I’m a frontend / full-stack developer with 7+ years of experience focusing on UI development, performance optimization, WordPress, VPS, A/B testing, and user-focused improvements. I’ve contributed to both custom architectures and large enterprise platforms (Samsung – Hybris & AEM; Herbalife – AEM), analyzing user behavior, refining UX flows and supporting CRO tasks. I work with HTML, CSS, JavaScript, React/Next.js, Node, Tailwind, PHP, WordPress, and analytics/A/B testing tools. I enjoy improving interfaces, removing friction and making products faster, clearer and easier to use. Beyond frontend, I have solid experience with VPS environments, Docker, Traefik, Strapi, Express/Node APIs and n8n automation, which helps me understand the full picture—from UI and UX to performance, data and infrastructure. I’m independent, communicative, and comfortable collaborating with remote, international teams.

Marcin Sojka

I’m a frontend / full-stack developer with 7+ years of experience focusing on UI development, performance optimization, WordPress, VPS, A/B testing, and user-focused improvements. I’ve contributed to both custom architectures and large enterprise platforms (Samsung – Hybris & AEM; Herbalife – AEM), analyzing user behavior, refining UX flows and supporting CRO tasks. I work with HTML, CSS, JavaScript, React/Next.js, Node, Tailwind, PHP, WordPress, and analytics/A/B testing tools. I enjoy improving interfaces, removing friction and making products faster, clearer and easier to use. Beyond frontend, I have solid experience with VPS environments, Docker, Traefik, Strapi, Express/Node APIs and n8n automation, which helps me understand the full picture—from UI and UX to performance, data and infrastructure. I’m independent, communicative, and comfortable collaborating with remote, international teams.

Available to hire

I’m a frontend / full-stack developer with 7+ years of experience focusing on UI development, performance optimization, WordPress, VPS, A/B testing, and user-focused improvements. I’ve contributed to both custom architectures and large enterprise platforms (Samsung – Hybris & AEM; Herbalife – AEM), analyzing user behavior, refining UX flows and supporting CRO tasks.

I work with HTML, CSS, JavaScript, React/Next.js, Node, Tailwind, PHP, WordPress, and analytics/A/B testing tools. I enjoy improving interfaces, removing friction and making products faster, clearer and easier to use. Beyond frontend, I have solid experience with VPS environments, Docker, Traefik, Strapi, Express/Node APIs and n8n automation, which helps me understand the full picture—from UI and UX to performance, data and infrastructure. I’m independent, communicative, and comfortable collaborating with remote, international teams.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Freelance Front-end / Full-stack Developer at Freelancer
January 1, 2020 - Present
Designed and deployed a secure, containerised architecture (Debian VPS, Docker, Traefik as reverse proxy, Cloudflare Zero-Trust, WAF block rules, TLS automation, network and container isolation). Built an isolated Node.js/Express API with JWT-based access enforcement, origin-guard logic and strict request filtering (403 for internal SSH curl without valid token). Created modular React + Next.js + TypeScript + Tailwind + GrapesJS + MotionOne + MongoDB website-builder platform with custom blocks, animations, dynamic content and remote API sync. Developed custom WordPress plugins integrating GraphQL APIs, rebuild triggers and headless workflows. Performed architecture and security reviews focusing on authentication logic, RBAC boundaries, multi-tenant isolation, and bypass-risk analysis. Delivered high-performance front-end solutions (SSR/SSG/ISR) with Core Web Vitals improvements (+40%). Managed server-level operations (Nginx, Plesk, WP Engine, PostgreSQL, Strapi, n8n).
Digital Operations Manager at Herbalife
January 1, 2024 - December 31, 2024
Managed content and campaigns in AEM + Hub for 15 markets. Coordinated QA and optimization processes, ensuring brand consistency.
ICT Technician at ZT Systems NL
January 1, 2023 - December 31, 2024
Supported Microsoft and Amazon server infrastructure in data centre environment. Debugging, hardware replacement, and software updates on servers. Assisted in server administration and infrastructure management, ensuring uptime and reliability.
WordPress Developer at Grow Nearby US
January 1, 2022 - December 31, 2023
Managed 200+ WordPress sites, including multisite environments and performance optimization. Integrated APIs and optimized Core Web Vitals across multiple client projects. Handled server-level operations (Plesk, WP Engine) and automated deployments.
Junior WordPress Developer at Grow Nearby US
January 1, 2021 - December 31, 2022
Developed and optimized WordPress sites (PHP, JavaScript ES, jQuery, Vanilla). Integrated APIs and improved site performance.
QA / Technical Admin / Lab Tester / Quality Coordinator at Earlier UK roles
January 1, 2014 - December 31, 2019
Process optimization, documentation and quality assurance.
Frontend / Full-stack Developer at Freelancer
January 1, 2020 - Present
Designed and deployed a secure, containerised architecture (Debian VPS, Docker, Traefik as reverse proxy, Cloudflare Zero-Trust, WAF BLOCK rules, TLS automation, network and container isolation). Built an isolated Node.js/Express API with JWT-based access enforcement, origin-guard logic and strict request filtering. Created a modular React + Next.js + TypeScript + Tailwind + GrapesJS + MotionOne + MongoDB website-builder platform with custom blocks, animations and remote API sync. Performed architecture and security reviews focusing on authentication, RBAC boundaries and multi-tenant isolation; delivered high-performance SSR/SSG/ISR front-end with Core Web Vitals improvements. Managed server-level operations (Nginx, Plesk, WP Engine, PostgreSQL, Strapi, n8n).
Digital Operations Manager at Herbalife (UK & EMEA, remote)
January 1, 2024 - January 1, 2024
Managed content and campaigns in AEM + Hub for 15 markets. Coordinated QA and optimisation processes, ensuring brand consistency.
WordPress Developer at Grow Nearby US, Remote (PL)
January 1, 2022 - January 1, 2023
Managed 200+ WordPress sites, including multisite environments; integrated APIs and optimised Core Web Vitals across multiple client projects. Handled server-level operations (Plesk, WP Engine) and implemented deployment automation.
Junior WordPress Developer at Grow Nearby US, Remote (PL)
January 1, 2021 - January 1, 2022
Developed and optimised WordPress sites (PHP, JavaScript ES, jQuery, Vanilla). Integrated APIs and improved site performance.
QA / Tech Admin / Lab Technician / Quality Coordinator at Earlier UK roles
January 1, 2014 - January 1, 2019
Process optimisation, documentation, and quality assurance responsibilities across multiple projects.

Education

Leadership & Management at North Lindsey University (Scunthorpe, UK)
January 11, 2030 - April 8, 2026
IT Technician at IT University Technical
January 11, 2030 - April 8, 2026
Leadership & Management at North Lindsey University
January 11, 2030 - April 8, 2026
IT Technician at IT University
January 11, 2030 - April 8, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Education, Other