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Sean GilbertsonSG
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Sean Gilbertson

@seangilbertson

I build reliable full-stack products, billing systems, and scalable backend infrastructure.

United States
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What I'm looking for

I'm seeking a collaborative team building meaningful, impactful products where I can apply full-stack systems, backend infrastructure, architecture, and AI-assisted development workflows.

I've led full-stack product and pricing-platform development at SingleFile, including a zero-downtime subscription price migration with deep Stripe synchronization. I build production-safe billing, payment, and customer-facing workflows that reduce operational toil and improve reliability.

Previously, I built APIs, web applications, and infrastructure at Understood.org and BuzzFeed, including Wunder's Python, MongoDB, Tornado, Kubernetes, and Fastly-based API and BuzzFeed's Infinite Quizzes feature, which delivered millions in annual revenue. I use Python, Django, React, TypeScript, cloud infrastructure, and AI-assisted workflows to turn complex business requirements into durable systems.

Experience

Work history, roles, and key accomplishments

Understood logoUN

Senior Software Engineer

Feb 2019 - Apr 2024 (5 years 2 months)

• Led the design and construction of a Python-, MongoDB-, and Tornado-based API for the MVP and eventual full public release of our app, Wunder, featuring robust Fastly-based caching capabilities. This API is a microservice that lives in our mono-repo, and is deployed as a Docker container within Google Cloud Platform (Kubernetes). I also debugged and contributed bug fixes to the React Native-base

Understood.org logoUN

Senior Software Engineer

Feb 2019 - Apr 2024 (5 years 2 months)

Led the design and construction of a Python-, MongoDB-, and Tornado-based API for the Wunder app, featuring robust Fastly-based caching. Expanded backend capabilities by integrating new features into an existing Django-based API, and architected foundational Python-based backend services and React-based frontend code for the main website.

BuzzFeed logoBU

Senior Software Engineer

Feb 2015 - Feb 2019 (4 years)

• Worked full-time with Python, Node.JS, React, and Perl in a full-stack capacity. All projects were microservice Docker containers hosted in AWS, deployed via our custom pipeline, and monitored in Datadog and automatically tested via Jenkins. Back-ends were built using either Python (typically with Tornado), Node.JS, or Go. Front-ends were built using React, with some early projects using Javascr

Tinderbox logoTI

Creator

Feb 2018 - Nov 2018 (9 months)

Created the Tinderbox service (http://tinderbox.ninja) for extracting web content (e.g. news articles, blog posts, and Reddit threads — including images) and delivering it to users’ Kindle devices. The service features a best-in-class algorithm for extracting web content from any source without any assumptions regarding format or structure. Launched Tinderbox to the public in the fall of 2018.

Target logoTA

Senior Software Engineer

Jun 2014 - Oct 2014 (4 months)

• Maintained and enhanced backend services and website for the Cartwheel application using Java and Spring Framework.
• Created internal and external API endpoints for access to discount catalog and user- tailored discount recommendations.

Ackmann & Dickenson, Inc. logoAI

Software Engineer

May 2012 - Jun 2014 (2 years 1 month)

• Designed and implemented a web application using Rails & jQuery that transformed the management of complex HVAC systems, incorporating a proprietary algorithm that automated power settings to optimize costs and user comfort.
• Spearheaded the development of a sophisticated Rails application to streamline the execution of large-scale pay & management surveys for hospitals, achieving this within a

American Public Media Group / Minnesota Public Radio logoAR

Software Engineer

Jun 2009 - May 2012 (2 years 11 months)

• Led the development of two major versions of Source, a public-facing Ajax-driven web application, managing news sources' relationship with the Public Insight Network (PIN).
• Developed two major versions of a Gmail-like web application for searching, viewing, and annotating inquiry responses from the PIN's sources.

CaringBridge logoCA

Software Engineer

Dec 2007 - Jun 2009 (1 year 6 months)

• Led the engineering effort for two major versions of software, utilizing Zend Framework and MySQL, that transformed users' personal websites into hard-cover "CaringBooks" and PDF files.
• Maintained and improved prior Java Struts and Perl versions of the site, demonstrating adaptability across multiple programming languages and frameworks.

BWBR Architects logoBA

Software Engineer

Oct 2005 - Dec 2007 (2 years 2 months)

• Maintained and improved existing architectural project management software, demonstrating skills in software maintenance and improvement.
• Created two major versions of a dynamic ASP.NET 2.0 web application that interfaced with the main Exchange software to provide aggregate viewing, and editing, of staff calendar information.

Financial Recovery Services logoFS

Software Engineer

Dec 2003 - Oct 2005 (1 year 10 months)

• Co-designed and independently wrote a comprehensive scheduling, time-clocking, and payroll system using PHP and PostgreSQL.
• Saved the company $1M annually by designing a new workstation for collectors. End product allowed collectors to interact with centralized software on thin clients, minimizing licensing needs.

Florida Institute of Technology, Software Engineering Lab logoFL

Software Engineer

Jan 2000 - Jan 2003 (3 years)

• Designed and created an end-user network security Windows program which provided an intuitive means for users to have real-time control over which processes had access to certain resources (e.g., specific files, network communication). This application was later sold for further development.
• Helped design and implement an application that provided software testers with tools to simulate enviro

Education

Degrees, certifications, and relevant coursework

UM

University of Minnesota

Computer Science

2005 - 2005

FT

Florida Institute of Technology

BS, Computer Science

1998 - 2002

Florida Institute of Technology logoFT

Florida Institute of Technology

Bachelor of Science, Computer Science

Bachelor of Science in Computer Science from Florida Institute of Technology, completed in 2002.

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