Daniel P. Clark

SR RUBY ON RAILS DEVELOPER

I am a relentless problem solver with a deep passion for crafting high-quality, maintainable, and performant software. My ability to break down complex ideas and communicate them effectively has been honed over years of experience, making me not just a developer but also a mentor and educator. I value clear communication, active listening, and thoughtful collaboration, ensuring that teams I work with thrive in both productivity and camaraderie.

I have a strong foundation in software architecture, prioritizing idiomatic code, best practices, and efficient design patterns. My expertise spans Ruby, Rust, and JavaScript, with a particular emphasis on Rails applications, systems programming, and API design. I am meticulous about writing and optimizing performant code, often using benchmarks, profiling, and testing (unit, integration, and property-based tests) to ensure reliability. My work in Dockerized environments, DevOps, and distributed systems has allowed me to design scalable, secure, and well-orchestrated infrastructures.

Background: My programming journey began as a child, inspired by my father, and later solidified as a passion-driven endeavor in 2001. By 2008, I was freelancing remotely, and in 2014, I transitioned into full-time software development, contributing to both Open Source and professional projects. I’ve worked extensively in high-scale environments, including my tenure at Pearson, where I played a key role in leading, architecting, and optimizing networked applications across Google Cloud, Kubernetes, and AWS.

Ideal Team Environment: I thrive in an environment that is collaborative, respectful, and driven by excellence. A team that values quality over speed, encourages mentorship, and embraces constructive peer review is where I perform best. I believe in graceful feedback, continuous improvement, and writing software that stands the test of time. Above all, I hold to the principle that people come before code, fostering a culture where individuals are valued, ideas are refined through discussion, and technical challenges are met with a spirit of shared problem-solving.

Work History
Headway
1.5 months: March 2025 through May 2025
Senior Software Developer

This was a short-term contract. Collaborated in a high-velocity startup environment, delivering robust features and scalable solutions using Ruby, Ruby on Rails, JavaScript, StimulusJS, Turbo, Tailwind CSS, Flowbite, and Postgres. Recognized as a top contributor for consistently producing clean, maintainable, and performant code. Applied best practices in architecture and code quality, leading to significant improvements in the areas I worked on. Proactively aligned implementations with evolving customer requirements and consistently delivered high-quality results under tight deadlines.

Technologies: Ruby, Ruby on Rails, Stimulus, Flowbite, Turbo, ActiveAdmin, Tailwind CSS

Pearson Accelerated Pathways
5 years, 1 month: October 2019 through October 2024
Lead Web Developer

At Pearson, I had the privilege of working with a small, highly skilled team as a Lead Web Developer, where I played a key role in system architecture, development, DevOps, and mentoring. Our work involved managing a complex ecosystem of interconnected applications, integrating third-party user management systems, and ensuring seamless interoperability across diverse platforms.

Key Contributions & Achievements

Throughout my time at Pearson, I remained committed to solving complex challenges with efficient, secure, and maintainable solutions, contributing to both technical excellence and team success.

Technologies: Ruby, Ruby on Rails, JavaScript, Hutch, Sinatra, AJAX, OAuth, OmniAuth, Devise, CI/CD, Kuberentes, REST APIs, Postgres, RabbitMQ, Stimulus, React, Redis, Google Cloud Infrastructure, AWS Infrastructure, Amazon S3 Bucket, Datadog, MongoDB, Turbolinks, UJS, RSpec, VCR, Kubernetes, Capybara, Selenium, Bash, Sidekiq, Delayed Job, Que, Jenkins, Third Party APIs

Codeship/CloudBees
3 years, 3 months: February 2016 through May 2019
Profesional Ruby on Rails Blogger

Contract work. I have been writing educational blogs for many years at 6ftdan.com, covering programming languages, software development, and personal growth. Additionally, I have freelanced as a technical writer for CloudBees/CodeShip, where I authored articles on various technologies, best practices, and software development methodologies. My writing focuses on delivering clear, insightful, and practical content to help developers enhance their skills and understanding. Blog titles for the subjects I posted are shared further down in my resume.

Undisclosed Start-up
2 years, 1 month: June 2014 through June 2016
CTO & Full-Stack Developer

Led the end-to-end development of a full-stack web application over a two-year period as the sole engineer, architecting and delivering a complex, high-availability platform from the ground up. Built entirely in Ruby on Rails, the application integrated with multiple third-party APIs, social platforms, and contact management systems using OAuth and OmniAuth.

Key responsibilities and achievements:

Technologies: Ruby, Ruby on Rails, JavaScript, jQuery, AJAX, Bootstrap, OAuth, OmniAuth, Devise, ActiveAdmin, Heroku, CircleCI, OCR, Google Contacts API, REST APIs, Postgres

NetVersa ~ 2012

This was a one project contract assignment. I designed full website automation for the sign in process for many social media websites, including Facebook, using Watir and Watir-webdriver in the Ruby language.

Scholar Square ~ 2008

This was a one project contract assignment. Designed a script to pay all site members who’ve authored content; all appropriate fees for student memberships and subscriptions, via the PayPal API using Python.

Featured Projects

Author & Maintainer of Rutie — Ruby & Rust Integration Library

GitHub: danielpclark/rutie

Designed, developed, and actively maintain Rutie, a library that enables seamless interoperability between Ruby and Rust, allowing developers to embed Ruby code in Rust applications or call Rust code from Ruby. Key contributions include:

Author of FasterPath

GitHub: danielpclark/faster_path

With the first release of this project, I improved my Rails site’s page load times by over 30%. Through careful performance analysis, I identified a key bottleneck in a critical Ruby method and rewrote it in Rust for significant speed gains. Over time, I expanded this optimization effort, rewriting 15 core methods in Rust, each contributing to faster execution and improved efficiency across the application. FasterPath continues to demonstrate the power of targeted performance optimizations by integrating Rust for computationally intensive operations within Ruby applications.

Technologies
Ruby
since 2012

Experienced in writing clean, maintainable Ruby code with a strong focus on testing and best practices. Deep understanding of the language; and both RSpec and MiniTest, having used RSpec extensively for Rails applications and MiniTest for developing Ruby gems. Skilled in test-driven development (TDD) and behavior-driven development (BDD), with experience in mocking, stubbing, and integration testing using tools like VCR, WebMock, Capybara, and Selenium.

I’ve also gained much experience in implementing Rust code to interface directly with Ruby’s C API. I’ve worked with many APIs and designed abstraction layers, including API Gateway, Facade Pattern, and Adapter Pattern to simplify their use.

Ruby on Rails
about 8 years experience (since 4.0)

Experienced Ruby on Rails developer, specializing in building and optimizing scalable applications. Skilled in modern Rails features, front-end integration, and backend optimizations.

Rust
since 2015

Experienced in writing performant, idiomatic Rust code with a focus on systems programming, concurrency, and foreign function interfaces (FFI).

JavaScript

Experienced in standalone microservice JavaScript applications running in Docker for both local and production environments. Skilled in integrating JavaScript seamlessly with Ruby on Rails applications, including advanced authentication flows.

Docker
about 10 years experience

Experience in designing and optimizing containerized environments for applications and microservices.

Linux
about 25 years experience

I have grown up with Linux and worked extensively with it throughout my career.

APIs

Extensive experience building, integrating, and consuming APIs, including authentication and third-party service integrations.

Technical Skills
Additional Experience Highlights
Ruby for Good — Volunteer Developer

Contributed to charity-driven Rails development projects, collaborating with teams to build mission-critical applications that support education, conservation, and community-driven initiatives.

Through Ruby for Good, I contributed technical expertise to meaningful projects, ensuring scalability, maintainability, and impact in education and environmental conservation.

The Minitests Cookbook

Chris Kottom authored the book “The Minitest Cookbook” — with three weeks to go until it was due to be published I read through the book twice giving editing advice on each iteration. In 2017 I also gave a final proof read for Chris Kottom’s “Developing Rails API Applications” book.

Rails Rumble – 48-Hour Rails Programming Competition

Participated in Rails Rumble for three consecutive years, collaborating with teams of strangers (or working solo) to rapidly design, develop, and launch innovative web applications within 48 hours.

HSPN

Designed a basketball tournament ranking application which ranked teams on many different criterea. Designed my own flat file database system to keep records in CSV format. This was used to rank a multi-day interstate basketball tournament.

Open Source Contributions
Technical Blog Post Headlines
Spoken Languages
Education

Graduate High School: Clark Christian High School 2003

Contact