# Alexander Sierra

> Software Engineer | Full-stack JavaScript Developer | React | Next.js | Node.js | TypeScript

Location: Orlando, Florida, United States
Profile: https://flows.cv/alexandersierra

Software engineer with 5 years of experience building JavaScript applications in Next.JS/React/Node. That experience was forged in fire, working in fast-paced startup environments where moving and learning quickly was top priority. Strong experience in integrating third-party platforms, data-driven feature development, building interactive features, and owning projects with ambiguous requirements end-to-end.

## Work Experience
### Software Developer - AI trainer (contract) @ DataAnnotation
Jan 2025 – Present | Remote

### Senior Software Engineer @ Fiveable
Jan 2020 – Jan 2024 | Remote
• Architected and implemented a Stripe payment platform using React/Redux frontend and NodeJS backend, processing over $1M in transactions with 99.9% uptime
• Implemented, maintained, and oversaw regular complex sitewide experiments through our A/B testing framework via Amplitude which heavily influenced company direction
• Designed and built a CMS system for 200K+ practice questions using MongoDB and Google Apps Script, reducing content management time by 60%
• Engineered real-time collaborative note-taking feature using WebSockets and React, adopted by 230K+ user sessions
• Designed and deployed AI content generation pipelines that produced 76K+ content pieces, using Anthropic and OpenAI and vellum.ai for data processing and quality control
• Spearheaded the Stripe payment integration initiative, architecting the solution, leading implementation, and creating comprehensive documentation that became the team standard for payment processing
• Optimized React application for server-side rendering with NextJS, improving initial page load times by 40% and boosting SEO performance
• Enhanced and maintained site reliability through BetterStack monitoring platform, implementing custom alerts and tracking systems to quickly identify and resolve performance issues and user-facing bugs

### Team Lead @ BloomTech
Jan 2020 – Jan 2020 | Remote
• Mentored a team of 10-15 students using Agile methodology.
• Provided live code review for 10-15 students and led feedback sessions on code readability and best practices.
• Designed supplemental projects to aid student comprehension of new programming concepts.
• Led standup meetings to build camaraderie, facilitate the sharing of ideas/work progress, and provide guidance for that week’s study material.
• Taught supplemental lectures on the fundamentals of programming in Javascript for web development.

### Document Imaging Specialist @ University of Rochester Medical Center
Jan 2018 – Jan 2019 | Rochester, New York Area
• Met and exceeded quota of 100 pgs/hr 
• Managed urgent document queue with turnaround time of 1 hour 
• Worked independently with minimal oversight
• Performed quality assurance checks

### Phlebotomy Student @ LabCorp
Jan 2018 – Jan 2018 | Orlando, Florida Area
• Completed 160+ venipunctures
• Complied with specimen labelling guidelines
• Performed duties in compliance with HIPAA
• Utilized butterfly needles and order of draw
• Performed Geriatric draws

### Chief Scribe @ ScribeAmerica
Jan 2015 – Jan 2016 | Orlando, Florida Area
• Managed a team of 7+ scribes 
• Scribed for physicians in radiological, medical, and gynecological oncology
• Trained new scribes in the above fields
• Conducted monthly performance reviews and interviews
• Utilized EMR daily 
• Performed duties in compliance with HIPAA

### Attractions Attendant @ Universal Orlando
Jan 2012 – Jan 2013 | Orlando, Florida Area
• Resolved frequent guest situations
• Operated technical ride equipment
• Trained in Bloodborne Pathogens
• Worked as part of a team communicating time-sensitive information quickly and concisely
• Greeted guests and provided a welcoming, themed atmosphere

### Attractions Host @ Walt Disney World
Jan 2011 – Jan 2012 | Orlando, Florida Area
• Ensured safe ride operation
• Operated heavy machinery
• Troubleshooted mechanical equipment
• Provided world-class guest service

### Specialty Cashier @ Walmart
Jan 2008 – Jan 2009 | Orlando, Florida Area
• Cashiered for the adjacent liquor store under minimal supervision
• Created a catalog of liquor store inventory
• Performed daily cash transactions
• Assisted in stocking shelves


## Education
### Full Stack Web Development
BloomTech
Jan 2019 – Jan 2020

### Bachelor of Science (B.S.) in Health Sciences
University of Central Florida
Jan 2010 – Jan 2015

### 3D Modelling
Udemy
Jan 2018 – Jan 2019

### Phlebotomy Technician/Phlebotomist
Phlembotomy Learning Center
Jan 2018 – Jan 2018

### Instrumental Performance
New York University
Jan 2007 – Jan 2008


## Contact & Social
- LinkedIn: https://linkedin.com/in/alexandercsierra
- Website: https://www.alexandercsierra.com/
- GitHub: https://www.github.com/alexandercsierra

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