Hi, I’m Luca. I’m 26, originally from Heidelberg (Germany) and currently based in sunny Barcelona (Spain). I’m a freelance Software Engineer and IT Consultant focused on building modern web applications end to end, including internal tools and CRM-style platforms. I cover the full development cycle from architecture and planning to implementation and deployment. On the frontend I work with React and Next.js, and on the backend with Node.js/Express and PHP, including clean API integrations and solid database design. I’m comfortable working with dedicated server setups using Docker and structured deployment workflows, as well as scalable platforms such as Firebase or Supabase, depending on project requirements. I also build automations to reduce manual effort and have experience implementing AI-powered systems, including RAG-based solutions that go beyond simple chatbot use cases. My background in system integration and business informatics helps me bridge technical and business requirements and deliver pragmatic, reliable solutions. I’m currently available and can start immediately. I’d be happy to support your team and discuss the scope and next steps…

Luca-Samuel Pleßing

Hi, I’m Luca. I’m 26, originally from Heidelberg (Germany) and currently based in sunny Barcelona (Spain). I’m a freelance Software Engineer and IT Consultant focused on building modern web applications end to end, including internal tools and CRM-style platforms. I cover the full development cycle from architecture and planning to implementation and deployment. On the frontend I work with React and Next.js, and on the backend with Node.js/Express and PHP, including clean API integrations and solid database design. I’m comfortable working with dedicated server setups using Docker and structured deployment workflows, as well as scalable platforms such as Firebase or Supabase, depending on project requirements. I also build automations to reduce manual effort and have experience implementing AI-powered systems, including RAG-based solutions that go beyond simple chatbot use cases. My background in system integration and business informatics helps me bridge technical and business requirements and deliver pragmatic, reliable solutions. I’m currently available and can start immediately. I’d be happy to support your team and discuss the scope and next steps…

Available to hire

Hi, I’m Luca. I’m 26, originally from Heidelberg (Germany) and currently based in sunny Barcelona (Spain). I’m a freelance Software Engineer and IT Consultant focused on building modern web applications end to end, including internal tools and CRM-style platforms.

I cover the full development cycle from architecture and planning to implementation and deployment. On the frontend I work with React and Next.js, and on the backend with Node.js/Express and PHP, including clean API integrations and solid database design. I’m comfortable working with dedicated server setups using Docker and structured deployment workflows, as well as scalable platforms such as Firebase or Supabase, depending on project requirements.

I also build automations to reduce manual effort and have experience implementing AI-powered systems, including RAG-based solutions that go beyond simple chatbot use cases. My background in system integration and business informatics helps me bridge technical and business requirements and deliver pragmatic, reliable solutions.

I’m currently available and can start immediately. I’d be happy to support your team and discuss the scope and next steps

See more

Skills

Experience Level

Docker
Expert
Node.js
Expert
React JS
Expert
PostgreSQL
Expert
Express
Expert
n8n
Expert

Language

German
Fluent
English
Fluent
Spanish; Castilian
Beginner

Work Experience

Software Engineer and Consultant at Freelancing
February 1, 2022 - Present
Freelance Software Engineer and IT Consultant working on modern web applications and internal platforms end to end. My work includes architecture, development, deployment, and ongoing support of scalable systems. Development of web applications and internal tools (e.g. CRM systems) Frontend development with React and Next.js Backend development with Node.js/Express and PHP API design, integrations, and database modeling Deployment and infrastructure using Docker and dedicated servers Automation of business processes and integration of AI-based solutions (e.g. RAG systems) Technical consulting and close collaboration with stakeholders
Corporate Study (Business Informatics) at cbs Corporate Business Solutions GmbH
October 3, 2022 - September 30, 2025
Dual study program in Business Informatics combining academic studies with hands-on work in consulting and software-related projects. Application of theoretical knowledge in real client and consulting projects Support of software-driven business processes and IT solutions Collaboration with consultants, developers, and project teams Gaining experience at the intersection of technology, business, and consulting Focus on structured problem solving and practical implementation
IT Administrator at Max Planck Institute for Nuclear Physics
August 2, 2021 - September 30, 2022
IT Administrator in a research environment with responsibility for reliable system operations and technical support. Administration of workstations and servers User support for researchers and staff Setup, maintenance, and monitoring of IT infrastructure Troubleshooting hardware, software, and network-related issues Support of scientific and internal software systems
IT Administrator at Stadtwerke Heidelberg GmbH
September 3, 2018 - July 31, 2021
Worked as an IT Administrator in an enterprise environment with a strong focus on system stability, user support, and infrastructure operations. Administration and maintenance of Windows-based systems and networks User support and troubleshooting (1st and 2nd level) Setup and maintenance of servers, clients, and internal tools Documentation of IT processes and system configurations Support of internal applications and basic scripting/automation

Education

Bachelor of Science – Business Informatics at Corporate University Mannheim (Duale Hochschule)
October 3, 2022 - September 30, 2025
Dual study program in Business Informatics with a strong focus on the theoretical foundations of computer science, software engineering, and business processes, combined with practical application in corporate environments. Computer science fundamentals, software engineering, and system architecture Databases, algorithms, and IT systems design Business processes, IT consulting, and project management Applying theory to real-world scenarios through practice-oriented coursework Strong focus on analytical thinking and structured problem solving
Vocational Training – IT Specialist for System Integration (Fachinformatiker für Systemintegration) at IHK Rhein-Neckar
September 3, 2018 - July 30, 2021
Completed vocational training with a focus on IT infrastructure, system administration, and practical problem solving in enterprise environments. Planning, setup, and maintenance of IT systems and networks Administration of servers, workstations, and user environments Troubleshooting hardware, software, and network issues Supporting users and ensuring stable system operations Building a strong practical foundation for later software engineering and consulting work

Qualifications

ITIL 3 Foundation
November 1, 2021 - November 3, 2025
6th November 2025

Industry Experience

Software & Internet, Computers & Electronics, Other
    paper Peaches – Digital Platform for Health & Lifecycle Content

    Peaches is a comprehensive digital platform focused on structured health-related and lifecycle-based content. The platform combines content management, user flows, online courses, and interactive modules into a scalable system designed for long-term growth.

    I led the technical development from architecture to production, working closely with stakeholders to translate business requirements into a maintainable and extensible software solution.

    Full-stack development of web applications and internal tools

    Architecture and implementation of content and course management systems

    API development and system integrations

    Database modeling for complex relational data

    Deployment, monitoring, and continuous improvement

    Support, bug fixing, and iterative feature enhancements

    paper Immobot

    Immobot is a custom-built real estate automation platform designed to streamline and automate property searches across multiple portals. The system allows users to define detailed search profiles, processes large amounts of listing data, and delivers filtered, relevant results automatically.

    I was responsible for the full technical implementation, including system architecture, backend development, and data processing workflows.

    Design and development of a scalable backend architecture

    Implementation of APIs and data processing pipelines

    Database design and optimization for large datasets

    Automation of recurring search and notification processes

    Deployment and infrastructure setup

Hire a Full Stack Developer

We have the best full stack developer experts on Twine. Hire a full stack developer in Barcelona today.