Open to opportunities

Sean Ormiston

@seanormiston

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Senior Frontend Engineer specializing in React, TypeScript, and high-conversion e-commerce UIs.

Portugal

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What I'm looking for

I seek a senior frontend role focused on product-facing web apps, collaborative teams, technical ownership, and measurable impact on conversions and user experience.

I am a Senior Frontend Engineer with 4+ years building e-commerce and SaaS user interfaces, focused on scalable client-side architecture and cross-functional collaboration.

At Anatta Design I led frontend work on a greenfield storefront for a $21M/year brand, authored reusable React components, delivered a Vue SPA that increased conversions by 22%, and ran 20+ A/B tests to optimize UI for sales.

Previously at Unbabel I spearheaded a SaaS product for translation professionals, migrated frontends across backend APIs with zero downtime during an acquisition, and maintained a component library with full unit-test coverage.

I contribute to open source (notably a next-auth pull request), practice TDD, and enjoy tuning CI/CD, monorepos, and developer workflows. I seek roles where I can drive product impact, mentor engineers, and continue improving customer-facing experiences.

Experience

Work history, roles, and key accomplishments

Senior UI Developer

Anatta Design

May 2023 - May 2025 (2 years)

Built a fully custom greenfield storefront on a 4-month timeline for a $21M/year brand, authored reusable React components, and launched 20+ A/B tests to improve sales conversions; implemented a Vue SPA bundle flow that increased conversions by 22%.

React TypeScript A B Testing CI CD Component Driven Development SCSS Docker Vue.Js

Frontend Engineer

Unbabel

Feb 2022 - Mar 2023 (1 year 1 month)

Spearheaded development of a SaaS product (Pipelines App) for translation professionals and planned a phased frontend migration across backend APIs ensuring zero downtime during a corporate acquisition; maintained a component library with full unit-test coverage.

React TypeScript GraphQL REST APIs Component Libraries Testing CI CD

Frontend Developer

Priberam Informática, S.A.

May 2021 - Feb 2022 (9 months)

Developed interactive UI components for multilingual text editing and instrumentation of NLP tools, authored JavaScript libraries using TDD, and scaffolded dev and production deployments with Docker and Azure.

JavaScript Docker Azure NLP UIs Responsive Design CI CD Test Driven Development