Hi, I’m Denis (aka Gelerion)
I’m a Principal Software Engineer at Salesforce, based in Israel, and I’ve been building high-performance microservices, streaming data platforms, and AI-powered applications for over a decade.
On this blog you’ll find deep-dives, tutorials and “war stories” about:
- 🚀 Microservices & Architectures (Spring Boot, JOOQ, Kafka, API-Frist, DB-Frist)
- 🔄 Streaming & Lakehouse Architectures (Data Governance, Data Quality, Apache Flink, Iceberg/Delta, Trino)
- 🤖 Agentic AI & RAG (OpenAI, Vector DBs, RAG)
- 📈 Performance tuning & JVM Internals (Profiling, GC-tweaks, Benchmarking)
- 🛠️ Production-Grade Tooling (Terraform, Jenkins, Kubernetes, Argo, Observability)
If you’re curious about scalable systems, low-latency pipelines, or engineering at the intersection of data and AI, you’ll feel right at home here.
A bit more about me
- 🔧 Current role: Principal Software Engineer @ Salesforce
- 💻 Stack: Java 17/21, Spring Boot 3, Spark, Kafka, Kubernetes, AWS
- ✍️ In real life: Husband, father to an eight-year-old, gamer
My design philosophy
“Conventions guide, but never dictate.”
Pragmatic Architecture
Choose practical architectures and tools that deliver clear business value and adapt smoothly as needs evolve.Reliable Data by Design
Data quality, lineage, and trustworthiness aren’t optional—they’re foundational.Performance as a Habit
Make profiling, optimization, and proactive performance tuning integral parts of the development lifecycle.Observability First
Provide deep visibility through logging, metrics, and tracing to continuously improve reliability and speed.
Get in touch
- 🐙 GitHub: github.com/Gelerion
- 💼 LinkedIn: linkedin.com/in/denisshuvalov
Feel free to open issues, send pull requests, or just drop me a line—let’s build something awesome together!
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Thanks for reading!