Backend Developer (Wildberries ecosystem) Разрабатываю и поддерживаю высоконагруженные backend-сервисы в e-commerce домене (Wildberries). Основной фокус — обработка данных о товарах, ценах, скидках и интеграции с внутренними и внешними системами. Отвечаю за: — Проектирование и развитие микросервисной архитектуры — Реализацию бизнес-логики для pricing, скидок и валидаций — Работу с PostgreSQL (оптимизация запросов, индексы, транзакции) — Интеграции через Kafka / брокеры сообщений (асинхронные процессы, консюмер-группы) — Обеспечение отказоустойчивости и масштабируемости сервисов — Code review, улучшение качества кода и архитектурных решений Технологии: Go, PostgreSQL, Kafka, Docker, Kubernetes, REST, CI/CD Работаю с highload-системами, где важны производительность, надежность и корректность данных. Участвую в проработке архитектуры и принятии технических решений.

Responsibilities: - Development and maintenance of high-load backend microservices using Go. - Work with PostgreSQL, Kafka, Redis for reliable data storage and event-driven processing. - Participation in system design and architecture with solution architects. - Code reviews and implementation of development best practices. - Collaboration with cross-functional teams on integrations and feature delivery. - Onboarding and mentoring new developers. Key achievements: - Implemented multiple services for loyalty programs, digital content delivery, e-learning, ticketing, and promotional campaigns, used by thousands of customers. - Enhanced the company’s e-commerce platform with new payment options, catalog improvements, and optimized reporting tools. - Improved scalability, reliability, and maintainability of core backend systems.

Responsibilities: - Development of backend services for a high-load payment processing system. - Work with Go, PostgreSQL, Kafka, Redis, Docker, Jenkins, Git. - Participation in integrations with Mastercard APIs and onboarding processes for merchants. - Support and optimization of transaction services, ensuring stability and reliability. Key achievements: - Developed MPGS API (Mastercard Payment Gateway Services) and Masterpass integration, enabling secure online payments. - Built a checkStatus service to synchronize transaction states between administrator and bank, reducing errors and delays in payment processing. - Implemented a merchant onboarding service, allowing partners to register online by submitting documents and forms without visiting the office. - Optimized logging system that previously caused service overload and memory issues.

- Golang, and Python; - Postgres (index), MySQL, Postgres, Amazon Web Service; - Linux, Bash, Docker, Git - Rest API, Google API, etc. - Code-review, SOLID, DRY, KISS, OOP - Unit, Integration, API Tests, Benchmarks, Profiling; - GORM, Gorilla Mux, UUID, Crypto - Kanban, Agile - Data Structure and Algorithms, Interface, Goroutine, Context

- conduct classes in Python as well as algorithms, solving algorithmic problems

Teaching students from Intermediate to Advanced English, as well as conducting speaking classes from time to time.

- planning, preparing and delivering lessons - preparing teaching materials - helping pupils improve their listening, speaking, reading and writing skills via individual and group sessions

- Analysis and research of various telecommunication markets around the world; -Support product development with data and analysis to provide recommendations to marketing and sales management executives; - Commercial valuation based on research telecommunications market for IoT, Smart Metering (Gas), tariffs Jasper Sim-management, NB IOT, other networks Low-power WAN, M2M.