture where we could easily deploy services independent of each other.

Languages: Kotlin, Python, PHP, JavaScript
Databases: Kafka, Redis, MongoDB, Firestore, MariaDB
Frameworks & Libraries: Ktor, Kotlin Coroutines, Jackson, Protobuf
Build, Deployment & Infrastructure: CircleCI, GitHub Actions, Docker, Gradle, Google Cloud Platform, Kubernetes, Heroku
Tools & Services: Sentry, Auth0/OAuth2, Twilio, Mandrill

Stockholm University

2016

Working as tutor for students in an entry level programming course (Python) at Stockholm University.

Wallenius Marine

2008 – 2014

Employed as able seaman, working on RoRo ships engaged in world wide trade.

cat ~/.education

Stockholm University

2013 – 2017

Bachelor in Computer Science at The Department of Computer and Systems Sciences (DSV). My bachelor thesis was "Identifying Duplicates in Issue Trackers for Software Development".

cat skills.txt

These reflect the technologies that I am most up to date or comfortable with, even if I have experience of other things as well.

Languages: Kotlin, Rust
Databases: PostgreSQL, Kafka, Redis, MongoDB
Operating Systems: Linux
Frameworks & Libraries: Ktor, Kotlin Coroutines, Protobuf, Serde
Build & Deployment: GitHub Actions, CircleCI, Docker, Cargo, Gradle, Nix
Tools & Services: Sentry, Adyen, Datadog, GitHub API, Auth0/OAuth2

ls ~/projects/

flagpole – Simple service for feature flagging
flakeid – Rust implementation of Flake ID
fire – A HTTP request client for the terminal
prune – Command line application to find files which takes up precious disk space
giss – Application to list GitHub issues and pull requests in the terminal

locale

English
Swedish

whoami

history

Nexure / Electrolux

Zensum

Stockholm University

Wallenius Marine

cat ~/.education

Stockholm University

cat skills.txt

ls ~/projects/

locale

./connect.sh