Stack: symfony, redis, docker, rest, twig integrated mobile carrier billing solutions across 7 projects each integration required writing custom adapter code to connect external carrier apis with the internal billing system and storefront ui developed and maintained backend core functionality: subscription management, api request/response handling for carrier - facing services integrated third - party rest apis with error handling, retry logic, and logging to ensure stability under varying carrier response patterns optimised page load performance by profiling slow queries, reducing n+1 issues, and introducing caching with redis for frequently accessed data worked with tables containing up to 1, 000, 000+ rows applied indexing strategies and query optimisation to maintain acceptable response times participated in a microservices environment: implemented inter - service communication via rest and supported deployment via docker

Built a full - stack tool for creating and managing recruitment offers for candidates, including backend api (laravel) and frontend ui (vue.js) developed a high - throughput product feed parser capable of processing 100, 000+ product records per run implemented both on - demand (user - triggered) and scheduled modes (cron jobs + laravel jobs) designed the parser with chunked batch processing to prevent memory overflow and ensure stable execution on large datasets

Stack: docker, mysql, mariadb, json - rpc, rest designed and implemented json - rpc apis for internal service communication built chatbots for telegram and viber using a custom in - house framework