Staff Frontend Engineer / Web Performance Architect

RTB House; Remote; PLN 180,000 - 240,000; Full time

Job summary

A leading marketing technology firm is looking for a Staff Frontend Engineer to lead the design and implementation of frontend solutions, optimizing performance for ad displays. The ideal candidate has 12+ years of experience in software engineering, strong analytical skills, and a passion for web performance. The position offers fully remote work, collaboration with a self-sufficient team, and hardware tailored to your preferences.

Benefits

Flexible working conditions

Collaborative interdisciplinary teams

Tailored hardware and software

Qualifications

• 12+ years of hands-on software engineering experience, specializing in Web Performance.
• Architectural expertise in scalable frontend and full-stack architectures.
• Deep practical expertise in optimizing Core Web Vitals.

Responsibilities

• Design and lead implementation of frontend and full-stack architectural solutions.
• Optimize Core Web Vitals metrics for ad rendering.
• Provide technical leadership and mentorship to other engineers.

Skills

Web Performance

Frontend Architectures

Analytical Thinking

Job description

Staff Frontend Engineer / Web Performance Architect

Location: Poland (Remote)

We Are:

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Our proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to achieve outstanding results and meet their goals at every stage of the funnel.

The Bidding Platform organization is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. The Ad Display is an important area of that platform, which we now seek Staff Frontend Engineer for. The job will be to lead (technically) the design and implementation of frontend and full-stack architectural solutions that will guarantee the seamless, high-quality, and reliable display of our advertisements. The position is to collaborate closely with the Ad Display team, and across multiple other functional and platform teams within the Bidding Platform and beyond. The position will be reporting either to one of the Bidding Platform Sr.Managers or directly to the Bidding Platform Director.

You Will:

• Design and lead implementation of a frontend and full-stack architectural solutions that guarantee extreme performance, scalability, observability for displaying Ads world wide.
• 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.

Desired Experience:

• 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).
• Data-Driven Optimization: Proven strong analytical thinking and experience using Real User Monitoring (RUM) and synthetic tools to diagnose and solve complex performance issues.

Nice to Have:

• Experience in the AdTech/Real Time Bidding space or in developing Real User Monitoring systems.
• Experience influencing projects that span multiple platforms (Web, Mobile, CTV).

We Offer:

• 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.

Apply now!

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