# Thomas Ernstorfer

> Senior Software Engineer. Fluent in Python, Typescript and most cloud services and data storages.

Location: San Francisco, California, United States
Profile: https://flows.cv/thomasernstorfer

Full-stack Software Engineer with a DevOps background. Main experience on general backend development using software stacks based on Python, JavaScript and AWS.

## Work Experience
### Staff Software Engineer @ Primer.ai
Jan 2025 – Present | San Francisco, CA

### Senior Software Engineer @ Clubhouse
Jan 2024 – Jan 2025 | San Francisco, California, United States

### Software Engineer @ Numeral
Jan 2023 – Jan 2023 | San Francisco, California, United States
* Design and implement ETL processes to transform and represent accounting data.
* Onboarding of new customers through data integration and data pipeline extensions.
* Interface with external stakeholders and gather accounting requirements to automate ETLs. 
* Streamline database management and optimize cloud data costs.
* Implementation of self-serve integrations with Stripe, Shopify, Google APIs.

### Senior Software Engineer @ Magic
Jan 2022 – Jan 2022 | San Francisco, California, United States
* Development of authentication capabilities and SDKs for Web3 using multiple blockchain technologies.
* Implementation of wallet integration using SIWE (Sign-In with Ethereum).
* Enhancement and documentation of private partner APIs.
* Planning for migration and merging of previous products’ code and data into new versions.
* Requirement gathering, architecture and design of technical documents.
* Overall improvements on observability, instrumentation, monitoring and performance of backend systems.

### Staff Software Engineer @ Bain & Company
Jan 2020 – Jan 2022 | San Francisco Bay Area
* Part of the Advanced Analytics Group and Global Engineering organizations.
* Team Lead responsibilities: Sprint planning, agile ceremonies, mentor engineers, communicate with stakeholders, infrastructure reliability.
* Design and implementation of an internal system for software development maturity metrics. 
* Design and implementation of bootstrap project templates, integrated with the previous maturity metrics project.
* Database design and API implementation for a Power Grid Asset Optimization product.
* Developer interviews, survey analysis, and systems evaluation as part of a Digital Transformation
project for a Bank.
* API data analysis, testing and implementation for a Car and Auto Insurance broker.
* Technology used: Docker, Kubernetes, Helm, AWS, PostgreSQL, Python, Django, React, Redux, Terraform.

### Software Engineer @ Yelp
Jan 2017 – Jan 2019 | San Francisco, CA
* Part of the Eat24, Transactions and Business Monetization teams over different time periods.
* Design and implementation of ETL processes to replicate data into Yelp's data warehouse.
* Part of the team that developed a SOA service to gather order feedback for food delivery.
* Development of an A/B testing framework and experiment design for Eat24's search service.
* Migration of internal geocoding usage to partner specific geocoding services.

### Senior Software Engineer @ AltX
Jan 2015 – Jan 2017 | San Francisco, CA
* Application Team Lead. Responsible for gathering requirements, architecture design, sprint
planning for new product features and reducing technical debt.
* Development of frontend and backend components for hedge fund screening, clustering, and
fund performance analytics.
* Replace in-house search system with Elasticsearch.

### Tool Developer @ SKOUT
Jan 2013 – Jan 2015 | San Francisco, CA
* Development of community management tools for internal use. Refactoring, performance analysis and update of existing community management platforms.
* Part of the team developing a new website frontend.
* Development of an internal image cropping service.

### Programming Course Teacher @ Universidad Técnica Federico Santa María
Jan 2011 – Jan 2013 | Santiago, Chile
Introductory programming course for engineering students using the python language.

### Lead Developer / CTO @ Canubring
Jan 2012 – Jan 2012 | Santiago, Chile
* Design and development of a new version of the Canubring.com website.
* Handling of source code control and development guidelines.
* Managed contractors and planning of iterations and use cases.

### Freelance Django Consulting @ OctaneNation
Jan 2012 – Jan 2012 | Santiago, Chile
* Django development and templating of a new design for OctaneNation.com.
* Various bug fixes and system maintenance.

### Software Engineer @ Nimbic
Jan 2011 – Jan 2012 | Santiago, Chile
* Design and development of the nCloud platform for EM circuit simulation over AWS clusters.
* Initial client-server design of Web EM CAD model viewer.

### Scalability Engineer @ SecondSense
Jan 2011 – Jan 2011 | Santiago, Chile
* AWS architecture design for a social audio streaming platform.
* Worked extensively on profiling and optimizing SecondSense's Mahout Slope One Recommender-based discovery service.
* Development of web frontend components.


## Education
### Bachelor's Degree in Informatics
Universidad Tecnica Federico Santa Maria
Jan 2003 – Jan 2010


## Contact & Social
- LinkedIn: https://linkedin.com/in/ternstor
- GitHub: http://github.com/ternstor

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Source: https://flows.cv/thomasernstorfer
JSON Resume: https://flows.cv/thomasernstorfer/resume.json
Last updated: 2026-03-22