Florian Fladung

Senior Backend Developer

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Eschborn, Germany

Experience

Jul 2024 - Jun 2025
1 year

Senior Backend Developer

ING Deutschland AG

  • Database design with Oracle DB, JPA, and Flyway, considering high performance requirements
  • Analysis of multiple architecture drafts and identification of technical risks
  • Design and implementation of multiple interfaces and integrations, especially REST APIs and Kafka topics
  • Setup of Elasticsearch for monitoring and analyzing log data
  • Establishment of an iterative workflow in the project team in light of complex business requirements
Oct 2023 - Mar 2024
6 months

Senior Backend Developer

Deutsche Vermögensberatung AG

  • Developed business logic to determine risk classes and calculate investment proposals for new financial products in Spring Boot microservices, Java, and Kotlin
  • Extended digital disclosure forms according to the Securities Trading Act (WpHG) in Typescript and Java
  • Integrated micro-frontends as web components into an Angular application
  • Expanded CI/CD pipelines and performed releases using GitHub Actions in Microsoft Azure Cloud
  • Updated Docker runtimes and implemented secret management with Azure Key Vault
  • Updated an Angular application and Angular Material components, migrating the affected UI elements and styles
  • Performed database schema migrations for PostgreSQL and OracleDB using Flyway
  • Introduced agile methods such as dailies, plannings, and conducted retrospectives
May 2019 - Sep 2023
4 years 5 months

Senior Backend Developer

DER Touristik Online GmbH

  • Designed and implemented a geographic search feature using Elasticsearch, PostGIS, Google Geocoding API, and Spring Boot, optimizing keywords and result ordering
  • Designed and implemented a landing page generator for thousands of SEO-optimized subpages using Next.js, Spring Boot, PostgreSQL, and a headless CMS
  • Developed the nightly product data import as a batch job using Spring Boot, JPA, and PostgreSQL, including monitoring, log analysis, and bug fixing with Datadog
  • Optimized performance of Spring Boot applications with JPA and PostgreSQL and derived best practices
  • Defined and monitored company-wide architecture and coding guidelines for the backend
  • Defined and coordinated a cross-team test and release strategy for backend, frontend, and DevOps to enable continuous delivery and zero downtime deployments based on Docker, Kubernetes, AWS Cloud, and GitLab CI
  • Designed and coordinated an onboarding plan for external contractors and remote teams
  • Supervised bachelor's theses and coached several junior developers
  • Identified technical risks and developed strategic countermeasures in exchange with the CTO and executive management
Jul 2018 - Apr 2019
10 months

Senior Backend Developer

Valtach Mobility GmbH

  • Enhanced an authentication service based on OAuth2 and Spring Security for authenticating mobile and IoT devices as well as web users
  • Developed a service to manage vehicle fleets and multi-level role-based permissions using Spring Framework, OAuth2, and PostgreSQL
  • Adapted multiple services for parallel operation in the data center and AWS Cloud
  • Designed a solution architecture to scale the gateway service for vehicle communication using Spring Framework, Redis, and Drools Rule Engine
  • Designed a cross-team test strategy to decouple test data, stabilize, and speed up test suites with Jenkins, Docker, PostgreSQL, Liquibase, and FitNesse
Jan 2018 - Jun 2018
6 months

Senior Backend Developer

DB Systel GmbH

  • Implemented site-specific import and export interfaces in REST and XML using Spring Boot and Java 8
  • Converted internal data formats and performed data migration with XSLT scripts
  • Extended customization of CoreMedia 9 modules for specific websites
  • Adapted CMS internal and public search functions to specific data and structures using Spring Boot and Apache Solr
  • Executed and automated regression tests on large data sets
  • Coordinated test and release processes with clients
  • Conducted deployments using GitLab in Docker and AWS Cloud
Oct 2017 - Dec 2017
3 months

Senior Backend Developer

DB Systel GmbH

  • Connecting additional source systems to the crawler via web services (SOAP and REST) while considering different authorization concepts
  • Migrating the PostgreSQL database and the Solr search index to run in Docker, OpenShift, and AWS Cloud
  • Identifying and fixing security vulnerabilities in the Spring Boot backend and web frontend
Jun 2017 - Sep 2017
4 months

Senior Backend Developer

ISO Gruppe

  • Independent development and operation of the sales prototype
  • Creating the application and system architecture
Oct 2016 - May 2017
8 months

Senior Backend Developer

Deutsche Bank AG

  • Developing a REST API and business logic for calculating the pension gap using Java 8 and Spring Boot
  • Integrating a SOAP web service for concluding insurance contracts using Java 8 and Spring Boot
  • Creating an application architecture to scale development from one to five Scrum teams
  • Conducting code reviews and providing guidance in backend, frontend, and release management
Jan 2016 - Sep 2016
9 months

Senior Backend Developer

Commerzbank AG

  • Developing JSF PrimeFaces interfaces for managing and executing test cases
  • Adapting the application to work with both Java EE/WebSphere and Spring Boot/Tomcat
  • Developing various connectors configurable via the web interface (SOAP, REST, XML, JSON, CSV, and others) using Apache Camel
  • Developing an export function to download test cases and reports from the Oracle database via JPA in CSV format
Aug 2014 - Dec 2015
1 year 5 months

Senior Backend Developer

Bosch Software Innovations

  • Designing and managing requirements for an application to control and monitor software updates of IoT telematics units
  • Implementing a state machine for server-side tracking of IoT devices using Spring Boot, Oracle DB, and Angular
  • Creating automated acceptance and integration tests with Robot Framework and CI pipelines with Jenkins
  • Designing an event-sourcing architecture based on Vert.x and ActiveMQ
  • Identifying and migrating existing business logic from Inubit BPMN into Spring Boot microservices

Summary

Senior Software Developer and Solution Architect with over 10 years of experience in Java/Spring Boot, microservices, web development and cloud technologies. Extensive hands-on experience with agile methods as well as team leadership and strategic architecture planning.

Skills

Software Development, Software Architecture, Agile Methods

  • Spring Boot
  • Microservices
  • Continuous Integration/delivery (Ci/cd)
  • Kotlin
  • E-commerce
  • Java
  • Search Engines
  • Postgresql
  • Monitoring/observability
  • Test Automation
  • Elasticsearch
  • Domain Driven Design (Tdd)
  • Rabbitmq
  • Cloud Platforms (Aws, Azure)
  • Rest Api
  • Angular
  • Containerization (Docker)
  • Typescript
  • Zero Downtime Deployment

Leadership & Strategy

  • Team Leadership & Mentoring
  • Architecture Planning
  • Project Planning And Goal Setting

Languages

German
Native
English
Advanced

Education

Sep 2011 - Jun 2014

Fachhochschule Frankfurt

Bachelor of Science · Computer Science · Frankfurt, Germany

Oct 2003 - Jun 2009

Goethe Universität Frankfurt

Intermediate Diploma · Physics · Frankfurt, Germany

Certifications & licenses

Certified Scrum Master

Scrum Alliance

Istqb Certified Tester Foundation Level

ISQI GmbH

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