Description

Senior software engineer with 11+ years building backend systems, distributed architecture, and AI-powered products across commodity trading, fintech, and SaaS.

I specialise in the hard parts: the failing data pipeline under load, the authentication layer that needs to work across a dozen services, the LLM integration that has to stay fast and reliable in production, the architecture decision that will shape everything built on top of it.

I work across the full delivery chain: Python, Kotlin, Go, Java on the backend; Kafka, PostgreSQL, Elasticsearch, and vector databases for data; AWS, GCP, Kubernetes for infrastructure; React, Vue, and Flutter when the frontend needs me. On the AI side, I build with LLM APIs (OpenAI, Anthropic), design RAG pipelines, and integrate AI agents into existing systems where they have to actually work - not just demo well.

I've cut processing time by 40%, designed shared libraries adopted across 8 microservices, and shipped real-time fraud detection systems where latency and accuracy both matter. I bring the same engineering rigour to AI features: production-grade, observable, cost-aware, and built to handle the messy edge cases that break most prototypes.

I operate independently, make critical technical decisions, and treat every system I touch - AI or otherwise - as if I'll be the one maintaining it.

Industry field of expertise

Languages

Vietnamese
Native or bilingual
English
Fluent
Dutch
Basic
German
Basic

Workplace preferences

Remote only

Primarily works remotely

MTT-Solutions
Freelance Software Engineer (Remote)
DIGITAL AND IT
August 2025 - Today (10 months)
- Delivered new features and high-impact improvements to a document management Flutter app by hardening core data/sync workflows, stabilizing release pipelines to App Store, Android PlayStore, and Microsoft Store. Strengthening integration quality, reducing CI/CD disruptions, preventing data defects, and accelerating dependable feature delivery.

- Built and shipped integration handler configs, admin tooling, and an automated smoke test suite for a production Spring Boot / OData v4 connector linking a product data management system to an enterprise ERP platform, resolving key-mapping defects and expanding test coverage, improving integration correctness and delivery confidence.

- Introduced AI-assisted development workflows to accelerate CI/CD delivery
Flutter Spring boot Java API Continuous integration
Trafigura
Freelance Senior Backend Engineer (Remote)
LOGISTICS AND SUPPLY CHAIN
February 2025 - February 2026 (1 year)
London, United Kingdom
- Operated as a senior technical contributor across multiple domains simultaneously - security, data pipelines, domain services, and architecture for a greenfield project.
- Designed and implemented a shared authentication and authorisation library adopted by 8 backend services across the platform. This established a single security standard that teams could easily use in their domain microservices.
- Stabilised a failing document and data ingestion pipeline and extended the voyage management domain with new lifecycle capabilities that improved data quality for downstream analytics.
Python FastAPI Amazon Web Services Design System PostgreSQL
Arcual AG
Freelance Senior Backend Engineer (Remote)
ARTS AND CRAFTS
October 2023 - February 2025 (1 year and 4 months)
Zurich, Switzerland
- Designed and improved an event-driven backend architecture for a new art exhibition platform (similar to Shoppify but for the art exhibition industry). The backend was a distributed system covering microservices in accounts, pricing, payments, and exhibition history.
- Made the foundational technical decisions that impact the whole systems

- Went beyond the immediate project scope to improve the Elasticsearch and Kafka libraries shared across the whole company, raising the quality and consistency.
Apache Kafka Elasticsearch Kotlin Distributed Architecture Spring boot