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 scientific calculator and graphing tool built around one idea: type long, natural math expressions and plot several functions at once, with full complex number support. Nearly 1M lifetime installs on Google Play.

View on Google Play

Math Codings

A numerical methods toolkit with the same intuitive expression input as SpecExp — complex number and matrix operations, Newton's method, Lagrange interpolation, Taylor series, Gaussian elimination, and linear system solving.

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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