Senior Staff Software Engineer
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 2d ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 219d ago
The date the source published, not the day we noticed it (2026-03-05). Last seen at its source just now.
We have tracked this listing since 5 Oct 2026 (5 days). The employer's own board has carried it every time we have read it, most recently just now.
Is it remote?
Remote
That is the location the employer filed this posting under. Quoted as written — we do not re-word the source's own location.
Who may apply?
New York City
The description states no restriction of its own. This is the source's own tag.
Pay not stated
Similar roles pay $167.5k–231.5k/yr
Middle 50% of 2264 listings that do state pay — Engineering · Senior · United States · USD/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
-
Ashby employer's own board first seen 5d ago · last seen just now
The listing
About NewtonX
NewtonX is a B2B insights company trusted by the world's 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.
About The Role
We are looking for a Senior Staff Software Engineer with deep expertise in React on the frontend and Python/Django on the backend. You’ll help build and scale high-performing applications used by global teams, with a strong focus on delivering an exceptional user experience. As a Senior Staff Engineer, you will own organization-wide technical initiatives.
What We’re Looking For
6+ years full-stack engineering experience
Strong React skills — modern React (hooks, Context API), reusable component libraries, building robust web apps across multiple projects
Strong Python/Django expertise — Django + Django Rest Framework, designing and consuming REST APIs
Solid experience in JavaScript (ES6+), TypeScript, HTML, CSS/SCSS
Experience building scalable systems (race conditions, idempotency, backpressure)
Strong SQL knowledge with relational databases (postgres)
Unit + integration testing mindset (Jest/React Testing Library, pytest/unittest)
Comfortable with Git and Agile workflowsA strong, demonstrable commitment to developing secure software, including the ability to identify, defend against, and mitigate common application security vulnerabilities, especially those related to the OWASP Top 10.
Bonus Skills (Nice-to-Haves)
State management (Redux, Zustand, Thunk)
Responsive design with Material-UI, Bootstrap, or TailwindCloud + infra experience: GCP, Kubernetes, Docker, Terraform
Messaging/queueing systems (Pub/Sub, Kafka, RabbitMQ, SQS)SOLID design principles
What You’ll Do
Lead development of React-based UIs that are performant, scalable, and user-friendly
Build and maintain Python/Django REST APIs and backend services
Collaborate on architecture, design decisions, and code reviews
Maintain and improve test coverage across the stack
Debug, resolve technical debt, and improve code quality
Contribute to technology/tooling choices and best practices
Mentor teammates and help shape engineering processes
What We Offer
Excellent medical, dental, and vision insurance.
401k match with immediate vesting.
Generous Paid time off: vacation, holidays, sick, and parental leave.
A diverse, collaborative, and positive culture where we invest in and celebrate each other’s success.
Flexible work environment where we work hard but have fun (happy hours, team projects, and 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.