About Me

I'm a Software Architect and Java Chapter Lead based in Baku, with roots in mathematics rather than computer science — I started programming on a Symbian phone as a math student, because I couldn't afford a PC and wanted to teach myself Java by rebuilding a calculator I'd already written. That calculator eventually became SpecExp, now with close to a million installs on Google Play.

Over the past 10+ years, I've worked mostly on backend systems for payment platforms and banking infrastructure — first at GoldenPay, building and scaling a core payment gateway from the ground up, then at ABB, where I now lead Java engineering across multiple squads.

My approach to architecture is fairly consistent: understand the actual problem before reaching for a technology. That's led me to some unusual solutions — replacing distributed locks with database row-claiming, building a browser-to-hardware bridge from scratch when Java applets stopped working overnight, compressing a 1.5GB batch job down to a 3-minute pipeline by questioning an assumption nobody had checked. I'd rather spend a day understanding why something is slow or fragile than a week adding infrastructure around the symptom.

I still write code regularly, review across teams, and mentor engineers — and outside of work, I keep building things for the same reason I started: because I like it.

Skills

Java: Spring Boot, WebFlux, Hibernate, Hikari CP, AOP, Reflection API, Apache HTTP Client, Apache Commons, OkHttp, Log4j, Slf4j.

Project Builders: Gradle, Maven, Apache Ant, GruntJS

VCS: GitLab, Bitbucket, SVN, GitHub

Distributed Systems: Redis, Apache Camel, Spring Batch, Kafka

My Projects

SpecExp Calculator

A versatile scientific calculator for engineers and mathematicians with advanced functions, intuitive interface, and offline use.

View on Google Play

Math Codings

Advanced math programming application for engineers and programmers. Features complex number and matrix operations.

View on Google Play

Experience

Java Chapter Lead, ABB (May 2023 - Present)

• Lead Java backend engineering across multiple squads, combining architecture, code review, and hands-on delivery for core banking systems.
• Designed a Spring Cloud Gateway protection layer (Redis + Lua) in front of a Flexcube-based core banking system to isolate failing modules and apply backpressure before an anomaly can spread.
• Redesigned distributed task processing around database row-claiming instead of application-level locks, eliminating recurring duplicate-processing incidents.
• Cut a 1.5GB batch file pipeline from ~20 minutes to ~3 minutes by switching to compressed streaming input with Spring Batch and Apache Camel.
• Serve as the go-to reviewer for other squads' backend and concurrency issues on systems my team owns.

Software Architect, ABB (Sep 2020 - May 2023)

• Owned backend architecture for the Payment and Transfer domains across multiple Java teams, balancing architectural decisions with direct delivery.
• Led modernization of legacy enterprise components onto Java and Spring-based services.
• Root-caused and fixed a framework-level memory leak in Spring Data repository usage, tracked down via Dynatrace.
• Introduced short-transaction and row-lock patterns for concurrent task processing, replacing misapplied distributed locking across teams.
• Mentored engineers on transaction boundaries, concurrency, and — just as often — when not to reach for Kafka or another queue.

Head Of Software Development, Goldenpay (Jun 2018 - Aug 2020)

• Led the migration of the registered Hesab.az platform from .NET to Java, including reverse-engineering a compatible BCrypt implementation so every existing user's password kept working without a reset.
• Designed a dynamic merchant-configuration system for QuickPay, so new merchants could go live through API configuration instead of code changes and redeploys.
• Built a browser-to-smart-card bridge using WebSocket and a custom protocol, replacing Java applet support after browsers dropped it — shipped to production and later adopted as the platform standard.
• Designed a configurable Campaign Service for bonuses, rewards, and achievements.
• Diagnosed and fixed a shared-state concurrency bug that could route one customer's billing result onto another customer's smart card.

Senior Software Engineer, Goldenpay (Jan 2015 - Jun 2018)

• Built backend integrations across SOAP, REST, and RPC for more than ten payment merchants with completely different APIs, standardized behind a common plugin abstraction.
• Investigated and resolved a recurring duplicate-billing issue through root-cause concurrency analysis.
• Helped migrate core payment services from a custom MVC/Ant stack to Spring MVC and Maven.
• Prototyped an interactive SVG-based seat-map system for a client's ticketing platform, which became the technical basis for their production feature.

Java Developer, Goldenpay (May 2012 - Jan 2015)

• Developed and supported Java payment and merchant-integration applications from the ground up.
• Investigated production issues across Java, HTML, and PHP codebases, performing root-cause analysis and shipping fixes.
• Progressively took on more ownership — production support, integrations, cross-team troubleshooting.

Software Engineer, LSIM (Nov 2011 - May 2012)

• Built a J2ME mobile catalog application with a fully custom canvas-based UI, since the platform had no native framework for it at the time.
• Automated a manual catalog and content-packaging process that had previously been done entirely by hand.
• Built automation tooling in Excel/VBA and Delphi that replaced a third-party paid product with an internal equivalent.

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