About Sergei
Russian
Native or bilingual
English
Conversational
Experience
- Self-employedSoftware DeveloperDIGITAL AND ITMarch 2026 - May 2026 (2 months)London, United KingdomFounder & Software Engineer — Clean Plate SocietyDesigned and launched a subscription-based iOS application that helps families encourage positive mealtime habits through achievement tracking and collectible rewards.Responsibilities included product design, software architecture, SwiftUI development, App Store monetization, subscription management with RevenueCat, App Store Connect configuration, TestFlight distribution, compliance management, and production deployment. Successfully navigated Apple's review process, implemented auto-renewable subscriptions, and delivered a fully operational consumer application from concept to public release.Technologies: Swift, SwiftUI, RevenueCat, StoreKit, App Store Connect, TestFlight, GitThe app URL:
- OnBuySenior PHP DeveloperE-COMMERCEMarch 2024 - Today (2 years and 3 months)London, United KingdomDelivered and iterated on high-impact features for the marketplace platform, partnering closely with the frontendto scope and evolve APIs.Diagnosed and resolved critical performance bottlenecks for high-traffic marketplace pages, improving systemuptime and response times under peak load.Stabilised and modernised legacy services and microservices (Laravel), prioritising and paying down technical debtto improve reliability and maintainability.Strengthened quality with automated tests and actionable regression notes; mentored peers through reviews andpair programming.Drove continuous delivery within Scrum ceremonies, improving flow and visibility across the team.Enhanced system resilience by implementing PubSub messaging patterns and DeadLetter queues to ensure reliableprocessing of asynchronous tasks.Leveraged Google Cloud Platform (GCP) to architect resilient backend monitoring and storage solutions, includingcentralised logging, real-time queue health monitoring, and scalable cloud storage.
- self-employedSoftware EngineerDIGITAL AND ITNovember 2022 - March 2024 (1 year and 4 months)London, United KingdomBuilt a ChatBot microservice bridging Facebook and Telegram using Domain-Driven Design (Clean Architecture);designed clear interfaces and documentation. For customers who prefer reading information using Telegram. Stack:PHP, Docker, PostgreSQL, Doctrine. GitHub: Developed a meal-planner API using Domain-Driven Design (Clean Architecture) Stack: in Go (Go-Chi), MongoDBand Redis; exposed REST, GraphQL, and gRPC (MVP); containerised with Docker and instrumented with Logrus. Forcustomers who want to know what they need to buy for the next few weeks and how they can cook it. GitHub:
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Education
- BachelorSynergy2019It was the state university in Moscow.