Ruby, Ruby on Rails, Relational DBs, Sidekiq, Rake Tasks, Scripting

Samuel Lesser

***************@*****.*** 201-***-**** linkedin.com/in/samuel-lesser-73861283 github.com/Sambi85 SKILLS

Ruby Rails JavaScript Sidekiq Rake Tasks Minitest RSpec Bash/Shell GitHub GitHub Actions Heroku SQL MySQL PostgreSQL Redis Docker Pandium Datadog AWS S3 SFTP FTP HTML RESTful API ETL OAuth2 Postman Python TypeScript React Redux Next.js WORK EXPERIENCE

Steampunk Remote

Ruby on Rails Developer (Public Trust Clearance) June 2025 - Present

● Improved front-end performance and UX by integrating Turbo Frames and Stimulus, refactoring HTML structure, and modernizing CSS styling — resulting in faster page loads and smoother user interactions.

● Built and maintained custom controllers for Admin and Super Admin dashboards, implementing role-based access control using Devise, and improving data security and separation of concerns.

● Implemented and managed feature flagging using the Flipper gem, enabling safe deployment of experimental features and fine-grained control over admin tooling in production environments. Confidential Client/Stealth Startup Remote

Ruby on Rails Developer (Contract – Equity Only) January 2025 - May 2025

● Reduced API response times by optimizing query performance, implementing caching strategies, and eliminating N+1 queries in high-traffic endpoints.

● Enhanced performance monitoring by adding structured logging and instrumentation for DB queries, API calls, and request cycles.

● Mentored junior engineers through code reviews and support, engaged with pair programming when tackling more complex issues.

Rydership / Whiplash Remote

App Developer II November 2022 – December 2024

● Boosted API performance for 150k+ users by building and optimizing RESTful endpoints (Rails, grape-entity), reducing server load by 3%.

● Improved real-time message handling by truncating Pusher broadcasts and adding Datadog observability, cutting latency 10% in peak traffic.

● Automated database migrations and local/test environments using SQL dumps and GitHub Actions, improving team dev efficiency by 30%.

● Led FTZ V1 (Foreign Trade Zone) integration using Pure Ruby, Faraday, and Pandium, ensuring 100% compliance with government inventory protocols.

● Increased data throughput by 50% by parallelizing paginated GET requests using the Async gem for FTZ ingestion.

● Mentored junior engineers through code reviews and support, improving junior developer PR velocity by 10% and building team confidence.

EDUCATION

Flatiron School Remote

Student July 2020 – October 2020

● Ruby on Rails and JavaScript Bootcamp

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