Maciej Ziolko

New York, USA | Remote

• Led a full architectural transformation of a complex, legacy multi-provider stack into a unified, scalable AWS-based platform.
• Directed end-to-end system modernization, replacing fragmented third-party infrastructure with consolidated AWS services, reducing operational complexity and maintenance overhead.
• Simultaneously maintained and stabilized legacy systems (Laravel + React frontend, Laravel backend/dashboard, Node.js messaging services) while planning and executing a full system rewrite.
• Rebuilt core platform components: migrated frontend to Next.js, re-architected backend API in Laravel, transitioned CMS from Contentful to Sanity.
• Designed new DocumentDB (MongoDB) collection model and backend domain using DDD principles.
• Implemented production-grade Redis caching layer for API queries and EFS-based image caching across Kubernetes pods, significantly reducing latency and improving horizontal scalability.
• Led cross-functional collaboration with the PO and VP of Engineering to define technical roadmap and delivery strategy.
• Expanded engineering team (2 engineers, UX/UI, Product Owner), providing technical leadership and architectural guidance.
• Spearheaded complex third-party integrations: Roblox (in-game rewards sync), Iterable (SMS & email automation), TurboVote (official U.S. voter registration workflows).
• Led a team during a two-sprint hackathon to build ChatSomething, an AI-based chatbot providing users real-time, intelligent responses about DoSomething's services, leveraging OpenAI technology.
• Designed and deployed an AI-powered content moderation pipeline using AWS Bedrock (Claude), integrating automated classification and filtering of user-generated submissions directly into the backend domain layer with fallback logic and audit tracking, significantly reducing manual moderation workload and review response time.

Stack: PHP, JS, TS, CSS, Laravel, React, Next.js, MySQL, Sanity CMS, MongoDB, OpenAI, Jira, Intruder, Iterable, Heroku, Papertrail, Cloudflare, Twilio, Contentful, GhostInspector, Redis, RabbitMQ, CQRS, DDD, GTM, GA4, Jest, StoryBook, Kickbox, Google Places, New Relic, AWS (DocumentDB, EKS, EC2, S3, CloudFront, CloudWatch, ElastiCache, ELB, VPC, WAF, MediaConvert, CloudTrail, SQS, SNS, API Gateway, EventBridge)

Cracow, Poland

• Client: DoSomething | Non-profit.
• Client: Bitlane | Digital Agency.
• Client: AllMyHomes | Real Estate - landing pages for homes and apartments.
• Client: Exhibit-e | Fine-Arts - custom-made CMS and CRM for art galleries, built with Symfony, PHP, Angular.

Remote

• Hourly, on-demand hands-on development and consultancy.
• PHP, WordPress, Shopify, CraftCMS, JS, CSS, Webflow, Mailchimp.

Remote

• Led client projects as the main developer, managing all phases from consultations and technical requirement definition to full implementation.
• Designed and implemented a complete WordPress-based podcast system for multimedia content management.
• Took charge of building the Bitlane website, ensuring consistency with the overall brand identity and a seamless user experience.

Stack: PHP, JS, MySQL, WordPress, Chisel, Typo3, CraftCMS, React, OpenImmo

Cracow, Poland

• Maintained and enhanced the online machinery catalogue, ensuring up-to-date machine listings and pricing details.
• Developed and implemented a custom WordPress template tailored to the unique requirements of the catalogue.
• Integrated the platform with external portals such as Mascus, Mobile.de, Autoline, and Otomoto via REST and SOAP APIs.
• Participated in offline auctions and on-site machinery sales, bridging online listings with physical transactions.

Stack: PHP, JS, CSS, MySQL, WordPress, REST and SOAP API integrations

Cracow, Poland

• Developed and maintained engaging landing pages using PHP, JavaScript, CSS, and WordPress, while contributing to the evolution of a Laravel-based (Filament) platform for marketers.
• Implemented and maintained e-commerce solutions across multiple platforms, including WooCommerce, Shoper, PrestaShop, and Shopify.
• Assisted in defining and streamlining internal processes to enhance workflow efficiency.
• Mentored and trained new hires, ensuring a smooth onboarding process.
• Conducted technical interviews to evaluate candidate skills and support recruitment efforts.

Stack: PHP, JS, CSS, MySQL, WordPress, Laravel, Filament, Shoper, PrestaShop, Shopify, WooCommerce, GA, GTM, Docker