drinking coffee

> hello world_

I'm Alex S. (oppahansi). A software developer specializing in robust Java systems, Spring Boot microservices, and cross-platform applications with Dart & Flutter. Based in Germany. Welcome to my digital workspace.

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/ Journey & Experience

2020 — Present

Software Developer

Object Systems GmbH

Apr 2025 — Dec 2025

Finanz Informatik (External Developer)

Middleware / APL Framework

Backend development for the middleware layer. Key responsibilities include extending and maintaining the middleware & APL framework, extending APL validation and caching, requirement analysis, documentation, implementating StackTraceShortener, and OpenAPI integration.

Java 17/21 Spring Boot / Microservices OpenAPI

Sep 2023 — Mar 2025

Finanz Informatik (External Developer)

OSPlus BI Project

External backend developer at Finanz Informatik. Developed a new internal OSPlus project, an EmailService integrating with internal notification platforms, a consolidated permission system, and a module for recurring data queries with multi-format export capabilities (PDF, Excel, Avro, CSV).

Java 17/21 Spring Boot / REST SQL / DB2 / HSQL Apache Avro

2016 — 2017

Working Student

AMANA consulting

Systematic development of a Groovy-based automated web testing suite to improve QA procedures.

2014 — 2016

Working Student in Software Development

Mindcurv

Provided application support, lifecycle maintenance, and structured bug fixing for the Nikon Online Store.

/ Technical Skills

local_cafe Java

eco Spring Boot

code Dart

devices Flutter

database PostgreSQL

layers Docker

/ Random samples of my work

Randomly selected repositories.

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Get in touch

I'm always open to new opportunities and collaborations if it is interesting.

bash — contact.sh

Feel free to reach out via your preferred platform below. Let's make something amazing together!

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