Shikhkarim
Mammadov
I design and build systems that handle financial transactions, high-throughput data flows, and complex distributed state — grounded in mathematical precision and long-term engineering discipline.
Selected work
Projects built with a focus on reliability, architectural clarity, and measurable impact.
Callman
Callman is a desktop-first developer and QA automation platform that combines API testing, collection management, dynamic environments, database/Kafka/Redis validation, node-based scenario building, contract testing, CLI execution, and enterprise-grade workflow automation into a unified system. Designed as a Postman-class platform with deeper operational testing, Callman enables teams to build, validate, automate, and operationalize complex system behaviors across APIs, databases, event streams, and infrastructure layers.
GitSense
GitSense is a full-scale enterprise engineering intelligence platform built to transform raw GitLab activity into actionable business, delivery, workforce, and executive insights. Designed for large organizations with complex tribal/squad structures, GitSense ingests GitLab users, projects, commits, merge requests, reviews, discussions, approvals, pipelines, and DORA metrics into a unified analytics engine. Beyond traditional Git analytics, it introduces Workforce Intelligence, Product Delivery Economics, Portfolio Intelligence, Org Suggestion Systems, and advanced engineering graph capabilities — enabling leadership to measure not just code activity, but business efficiency, salary utilization, product health, and strategic execution quality.
edu-live.com
edu-live.com is a globally accessible education-focused digital platform designed to aggregate and distribute international educational news, scholarship opportunities, academic programs, institutional announcements, and career-growth pathways for students across 50+ countries. Built end-to-end with Node.js, Express.js, and MongoDB, the platform includes a fully custom backend ecosystem and administrative control panel engineered for scalable publishing, multilingual-friendly growth, category-rich content operations, and international audience reach. More than a conventional content site, edu-live functions as a global education opportunity infrastructure connecting users with actionable academic and professional pathways.
Operating principles
The beliefs that shape how I approach system design, code, and engineering decisions.
Correctness before scale
Scale amplifies both strengths and flaws. A system that scales incorrectness is more dangerous than one that fails early. Reliability, transactional integrity, and correctness are foundational — performance comes after truth.
Explicit contracts over hidden assumptions
Every boundary — API, event, database, or team — should define guarantees, failure modes, and expectations clearly. Undefined assumptions become operational debt under load.
Composable systems over fragile complexity
Systems should evolve through composition, not entanglement. Modular services, typed boundaries, and clear responsibilities create architectures that survive growth.
Observability is part of the design
A deployment without instrumentation is an untested theory. Logging, metrics, tracing, and measurable feedback loops are not optional afterthoughts — they are architecture.
Maintainability compounds like technical capital
Shortcuts often borrow against the future with interest. Clean abstractions, operational clarity, and long-term maintainability are force multipliers for both product and engineering velocity.
Products & tools built
Systems I have designed, built, or led — from consumer-facing platforms to internal engineering tooling.
GitSense
GitLab engineering intelligence platform that ingests repositories, merge requests, pipelines, approvals, and team activity into actionable analytics for productivity, DORA metrics, code health, and organizational performance.
↳ On-premise deployment — contact for access
Callman
Postman-inspired desktop API platform focused on advanced request management, environment systems, contract validation, developer workflows, and premium product-grade API tooling.
↳ Desktop application — early access available
Azericard Payment Integration
Open-source Node.js payment integration library for Azericard gateway systems, designed to simplify secure payment processing, transactional communication, and banking gateway integration for developers building fintech products.
Knowledge map
The technical domains I work within, from daily production tools to deeper areas of specialization.
Backend Architecture
Architecting production-grade backend ecosystems: service boundaries, API contracts, protocol strategy, domain modeling, and system topology that scales cleanly from monolith to distributed platforms.
Distributed Systems
Designing resilient distributed platforms with practical consistency tradeoffs, event choreography, failure recovery, and concurrency-aware state management under production load.
Fintech Engineering
Engineering correctness-critical financial systems across payments, investment flows, transaction lifecycles, reconciliation, settlement, and margin-sensitive architectures.
Java / Spring Ecosystem
Enterprise-grade JVM engineering across Spring Boot microservices, reactive architectures, secure backend infrastructure, and high-throughput backend systems.
Node.js / TypeScript
Full-scale backend and product engineering with Node.js ecosystems spanning NestJS, Express, SSR infrastructure, enterprise APIs, and developer tooling products.
Streaming / Messaging Infrastructure
Operational messaging systems for real-time event pipelines, asynchronous processing, stream consumers, and scalable cache-backed architectures.
Let's build something precise.
If you're working on a system that needs to be correct, fast, and maintainable at scale — I'm open to conversations about technical collaboration, consulting, or full-time roles.