Nikolai Mazein

Golang Developer @ Wildberries

About

Backend Developer with 5 years of commercial experience, working in teams ranging from 2 to 18 members, both remotely and on-site. Built full cycle of development: from gathering requirements from the product owner, through solo or team-based implementation, to release with high test coverage and detailed analytics.

Country

Kazakhstan

City

Astana

Industry

Computer Software

Skill

Pandas, gRPC, RabbitMQ, Object-Oriented Programming (OOP), Microservices, REST APIs, Apache Kafka, Redis, Unit Testing, Docker, Prometheus, Highload, Software Project Management, SQL, Back-End Web Development, Python (Programming Language), Go (Programming Language), Software Architecture, Project Management, PostgreSQL

Experience

Golang Developer

Wildberries

2023-12 - Present · 2 yrs 10 mos

Almaty, Kazakhstan

- Cut $20,000+ in annual API costs of an external maps provider by building the in-house vehicle-routing API for maps service WB Maps (https://wb-maps.wb.ru), powering courier deliveries across millions of daily orders. - Enabled a new income stream by building the core backend for taxi service WB Taxi (https://wbtaxi.com.by/), which now serves 1,000+ rides daily. It is backed by WB Maps (https://wb-maps.wb.ru) and operates with 0 paid external providers. - Enabled dynamic pricing for WB Taxi (https://wbtaxi.com.by/) by building a telemetry service that collects real-time GPS from drivers, scalable to 10,000+ cars.

Back End Developer

2GIS

2021-8 - 2023-12 · 2 yrs 5 mos

Novosibirsk, Russia

- Increased MAU from 50.2M to 51.5M (+2.59%) for 2GIS Navigator (https://play.google.com/store/apps/details?id=ru.dublgis.dgismobile) by building a lane-signage service that flagged data errors for review and fix, improving lane guidance and navigator accuracy. - Reduced accident response time by 31% at a Middle-Eastern oil refinery by building an on-prem road-restriction API that enabled custom access rules on private maps to reroute traffic away from accident zones. - Reduced B2B query latency from 1000+ ms to under 200 ms by helping break a monolith into microservices and building a request-splitter for the 2GIS Routing API (https://docs.2gis.com/en/api/navigation/routing/overview).