Daniel Lemky - Ruby on Rails Software Engineer

Profile

Production Rails experience with product ownership.

Ruby on Rails software engineer with 8+ years building, modernizing, testing, and operating production web applications. Led the large-scale, business-critical migration of a plain Ruby syndication service into an existing Rails application and maintained high-volume real estate data pipelines, public API development, and compliance automation. Founder and product engineer behind a multi-tenant SaaS platform used by paying customers for approximately three years. Experienced in production debugging, third-party integrations, data migrations, infrastructure, and AI-assisted software development.

Technical focus

Core skills.

Ruby & Rails

Ruby, Ruby on Rails, Active Record, Hotwire (Turbo/Stimulus), RSpec, Minitest

Back End & Data

PostgreSQL, SQL, REST APIs, webhooks, background jobs, data pipelines, multi-tenant SaaS

Integrations

Stripe, Twilio, Postmark, Gmail API, Google APIs, AWS S3

Infrastructure

AWS, EKS, Docker, Kamal, Heroku, Cloudflare, Datadog, Git, CI/CD

Frontend, Mobile & Web

JavaScript, HTML, CSS, Tailwind CSS, Hotwire Native (iOS), Hugo, WordPress, PHP

AI & Agent Systems

MCP, LLM tool calling, multi-agent orchestration, AI-assisted development

Experience

Production software, client delivery, and platform ownership.

Founder & Software Engineer

Quantum Fire Labs

2018–Present

Independent consulting and product development

Founded, built, and operate Engage Spot, a multi-tenant Rails SaaS connecting church CRM records, events, forms, subscriptions, two-way messaging, broadcasts, and websites; retained all three paying customers for approximately three years.
Integrated Twilio, Postmark, and Stripe for two-way messaging, verified webhooks, delivery tracking, communication consent, subscription billing, usage tracking, and SMS overages.
Operate Engage Spot using PostgreSQL, Docker, Kamal, Cloudflare, and AWS S3, supported by automated backups, security auditing, migration runbooks, and more than 1,100 automated tests.
Deliver and maintain web applications and websites for long-term clients across healthcare, home services, churches, and nonprofits, managing discovery, architecture, deployment, hosting, security, and production support.
Built Quantum Fire HQ as a shared Rails form backend with schema-driven forms, origin validation, rate limiting, Cloudflare Turnstile, Postmark delivery, and submission tracking.
Built JoyFountain HQ, including an asynchronous video-announcement pipeline using ElevenLabs, Chromium, libvips, and FFmpeg to produce narrated announcement videos used in weekly Sunday services, with live Turbo Stream progress updates.

Software Engineer

MoxiWorks (through SoftMax Data)

2021–2025

Remote

Led the migration of a business-critical plain Ruby syndication service into an existing Rails application, preserving production behaviour through extensive regression testing and compatibility validation.
Maintained Rails and Ruby services supporting MLS listing syndication, agent profiles, and third-party data delivery across North America; diagnosed production issues and contributed public API endpoints, validation, bug fixes, integration support, and documentation.
Inherited an incomplete custom certification test suite for the Anywhere Back Office Management API and took ownership of completing and substantially expanding it across distinct brand-specific syndication feeds; implemented and deployed required sandbox cases covering property states, MLS field mappings, association-specific requirements, business rules, and edge cases.
Automated certification reporting by generating the required CSV results for upload through Anywhere’s developer dashboard, replacing manual case-result entry; led multiple certification cycles that achieved production approval for brand-specific feeds supporting Better Homes and Gardens Real Estate, CENTURY 21, Coldwell Banker, and ERA.

Web Developer

Naylor Association Solutions

2019–2021

Winnipeg and remote

Served as lead developer for Digital Summit, an event platform for large association conferences, building its media library and developing event-registration and checkout workflows while leading implementation, testing, and production delivery.
Developed WordPress and PHP features, custom content workflows, and third-party API integrations across client websites.
Stabilized and maintained legacy systems through refactoring, security and version updates, caching improvements, cross-browser testing, deployment support, and production troubleshooting.

Contract Web Developer

U7 Solutions

2019–2020

Remote contract

Built and maintained WordPress websites across healthcare, nonprofit, immigration, arts, and retail clients, developing custom content workflows and front-end features while improving caching, performance, and production reliability.

Customer Success Representative

Funding Change

2017–2018

Winnipeg

Designed a customer-success lifecycle, managed support operations in Zendesk, and implemented HubSpot for customer tracking and cross-department workflows.

Selected technical work

Systems built for real operational use.

Missionbase

Rails · Hotwire Native · Agent orchestration

Built and operate an internal Rails work-management platform used for client and product work, including tasks, discussions, document sharing, activity tracking, and messaging.

Extended it into a persistent coding-agent control plane with versioned instructions, isolated Git worktrees, retries, capability-scoped tools, and live telemetry, plus a Hotwire Native iOS companion with custom Swift bridges.

Quantum Fire Books

Rails · PostgreSQL · Stripe · Plaid · OFX

Built an idempotent double-entry Rails accounting platform integrating Stripe, Plaid, and BMO/OFX data; automated Canadian corporate accounting workflows and used it to prepare Quantum Fire Labs’ complete 2025 corporate tax package.

BibleJamz

Rails · LLM APIs · FFmpeg · YouTube API

Built and operate a Rails 8 asynchronous media-production system integrating LLM APIs, Suno, Browserless, FFmpeg, and the YouTube API; used it to produce and publish more than 490 song videos.

Volunteer leadership

Long-term team leadership.

Digital Team Leader

Joy Fountain Church

2017–Present

Volunteer

Lead an approximately six-person digital team overseeing the church website and weekly livestream, sound, projection, presentation, and video production; also formed and manage a five-person on-site security team.