The engineering leadership you've been looking for.

Swarzy provides consulting to select clients. Talk to us to enhance how you build your websites and mobile apps.

Swarzy Services

Website Architecture
Swarzy builds websites. We build using Node.js, Bun, and Next.js. We have experience with a variety of web application stacks including Express.js, Ruby on Rails, and WordPress, etc. In the old days, we built websites in Perl, PHP, and Java/JSP. (Don't ask about Mason.)
Front-End Engineering
Swarzy knows HTML, CSS, and JavaScript, like you wouldn't believe. Node.js and TypeScript are what we do. We've used React since the early days, and Next.js is a favorite. We've been playing with Bun a lot recently, too.
Web Performance Optimization
Swarzy knows web vitals and web performance. We can help you optimize your web performance by analyzing web vitals and experience-specific metrics. We'll make recommendations to help get your latency down and meet customer speed expectations.
Mechanisms
Swarzy drives improvements by defining and enforcing standards for engineering, performance, metrics, monitoring, reporting, deployments (CI/CD), and interviewing. We train and mentor engineers to help them grow and deliver similar successes.
Cloud
Swarzy has experience building websites in the cloud (AWS, Google Cloud Platform, Azure), and we're fans of Fly.io and Vultr for small sites.

Leadership

Cal Freitas is the CEO of Swarzy where he offers his services as a website and app consulting expert.

Cal has 17 years of industry experience including 9 years at Amazon. Since 2020, he has done projects for Microsoft and startups in full-time, contract, and consulting roles.

From Mar. 2023 to Jan. 2025 he was an Engineering Manager at PublicSquare where he led the PublicSquare marketplace engineering teams including its website (with 1,000+ merchants integrated and hundreds of thousands of products), apps (iOS and Android), and back-end services (Node.js and Kotlin).

Cal Freitas (in front of plane engine)

Client Stories

Cal Freitas joined the RedBalloon team from December 2022 to February 2023 for a critical project. During the project, he updated the homepage, navigation, search, and other core user experiences. See showcase »

In 2022, Cal Freitas rebuilt Anedot's integrations feature as part of a migration from a Ruby on Rails front-end to React.js with a Rails API. The new UI supported 30+ integrations at launch, and made it much simpler for the product team and engineering team to add new integrations. See showcase »

Partners

Vantage International LLC

Cal Freitas has led multiple engineering projects for Vantage International to architect, build, and deliver website solutions for clients. On these projects, he has assembled development teams, managed engineers, architected websites, and ensured successful completion and delivery of new website features.

Cal led web performance assessments and contributed to User Experience reviews for leading Eastern European e-commerce shopping sites (eMag and Pigu).

Connect with Swarzy

Contact us »Email Swarzy

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