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I'm Tony Sterezynski, a Front-End Developer specialized in Angular with over 8+ years of experience building critical and confidential applications. I design 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 guide teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.…I'm Tony Sterezynski, a Front-End Developer specialized in Angular with over 8+ years of experience building critical and confidential applications. I design 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 guide teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.

Tony Sterezynski

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

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I'm Tony Sterezynski, a Front-End Developer specialized in Angular with over 8+ years of experience building critical and confidential applications. I design 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 guide teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.…I'm Tony Sterezynski, a Front-End Developer specialized in Angular with over 8+ years of experience building critical and confidential applications. I design 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 guide teams in adopting agile methodologies, optimizing development cycles, and integrating scalable solutions.

Available to hire

I’m Tony Sterezynski, a Front-End Developer specialized in Angular with over 8+ years of experience building critical and confidential applications.

I design 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 guide 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

Language

French

Fluent

English

Fluent

Polish

Intermediate

Dutch

Beginner

Work Experience

Freelance 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 29, 2024 - February 29, 2024

Strategic redesign of the main entry point used by all teams. Documented dependencies and ensured service continuity. Complete overhaul of the subscription management system and adaptation of interfaces to the new design system. In parallel, deployed and monitored production applications, supervised an external team through pair programming and code reviews. Updated external libraries and components while optimizing and refactoring code to improve performance and security.

Lead Front-End at Storever

May 31, 2020 - May 31, 2020

Internal applications and interfaces developed for a company operating within European distribution networks. Optimized processes and designed solutions for stock tracking, data management and real-time synchronization, as well as for data conversion and optimization to accelerate media distribution and transfer. Implemented centralized state management with NgRx (Angular). Built reusable component libraries for visual and technical consistency. Designed workflow-oriented interfaces to reduce recoding for new developers.

Front-End Developer at MCARNOLDS

November 30, 2017 - November 30, 2017

Mobile-first dynamic websites and e-commerce modules developed for an award-nominated web agency. Back-end enabling centralized management of content and features. Dynamic and e-commerce websites with reusable components and CSS/JS animations. Mobile-first optimization and responsive design; modular and scalable Angular back-end administration system; collaboration with design and QA teams to ensure UI/UX consistency and technical quality.

Full-Stack Angular/Java Developer at SMALS

February 28, 2017 - February 28, 2017

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

Full-Stack Developer at Freelance

March 31, 2016 - March 31, 2016

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