available · London software developer · london spring boot · linux · postgres
Fikrat Allahguluzada
Software Developer in London — working on enterprise Spring Boot systems, growing into backend engineering and infrastructure.
Politics & International Relations graduate, self-taught engineer for over five years — started with Java plugins for game servers, moved into backend engineering. Currently a Software Developer at Renful in London, working on legacy modernisation, REST APIs, and Linux production environments.
$ whoami
fikrat allahguluzada · software developer · london
$ background --short
politics & ir graduate · 5+ years self-taught · joined renful 2025
$ stack
java/spring-boot · postgres · linux · python
$ status
> growing into backend engineering, one production system at a time
5+
years self-taught
Spring
current focus
Linux
daily driver
London
based · UK
Java Spring Boot PostgreSQL Linux Python Bash Git Docker REST MongoDB Redis JavaScript TypeScript Next.js React Node.js Nginx Java Spring Boot PostgreSQL Linux Python Bash Git Docker REST MongoDB Redis JavaScript TypeScript Next.js React Node.js Nginx
/now
What I'm on, currently
A small, deliberately incomplete snapshot — updated when something genuinely changes, not on a schedule.
last updated · 2026-06-01
Building features on an enterprise Spring Boot platform at Renful — REST APIs, reporting, Linux production.
Studying event-driven patterns and messaging systems — Kafka, queues, retries.
Pushing small backend repos to GitHub as I work through them.
Writing short notes on infrastructure, AI policy, and the geopolitics of computing.
Reading more politics than tech, honestly — it shows up in how I think.
Interested in fintech, infra, and media-tech — always up for a good conversation.
Public Code
Live on GitHub
Most of what I've built sits in private repos — client work, side projects, modifications I sold years ago. This one's open: a take-home assignment with concurrency protection at its core.
REST API that shortens URLs, tracks click counts, and caches hot redirects in Redis. Submitting the same URL twice returns the same code — no duplicates.
Redis cache on the redirect path — cold misses fall back to PostgreSQL and warm the cache
Idempotent shortening: same URL in → same code out
Atomic click counter via UPDATE ... SET click_count = click_count + 1
Unit tests with Mockito covering cache hit, cache miss, and not-found paths
Event-driven order processing: REST API publishes order events to Kafka, a consumer reads and persists them to PostgreSQL. Demonstrates producer/consumer, idempotent processing, and KRaft-mode Kafka.
POST /api/orders returns 202 immediately — processing is async via Kafka
Consumer deduplicates on order ID before persisting — safe for at-least-once delivery
Topic created with 3 partitions, keyed by orderId for ordered per-order processing
Kafka running in KRaft mode (no Zookeeper) via Docker Compose
Production-shaped NestJS backend: product catalog, cart management, and checkout with real concurrency protection via SELECT FOR UPDATE. Built end-to-end as a take-home assignment.
Checkout locks cart + product rows in sorted order to prevent deadlocks and overselling
Soft-deleted products stay invisible in catalog but preserve order history snapshots
Order cancellation with atomic stock restoration
Concurrency stress test: two simultaneous checkouts compete for single-unit stock — exactly one wins
One-command boot via Docker Compose; Swagger at /api
NestJSTypeScriptPrismaPostgreSQLDockerSwagger
// github · live
Recent activity
Pulled live from the GitHub API, revalidated hourly. Not curated.