Ing. Johannes Gnadlinger

Payments & Backend Engineer

Building reliable financial infrastructure for corporate banking — SEPA, EBICS, Java

Former Product Owner · 8+ years in banking software · Independent product builder

Linz, Österreich

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JG

Summary

Payments-focused Backend Engineer with 8+ years of experience building production software for regulated banking environments. Specialized in corporate payment systems, SEPA, EBICS and Java-based backend development, with experience taking financial products from 0 to 1.

Previously served as Product Owner in corporate banking, combining hands-on engineering with product ownership, stakeholder alignment and domain expertise. Outside my professional work, I independently design and ship software products using modern AI-assisted engineering workflows.

Professional Experience

Raiffeisen Software GmbH
Linz

2023 - Present

Payments & Backend Engineer

Developing backend systems for corporate payment and financial services in a regulated banking environment.

  • Build and evolve payment transaction functionality for corporate banking.
  • Work on the migration from the Austrian MBS communication standard to EBICS.
  • Develop Java-based backend services with a focus on correctness, reliability and maintainability.
  • Work across payment-domain requirements, implementation, testing and production operations.
  • Contribute domain expertise in payment processing, SEPA and bank-customer communication.

Raiffeisen Software GmbH
Linz

2018 - 2022

Full Stack Developer & Product Owner

Built digital banking products across private and corporate banking, progressing from hands-on full-stack development into product ownership.

  • Developed customer–advisor communication features in private banking.
  • Built corporate banking functionality for advisor and insurance interaction.
  • Served as Product Owner for corporate banking products, leading the team behind advisor–customer communication tools and owning requirements and stakeholder alignment.
  • Took functionality from concept through implementation to production.
  • Worked across Java backend and Angular frontend.

Core Expertise

Payments & Financial Systems

SEPA
EBICS
Corporate Banking
Payment Transactions

Backend Engineering

Java
Jakarta EE
Quarkus
Open Liberty
REST APIs
SQL

Platform & Operations

OpenShift
Splunk
Dynatrace
XL Release

Data

Microsoft SQL Server
MongoDB

Frontend

Angular
TypeScript
React

AI-assisted Engineering

Claude Code
GitHub Copilot
Agentic Development Workflows

Education & Qualifications

WKO Oberösterreich

2026
Engineering Qualification (Ing.) — NQF/EQF Level 6

HTL Leonding

2013 - 2017
System & Software Engineering

Selected Projects

Kaydo

Conceived, built and shipped a private social platform end to end — from product concept to a running service.

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Vite

myFAOS

Designed and shipped a mobile-first family organizer with a shared calendar, tasks and child documentation.

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Vite
Firebase

Flexpoll

Built and maintain a polling platform supporting several poll types, including location-based and live polls.

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Vite