RTB House

Staff Frontend Engineer – Web Performance Architect

RTB House

full-time

Posted on:

Location Type: Remote

Location: Poland

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Job Level

Lead

Tech Stack

JavaScriptReactTypeScriptWebpack

About the role

  • Design and lead implementation of a frontend and full-stack architectural solutions that guarantee extreme performance, scalability, observability for displaying Ads worldwide.
  • Optimize “Core Web Vitals” metrics, driving significant, measurable improvements in critical user performance metrics (LCP, INP/FID, CLS) for ad rendering and display.
  • Provide Hands-On Technical Leadership. Serving as the senior technical authority, solving the most complex system challenges, proactively addressing bottlenecks, and ensuring the implementation of the highest coding standards.
  • Architect and oversee advanced monitoring (RUM and Synthetic) systems to track crucial metrics like reliability, viewability, and latency at massive scale, providing deep debugging insights for ad creation teams.
  • Establish and evangelize on technical standards, tooling, and deployment methodologies (A/B testing, Canary deployments) across teams, while providing technical mentorship to elevate the skills of other engineers in performance and architecture.
  • Work intensely with Ads Layouts teams (designers, graphic specialists) and core Bidding Platform backend teams to ensure architectural alignment and optimal data flow for performance.

Requirements

  • 12+ years of hands-on software engineering experience, specialising in at least one area out of: Web Performance, RUM, Frontend Architectures, including at least 2-3 years spent in a Principal or Staff Engineer level (technical leadership path).
  • Architectural Expertise: Proven track record of designing, maintaining, and evolving scalable frontend and full-stack architectures for high-scale systems (millions of users/requests).
  • Web Performance Architect: Deep and practical expertise in optimizing Core Web Vitals and advanced loading techniques (caching strategies, Service Workers, Edge Computing/CDN utilization).
  • JavaScript/TypeScript Mastery: Expert proficiency in the JavaScript/TypeScript ecosystem and modern frameworks (e.g., React), including build tooling (e.g., Webpack, Vite) and optimization.
  • Data-Driven Optimization: Proven strong analytical thinking and experience using Real User Monitoring (RUM) and synthetic tools to diagnose and solve complex performance issues.
Benefits
  • Projects focused on extreme performance and high code quality – solid code reviews are our standard.
  • Collaboration within an interdisciplinary, self-sufficient team where your architectural vision will be critical (including DevOps, database experts, backend developers, product designers, and QA engineers).
  • Hardware and software tailored to your preferences (e.g., MacBook, AI tool licenses).
  • Flexible working conditions – no core hours, fully remote cooperation possible.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
frontend architecturefull-stack architectureweb performance optimizationCore Web VitalsJavaScriptTypeScriptReactcaching strategiesService WorkersEdge Computing
Soft Skills
technical leadershipanalytical thinkingmentorshipproblem-solvingcollaboration