Open to opportunities

Hannah Allen

@hannahallen

Message

Innovative Full-Stack Developer with 10+ years of experience in MERN, Python, and Ruby on Rails.

United States

Message

What I'm looking for

Seeking a challenging role that leverages my expertise in full-stack development, cloud infrastructure, and Agile methodologies to deliver scalable and performant solutions in a collaborative environment.

I am a passionate Full-Stack Developer with over a decade of experience in designing scalable, data-driven applications. My expertise spans the MERN stack, Python, and Ruby on Rails, with a strong focus on building microservices, optimizing cloud infrastructure, and developing robust APIs. I am a strong advocate for test-driven development and Agile methodologies, ensuring high-quality, secure, and performant software solutions.

Throughout my career, I have successfully transitioned between backend and frontend development, delivering high-impact solutions that meet business objectives. My experience includes engineering web applications, optimizing RESTful APIs, and implementing Redis caching for real-time updates. I have led cross-functional teams in Agile sprints, achieving key milestones with high stakeholder approval.

I am committed to continuous learning and fostering collaboration in diverse technical environments. My technical expertise includes a wide range of tools and technologies, from React.js and Ruby on Rails to AWS and Kubernetes. I excel at automating workflows, enhancing system performance, and maintaining high levels of test coverage to ensure bug-free deployments.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Developer

Current

American Express

Jan 2024 - Present (2 years 5 months)

Engineered web applications using MERN stack, Django, and Ruby on Rails, achieving 99.9% system uptime. Built and optimized RESTful APIs and GraphQL endpoints, reducing API response times by 30%. Led cross-functional teams in Agile sprints, delivering key milestones on time with 95% stakeholder approval.

MERN Stack Django Ruby on Rails RESTful APIs GraphQL AWS GitHub Actions Jenkins Redis WebSockets

Backend Engineer

Vicarious

Oct 2018 - Nov 2023 (5 years 1 month)

Architected backend services in Ruby on Rails and Python Flask, increasing system throughput by 20%. Designed and implemented scalable APIs supporting up to 10,000 concurrent users. Maintained 90% test coverage using RSpec, PyTest, and Jest, ensuring bug-free deployments.

Ruby on Rails Flask API MongoDB PostgreSQL RESTful APIs Devise JWT RSpec Pytest Elasticsearch

Full-Stack Engineer

Rapid7

Oct 2016 - Sep 2018 (1 year 11 months)

Developed full-stack solutions using React, Node.js, and Ruby on Rails, boosting application speed by 25%. Automated deployment pipelines with CircleCI, reducing production downtime during releases. Conducted code reviews and mentored junior developers.

React Node Ruby on Rails GraphQL CircleCi PostgreSQL Material UI New Relic JavaScript

Backend Developer

BenchPrep

Feb 2015 - Sep 2016 (1 year 7 months)

Designed and implemented core backend systems using Ruby on Rails, enabling high-traffic e-commerce functionality. Built RESTful APIs for mobile app integration, achieving a 95% reduction in downtime incidents. Collaborated with frontend teams to develop engaging UI components.

Ruby on Rails RESTful APIs Redis SQL JavaScript ERB

Junior Developer

GreenSky

Sep 2014 - Jan 2015 (4 months)

Assisted in developing web applications with Ruby on Rails, focusing on building CRUD functionality. Debugged and optimized SQL queries, improving application efficiency by 15%. Developed unit tests with RSpec, gaining a strong foundation in test-driven development.

Ruby on Rails SQL HTML CSS JavaScript RESTful APIs RSpec Agile

Education

Degrees, certifications, and relevant coursework

Princeton University

Bachelor of Science, Software Engineering

2010 - 2014

Studied Software Engineering, focusing on the principles of software development, algorithms, and data structures. Engaged in various projects that emphasized both theoretical knowledge and practical application in real-world scenarios.