Hi, I'm Sean Mercier
A software engineer specialized in building awesome web applications.
Skills
Languages:
Python,
C#,
Java,
MongoDB,
SQL
Frameworks:
Flask,
Entity ORM,
JQuery,
Vue.js
Cloud/DevOps:
AWS (CodeCommit, Lambda, ECS),
Docker,
Kubernetes,
DigitalOcean
Experience
Senior Software Engineer, Connexus Credit Union – Remote Aug 2021 – Present
- Led full-stack feature development of internal Institutional Lending applications using AWS Lambda, Python, Flask, Sanic, C# ASP.NET, SQL, and DocDB
- Architected and implemented a SOAP API wrapper using FastAPI to automate membership creation during loan onboarding, significantly reducing rejection rates and processing time
- Designed and deployed microservices in Python and Kubernetes for automating loan collateral releases, integrating with Snowflake to streamline workflows and eliminate manual steps
- Refactored and migrated legacy applications from an Apache NiFi cluster to AWS, replacing workflows with Python-based Lambda functions to improve performance and scalability
- Drafted architecture for a Loan Sale and Remittance application microservice in AWS
Software Engineer, Skyward Inc. – Stevens Point, WI Jan 2016 – Aug 2021
- Developed and maintained financial reporting systems using C# and SQL, focusing on scalability and maintainability
- Conducted code reviews and mentored junior engineers, emphasizing performance optimization
- Enhanced system reliability by implementing unit tests at the function level
- Established performance standards for State Reporting systems and collaborated with customers on system design and maintenance requests
- Maintained high-performance mass processes for users to perform state reporting maintenance on their data
- Automated software testing processes in C# using Selenium, increasing testing frequency and consistency
- Documented test procedures and software defects, ensuring compliance with company standards
Projects
Joyful Color AI
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Built a Flask-based website to generate coloring book pages using pretrained models from Hugging Face.
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Integrated Auth0 and Stripe for user authentication and payments.
Daily Bread AI (Defunct)
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Developed a Flask and serverless architecture that sent daily SMS messages with AI-generated motivational images and quotes.
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Integrated Twilio API for message delivery and automated user management.
Education
Arizona State University
MCS Master of Computer Science
(Expected Dec 2026)
University of Wisconsin – Oshkosh
BS in Computer Science; Minor: Philosophy
(Jan 2016)