Sammy S.

Sammy S.

Zurich, Switzerland
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About Me

Sammy is a Senior Fullstack Engineer and Developer Experience ambassador with over 13 years of experience specializing in React, TypeScript, and Node.js. He is a dedicated test automation advocate with deep expertise in Cypress, Playwright, and Jest. Throughout his career, Sammy has delivered complex solutions for high-stakes industries, ranging from building financial trading platforms at Goldman Sachs to healthcare systems at Semble and tax automation dashboards for Fonoa. His technical versatility spans GraphQL, AWS microservices, and Next.js, complemented by a strong background in UX design and usability testing to ensure that highly technical backends remain intuitive for the end user.

Frontend

Backend

Database

DevOps

QA & Testing

Workflow

Agile (Scrum) GitHub Actions GitHub Actions Git

Other

Work history

Semble
Senior Fullstack Engineer
2025 - 2026 (1 year)
Remote
  • Contributed to improving form handling and data validation across patient-facing features.

  • Worked on both frontend and backend systems, including patient scheduling interfaces and clinical workflow tools.

  • Integrated with third-party healthcare services.

Asset Reality
Senior Fullstack Engineer
2024 - 2025 (1 year)
Remote
  • Built features for asset tracking dashboards, case management workflows, and reporting tools.

  • Worked on improving the reliability of cryptocurrency wallet integrations and transaction monitoring displays.

  • Developed a digital asset management platform used by law enforcement and government agencies.

Gartner
Senior Frontend Engineer
2024 - 2024
Remote
  • Built document management features & components, search and filtering interfaces.

  • Worked on internal tools and client-facing platforms used by analysts and enterprise customers.

  • Worked on enterprise-facing applications within a large frontend codebase.

Waterbridge
Senior Frontend Engineer
2022 - 2024 (2 years)
Remote
  • Built UI features including map-based views, scheduling calendars, filtering and search tools, and drawer panels for detailed record views.

  • Worked on their H2OBridge platform, which handles water logistics and scheduling for field operations.

  • Contributed to the internal component library shared across the product.

Fonoa
Senior Frontend Engineer
2022 - 2022
Remote
  • Built features for tax returns workflows and invoice generation.

  • Worked on the customer dashboard where users manage invoices, view tax calculations, and handle supplier data.

  • Worked on improving form validation and error handling across the application.

Goldman Sachs
Key Senior Full-Stack Engineer
2019 - 2021 (2 years)
Remote
  • Played a key role in building a webapp that provides a platform for traders to find and purchase financial structured products.

  • Built a user-friendly and intuitive interface that allows customers to quickly and easily browse and purchase financial products that suit their needs.

  • Built a robust and scalable website using a variety of technologies and best practices.

React TypescriptGraphqlNext.jsNode.jsSubscriptions WebSockets Schema stitching Apollo Federation JestEnzymePuppeteer SeleniumSentryContenful GraphQL API Snowplow Superset
AAA Insurance
Sr. TypeScript Node.js Engineer
2019 - 2019
Remote
  • Integration layer between the front-end facing app to the backend insurance policy quoting service.

  • Segment for analytics.

  • Backend development for primary insurance quoting tool.

Inside labs
Sr. Full-Stack TypeScript Engineer
2018 - 2019 (1 year)
Remote
  • Development of the Inside Laax mobile app & a custom-built engagement & campaigning tool.

  • Full-Stack JavaScript & TypeScript Development in React + React Native + Apollo + Node.js + Redux + REST + MongoDB.

  • Used Braze & Segment for analytics

ScienceLogic
Senior Full-Stack Engineer
2018 - 2018
Remote
  • Full-Stack Development in Node.js + React + Redux + Apollo.

  • Rebuilt the main customer-facing product of ScienceLogic used for IT maintenance & monitoring.

  • Primary client using the tool is Cisco among others.

Swissquote Bank
UX Front-End Developer
2017 - 2018 (1 year)
Remote
  • Created a company-wide React component library that introduced best practices in functional programming.

  • Improved conformity and alignment with the latest brand identity.

  • Conducted usability tests and heuristic evaluations of prototypes.

Parfumania Cosmetics
Senior Lead Full-Stack Engineer
2013 - 2017 (4 years)
Remote
  • Developed a custom ERP solution.

  • Supervised software development (managing a team of 4 developers).

  • Finance tools (cash-flow forecasting/management, credit risk overview).

AWSPHPVanilla JavaScript
Ozzit Creations
Full-Stack Engineer
2009 - 2012 (3 years)
Remote
  • Developed various widgets in PHP for website urbanite.pk, fixed bugs & errors, as well as general code clean-up.

  • Worked on Facebook apps using Facebook PHP API.

  • Freelance work for this company during my 4 years as a university student.

Showcase

Senior Frontend Engineer - Fonoa (via UpStack)
Senior Frontend Engineer - Fonoa (via UpStack)
  • Assisted Fonoa, an online service automating taxes for companies like Uber, by working on products related to automated invoicing, tax calculations, returns automation, and supplier management.

  • Utilized React, TypeScript, Next.js, Tailwind, react-intl, and react-query in crafting performant and user-friendly UIs.

  • Introduced improvements to the codebase provided by relevant developer-experience tooling, besides feature development.

Key Senior Full-Stack Engineer - Goldman Sachs
Key Senior Full-Stack Engineer - Goldman Sachs
  • Completed a Greenfield project aimed at creating an aggregation platform for trading structured products. The platform was developed using React + Apollo, ElasticSearch, MongoDB, Kafka, and Snowplow.

  • Introduced notable features like a rewards program, competitor products, product comparison algorithms, and complex searching filters. Developed Apollo automated mocks for better workflow among teams.

  • Incorporated integrations with Sentry error-reporting, Contentful GraphQL API, Docker & Kubernetes. Implemented Continuous Integration/Continuous Deployment with GitLab.

Senior Full-Stack Engineer - Ordnance Survey public website
Senior Full-Stack Engineer - Ordnance Survey public website
  • Senior Full-Stack Engineer led the creation of company website and e-commerce store for Ordnance Survey Ltd, transitioning from Magento to BigCommerce

  • Managed the design and implementation of the whole web architecture for the project

  • Technologies used encompass React, TypeScript, JavaScript, BigCommerce, Azure Functions, Azure Event Grid, Cosmos DB, Apollo Server, GraphQL, DataCash, WorldPay

Sr. Full-Stack TypeScript Engineer - Inside labs internal dashboards and multi-tenant React Native app
Sr. Full-Stack TypeScript Engineer - Inside labs internal dashboards and multi-tenant React Native app
  • Involved in full-stack JavaScript & TypeScript Development in React + React Native + Apollo + Node.js + Redux + REST + MongoDB, integrating with Braze & Segment for analytics.

  • Implemented an automated validation system for graphql schema against the codebase and graphics files.

  • Imposed testing and scraping frameworks (Jest, Enzyme, Pupetter) and Sentry error-reporting, Contentful, along with CI/CD using CircleCI.

Education

Education
Digital Enterprise Management (HBA)
University of Toronto
2008 - 2012 (4 years)