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Дмитро

Golang Backend Engineer

Age:
19 years
City:
Lviv

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DMYTRO SUMTSOV
Lviv, Ukraine [open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) in/dmytro-sumtsov-998917264

SUMMARY
Software Engineer with 2+ years of experience in building and maintaining scalable, high-performance web applications, primarily in startup
environments. Skilled in backend development, with a strong focus on writing clean , scalable , maintainable code and delivering reliable solutions.
Comfortable working across the stack and collaborating in cross-functional teams to bring ideas from concept to production.

SKILLS
Programming Languages: Golang, Python
Frameworks & Databases: PostgreSQL, MySQL, Minio, Redis, Dragonfly, MongoDB, Clickhouse
Tools: NATS, Kafka, RabbitMQ, gRPC, AWS (S3, SQS, SES), Docker, Kubernetes

EXPERIENCE
Software Engineer
Digital Unicorn June 2023 - June 2025, France, Paris
• Optimized API performance, achieving a 40% decrease in average response time by implementing in-memory caching (Redis) and minimizing
redundant database queries.
• Changed the microservice architecture to a monolithic one, thereby increasing the response speed by 10%.
• Improved system scalability by refactoring architecture.
• Supported database design, scalability and optimization.
• Integrated PostgreSQL Materialized Views to cache complex joins and aggregations, reducing dashboard query time from ~1.8s to ~180ms.
• Implemented room popularity system, that delivered real-time rankings by fetching the top-100 rooms in under 15 ms.

EDUCATION
Bachelor’s degree
Ivan Franko National University of Lviv • 2023-2027

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