Wisaroot Lertthaweedech

Profile Summary

Senior Data Engineer, 9 years across fintech and energy: data platforms, batch and streaming pipelines, and real-time services on GCP across SQL and NoSQL systems. At ABACUS digital, built the cloud landing zone solo (Terraform/Terragrunt, network, IAM, security) and the data platform on top; resilient services cut downtime by ~70%. Turns repeated work into reusable tools: internal Python packages, shared CI/CD patterns, open source projects, all built for maintainability and repeatability.

Experience

Senior Data Engineer

Bangkok, Thailand • Jul 2024 - Present

ABACUS digital

· fintech, SCB subsidiary, Thailand's largest bank

• Built the GCP landing zone solo, as code: Terraform/Terragrunt covering network, IAM, security, and governance. The data platform (BigQuery, Dataflow, Airflow) and its microservices run on top of it.

• Own data platforms, ETL/ELT pipelines, warehousing, and microservices in Python, Go, and SQL on GCP (Pub/Sub, Cloud Run, Cloud SQL, Firestore, Cloud Tasks, Cloud Storage), with AWS integrations.

• Built real-time services (FastAPI, asynchronous processing, 40 req/s peak) as the Elasticsearch gateway, cutting downtime by ~70%; built a Dataflow real-time analytics service (1-2 min freshness) supporting 10-minute loan approval.

• Built internal Python packages to standardize and automate recurring engineering work: a task runner, reusable CI/CD pipelines, versioning automation, Dataflow abstractions, LangChain/LLM interfaces, and an LLM data-discovery prototype (embeddings, vector search) for natural-language queries.

• Applied CI/CD and IaC (GitHub Actions, Terraform, Docker) across data and AI/ML projects: daily deploys, all four DORA metrics up. Mentor engineers and interns; drive code reviews, system design, and test-driven development.

Senior Data Scientist

Bangkok, Thailand • Jul 2022 - Mar 2024

Honest Technology

· fintech

• Owned the production ML lifecycle (MLOps) and hiring. Introduced Markov chain labeling for the credit risk model: AUC up 7%, contributing to a $20 million funding round.

• Built a monadic machine learning framework in Python: development time halved, zero critical incidents.

• Kept the codebase secure and reliable: IaC, CI/CD, testing, and security scanning with Terraform Cloud, GitHub Actions, SonarCloud, and Trivy.

Production Engineer

(software development)

Bangkok, Thailand • Jul 2017 - Apr 2022

Chevron

· oil & gas

• Built Python software for production engineering: linear programming raised oil production 15.2% ($15.3 million/year); pipeline network modeling cut investment costs by $49.8 million. Coordinated cross-functional projects adding $128.5 million in benefits, with zero safety incidents.

Education

Skills

• Programming Languages & Tools: Python, SQL, Go, Rust, TypeScript, JavaScript, Bash

• Cloud & Data Engineering: GCP, Apache Beam/Dataflow, Apache Airflow/Cloud Composer, BigQuery, Pub/Sub, Cloud Storage, Cloud Run, Cloud SQL, Firestore, Cloud Tasks, AWS, Elasticsearch, Databases (SQL & NoSQL), MongoDB, Real-Time & Streaming Data Processing, Batch Data Pipelines, Asynchronous Processing, Distributed Systems, ETL/ELT Workflows

• Infrastructure & DevOps: Python Package Development, Git, Docker, GitHub Actions, Terraform, Terragrunt, Linux, IAM, continuous i­nt­eg­ra­ti­on/d­ep­lo­ym­en­t (CI/CD), Infrastructure as Code (IaC), Trivy, SonarCloud

• AI/ML & Data Science: LangChain, Artificial Intelligence, Machine Learning, Supervised and unsupervised learning, Tree-based models, Time Series, NLP, Neural Network, Deep Learning, Optimization, (I­nt­eg­er/M­ix­ed) Linear Programming, TensorFlow, Scikit-Learn, XGBoost, Optuna, Pandas, NumPy

• Software Development: Design patterns, Functional Programming, OOP, React, Node.js, Streamlit, FastAPI, Test Driven Development (TDD), System Design

• Domain Expertise: Finance, Credit Card, Risk Model, Statistics, Financial Analysis, Oil & Gas Production

• Thai (Native), English (Upper Intermediate, 7 years working in English-speaking teams), Hiring, Mentoring, Project Management

Open Source

bakefile: OOP Python task runner; write tasks once, reuse everywhere (15k+ downloads/​month)

zerv: Rust CLI for git-based versioning; SemVer/PEP 440/CalVer, CI/CD ready (15k+ downloads/​month)

leetcode-py: LeetCode practice environment generator (140 stars, 8k+ downloads/​month)

Awards and Certificates

Google Cloud Certified Data Engineer • GCP Cloud Engineer • CS50x by Harvard University • Machine Learning Specialization by Stanford University • MLOps Specialization by Deeplearning.ai • LangChain • Passed CFA Level I • TOEIC (925/990)

Miscellaneous

• Interests: Minimalism, Getting Things Done (GTD), Yoga, Workout, Mathematics, Physics