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@mnguyn2

Backend Engineer at Employment Hero who revamped the BYOR query engine and cut report build time by 3× with LLM integration.

Vietnam

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At Employment Hero, I led the architecture and delivery of the Revamp Query Engine (BYOR), replacing the legacy reporting engine with a module-based query architecture. I also helped move BYOR from a monolithic application into a dedicated reporting platform.

I integrated LLM features into the report builder, including context-aware canvas editing, clarification flows, and report autofill, contributing to a 3× reduction in report build time. I also optimized reporting queries, cutting p95 query latency and report load times by over 60%.

At Spartan Technology, I led the production migration from GCP to AWS and built event-driven and MQTT-based services for IoT messaging. Earlier, at Atom Solution, I developed backend modules and REST APIs; at CloudNine Solution, I researched LLM integrations and text-processing workflows.

Experience

Work history, roles, and key accomplishments

Current

Backend Engineer

Current

Employment Hero

Jan 2026 - Present (10 months)

Led the design and delivery of the Revamp Query Engine (BYOR), migrating from a monolithic reporting engine to a dedicated platform. Integrated LLM features into the report builder, optimized query performance, and architected Kafka-based event-driven workflows.

Kafka gRPC Event Driven Architecture Microservices LLM Integrations Query Engine PostgreSQL AWS Docker Terraform CI CD Datadog Sentry Claude Code

Software Engineer

Spartan Technology

Jan 2024 - Dec 2025 (1 year 11 months)

Led full-scale migration from GCP to AWS, designed event-driven IoT processing, and built low-latency MQTT communication. Optimized API performance and refactored CI pipelines to improve reliability and reduce latency.

AWS GCP MQTT Event Driven Architecture IoT SQL CI CD Docker Kubernetes Terraform Cloud Tasks Avro

Software Engineer

Atom Solution

Sep 2023 - Dec 2023 (3 months)

Developed backend modules and REST APIs, optimized database queries and data synchronization. Maintained automated integration tests and CI pipelines for build stability.

REST APIs SQL CI CD Integration Testing Backend Development

AI Engineer (Internship)

CloudNine Solution

Jun 2023 - Sep 2023 (3 months)

Researched LLM integrations and prompt execution patterns for internal analytics tools. Benchmarked output metrics and prepared datasets for context-aware features.

LLM Prompt Engineering Data Preparation Benchmarking