Sr. Java Script/SDK Engineer

As a Senior JavaScript/SDK Engineer at AdPushup, you will be responsible for engineering our core JavaScript product, a high-performance script that optimizes ad delivery and layout in real-time on customer websites. Your key responsibilities will include: - Owning the design and development of the client-side JavaScript engine - Collaborating with Product, Revenue, and Ad Ops teams to build revenue-driving features - Participating in LLD and HLD discussions for frontend and backend initiatives - Performing code reviews and driving engineering best practices - Troubleshooting and resolving production issues across browser and server environments - Mentoring junior engineers and guiding them on technical architecture and performance tuning - Contributing to improving development processes, automation, and observability - Supporting project management efforts to ensure high-quality, timely delivery of initiatives Qualifications required for this role include: - 6 - 10 years of experience in frontend-focused product engineering - Mastery of JavaScript, especially vanilla JS and modern browser APIs - Expertise in designing resilient, high-performance client-side code - Experience with Node.js and Express.js, as well as proficiency in TypeScript and modern ES6+ JavaScript practices - Deep understanding of web security, HTTP protocols, and cross-browser compatibility challenges - Knowledge of system design principles, code versioning tools, and CI/CD workflows - Bonus if you have exposure to Java, Docker, ReactJS, SQL Server, or NoSQL databases AdPushup offers a challenging work environment where your code directly impacts real revenue on live websites. You will have the opportunity to grow into a Staff Engineer role by demonstrating ownership and technical leadership. Additionally, you will enjoy a culture that values transparency, autonomy, and learning, collaborate with talented peers, and have the flexibility to work from home. Join AdPushup if you are passionate about browser internals, JavaScript performance, and designing scalable systems.,