2022 - 2024: DApp Registration Architecture

Role: Technical lead, Tech Lead Achievements

Customer: Input Output (IOHK)

Tasks:

Career Progression: Started as Developer, promoted to Tech Lead managing a 13-person cross-functional team developing Daedalus and Lace crypto wallets serving 1M+ active users.

• DApp Registration Architecture:
  • Designed and implemented on-chain DApp registration system using CIP-72 standard on Cardano network with DNS validation
• Blockchain Integration:
  • Built real-time backend services monitoring Cardano blockchain for new DApp registrations and transaction processing
• AI-Powered Content Moderation:
  • Implemented local LLM system using Ollama API for automated DApp content moderation, filtering inappropriate content (adult content, illegal activities, drugs)
• Production Releases:
  • Managed complete release lifecycle from development to production deployment
• Team Leadership:
  • Conducted weekly 1:1s, career growth mentoring, performance reviews, code reviews, and architectural design sessions across the team

Skills:

React, TypeScript, Electron.js, Cardano, Plutus, CIP standards, Node.js, Ollama/LLM, Nix/NixOS, CIP-72 DApp Registration Tool

2021 - 2022: Platform Support

Role: Developer Contributions, Technical lead

Customer: Input Output (IOHK)

Tasks:

• Platform Support:
  • Implemented aarch64-darwin (Apple Silicon M1/M2) support for Daedalus wallet
• Hardware Wallet Integration:
  • Built support for hardware wallet connectivity and transaction signing
• Feature Development:
  • Delivered multiple PRs across both Lace and Daedalus wallets
• Code Contributions:
  • Lace PRs | Daedalus PRs

Skills:

React, TypeScript, Electron.js, Cardano, Plutus, CIP standards, Node.js, Ollama/LLM, Nix/NixOS, CIP-72 DApp Registration Tool

2019 - 2020: Developed and maintained 'OnSite by HConnect'

Role: Senior Mobile Developer (Freelancer)

Customer: HeidelbergCement

Tasks:

Developed and maintained 'OnSite by HConnect' - a React-Native mobile application for concrete delivery management and construction site operations.

• Built cross-platform mobile app serving construction industry professionals
• Implemented real-time concrete delivery tracking and quality management features
• Integrated Firebase for real-time notifications and data synchronization
• Deployed to production on both app stores with positive user feedback

Skills:

React-Native, Redux Thunk, TypeScript, React Query, Firebase Configuration

2017 - 2018: e-Learning platform

Role: Full stack lead developer (Freelancer)

Customer: NEL.ACADEMY

Tasks:

• In a skilled team of four software developers and quality testers, I took on the strategic role of Software Architect. My main responsibility was the construction of an advanced e-Learning platform that facilitates dynamic interaction and promotes language learning among educators and students.
• Simultaneously, I assumed the leadership position of Scrum Master, conducting the majority of Scrum ceremonies to ensure adherence to Agile principles, and drive the team towards optimum productivity.
• The technology suite employed for this project included:
  • Backend development using MeteorJS, MongoDB, and AWS Lambda functions.
  • Frontend development employing MeteorJS and ReactJS.
  • Mobile application development using ReactNative/Redux.
  • For continuous integration and deployment, we utilized Bitbucket-Pipelines.

2015 - 2016: Mobile Developement

Role: Senior Mobile Developer (Freelancer)

Customer: User Interface Design GmbH

Tasks:

• In a role as a frontend developer, I contributed to the advancement of an integral component of Mercedes-Benz vehicles ? the Head-Unit. This system, often likened to the 'brain' of the infotainment setup in the vehicle, manages a variety of functions, ranging from navigation to media playback, connecting to smartphones, and even handling handsfree calls.
• My responsibility was to develop a bespoke module for this Head-Unit, using ECMA 5/6 and vanilla JavaScript. The process involved the use of a custom-designed JavaScript framework, akin to AngularJS in functionality, which operated in a data-driven manner reminiscent of a content management system.

Skills:

JavaScript, AngularJS

2014 - 2015: Creation of cloud-based software for life-cycle assessments

Role: Full-stack Developer (Freelancer)

Customer: Thinkstep

Tasks:

• In a dynamic and critical capacity as an IT Consultant, I specialized in the creation of cloud-based software for life-cycle assessments (LCA).
• As a UI Developer, my primary role involved the development of single-page applications utilizing AngularJS and Bower modules, coupled with writing BDD-style unit tests using Grunt/Karma that were integrated into Jenkins - an open-source automation tool used for continuous integration and continuous delivery of software projects.
• In addition to this, I held the role of a Scrum Master for a six-member team, guiding them through the Scrum framework. I also contributed as a Backend Developer, working on the development and maintenance of a Java Spring MVC based RESTful API service.

Skills:

Spring Framework, JavaScript, AngularJS, Java

2014 - 2014: Development of an e-commerce portal

Role: Adobe CQ5 Consultant (Freelancer)

Customer: Conrad Electronic SE

Tasks:

• My responsibilities included collaborating with the official Adobe team in the development of an e-commerce portal for 'Conrad Electronic SE.'
• As part of the project, I engaged in the development of new functionalities utilizing CQ5 OSGi-Bundles and oversaw the migration of an antiquated CMS into Adobe CQ5. Additionally, I was involved in creating templates for the portal.
• Another critical aspect of my role included integrating the webshop with SAP to ensure seamless data interchange. On the user interface side, I leveraged my skills with the ExtJS-Sencha-Javascript framework for development.

Skills:

Ext JS, Adobe Experience Manager (AEM), JavaScript, CQ5, Java

2013 - 2014: Development and design of a Lawsuit Case Management system

Role: Entrepreneur

Customer: on request

Tasks:

• In my role, I was instrumental in the development and design of a Lawsuit Case Management system, specifically crafted to assist law firms with real-time updates on lawsuit status from the court.
• The system was optimally designed for mobile devices using jQuery Mobile for seamless user interaction. The system's backend, which functioned as a REST API in synchronization with the court, was built leveraging robust technologies such as Hibernate, Spring-Core, Spring-Security, and Spring-MVC.

Skills:

Spring MVC, Hibernate, jQuery Mobile, Spring Framework

2011 - 2012: Design and implementation of templates for the after-sales portal

Role: CQ4 content management developer (Freelancer)

Customer: Mercedes-Benz Group

Tasks:

• In my role as a CQ4 Developer, I was engaged in the design and implementation of templates for the after-sales portal of Mercedes Benz. Additionally, I was tasked with creating migration scripts to transition data and templates from an antiquated CMS system to the CQ4 platform.
• As a Technical Tester, I innovatively created a custom test framework anchored on a Maven Plugin. This was utilized for automated testing of the Vehicle-Suite Module for the mercedes-benz website.
• The test framework employed advanced patterns such as Page-Object and Facade to ensure effective and thorough testing.

Skills:

Maven,Java

2006 - 2010: various Projects

Role: Multiple roles (Employee)

Customer: various

Tasks:

• Alfresco Software Engineer:
  • Spearheaded the development of new change requests for an existing Alfresco system at BAUER AG.
  • Facilitated the integration of OpenCMS with Alfresco, ensuring synchronization of content across both platforms.
  • Managed the migration of various Alfresco systems and their integration with standard authentication mechanisms (AD, LDAP, Novel iChain).

• Alfresco Service Support Engineer:
  • Played a pivotal role in the third-level support team, contributing to problem resolution and developing workaround strategies.
  • Coordinated the deployment and testing phases, created test cases, and managed communications with Alfresco Tech Support.
• Technical Project Manager:
  • Acted as the primary liaison for the client, BAUER, while also working as a developer.
  • Provided technical consultation to the client regarding their online presence, created effort estimates and quotes, and handled monthly billing procedures.
• CMS Software Developer:
  • Responsible for the conceptualization, implementation, and development of change requests and bug-fixing procedures.
  • Conducted training sessions for customers and provided coaching to select employees in the area of OpenCMS.
• Quality Assurance and C++ Software Developer:
  • Developed a comprehensive test framework in MS Visual Studio C++, including a detailed test protocol.
  • Utilized technologies such as xerces-c (XMLParser), Wininetd (Network Communication), and Web Services with SOAP.

Skills:

SOAP, C++, OpenCMS, Alfresco Web Services Description Language (WSDL), Java

further projects on request