MICHAEL RYAN
Senior Data Engineer, Pipelines & Warehousing
contact@tanmichaelryan.com | Auckland, New Zealand | www.linkedin.com/in/tan-michael-ryan | gitlab.com/tanmichaelryan/

SUMMARY
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Data-focused engineer with 10+ years across digital banking, e-commerce and government
platforms, most recently leading a PostgreSQL-to-BigQuery re-architecture that lifted data
quality from 80% to 92%. Comfortable from schema design to the message broker to the
conversation about which number is right.

SKILLS
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Data: BigQuery, Kafka, PostgreSQL, MySQL, ClickHouse, data quality
Languages: SQL, Python, Go
Platform: GCP, Kubernetes, Docker, Terraform
Practice: data migration, microservices, cost optimisation, monitoring

EXPERIENCE
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Engineering Manager / Tech Lead (Hands-On) (Oct 2022 – Dec 2024)
Govtech Edu Indonesia, Jakarta, Indonesia (Full-time)
- Led a re-architecture from PostgreSQL to BigQuery and implemented a message broker,
  improving data quality from 80% to 92% while reducing latency.
- Led the migration of 500+ databases into a unified system, streamlining 120+ annually
  created databases into a centralised structure.
- Designed and developed microservices for a Self-serve Data Quality Management system
  with BigQuery integration.

Staff Engineer (Feb 2025 – present)
PT Dkatalis Digital Lab, Auckland, remote to Jakarta (Full-time)
- Architected the database layer for a Google Drive–style access management system,
  integrating Ory for auth and authorisation.
- Owned end-to-end delivery of a new payroll system, now live in production and adopted by
  customers.

Engineering Manager (Hands-On) (Apr 2021 – Oct 2022)
Bukalapak.com, Jakarta, Indonesia (Full-time)
- Led the ClickHouse project, reducing MySQL query times from constant timeouts to under 1
  second.
- Led a team of 8 engineers managing the marketplace seller platform at 100–300 RPS using
  Ruby, Golang, and GCP.

Technical Lead (Hands-On) (July 2019 – Apr 2021)
Bukalapak.com, Jakarta, Indonesia (Full-time)
- Led the Facebook Ads Discrepancies project, reducing data mismatches for 400,000
  products from 70% to 20% and driving a 15–18% revenue increase.

Software Engineer (Mar 2017 – July 2019)
Bukalapak.com, Jakarta, Indonesia (Full-time)
- Created 3–5 microservices to replace a monolithic service, improving deployment speed,
  scalability, and fault isolation.

Software Developer (Apr 2015 – Mar 2017)
Liberty Jaya, Jakarta, Indonesia (Full-time)
- Developed and maintained internal tools to support business operations of clients,
  improving workflow efficiency and automation.

PROJECTS
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JsonTool (Active)
Client-side JSON toolkit: beautify, minify, filter, and convert to CSV. Zero dependencies.
HTML, JavaScript

Local LLM Workbench (Active)
Research and testing harness for running and evaluating self-hosted LLMs.
Python, Ollama

Flick (Active)
High-throughput feature-flag service: roll out to a deterministic % of users without a
deploy.
Go, gRPC, REST

EDUCATION
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S. TI (BSc) Computer Science, Bina Nusantara, Indonesia (2011 – 2015)