Senior Backend Engineer & Tech Lead — Java · Kotlin · Scala · Distributed Systems · Cloud-Native Platforms
I build scalable backend systems, event-driven platforms, and high-throughput payment & fulfillment services — and I'm now expanding into AI engineering and MLOps for developer productivity and observability.
📍 Bangkok, Thailand · 📧 jysan.aziz@gmail.com / jysanaziz2408@gmail.com · 💼 LinkedIn · 🐙 GitHub
Open to senior backend roles in Germany — able to provide my own visa/work permit within 5–8 weeks.
Senior Backend Engineer with 8+ years building production-grade distributed systems across fintech, payments, and e-commerce fulfillment. My core background is in JVM technologies — Java, Scala, Kotlin — with hands-on experience in payments, order management, messaging, observability, and cloud-native infrastructure.
I've designed and operated platforms processing 100K+ daily orders and millions of daily financial transactions at 99.9% availability. Currently, I'm deepening my work in AI Engineering, MLOps, and LLM-powered developer tools, focusing on how AI can improve software delivery, incident response, and observability.
- 🔹 Backend engineer across Java, Scala, Kotlin, TypeScript/Node.js, and Python
- 🔹 Strong focus on distributed systems, event-driven architecture, microservices, and reliability
- 🔹 Building around LLMs, RAG, AI agents, vector databases, and MLOps pipelines
- 🔹 Interested in AI-powered DevOps/AIOps and observability automation
- 🔹 Experienced in technical architecture, project leadership, and mentoring
Languages: Java · Kotlin · Scala · SQL · Python · TypeScript
Backend & Architecture: Spring Boot · NestJS · Hibernate · Apache Camel · REST · gRPC · Microservices · Event-Driven & Domain-Driven Design · Distributed Systems · System Design
Messaging & Streaming: Kafka · RabbitMQ · Google Pub/Sub · AWS SQS · Apache Pulsar
Data & Caching: PostgreSQL · MySQL · MSSQL · Redis · MongoDB · Elasticsearch · OpenSearch
Cloud & Infrastructure: AWS · Docker · Kubernetes · Helm · Terraform
CI/CD & DevOps: GitLab CI/CD · Jenkins · GitHub Actions · ArgoCD · Git · DevSecOps · TDD
Observability: Datadog · Grafana · Prometheus · Kibana · OpenTelemetry
AI Engineering (learning & building): LLM apps · RAG · AI agents · vector search (pgvector, Qdrant) · LangChain / LangGraph · AI-assisted development (Claude, Codex)
Senior Backend Engineer & Tech Lead — CP Axtra · 02/2025 – Present Fulfillment orchestration platform (AO Connector) processing 100K+ daily orders across Thailand & Malaysia; event-driven services on Java, Spring Boot, Kafka, Pub/Sub, and SQS; integrated 8+ enterprise systems; reduced fulfillment incidents by 60%.
Senior Software Engineer — Agoda (Booking Holdings) · 07/2022 – 01/2025 Fintech payout & payment platform handling 1M+ transactions/day; re-architected workflows for 3x throughput; multi-region RabbitMQ with zero-downtime failover; Mastercard B2B integration (50M+ monthly transactions).
Lead Software Developer — Reddot Digital · 05/2020 – 06/2022 TAP digital wallet platform (2M+ monthly transactions); scalable microservices and CI/CD reducing downtime by 50%.
Software Engineer — Robi Vendor Ecosystem · 03/2017 – 04/2020 JBC insurance platform (1M+ customer records); backend services for policy management and underwriting.
AI Incident Investigator — an LLM-powered observability assistant that fetches errors from OpenSearch/Datadog, groups similar incidents, searches codebase context, and generates possible root-cause analysis and fixes.
LLM Gateway / Model Router — a unified gateway across multiple LLM providers and local models, with fallback strategy, semantic caching via vector search, and cost/latency/quality observability.
AI-native backend platforms · developer-productivity agents · AI-powered incident investigation · LLM observability & evaluation · scalable model-gateway architecture · cloud-native MLOps.
📫 Let's connect — LinkedIn · jysan.aziz@gmail.com
Let's build reliable, scalable, AI-powered systems together 🚀