About | Sercan Kara

I'm Sercan Kara, a Senior Backend Architect and Independent Developer based in Istanbul. For over 13 years, I have been designing, scaling, and maintaining backend infrastructures—ranging from high-throughput e-commerce microservices to security-critical network management software.

My core expertise centers around Go, PHP, Docker, and Kubernetes. Over the years, I've led foundational migrations from monoliths to microservices, orchestrated zero-downtime cloud transitions (AWS to GCP), and built unified logistics infrastructures integrating dozens of external providers.

Today, as an independent developer and backend architect, I focus on building resilient B2B SaaS platforms, high-performance captive portal and log engines compliant with strict regulations, and developer-first API services.

Experience

June 2025 — Present

Independent Software Developer & Architect

Architecting multi-tenant SaaS platforms (Customer Support & ITSM portals), high-throughput 5651 log compliance engines using Go, PHP, and ClickHouse, and self-hosted deployments via Dokploy and Coolify.

Dec 2021 — May 2025

Senior Software Developer — FLO Mağazacılık

Decomposed the core e-commerce monolith into a scalable Stock Microservice. Co-architected the large-scale AWS to GCP cloud migration. Engineered a zero-downtime logistics pipeline supporting 10+ cargo providers and optimized same-day delivery microservices using Kubernetes, Go, PHP, and Couchbase.

March 2018 — Dec 2021

Senior Software Developer — Inforelics Yazılım

Developed centralized Hotspot, firewall, and access point management software deployed across municipalities and public institutions. Managed CI/CD release cycles and low-level Linux/socket network services.

Aug 2013 — March 2018

Senior Developer & Systems Specialist — Enkay Group

Established the in-house development unit, digitized retail sales operations via custom web portals, and managed mission-critical server environments.

Technical Competencies

Architecture & Backend

Go, PHP, Microservices, Monolith Decomposition, Distributed Systems, Event-Driven Architecture, REST APIs.

Infrastructure & Cloud

Kubernetes, Docker, GCP, AWS, Linux, Coolify, Dokploy, CI/CD, Zero-Downtime Deployment.

Databases & Storage

MySQL, PostgreSQL, ClickHouse, Elasticsearch, Couchbase, Redis.

Open Source & Security

Data Sanitization Packages (Go & PHP), 5651 Law Compliance, Server Benchmarks.