Available to hire
I’m Sean Roennau-Wergen, a frontend developer with 3 years of experience, focused on building accessible and high-performing digital products. I specialize in React and UI integration, bringing pedagogical clarity, attention to detail, and a strong sense of structure to every project.
I’m passionate about user-centered interfaces, collaborating in agile, cross-functional teams, and delivering scalable, maintainable code with a focus on accessibility.
Skills
Language
English
Fluent
French
Fluent
German
Fluent
Work Experience
Front End Developer / Web Integrator at Abeille Assurances
September 1, 2025 - September 1, 2025Developed responsive interfaces using HTML, CSS, JavaScript and Angular, ensuring performance and cross‑platform consistency. Contributed to the evolution of internal design systems by creating reusable components for a consistent user experience. Translated UX/UI mockups into scalable, maintainable code in close collaboration with designers and stakeholders. Managed CI/CD pipelines with Jenkins to ensure smooth and reliable deployments across environments. Optimized user journeys through A/B testing, working closely with UX teams to define test variants and analyze performance data. Actively participated in Agile/Scrum rituals with a focus on continuous improvement and code quality.
English Teacher (TOEIC) at SUPMECA
December 31, 2021 - December 31, 2021Delivered English language instruction with a focus on general and business English and TOEIC exam preparation. Developed lesson materials and assessments to track learner progress and outcomes.
Business English Trainer at Elysées Langues
December 31, 2023 - December 31, 2023Provided business English training to professionals, designed curricula, and implemented learning strategies to improve language skills and workplace communication.
German Teacher at Ecole de Saint-Charles
December 31, 2019 - December 31, 2019Taught German language to students, prepared lesson plans, and supported language activities to foster language proficiency.
English Teacher (TOEIC) at SUPMECA
January 1, 2021 - January 1, 2021Taught English language skills with a TOEIC focus, developed materials and assessments, and supported learners in improving business English competencies.
Business English Trainer at Elysées Langues
January 1, 2023 - January 1, 2023Delivered business English training for professionals, designed lesson plans, and improved learners' workplace communication in business contexts.
German Teacher at Ecole de Saint-Charles
January 1, 2019 - January 1, 2019Taught German to students, prepared lessons and assessments, and supported language proficiency development.
Education
RNCP niveau 6 – JavaScript / React Developer at OpenClassrooms
October 1, 2023 - September 1, 2025Bachelor of Arts in Modern Languages – German & Chinese at Nottingham Trent University
January 1, 2013 - January 1, 2017RNCP Level 6 – Développeur concepteur logiciel (JavaScript / React) at OpenClassrooms
October 1, 2023 - September 1, 2025Bachelor of Arts, Joint First Class Honours in Modern Languages – German & Chinese at Nottingham Trent University
January 1, 2013 - January 1, 2017FreeCodeCamp Certifications: JavaScript Algorithms and Data Structures at FreeCodeCamp
January 1, 2023 - January 1, 2023FreeCodeCamp Certifications: Responsive Web Design at FreeCodeCamp
January 1, 2022 - January 1, 2022RNCP Niveau 6 – JavaScript / React Developer at OpenClassrooms
October 1, 2023 - September 1, 2025Bachelor of Arts, Joint First Class Honours in Modern Languages – German & Chinese at Nottingham Trent University (UK)
January 1, 2013 - January 1, 2017Self-Training FreeCodeCamp JavaScript – Algorithms and Data Structures at FreeCodeCamp
January 1, 2023 - January 1, 2023Qualifications
RNCP niveau 6 – JavaScript / React Developer
October 1, 2023 - September 1, 2025RNCP Niveau 6 – JavaScript / React Developer
October 1, 2023 - September 1, 2025Industry Experience
Software & Internet, Professional Services, Education, Media & Entertainment
Skills
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