Responsibilities:Designed and developed a multi-tenant SaaS system for a container terminal, managing the process from architecture to production.Provided technical leadership in a 15-person startup, overseeing a distributed backend team of 3 developers.Contributed to decision-making for frontend, mobile, DevOps, Ruby, and 1C teams.Collaborated closely with the CPO, CEO, and stakeholders to align the system with business requirements.Achievements:Built and led the backend development team from scratch.Delivered the product release with minimal delay, streamlining the development process.Technologies:Java 17, TDD, DDD, EDA, CQRS, Onion Architecture, PostgreSQL, Redis, Elastic Search, S3, Spring, OTP, Testcontainers.

Responsibilities:Participated in the Architecture Committee and conducted technical interviews to assess candidates' skills.Optimized application performance and SQL queries, addressing technical debt.Developed business features and maintained the system to ensure stability and scalability.Achievements:Reduced database disk usage by 30% through database restructuring.Improved data processing speed by developing services for billing, statistics, and archival data.Introduced daily releases, significantly reducing time-to-market.Enhanced system performance by optimizing critical SQL queries and eliminating technical debt.Technologies:Java 17, Kafka, S3, Python, Golang, Spring, ClickHouse DB, PostgreSQL, CockroachDB, CouchDB

Responsibilities:Led a technical team of developers in Vietnam, providing guidance and support to the group.Held the position of solution architect for 1C:Retail in Vietnam. 1C:Retail is commercial software for small and medium-sized companies, allowing management of the entire business process of the company.Achievements:Developed a module for e-invoices, providing accountants with the ability to interact with the Vietnamese government system directly from their accounting software.