Luis Semprun Email & Phone Number

Germany

Berlin, De

Berlin, Berlin, De

Led all customer-facing product engineering groups, comprising over 150 engineers, and drove key initiatives both before and after achieving product-market fit. Focused on making economic growth more accessible and equitable through innovative product development.* TR Card: Oversaw the complete development and launch of TR’s Visa Debit Card, providing users the opportunity to spend non-invested funds while enjoying a 1% 'saveback' and round-up investments.* TR redesign and refactoring (TR 2.0): Led a company-wide initiative which increased user engagement, reduced customer support tickets, and, most importantly, paved the way for TR’s transformation from a brokerage firm to a full-fledged bank.* Fractional Bonds (a world first): Attracted new user group and increased assets under management.* Accrued interest rates on uninvested cash: Reduced customer churn and increased investment activity.* Personalized watchlists: Increased user engagement (e.g., time spent on app, number of instrument details views) and investment activity.* Portfolio analytics: Improved user satisfaction (e.g., CSAT scores) and helped users make more informed investment decisions.* Trending topics (TR's custom ETFs): Increased overall assets under management and improved user diversification.

Berlin, Berlin, De

Led the creation and growth of 2 new groups (Portfolio & Discovery and TR Card), expanding from a small team of engineers to over 50 across multiple teams. These groups significantly increased user engagement and investment-related KPIs.Key initiatives and contributions to the overall Engineering org:* Rolled out a “Better Story Sizing for Agile Teams” framework across multiple teams, resulting in significant improvements in capacity planning and roadmap accuracy.* Developed a structured 90-day onboarding program for new engineering managers.* Mentored numerous individual contributors in transitioning to management roles.* Organized TR’s inaugural Hackathon to foster creativity and collaborative problem-solving.

Berlin, Berlin, De

Joined Moebel24/HomeTiger at the MVP stage and contributed to making it a success story backed by top-tier VC firms; currently working with partners such as Ikea, Wayfair, and Otto to bring the widest selection of home furnishings to millions of monthly users in Germany and France.* Established and grew the engineering organization from the ground up, assembling a distributed team of 40+ engineers with offices in Berlin and Kiev, and talent spread across Europe.* Developed a scalable and robust technological foundation to support a rapidly growing marketplace, now serving millions of monthly active users.* Successfully pivoted the business model from lead generation to an online marketplace, which now generates over 50% of the company’s revenue.* Enhanced profitability after reaching scale and market fit. This involved a comprehensive refactoring and modernization of our data processing systems. We achieved further financial and operational efficiencies by migrating to a multi-region Kubernetes cluster, optimizing the use of reserved instances, and utilizing off-cloud dedicated server resources for batch processing.

Berlin, Berlin, De

Within a year, I turned a simple idea into a successful software service company with a dedicated team focused on optimizing client websites for speed and profitability.* Architected, managed, and developed “Jetscale’s Real User Monitoring” (RUM) platform, the star of our service offering. I built the RUM system from the ground up, using Golang for the backend to handle and process large volumes of real-time data from users’ browsers. This data is stored in ClickHouse, enabling quick and insightful analysis through a custom-built UI that our team and clients use to improve web performance and user experience.* Built and led a distributed team of engineers, promoting a culture that prioritized innovation and focused on delivering solutions tailored to our clients’ needs.* Collaborated closely with clients, providing consultancy and executing tailored strategies to improve core web vitals, such as speed and overall user experience.

Hamburg , Hamburg, De

Savings United is the leading coupon partner of premium media companies, helping smart shoppers find the best deals for their online shopping. We work alongside our media partners to create custom coupon platforms that align with their branding and values, while providing a seamless and engaging shopping experience for their users. SU was acquired by Pepper.com, the world's largest shopping community.* Led the engineering and product teams at SU, through a period of rapid growth and expansion* Oversaw the development and implementation of scalable systems that enabled the team to deliver faster and continuously while keeping up all internal and external service level agreements (SLAs)* Managed the engineering and product integration process for two company acquisitions (MT-Performance and Global Leads Group)* Led the pivoting from developing our own branded websites to a revenue share strategy with leading publishers in our markets such as The Guardian, CNN, Newsweek, The Telegraph, ABC and Focus

Berlin, Berlin, De

Founded and scaled one of Latin America’s fastest-growing healthy lifestyle online magazines with the goal of promoting wellness and healthy living. Grew the readership to over 2 million monthly visitors within 6 months of market launch. Acquired by one of the top advertisers.

MT Performance (aka: Latin American Media Group) is the opinion-leading lifestyle brand in online publishing reaching millions of Latin American readers every month. Operating over 200 premium properties across 7 countries, a high-performance Ad server & network, Latin America's leading content brokering platform, and a wide range of online stores.Led the team behind WorldOfEditors, our flagship content platform, guiding it from concept to launch with thousands of active users in the first year. Oversaw platform development, ensuring scalability, security, and reliability. Partnered with stakeholders to align engineering with business goals and implemented agile practices.

Led a team of around 20 engineers focused on building our Demand, Supply, Content Marketplace, and Blog network products.

* Increased banner ad slot Click-Through Rate (CTR) by 60% by refining the contextualization algorithm and implementing a multi-score position auction system.* Boosted ad creative/media processing speed by 5x and significantly reduced infrastructure costs by rewriting a set of Python scripts into a multi-threaded C service.

* Enhanced backlink acquisition velocity by developing a suite of automation tools. These tools streamlined tasks such as identifying relevant websites, scoring them based on SEO metrics, and reaching out to website proprietors.* Led a substantial uptick in team productivity by creating a comprehensive link-building management system encompassing validation, acquisition, reporting, and progress tracking functionalities.

ALG mission is to provide fast, reliable, and professional locksmith services and lockout assistance throughout the U.S. When joined, ALG had more than 100 lead generation websites targeting a wide range of cities.* Led on-page SEO initiatives for the ALG's website portfolio, achieving significant improvements in search engine visibility and organic traffic.* Contributed to a significant uptick in team productivity by architecting and developing an intuitive, custom CMS.

GigaSites provides an intuitive platform for non-technical individuals to design and oversee visually appealing personal and business websites.

Developed a diverse range of websites and applications, primarily tailored for real estate agents and branches in the US market, to strengthen their online presence and streamline their business operations.