Senior Frontend React Engineer

About NewtonX

NewtonX is a B2B insights company trusted by the worlds most innovative companies to make high-stakes decisions with confidence. We combine a verified network of business professionals with AI-powered research tools to deliver research intelligence faster more precise and more defensible than traditional methods.

Our clients include Google Microsoft TikTok DoorDash Stripe and Coinbase. Our research has been cited by Fortune Forbes TechCrunch Adweek and the Wall Street Journal.

NewtonX has raised $47M from investors including Two Sigma Ventures Third Prime XFund and Citi Ventures.

The Role

As part of NewtonXs growing Medellín engineering hub youll design and build the fast reliable modular user interfaces that power our research platform sophisticated web applications reusable component systems and data-rich experiences built on top of our APIs. Youll work on a small fast-growing engineering team (under 40 engineers) where individual contributors get in early and help shape the direction of our technology.

This role partners closely with US-based engineering leadership and cross-functional teams. Fluency and confidence in English written and verbal is essential youll participate in technical reviews planning and design discussions with colleagues across time zones.

What Youll Own

Engineering & Delivery

• Design and develop modular reusable production-grade UI components and applications.

• Build performant responsive web interfaces that consume RESTful APIs and handle real-time data-heavy views.

• Contribute to solution design and participate actively in code review with other engineers.

• Perform debugging resolve tech debt and drive continuous code quality improvement.

• Uphold engineering standards across code review testing documentation and CI/CD hygiene.

Technical Contribution & Growth

• Help evaluate and influence the adoption of new technologies languages tools and frameworks.

• Weigh in on architectural decisions with an eye toward scalability and maintainability.

• Pair program and mentor junior engineers as part of a growing local team.

Cross-Functional Collaboration

• Work closely with Product Design and US-based Engineering leadership on priorities and platform direction.

• Communicate clearly and proactively across time zones bridging any gaps between the Medellín and US teams.

• Participate in Agile/Scrum ceremonies and translate business priorities into well-scoped engineering work.
  

What Were Looking For

Required

• 5 years minimum experience as a software engineer with strong React experience across multiple projects (tech stack: React TypeScript modern frontend tooling).

• Hands-on experience developing web applications that consume REST APIs.

• Experience with client-side state management and asynchronous data handling (e.g. React Query Redux or similar).

• Strong command of HTML CSS and responsive cross-browser UI development.

• Comfortable working with modern frontend build and deployment pipelines (e.g. Vite Webpack or similar behind CI/CD).

• Excellent English proficiency clear confident communication in writing and in cross-functional meetings with US-based leadership.

• Bachelors degree or greater.
  

Nice to Have

• Strong SQL experience with a common relational database; experience tuning PostgreSQL performance.

• Familiarity with cloud infrastructure and horizontally scalable systems (GCP Kubernetes Terraform Cloudflare or infrastructure-as-code).

• Full Stack Experience (Ideally in Python).
  

Why Join NewtonX

• Frontier B2B AI: Work on infrastructure powering the most sophisticated research and decision-making workflows in the world.

• High ownership from day one: Get in early on a growing regional team with real influence over technical decisions.

• Exceptional traction: Strong product-market fit with the worlds largest investment banks hedge funds and consulting firms.

• World-class team: Work alongside smart driven people who are passionate about their craft.

• Growth opportunity: Join during a hypergrowth phase with a clear path to greater scope as the Colombia team scales.
  

What We Offer

• Full Time contract according to Colombian legislation (not a contractor position).

• Competitive compensation and equity aligned to the Medellín market.

• Excellent medical dental and vision insurance.

• Generous paid time off holidays and parental leave.

• A diverse collaborative and positive culture where we invest in and celebrate each others success.

• Flexible work environment where we work hard but have fun (happy hours team projects and global retreats).

NewtonX is proud to be an equal opportunity workplace. We do not discriminate based upon race religion color national origin sex sexual orientation gender identity/expression age status as a protected veteran status as an individual with a disability or any other applicable legally protected characteristics.

Required Experience:

Senior IC