Recommended expert

Robert (Dipl. inform.) Malec

Backend Developer

Robert Malec
Darmstadt, Germany

Experience

Mar 2025 - Present
11 months

Backend Developer

Payment Backend

  • Integration of partner systems in the payment and credit card environment.
  • Development, deployment and monitoring in a large system landscape.
  • Use of a variety of client-specific frameworks and tools.
Jan 2024 - Dec 2025
2 years

Architect, Backend Developer

Cashback App

  • Technical design and implementation of an MVP: an app for cashback payments for relevant activities on Instagram.
  • Monitoring of activities, billing companies and influencers based on their reach.
Jan 2022 - Dec 2025
4 years

PO, Architect, Developer

Algotrading Engine

  • Design and implementation of a platform for algo trading based on futures.
  • Integration for execution on multiple crypto exchanges and TradingView for chart analysis.
  • Active automated money management.
Sep 2018 - Sep 2019
1 year 1 month

Business Analyst, Coach

Advertising Token

  • Design of a business model linked to the issuance of a proprietary cryptocurrency.
  • Drafting a migration strategy from PayPal to a hybrid of utility and security tokens.
  • Collaboration in creating tokenomics and a whitepaper.
May 2018 - Sep 2023
5 years 5 months

CTO, Architect, Team Lead, Business Analyst, Developer

Tokenisation Platform

  • Design, architecture and technical leadership of multiple portals for tokenizing assets using blockchain technology.
  • Implementation of legal regulations as rule stacks in a rule engine.
  • Designing BPMN workflows and running them on the Camunda workflow engine.
  • Defining use cases and creating them as BPMN processes with corresponding test coverage.
  • Integrating external services like custodian service, KYC and AML.
  • Porting to a white-label solution and covering interfaces with REST.
Jun 2015 - Mar 2019
3 years 10 months

Developer, Architect, Team Lead

Lending Platform

  • Further development of a portal for loan application, verification, approval, and credit and risk monitoring.
  • Launch in the US market.
  • Design and implementation of a framework to make the GUI dynamic using metadata (interpreter).
  • Led an international team responsible for frontend development and third-level support.
Mar 2015 - Jun 2015
4 months

Developer

SLA-Monitoring

  • Further development of a portal to visualize analysis data from monitored application and server infrastructures.
  • GWT GUI for displaying Flash-based charts and user management.
Aug 2013 - May 2014
10 months

Designer, Developer

Invoice-EDI

  • Modernization and refactoring of the EDI platform for invoice data, including the proprietary RuleEngine.
  • Adaptation of the solution for new customers and countries and its deployment.
  • Introduction of test coverage.
Apr 2013 - Jul 2013
4 months

Developer

Building Savings Calculator

  • Migration of a Struts-based building savings calculator to plain GWT.
  • Integration of MVP and editor framework, as well as mailings and PDF generation.
Sep 2012 - Feb 2013
6 months

Developer

Energy Quantity Management

  • Further implementation of a portal for energy volume management.
  • GUI for breaking down into supply components, aggregating and defining tranches, and placing orders with suppliers.
  • BPMN workflows to implement the business processes.
Jan 2011 - Jul 2012
1 year 7 months

Architect, Designer, Developer, Coach

NOTAM/Briefing-Office

  • New implementation of a portal to manage TAM messages (NOTAM, SNOWTAM, ASHTAM).
  • GUI-based creation and sending of NOTAMs via AFTN and EAD interfaces and mapping to AIXM data.
  • Development of the Briefing-Office for generating and managing PIBs.
  • Development of the test framework.
May 2009 - Jan 2011
1 year 9 months

Developer

SLA-Monitoring

  • New implementation of a portal for visualizing evaluation data from monitored application and server infrastructures.
  • GWT GUI for displaying Flash-based charts and user management.
  • Implementation of a caching mechanism using an embedded database and scheduling.
  • Setup and maintenance of the development and deployment infrastructure.
Feb 2008 - Mar 2009
1 year 2 months

Architect, Designer, Developer, Coach

Auditverwaltung

  • Extension of an audit capture and management system.
  • Concept, implementation, and coaching of team members.
  • Operational maintenance and migration.
Aug 2007 - Feb 2008
7 months

Designer, Developer

Kreditkartenbestellsystem

  • Enhancement of a credit card management system for the launch of a new product (prepaid credit card).
  • Workflow and backend development plus integration with partner systems.
May 2007 - Jul 2007
3 months

Designer, Developer

OSS-Provisionierungssystems

  • Design (Redesign) and implementation of an OSS provisioning system.
  • Frontend development and backend update.
Nov 2006 - May 2007
7 months

Designer, Developer

Business component of a mail repository

  • Design and implementation of the business layer of a mail repository for an internet communications provider as a Java API.
  • Design and implementation of a library for the frontend and IO integration with ICE servers.
Sep 2005 - Oct 2006
1 year 2 months

Architect, Designer, Developer

Claims processing system for a claims adjuster

  • Design and implementation of the orchestration of a claims processing system.
  • Feasibility study as a BPM project based on SOA.
May 2004 - Jul 2005
1 year 3 months

Architect, Designer, Developer

Management tool for editorial documents

  • Design and implementation of a tool for automated processing and management of video recordings and editorial documents.
  • Implementation of the DOM structure and GUI design.
May 2003 - Oct 2003
6 months

Designer, Developer

Data viewer for market research results

  • Design and implementation of a web-based data viewer for market research results.
  • Design and implementation of the middleware and the web frontend.
Dec 2002 - Apr 2003
5 months

Developer

Supplier evaluation system for the automotive industry

  • Implementation of database import processes, thread handling for complex server processes, and a client GUI.
  • Implementation based on already developed frameworks.
May 2002 - Sep 2002
5 months

Designer, Developer

Survey and Analysis System for Market Data of the Electrical Industry

  • Concept and implementation of a web-based survey and analysis system.
  • Design and implementation of the EJB architecture.
Jun 2000 - Jul 2001
1 year 2 months

Designer, Developer

Claims Processing System for the Insurance Industry

  • Concept and implementation of a web-based claims processing system.
  • Development of a custom persistence, business, and servlet layer on Apache/Tomcat.
  • Integration and connection to various partner systems.
Jan 2000 - Apr 2000
4 months

Coach, Project Manager

Delivery System for Market Research Results

  • Concept and implementation of a web-based delivery system for market research results in the pharmaceutical industry.
  • Training of the development team.
Jan 1999 - Jun 1999
6 months

Project Manager, Designer, Developer

Expansion of an Editorial Environment

  • Implementation of a web-based editorial environment with consistency checking.
  • Integration into existing document management systems and web servers with a custom servlet engine.
Jun 1998 - Dec 1998
7 months

Designer, Developer

Data Collection and Management System for Deployment Data

  • Implementation of a client-server system for capturing and maintaining employee deployment data.
Feb 1998 - Jun 1998
5 months

Project Lead, Designer, Developer

Document Capture and Delivery System

  • Concept and implementation of a web-based order interface for delivering administrative documents.
  • Management of data for data centers and participating facilities.
  • Development of a server.
Oct 1997 - Dec 1997
3 months

Developer

Online Shop

  • Implementation of an order system for metal industry products.

Skills

Industry Experience

  • Finance/banks
  • Air Traffic Control
  • Automotive
  • Internet/isp
  • Telecommunications
  • Retail
  • Energy Industry

Programming Languages

  • Java
  • Python
  • Bpmn
  • Sql
  • Pl/sql, Solidity, Javascript, Typescript, C, C#, C++ …

Application Areas

  • Data Maintenance Systems, Editorial Systems, Order Systems, Srm, Audit Management, Credit Management, Edi, Communication Systems, Tokenization Platforms, Custody Solutions, Asset Management, Blockchain Integration, Smart Contracts, Trading Engines

Tools

  • Figma, Miro, Confluence, Jira, Trello, Asana
  • Ci/cd: Github, Gitlab, Visual Source Safe (Microsoft), Cvs, Svn, Clearcase, Continuus, Maven, Aws, Jenkins, Docker, Docker Compose
  • Development Environment: Eclipse, Remix, Visual Studio Code, Oracle Bpel Designer, Wsad, Activiti, Camunda Modeler, Together/j, Rational Rose, Enterprise Architect, Magic Draw
  • Databases: Informix, Oracle, Mysql, Mariadb, Sybase, Postgresql, Db2, H2
  • Tomcat, Bea Weblogic, Websphere, Jboss, Springboot, Flask
  • Frameworks: Axis, Cxf, Struts, Jsp, Jsf, Log4j, Cocoon, Ant, Maven, Junit, Selenium, Common.controls, Gwt, Gxt, Hibernate, Spring, Springboot, Kafka, Mybatis
  • Drools, Camunda Bpm
  • Toad, Oracle Bpel Designer, Oracle Developer, Tora, Pgadmin, Openlayers, Squirrel, Dbeaver

Languages

German
Advanced
English
Advanced
Polish
Advanced
Russian
Advanced

Education

Oct 1988 - Jun 1997

University of Karlsruhe (KIT)

Diploma in Computer Science · Computer Science · Karlsruhe, Germany

Lorem ipsum dolor sit amet

German high school diploma (Abitur) · Germany

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Hüseyin Korkut
Hüseyin Korkut

Senior Full-Stack Engineer

View Profile
Danylo Koval
Danylo Koval

Anti-Sybil / Fraud Detection Analyst

View Profile
Arne Hendricks
Arne Hendricks

Embedded Fullstack Developer

View Profile
Marcel Meyer
Marcel Meyer

Cloud-Architect, Senior Solution Architect, Senior Software-Engineer

View Profile
Matthias Metzlaff
Matthias Metzlaff

Project Manager

View Profile
Ilayda Dede
Ilayda Dede

Cybersecurity & Ethical Hacking Program

View Profile
Matthias Isler
Matthias Isler

Fractional CTO (Principal Engineer / Technical Architect)

View Profile
Ivaylo Sieme
Ivaylo Sieme

Cloud Architect & AI Engineer

View Profile
Gavrilo Olah
Gavrilo Olah

Head of Software Development

View Profile
Natascha Kluike
Natascha Kluike

Business Analyst DORA and System Architecture

View Profile
Selvaraj Kannaiyan
Selvaraj Kannaiyan

Senior Full Stack & Cloud Architect

View Profile
Tim Rüther
Tim Rüther

Consultant and Fullstack Developer

View Profile
Marijn Scholtens
Marijn Scholtens

Senior Software Engineer

View Profile
Maciej Sawicki
Maciej Sawicki

Product Owner

View Profile
Emre Ates
Emre Ates

Development of a software solution for archiving and a GenAI-based Q&A tool

View Profile
Shamaila Mahmood
Shamaila Mahmood

Senior Software Architect

View Profile
Stefan Baust
Stefan Baust

Senior Full Stack Developer / Co-Founder / CTO / Head of Development

View Profile
Dariusz Kaczmarkiewicz
Dariusz Kaczmarkiewicz

Business System Analyst

View Profile
Peter Achilles
Peter Achilles

IT Consultant

View Profile
Thomas Jarnot
Thomas Jarnot

Backend Developer, DevOps Engineer

View Profile
Jens Fischer
Jens Fischer

Strategic Business Consultant

View Profile
Ronald Foerster
Ronald Foerster

IT Consultant & Continuing Education

View Profile
Thomas Übermeier
Thomas Übermeier

Head of Engineering - Midnight

View Profile
Tymofii Sukhachov
Tymofii Sukhachov

Senior Java Developer / Architect

View Profile
Oliver Bodemer
Oliver Bodemer

Senior Software Architect

View Profile
Leif Stolberg
Leif Stolberg

Software Architect

View Profile
Marc Haid
Marc Haid

Senior Architect, Coach and Developer

View Profile
Vitalijs Visnevskis
Vitalijs Visnevskis

Mentor

View Profile
Bastian Isensee
Bastian Isensee

Senior Backend Engineer Go & Technical Consultant

View Profile
Ilker Baltaci
Ilker Baltaci

Freelance Mobile Developer

View Profile