Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Front-End Developer specialized in Angular, with over 8+ years of experience building critical and confidential applications. I have designed and delivered high-performance, secure interfaces by applying best practices in service-oriented architecture, automated testing, and SEO optimization. My experience spans the entire front-end ecosystem, enriched by DevOps environments, API management, and cloud technologies. As a Scrum Master, I have guided teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.…Front-End Developer specialized in Angular, with over 8+ years of experience building critical and confidential applications. I have designed and delivered high-performance, secure interfaces by applying best practices in service-oriented architecture, automated testing, and SEO optimization. My experience spans the entire front-end ecosystem, enriched by DevOps environments, API management, and cloud technologies. As a Scrum Master, I have guided teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.

Tony Sterezynski

Front-End Developer, Full Stack Developer, Web Developer, +2





Front-End Developer specialized in Angular, with over 8+ years of experience building critical and confidential applications. I have designed and delivered high-performance, secure interfaces by applying best practices in service-oriented architecture, automated testing, and SEO optimization. My experience spans the entire front-end ecosystem, enriched by DevOps environments, API management, and cloud technologies. As a Scrum Master, I have guided teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.…Front-End Developer specialized in Angular, with over 8+ years of experience building critical and confidential applications. I have designed and delivered high-performance, secure interfaces by applying best practices in service-oriented architecture, automated testing, and SEO optimization. My experience spans the entire front-end ecosystem, enriched by DevOps environments, API management, and cloud technologies. As a Scrum Master, I have guided teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.

Available to hire

Front-End Developer specialized in Angular, with over 8+ years of experience building critical
and confidential applications. I have designed and delivered high-performance, secure interfaces by
applying best practices in service-oriented architecture, automated testing, and SEO optimization.
My experience spans the entire front-end ecosystem, enriched by DevOps environments, API
management, and cloud technologies.
As a Scrum Master, I have guided teams in adopting agile methodologies, optimizing development
cycles, and integrating scalable solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

French

Fluent

English

Advanced

Polish

Intermediate

Dutch

Beginner

Work Experience

Full Stack Developer at Freelance

July 1, 2024 - November 4, 2025

Analyzed client needs and translated them into concrete frontend and backend features. Created custom design systems tailored to each project’s identity. Designed UX/UI-focused and GEO-SEO-optimized websites (Top 5 ranking). Automated workflows, reducing up to 85% of manual tasks using Make and AI.

Senior Angular Front-End at PROXIMUS

February 1, 2024 - February 1, 2024

Strategic redesign of the main entry point used by all teams. Documented dependencies and ensured service continuity. Overhauled the subscription management system and adapted interfaces to the new design system. Deployed and monitored production applications, supervised an external team through pair programming and code reviews. Updated external libraries and components while enhancing performance and security.

Lead Front-End at STOREVER

May 1, 2020 - May 1, 2020

Internal applications and interfaces optimized for stock tracking, data management and real-time synchronization, as well as data conversion and optimization to accelerate media distribution and transfer. Implemented centralized state management with NgRx; built reusable component libraries; designed workflow-oriented interfaces to reduce recoding for new developers.

Front-End Developer at MCARNOLDS

November 1, 2017 - November 1, 2017

Mobile-first dynamic websites and e-commerce modules; backend enabling centralized management of content and features. Built modular and scalable Angular back-end administration system; collaborated with design and QA teams to ensure UI/UX consistency and technical quality.

Full-Stack Angular/Java Developer at SMALS

February 1, 2017 - February 1, 2017

R&D and large-scale implementation of Angular 2 (beta). Backend Java development for MySQL migration and front-end contract integration. Unit testing, monitoring, and application maintenance.

Full-Stack Developer at Freelance

March 1, 2016 - March 1, 2016

Designed complete visual identities (brand guidelines, logos, design, etc.). Front-end development using HTML5, CSS3, JavaScript (mobile-first approach). Backend with PHP, integrating MySQL databases for dynamic content management. Google APIs (Maps, Places, Geocoding) to enhance functionality; Custom CMS solutions enabling clients to manage content independently.