Senior Full-Stack Software Engineer (JavaScript)

S&P Global, Inc.; New York (NY); On-site; USD 150,000 - 225,000; Full time

Benefits offered by this job

Health Insurance

Unlimited PTO

Parental Leave 26 weeks

401(k) with 6% match

Tuition assistance

Snacks and meals

Job summary

Kensho, S&P Global’s AI innovation hub, seeks a seasoned frontend engineer to build full-stack TypeScript apps and SPAs, collaborating on product decisions and architecture. You will mentor teammates, address technical constraints, and drive timely delivery.

We value deep expertise in web frameworks, performance, and design systems, with strong communication and the ability to translate ambiguous needs into solid requirements. Join a collaborative, fast-paced, product-focused team.

Qualifications

• At least five years of direct experience building commercial web applications in JavaScript/TypeScript.
• At least three years of that experience working directly on web UIs in a modern framework.
• At least one domain of deep technical expertise (e.g., web performance, design systems, framework knowledge).
• Product sense, or a strong interest in developing it.
• Kind, thoughtful, and high-signal communication skills for both technical and non-technical audiences.
• Ability to translate ambiguous needs and constraints into clear technical requirements.

Responsibilities

• Build full-stack and SPA TypeScript applications ranging from experiments to flagship products.
• Collaborate on product decisions and communicate technical constraints and considerations.
• Own and collaborate on technology/architecture decisions and conventions.
• Teach and learn from the team and the broader organization via mentorship, code review, knowledge sharing, etc.
• Self-sufficiently manage project priorities, estimates, and deliverables.

Skills

JavaScript/TypeScript

Modern UI framework

Web performance

Clear communication

Requirements translation

Tools

TypeScript

React

Next.js

Tailwind

LangGraph

AI SDK

Drizzle

Git

GitHub

Amazon EKS

AWS

Sentry

Langfuse

Prometheus

Job description

Kensho is S&P Global’s hub for AI innovation and transformation. With expertise in machine learning, natural language processing, and data discovery, we develop and deploy novel solutions to innovate and drive progress at S&P Global and its customers worldwide. Kensho's solutions and research focus on business and financial generative AI applications, agents, data retrieval APIs, data extraction, and much more. At Kensho, we hire talented people and give them the autonomy and support needed to build amazing technology and products. We collaborate using our teammates' diverse perspectives to solve hard problems. Our communication with one another is open, honest, and efficient. We dedicate time and resources to explore new ideas, but always rooted in engineering best practices. As a result, we can innovate rapidly to produce technology that is scalable, robust, and useful. Kensho’s Applications group develops the web apps and APIs that deliver Kensho’s AI capabilities to our customers. Our teams are small, product-focused, and intent on shipping high-quality code that best leverages our efforts. We’re collegial, humble, and inquisitive, and we delight in learning from teammates with backgrounds, skills, and interests different from our own. Our App Experiences team focuses on breathing life into novel ML capabilities, translating them into valuable and intuitive end-user experiences. We collaborate closely with our Product and Design teams to understand user needs, looking for creative applications and delivery mechanisms of our technology. We demo early and often, and we keep a tight iteration loop. We sweat the details when it comes to UX.

What You’ll Do:

• Build full-stack and SPA TypeScript applications ranging from experiments to flagship products
• Collaborate on product decisions and communicate technical constraints and considerations
• Own and collaborate on technology/architecture decisions and conventions
• Teach and learn from the team and the broader organization via mentorship, code review, knowledge sharing, etc.
• Self-sufficiently manage project priorities, estimates, and deliverables

What You'll Need:

• At least five years of direct experience building commercial web applications in JavaScript/TypeScript
• At least three years of that experience working directly on web UIs in a modern framework
• At least one domain of deep technical expertise (e.g., web performance, design systems, framework knowledge, etc.)
• Product sense, or a strong interest in developing it
• Kind, thoughtful, and high-signal communication skills for both technical and non-technical audiences
• Ability to translate ambiguous needs and constraints into clear technical requirements

Technologies & Tools We Use:

• Development: TypeScript, React, Next.js, Tailwind, LangGraph, AI SDK, Drizzle
• Ops: Git, GitHub, Amazon EKS, AWS, Sentry, Langfuse, Prometheus

Benefits & Perks:

• Medical, Dental, and Vision insurance 100% company paid premiums
• Unlimited Paid Time Off
• 26 weeks of 100% paid Parental Leave (paternity and maternity)
• 401(k) plan with 6% employer matching
• Generous company matching on donations to non-profit charities
• Up to $20,000 tuition assistance toward degree programs, plus up to $4,000/year for ongoing professional education such as industry conferences
• Plentiful snacks, drinks, and regularly catered lunches
• Dog-friendly office (CAM office)
• Bike sharing program memberships
• Compassion leave and elder care leave
• Mentoring and additional learning opportunities
• Opportunity to expand professional network and participate in conferences and events

Salary:

Kensho states that the anticipated base salary range for the position is 150k–225k. In addition, this role is eligible for an annual incentive bonus and equity plans. At Kensho, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case.

Equal Opportunity & Diversity Statement:

We are an equal opportunity employer that welcomes future Kenshins with all experiences and perspectives. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.

Location:

Kensho is headquartered in Cambridge, MA, with an additional office location in New York City.

Company Overview:

S&P Global enables businesses, governments, and individuals with trusted data, expertise and technology to make decisions with conviction. We are Advancing Essential Intelligence through world-leading benchmarks, data, and insights that customers need in order to plan confidently, act decisively, and thrive in a rapidly changing global landscape. From helping our customers assess new investments across the capital and commodities markets to navigating the energy expansion, acceleration of artificial intelligence, and evolution of public and private markets, we enable the world’s leading organizations to unlock opportunities, solve challenges, and plan for tomorrow – today.