Freelancer profile translated to English.
Back to original languageAbout Gwen
Passionate software developer for complex web applications and APIs. Expert in Ruby, Javascript, Databases (SQL and NoSQL), Elixir, DevOps, CI, CD, as well as Technical Product Management.
I offer active support in all phases of software development, from requirements analysis, software architecture/design, UI/UX, to implementation, refactoring, and operations. I coach teams and stakeholders in Lean Management, Agile Development, and implement optimization potential of software development processes with the teams.
I support the updating of legacy software and the integration of interfaces, such as to payment gateways or public institutions.
I advise on compliance requirements and documentation for payment processes/KYC, DVGSO/GDPR, as well as in the medical technology/health sector.
Numerous projects for clients from various industries:
Sapiens • vivosensmedical GmbH • florio.com • MeAndYou.com · palabea.com · netzschaffende.de · evergreening • Landschaftsarchitekten PartG · Waldkonzepte PartG · Wella AG · Metten Stein+Design GmbH · Voelkel GmbH · Novartis Pharma GmbH · beckers bester GmbH · tesa AG
German
Native or bilingual
English
Fluent
Spanish
Basic
Hindi
Basic
Can work on-site
Leipzig (up to 50km), Berlin (up to 100km), München (up to 100km), Hamburg (up to 100km), Frankfurt am Main (up to 100km)
Experience
- SAPIENSSenior Ruby on Rails DeveloperBANKING AND INSURANCEAugust 2024 - June 2025 (10 months)Hamburg, GermanyFurther development of a Ruby-on-Rails application for the Kassenärztliche Vereinigung Hamburg for billing verification according to §106d SGB V.- Improvement of the local development environment in Docker- Optimization of the CI pipeline in Gitlab- Optimization of the development process and team collaboration- New and further development of significant features in Ruby on Rails with Trailblazer, Sidekiq, PDF generation via Grover- Implementation of a complex set of rules defined in Excel for the creation of booking instructions- Numerous improvements to code quality- Query optimizations for MS SQL Server- Ruby-on-Rails upgrade to 7.x and 8.x- Support of project management, especially in backlog maintenanceKanban process with retrospectives
- VivoSensMedicalSenior Ruby on Rails Developer, ConsultantMEDICALNovember 2022 - Today (3 years and 9 months)Leipzig, GermanyConception and implementation of fundamental system upgrades of legacy software (mobile REST APIs in node.js, web apps in Ruby on Rails and Sinatra) from 2014/15 to modern technologies. Consulting on compliance and DevOps.- Update of Linux, Ruby, Rails, nodeJS, MongoDB and various libraries- Adaptation of code and tooling for development, build and deployment- Introduction of a container-based CI/CD workflow with Github Actions and Hashicorp Nomad and Consul on VMware
- florio GmbHSenior Ruby on Rails / Fullstack Developer, Team LeadMEDICALJune 2021 - May 2022 (1 year)München, GermanyDevelopment of a new web app for doctors to record treatment data of hemophilia patients, and to report it to the German Hemophilia Registry (DHR). Connection to an internal JSON API and to the DHR SOAP API.- Technical leadership of 4-6 developers- Design of the architecture- Design and implementation of the data model- Extensive support in conception and UX- Development of critical components, e.g., SOAP API client with 2FA via IMAP
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Certifications
- HeartSellerDenys Scharnweber Academy2022