Gdańsk, Pomorskie, Poland
Leader, engineer and partner for product with a human face, obsessed with delivering value to users. Passionate about product development, leadership, accessibility, and experimenting. Occasionally, I have weird ideas: https://rafalrumanek.com/
Building the next gen Ads product
User-centric engineering lead, serving high-performing teams responsible for Hotjar’s Voice of Customer product, adopted across SMB, MM, and Enterprise segments. I focus on building sustainable, growth-oriented engineering teams while driving measurable product impact. I’ve overseen initiatives that contributed to stable YoY revenue growth of VoC, delivered first-in-platform AI features, large-scale analytics, launched new VoC formats, and implemented new measurements tracking critical to business eval & success. I owned cross-selling initiatives enabling enterprise deals, expanding adoption from Hotjar to Contentsquare customers. I delivered on compliance features/accessibility standards (WCAG AA, ISO/SOC2). I champion observability, reliability, and delivery efficiency. I steered initiatives reducing cycle time by 75%, MTTD by over 80%. I drive alignment across product and engineering through OKRs, KPIs, design docs, RFCs, and PRDs, while maintaining a sustainable team culture through regular pulse checks, mentoring, and performance management. Core focus areas: Engineering leadership, product partnership with focus on product-led growth, observability, AI adoption, compliance & accessibility, engineering KPIs & team health, career development, recruitment.
Developed Hotjar's Surveys and Feedback tools, enabling real-time user insights and actionable business decisions. - Developed new survey formats, survey configurations, and tracking to measure survey effectiveness, influencing product prioritization. Introduced monetization changes, - Migrated legacy AngularJS codebase to React, improving performance and maintainability, and developed reusable design system components adopted across the product. - Improved product monitoring, contributing to higher reliability and faster detection of issues. Co-led cross-team testing standards initiatives. - Enhanced accessibility compliance, working with external auditors, laying the foundation for certifications that later contributed to customer wins. - Mentored and onboarded team members; actively contributed to cross-team initiatives; worked closely with product managers and designers on building smart compromises. Technologies: React, Preact, TypeScript, ReactQuery, Zustand, AngularJS, Jest, Testing Library, Cypress, Storybook, msw, Axe, styled-components, d3, Wave.
Built and scaled adtech products at Europe’s 2nd fastest growing startup, driving performance, innovation, and business impact across high-traffic marketing platforms. - Developed self-optimizing ad campaigns, traffic purchasing automation tools and cookieless tracking (industry-leading solution anticipating 3rd-party cookie phase-out and privacy regulations), with focus on privacy compliance requirements. - Championed a culture of A/B testing, while owning experiments improving billing flow conversion by 30% and campaign creation completion rates by 40%. - Partnered with product, sales, and support to deliver solutions that boosted MRR, increased deal velocity, supported sales-assisted growth, and reduced churn, - Connected payment methods providers (Braintree, Ingenico) and developed integrations with multiple 3rd party ad traffic sources. - Migrated legacy YUI codebase to Angular, developed a micro-frontend architecture, and design system. - Led initiatives that cut initial load time by 50%, identified and resolved multiple memory leaks, and developed observability, ensuring reliability and near 100% uptime for a platform processing 1+ billion tracking events daily. - Recruited, onboarded, and mentored engineers; ran team ceremonies; developed custom testing infrastructure (unit, e2e, performance) that improved delivery quality. - Created internal admin tools. - Represented the company at meetups and conferences, promoting product and engineering culture. Technologies & tools: Angular, Vue.js, TypeScript, JavaScript, Node.js, AWS, CI/CD (Jenkins, CircleCI), Highcharts, amCharts, TestCafe, Jasmine, Protractor.
1. Project: BI Point - a business intelligence cloud platform Technologies: ASP.NET, Typescript, knockout.js Main responsibilities: - refactoring existing modules and developing new features, - transitioning interface into mobile friendly solution, - creating mock-ups, - analysing client' feedback and their needs.