Available to hire
Hi, I am Konrad. A freelance Java Backend Engineer with over five years of experience building and modernizing backend systems for clients across Europe and the US. Through my company, Snappy Pebble LLC, I provide remote development services focused on Spring Boot, RESTful APIs, microservices, CI/CD pipelines, and cloud integration (AWS, Docker, Kubernetes).
I’ve supported organizations in digital transformation, automation, and system optimization, from scalable API architectures to end-to-end feature delivery. My core expertise is in the Java/Spring ecosystem. Having worked with Angular, Thymeleaf, and Next.js in the frontend.
I value clear communication, clean architecture, and pragmatic solutions that deliver measurable results. Available for remote freelance projects, contract work, and technical collaborations.
Skills
Language
German
Fluent
English
Fluent
Spanish; Castilian
Beginner
Latin
Intermediate
Work Experience
Freelance Software Developer at Snappy Pebble LLC (Own Company)
January 1, 2025 - PresentDesigning and maintaining microservices using Java, Kotlin, Spring Boot, Next.js, and SQL. Implementing cloud solutions with Kubernetes and AWS. Optimizing deployment and monitoring processes. Conducting code reviews and ensuring quality of software in various projects including client projects for Advasco GmbH / Deutz AG.
Software Developer at JustRelate Group
December 31, 2025 - September 4, 2025Developed software features focused on customer relation management and database maintenance, contributing to enhancing product capability and user satisfaction.
Software Developer at Novomind AG
September 30, 2021 - September 4, 2025Developed software features related to product information management systems and performed ongoing database maintenance.
Wissenschaftliche Hilfskraft (Scientific Assistant) at Universität zu Köln
October 31, 2019 - September 4, 2025Developed Virtual Reality applications and plugins, contributing to innovative academic projects related to VR technologies.
Intern at Accenture GmbH
March 31, 2010 - September 4, 2025Assisted with SQL queries, system administration, and translation reviews at the Wolfsburg office.
Freelance Software Developer at Snappy Pebble LLC (Own Company)
January 1, 2025 - PresentDesign and maintenance of microservices using Java, Kotlin, Spring Boot, Next.js, and SQL. Implementation of cloud solutions with Kubernetes and AWS. Optimization of deployment and monitoring processes, conducting code reviews and ensuring code quality. Client project with Advasco GmbH: developed and maintained microservices for Deutz AG focusing on performance, deployment automation, and maintainability.
Software Developer at JustRelate Group
December 31, 2025 - September 4, 2025Development of software features for Customer Relation Management and database maintenance.
Software Developer at Novomind AG
September 30, 2021 - September 4, 2025Development of software features for Product Information Management and database maintenance.
Wissenschaftliche Hilfskraft (Research Assistant) at Universität zu Köln
October 31, 2019 - September 4, 2025Development of Virtual-Reality applications and plugins.
Intern at Accenture GmbH
March 31, 2010 - September 4, 2025Worked on SQL queries, database administration, and translation reviews in Wolfsburg.
Freelance Software Developer at Snappy Pebble LLC (Own Company)
January 1, 2025 - PresentFull-stack development of scalable web applications and microservices using Java, Kotlin, Spring Boot, Next.js, and SQL. Designed and maintained cloud-native architectures with Kubernetes and AWS to ensure high availability and performance. Optimized CI/CD pipelines, deployment automation, and monitoring to improve release speed and system reliability. Conducted code reviews, refactoring, and QA, introducing best practices for maintainable and efficient codebases. Supported clients end-to-end from technical design decisions to deployment and long-term maintenance.
Fullstack Developer at Advasco GmbH (Client Project under Snappy Pebble LLC)
January 1, 2025 - PresentDesigned and maintained microservices for a large-scale enterprise system in the automotive sector. Optimized application performance and database queries, reducing response times for core services. Implemented CI/CD pipelines with Kubernetes and AWS, enabling automated, reliable deployments. Improved system reliability and maintainability through refactoring, monitoring, and code quality practices. Collaborated with cross-functional teams to ensure scalable architecture and long-term sustainability.
Software Developer at JustRelate Group
December 1, 2025 - October 22, 2025Developed and enhanced features for a large-scale Customer Relationship Management (CRM) platform. Implemented backend logic and database maintenance routines, ensuring data integrity and high availability. Collaborated closely with product teams to translate business requirements into robust technical solutions. Contributed to long-term platform stability by refactoring legacy code and introducing modern best practices. Supported deployment processes and provided ongoing technical support for CRM enhancements.
Software Developer at Novomind AG
September 30, 2021 - October 22, 2025Developed and extended features for a Product Information Management (PIM) system, focusing on performance and scalability. Maintained and optimized database structures to support large-scale product catalogs and complex data relationships. Collaborated in an agile team (Scrum) to design, implement, and test new product features. Ensured clean code and maintainable architecture through code reviews and refactoring.
Wissenschaftliche Hilfskraft at Universität zu Köln
October 1, 2019 - October 22, 2025Designed and developed Virtual Reality applications and plugins for educational and research use cases. Built interactive VR features to enhance user experience and engagement. Worked closely with academic staff to transform research requirements into technical solutions.
Freelance Software Developer at Snappy Pebble LLC
January 1, 2025 - PresentFullstack development of scalable web applications and microservices with Java, Kotlin, Spring Boot, Next.js, and SQL. Designed, built, and maintained cloud-native architectures with Kubernetes and AWS, ensuring high availability and performance. Optimized CI/CD pipelines, deployment automation, and monitoring to improve release speed and system reliability. Performed code reviews, refactoring, and quality assurance, introducing best practices for maintainable and efficient codebases. Supported clients end-to-end, from technical design and architecture decisions to deployment and long-term maintenance.
Fullstack Developer at Advasco GmbH
January 1, 2025 - PresentDesigned and maintained microservices for a large-scale enterprise system in the automotive sector. Optimized application performance and database queries, reducing response times for core services. Implemented CI/CD pipelines with Kubernetes and AWS, enabling automated, reliable deployments. Improved system reliability and maintainability through refactoring, monitoring, and code quality practices. Collaborated with cross-functional teams to ensure scalable architecture and long-term sustainability.
Self-Publishing Project Author at Self-Publishing (Book: Satori – A Journey to Inner Mastery)
April 1, 2025 - October 22, 2025Planned, wrote, and published a non-fiction book alongside software development. Utilized Amazon Kindle Direct Publishing (KDP) for publishing. Development and execution of marketing strategies (social media management, website development).
Software Developer at JustRelate Group
December 1, 2025 - October 22, 2025Developed and enhanced features for a large-scale CRM platform. Implemented backend logic and database maintenance routines, ensuring data integrity and high availability. Collaborated closely with product teams to translate business requirements into robust technical solutions. Refactored legacy code and introduced modern best practices. Supported deployment processes and provided ongoing technical support for CRM enhancements.
Software Developer at Novomind AG
September 1, 2021 - October 22, 2025Developed and extended features for a Product Information Management (PIM) system, focusing on performance and scalability. Maintained and optimized database structures to support large-scale product catalogs and complex data relationships. Collaborated in an agile team (Scrum) to design, implement, and test new product features. Ensured clean code and maintainable architecture through code reviews and refactoring.
Wissenschaftliche Hilfskraft at Universität zu Köln
October 1, 2019 - October 22, 2025Designed and developed Virtual Reality applications and plugins for educational and research use cases. Built interactive VR features to enhance user experience and engagement. Worked closely with academic staff to transform research requirements into technical solutions.
Education
Business Mathematics at University of Cologne
October 1, 2010 - September 30, 2019Physics (studies) at University of Cologne
April 1, 2010 - September 30, 2010Business Administration (studies) at Philipps-University Marburg
April 1, 2008 - April 1, 2010Abitur at Heinrich-Emanuel-Merck-School in Darmstadt
August 1, 2004 - July 31, 2007Thesis on VR-Application of the Altenberg Cathedral (1.3) at University of Cologne
October 1, 2010 - September 30, 2019Study of Physics at University of Cologne
April 1, 2010 - September 30, 2010Business administration studies at Philipps-University Marburg
April 1, 2008 - April 30, 2010Abitur at Heinrich - Emanuel - Merck - School in Darmstadt
August 1, 2004 - July 31, 2007Master's degree in Business Mathematics: Numerical Mathematics at University of Cologne
October 1, 2010 - September 1, 2019Physics at University of Cologne
April 1, 2010 - September 1, 2010Business Administration at Philipps-Universität Marburg
April 1, 2008 - April 1, 2010Abitur at Heinrich-Emanuel-Merck-Schule in Darmstadt
August 1, 2004 - July 1, 2007Business mathematics: Numerical mathematics at University of Cologne
October 1, 2010 - September 1, 2019Physics at University of Cologne
April 1, 2010 - September 1, 2010Business administration at Philipps-Universität Marburg
April 1, 2008 - April 1, 2010Abitur at Heinrich-Emanuel-Merck-School, Darmstadt
August 1, 2004 - July 1, 2007Qualifications
Industry Experience
Software & Internet, Education, Professional Services, Media & Entertainment, Computers & Electronics
Skills
Hire a Full Stack Developer
We have the best full stack developer experts on Twine. Hire a full stack developer in Hamburg today.