Sr. Java Script / SDK Engineer

JavaScript / SDK Engineer

About the Company : AdPushup

is an award-winning ad revenue optimization platform and a Google Certified Publishing Partner (GCPP), helping hundreds of web publishers grow their revenue using cutting-edge technology, premium demand partnerships, and proven ad ops expertise. Our team is a mix of engineers, marketers, product evangelists, and customer success specialists, united by a common goal of helping publishers succeed. We have a work culture that values expertise, ownership, and a collaborative spirit.

About This Role : This is a

Senior JavaScript Engineer

role with expertise in Vanilla JS. This is an Individual Contributor (IC) role.

Unlike typical UI-focused frontend positions, this role centers around engineering our core

JavaScript product -

a high-performance script that runs on customer websites . You will work at the intersection of browser internals, web performance, and backend services, designing systems that handle billions of impressions per month.

Your Day-to-Day Responsibilities :

Own the design and development of our client-side JavaScript engine that optimizes ad delivery and layout in real-time

Collaborate closely with Product, Revenue, and Ad Ops teams to identify and build new revenue-driving features

Participate in

LLD (Low-Level Design) and HLD (High-Level Design)

discussions for frontend and backend initiatives

Perform code reviews and drive engineering best practices

Help troubleshoot and resolve production issues across browser and server environments

Mentor junior engineers and guide them on technical architecture and performance tuning

Contribute to improving our development processes, automation, and observability

Support project management efforts and ensure high-quality, timely delivery of initiatives

You Should Have : 6 - 10 years

of experience in frontend-focused product engineering, with strong contributions to production systems

Mastery of JavaScript , especially

vanilla JS

and

modern browser APIs

(closures, prototypal inheritance, DOM manipulation, event loop, async patterns)

Expertise in designing resilient, high-performance client-side code (not just UI components)

Experience with

Node.js

and Express.js, comfortable working on backend APIs when needed

Proficiency with

TypeScript

and modern ES6+ JavaScript practices

Deep understanding of

web security , HTTP protocols, and cross-browser compatibility challenges

Solid knowledge of system design principles, including scalability and performance trade-offs

Familiarity with code versioning tools (Git / SVN) and modern CI / CD workflows

Bonus : Exposure to Java, Docker, ReactJS, SQL Server, or NoSQL databases

Why Should You Join AdPushup?

At AdPushup, you’ll :

Work on technically challenging problems where your code runs directly on thousands of live websites, impacting real revenue

Be part of a fast-moving product company where engineering decisions matter and are felt immediately

Grow into a Staff Engineer role as you demonstrate ownership and technical leadership

Enjoy a culture that values transparency, autonomy, and learning

Collaborate with talented peers who appreciate clean, high-quality engineering

Get flexibility to work from home—we care about results, not just hours

Have access to catered lunches, plenty of snacks, and a supportive environment

Experience direct, honest communication across the company

Next Steps

If you’re passionate about

browser internals, JavaScript performance, and designing systems that scale , we’d love to hear from you. This is an opportunity to

own the technical direction of our core product,

while fast-tracking your career growth.