Artem Validzhanov
@artemvalidzhanov
Backend engineer at Innotech who cut core banking endpoint latency from 12 seconds to 2 with batched requests.
ArmeniaWhat I'm looking for
At Innotech, I cut latency on several core banking endpoints from 12 seconds to 2 by replacing per-item downstream calls with a single batched request. I also built about 30 REST endpoints over PostgreSQL stored procedures, used by 3–4 teams.
On Innotech’s board-meeting and e-voting platform, I migrated four microservices to Java 17 and Spring Boot 3.5 and built real-time presentation sync across Kubernetes pods using Kafka. Earlier, at Absolut Insurance, I owned end-to-end sign-in through Russia’s ESIA identity provider, including OAuth 2.0 and OpenID Connect integration.
Experience
Work history, roles, and key accomplishments
Senior Java Developer
Innotech
Apr 2026 - Oct 2026 (6 months)
Core banking accounting engine: API layer.
• Cut latency of several endpoints from 12 s to 2 s (6×) by replacing per-item calls to downstream services with a single batched request.
• Built ~30 REST endpoints over PostgreSQL stored procedures (accounts, contracts, documents), consumed by 3–4 teams.
• Mapped PostgreSQL SQLSTATE errors from Hibernate exceptions to RFC 7807 ProblemDetail responses (4
Java Developer
Innotech
Sep 2024 - Apr 2026 (1 year 7 months)
Board-meeting & e-voting platform for enterprise and public-sector clients.
• Migrated 4 microservices from Java 11 / Spring Boot 2 to Java 17 / Spring Boot 3.5 in 3 months: Jakarta EE, Hibernate 6, Spring Security 6, new JDK 17 images and Helm charts, staged rollout.
• Built real-time presentation sync over WebSocket/STOMP with JWT handshake auth and per-meeting authorization, scaled across Kuber
Junior Java Developer
Absolut Insurance
Jun 2023 - Sep 2024 (1 year 3 months)
Front-office platform on top of the core insurance system: sales, partner cabinets, claims intake. ~1,000 staff, agent and corporate users. Java 11, Spring Boot 2.7, Oracle.
• Owned end-to-end sign-in via Russia's national e-government identity provider (ESIA): OAuth 2.0 / OpenID Connect, GOST-signed requests, customer matching by passport and social security number, including no-match and multi-m
Education
Degrees, certifications, and relevant coursework
Moscow State University of Transport (MIIT)
Bachelor's Degree, Applied Informatics
2021 - 2026
Tech stack
Software and tools used professionally
Availability
Location
ArmeniaAuthorized to work in
Salary expectations
Social media
Job categories
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