Daniel Lemky

Software engineer · St Andrews, Manitoba, Canada · Open to remote roles

Daniel Lemky

Ruby on Rails engineer building reliable SaaS, APIs, data systems, and applied AI products.

Software engineer with 8+ years of experience building and modernizing production software. Work spans mature Rails services, multi-tenant SaaS, third-party integrations, data migrations, automated testing, and experimental agent systems.

GitHub LinkedIn Résumé

Experience

Production software used by customers, clients, and established product teams.

MoxiWorks

Software Engineer through SoftMax Data

Owned a business-critical syndication service as its primary engineer for approximately two years, including sole responsibility for a year-long migration from plain Ruby to Rails. Preserved production behaviour through extensive regression testing and compatibility checks while also maintaining listing-data pipelines and public APIs.

Completed and substantially expanded certification coverage for brand-specific Anywhere Back Office API feeds, automated the required CSV reporting, and led multiple certification cycles that achieved production approval for Better Homes and Gardens Real Estate, CENTURY 21, Coldwell Banker, and ERA.

Engage Spot

Founder & Product Engineer

Founded, built, and operate a multi-tenant Rails platform combining contact management, events, forms, member subscriptions, and two-way SMS and email communication. The platform has been in continuous production use since 2023.

Integrated Twilio, Postmark, and Stripe; engineered rerunnable customer migrations with preflight validation and reconciliation; and operate the containerized application with PostgreSQL, Kamal, Cloudflare, and AWS S3. The system is supported by automated backups, deployment runbooks, security auditing, and more than 1,100 automated tests.

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Quantum Fire Labs

Founder & Software Engineer

Build and operate production websites, Rails systems, and shared infrastructure for long-term clients across healthcare, home services, churches, and nonprofits. Own the lifecycle from discovery and architecture through deployment, maintenance, and support.

Naylor Association Solutions

Web Developer

Built a paid conference platform, integrated client systems with third-party APIs, and stabilized legacy production applications through refactoring, upgrades, and testing.

Full résumé ↗

Internal systems & R&D

Tools built for collaboration, operations, and agent-assisted development.

Quantum Fire HQ

Rails · PostgreSQL · Postmark · Cloudflare Turnstile

An internal Rails operations platform for reviewing and managing client-site submissions and coordinating production and staging deployments. Its form service includes schema-driven validation, origin checks, honeypots, rate limiting, Turnstile verification, Postmark delivery, and submission lifecycle tracking.

Missionbase

Rails · PostgreSQL · Hotwire · Agent orchestration

A work-management platform used for client work, project collaboration, and AI-assisted development. Its agent control plane coordinates runs through tasks and messages, versioned instructions, provisioning, renewable leases, retries, capability-scoped tools, isolated Git worktrees, and live execution telemetry.

Quantum Fire Mail

Rails · Gmail API · Google Pub/Sub · MCP

A Gmail-backed email client with incremental synchronization, threaded drafts, scheduled delivery, provider-side label sync, and nine agent-accessible MCP tools.

Quantum Fire Books

Internal financial system · Rails · PostgreSQL · Stripe · Plaid · OFX

An internal Rails 8 accounting platform built around an idempotent double-entry ledger. It normalizes Stripe, Plaid, and BMO/OFX data into balanced journal entries and automates GST/HST reconciliation, financial statements, and Canadian corporate tax schedules. The system was used to prepare Quantum Fire Labs’ complete 2025 corporate tax package.

Pi Remote

Pi extension · Local broker · Progressive web app

A private mobile interface for live Pi coding-agent processes. It streams semantic agent and tool activity, routes commands to the correct terminal session, and supports remote prompts, steering, voice, images, and notifications without moving the agent runtime to a server.

Technical focus

Core technical strengths.

Rails applications

Feature development, service modernization, production debugging, and maintainable architecture.

APIs & integrations

Public APIs, webhooks, Stripe, Twilio, Postmark, Google APIs, and failure-aware workflows.

Data reliability

Rerunnable migrations, reconciliation, regression suites, compliance validation, and PostgreSQL.

Applied AI systems

Tool calling, agent orchestration, persistent state, sandboxing, and deterministic guardrails.

Contact

Send a message.

For software engineering roles, project collaboration, or questions about my work.