Cold Hearth

Software engineering consultancy · Hillsboro, Ohio

Mobile, web and backend software, built to keep running.

Cold Hearth builds and modernizes the apps your customers use and the systems behind them: React Native apps for iOS and Android, React and Next.js front ends, and .NET, Node.js and Python services on AWS.

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Services

One engineer who has shipped across the whole stack, from the phone in a user's hand to the database behind it.

Mobile apps

Cross-platform React Native apps for iOS and Android, from first screen to App Store and Google Play release. In-app purchases and subscriptions, Redux or Zustand state, and test suites that keep releases calm.

Connected devices

Apps that talk to hardware. Real-time control over WebSockets and Protobuf, telemetry and GPS, remote commands, and interfaces that adapt to whatever equipment is on the other end.

Web applications

Fast React and Next.js sites and apps, with headless CMS content (Contentful, GraphQL) so your team can publish without a developer.

APIs and modernization

Moving legacy systems onto clean REST APIs. .NET microservices with Entity Framework, stored procedures rewritten to LINQ, Node.js and Python (Django, Flask) services, and SQL Server, PostgreSQL, MySQL or MongoDB underneath.

Cloud and delivery

Serverless backends on AWS Lambda, API Gateway and S3. Docker and Kubernetes, and CI/CD on Jenkins or Azure DevOps that turns releases into a routine weekly event.

Quality and accessibility

Jest, React Testing Library and XUnit coverage where it matters, reusable component libraries with light and dark themes, and WCAG-minded accessibility from the start.

The kind of work behind it

Cold Hearth's founder has built production software in some demanding places.

  1. Recent

    Recreational equipment manufacturer

    A React Native smart-control app that builds its screens from each unit's hardware configuration and controls climate, lighting, tanks and diagnostics over a real-time WebSocket and Protobuf link.

  2. Recent

    Health care staffing

    Software engineering for a health care staffing company.

  3. Connected-vehicle mobile apps

    React Native apps for a major automaker's brands, with vehicle telemetry, GPS tracking and remote commands, backed by a Jest suite at 90% coverage.

  4. State title system modernization

    Migrated a public-safety agency's legacy API to REST, launched a faster lookup API, and moved the team to weekly CI/CD deployments on .NET.

  5. Company web platform

    Rebuilt a software company's site on React and Next.js with Contentful and GraphQL, on a serverless AWS backend with containerized deployments.

About

Cold Hearth LLC is an Ohio software engineering firm founded and run by Dawson Eakins, a full-stack developer with a B.S. in Computer Science from Franklin University and years of production work across mobile, web, government and automotive software.

You work directly with the engineer writing your code. No hand-offs, no account managers, and plain answers about scope and schedule.

Read Dawson's full background →

Languages
TypeScript, JavaScript, C#, Python, SQL
Mobile
React Native, iOS, Android, store releases, IAP
Web
React, Next.js, GraphQL, Contentful
Backend
.NET, Entity Framework, Node.js, Django, Flask
Cloud
AWS Lambda, API Gateway, S3, Docker, Kubernetes
Delivery
Jenkins, Azure DevOps, Git, TDD, Agile

Have a project in mind?

Tell us what you are building or what needs fixing. You will hear back from Dawson directly.

[email protected]