Senior/Lead Full Stack Engineer (Node.js + React)

Newfire Global Partners is a leading technology firm that specializes in building transformative software solutions for some of the world’s most innovative companies. With a presence across four continents, Newfire Global brings deep expertise in digital healthcare, AI-driven analytics, and enterprise technology. The firm’s track record of delivering scalable, high-impact solutions has made it a trusted partner for organizations seeking to drive meaningful change through technology. We are passionate about the purpose-driven mission to help improve the quality of care for patients and are building a collaborative, innovative, and inclusive culture. We are a fully funded company founded by serial entrepreneurs with a stable client base.

Opportunity for impact
Newfire Global Partners , a leader in developing disruptive healthcare technology, collaborates with Fortune 500 companies and start-ups to drive transformation.

Newfire is seeking a Senior/Lead Full Stack Engineer (Node.js + React )

What's the Project?The first part of the project focuses on enhancing the customer’s web registration and content experience to increase gym enrollment conversion and improve content discovery. The work is primarily front-end focused, with integration points into partner gym systems, and includes rebuilding the registration flow to support simultaneous gym enrollment, expanding bi-directional data sharing with gym partners, improving post-registration personalization, and enhancing search functionality and results presentation.

The second part supports the customer’s Commercial enrollment funnels, which involve greater backend complexity due to payment and subscription handoffs. The scope consists of a series of targeted improvements across landing pages, personalization, feature flagging, and testing infrastructure, including integration with payment and subscription flows, implementation of LaunchDarkly for new commercial features, full automated test coverage for new or significantly modified code, and continued support for WordPress-based content delivery while contributing to the broader transition toward Contentful.

Your day-to-day activities:

- 5+ years of professional full-stack development experience using TypeScript/React and Node.js (7+ years and prior technical leadership experience for Lead).

- Strong experience designing, building, testing, and maintaining scalable backend services and modern web applications.

- Hands-on experience working with WordPress, including custom integrations, APIs, plugins, themes, or headless CMS implementations.

- Experience integrating subscription, billing, or payment platforms, ideally Zuora.

- Experience working with Contentful or a comparable headless CMS.

- Experience implementing LaunchDarkly (or a comparable feature-flagging platform) — not just consuming flags, but structuring feature rollouts, experimentation, and progressive delivery.

- Strong knowledge of REST APIs, system integrations, data flows, and service-oriented architecture.

- Experience working with DynamoDB, Amazon RDS, or similar relational and NoSQL databases.

- Practical experience using AI-assisted development tools for coding, testing, debugging, documentation, and code review.

- Experience working in mature CI/CD environments and contributing to automated build, test, and deployment pipelines.

- Comfort with rapid prototyping, ambiguous scope, and shipping production-quality concept work — the R&D stream demands iterative delivery under evolving requirements.

- Strong understanding of software engineering practices: clean code, automated testing, version control, observability, and secure development.
Experience collaborating with Product, Design, QA, and business stakeholders using tools such as Jira, Figma, Storybook, and Jellyfish.

- Strong communication skills in English and ability to work effectively in a distributed, cross-functional team, with meaningful daily overlap with US