Leonid Yakovlev Email & Phone Number

Russia

Remote

High-Load Telegram Mini App Development:- Led the development of a high-load Telegram Mini App, ensuring stable and efficient performance under heavy user traffic.- Optimized application performance and scaled the system to support millions of users daily.- Implemented advanced technologies and best practices in React and Node.js to enhance user experience.Analytical Platform for Telegram:- Developed an analytical platform for Telegram to collect, process, and analyze data for informed business decisions.- Integrated data visualization tools to provide actionable insights for marketing and product teams.- Ensured data accuracy and integrity through rigorous testing and validation processes.Team Leadership and Collaboration:- Collaborated with cross-functional teams to implement new features and improve existing functionalities.- Mentored junior developers and promoted knowledge sharing within the team.- Coordinated with DevOps to streamline deployment processes using Docker and Kubernetes.Key Achievements:- Successfully launched an application serving over 3 million users monthly.- Reduced system response time by 40% through backend and database optimization.- Designed a scalable architecture that maintained system resilience during peak loads.- Implemented analytical tools that provided valuable insights, boosting user engagement by 25%.Technologies and Tools:Languages and Frameworks: JavaScript, TypeScript, React, Node.jsDatabases: PostgreSQL, RedisInfrastructure: Docker, Kubernetes, AWSOthers: Telegram API, WebSockets, RESTful APIs

Served as the Tech Lead at Lumi Tarot, a startup specializing in immersive 3D experiences.Led the technical development of Lumi Tarot's immersive 3D tarot experience.Technical Innovation Leadership: - Developed and implemented innovative technical solutions in the tarot domain, ensuring the product met customer needs. - Directed a team of developers and designers, overseeing architecture design, coding standards, and software development processes. - Integrated advanced 3D technologies to enhance user engagement and overall experience.Collaboration and Cross-Functional Leadership: - Coordinated with product management and marketing teams to align technical capabilities with business objectives. - Contributed to brand development by ensuring technical feasibility of marketing strategies and promotions.Support in Successful Sale: - Provided technical insights during negotiations with potential buyers. - Prepared comprehensive technical documentation and facilitated due diligence processes.Result:Played a pivotal role in developing and launching Lumi Tarot's immersive 3D product, contributing to the startup's successful sale and achieving key business goals.

Remote

Architectural Innovation:Designed and implemented a groundbreaking architecture using micro frontend module federation technology, resulting in a 40% improvement in development speed.Significantly reduced codebase complexity by 50%, enhancing maintainability and scalability.Performance Enhancement:Enhanced platform speed and user interface, leading to a 25% increase in the usage time metric for trading operations.These improvements directly contributed to an 8% increase in company profits.Documentation and API Development:Created comprehensive documentation and REST API interfaces for seamless communication with the backend.Results:My innovative approach to architecture, performance enhancements, and meticulous documentation significantly contributed to the success of the organization.

Created examples, and guides, improved documentation, performed at conferences as a speaker, improved the blog and participated in the development of open source libraries. Increased the metric of unique users by +10% every month.Improved the storage infrastructure and automated CI/CD flow: examples, our sites, guides. Using AWS and GitHub Actions tools, we managed to reduce maintenance costs by 50%.

Moscow

Reduced the complexity of the code base, increasing the development speed of the frontend team by 15%I trained two employees from junior to middle level, which allowed the company to save on hiring up to 20% of the annual salary of developers.

Cheboksary, Chuvashia, Russia

Reduced the company's product development time by switching from Twig to Nuxt.js. The template integration stage was removed, which allowed the company to increase its profit from each project by more than 20%.

Cheboksary, Chuvashia, Russia

Created a news portal for our athletes. More than 10.000 people visit it every month.Built a network between departments that allowed them to transfer files between each other 100% faster using an internal LAN within the organization.Protected the internal network from possible hacker attacks.