Jack Daniel Email & Phone Number

United States

United States

At Tally, a leading provider of financial technology solutions, I played a crucial role in the development and optimization of a web-based financial platform. I led the creation of user-friendly interfaces using React.js, Next.js, Angular.js, Vue.js and TypeScript, which significantly enhanced the user experience and increased user retention by 20%. I engineered robust backend services with Java/Spring Boot, Python/Django, and C#/.NET, focusing on scalability and performance optimization.To further improve the platform's performance, I integrated a microservices architecture that reduced system downtime by 25% and ensured high availability. My work on optimizing cloud infrastructure on AWS—utilizing services like EC2, S3, and RDS—resulted in a 25% reduction in system downtime. I also developed and maintained RESTful APIs with Node.js and Express.js, facilitating seamless integration with third-party services.I was deeply involved in implementing agile methodologies, which ensured the on-time delivery of new features and updates. Partnering closely with the DevOps team, I helped establish CI/CD pipelines using Jenkins and Docker, which led to a 30% increase in deployment speed. Collaborating with UX/UI designers, I contributed to a 25% improvement in user engagement by refining and optimizing the platform's user interfaces.

United Kingdom

At Incard, a pioneering company in financial technology, I was responsible for developing and optimizing a robust identity verification system used by over 5,000 businesses and individual customers. I led a team in the frontend development of the platform, using React.js, Angular.js, Vue.js, TypeScript, and Next.js to create and maintain user-friendly interfaces that improved user experience and system accessibility.I designed and implemented backend services with Java/Spring Boot, Node.js, and C#/.NET, focusing on scalability and performance. My integration of a microservices architecture on AWS improved system reliability and decreased downtime by 30%. Additionally, I enhanced security protocols by integrating third-party services such as Veriff and ComplyAdvantage, which resulted in a 30% reduction in fraud cases.To ensure seamless operations, I designed and built RESTful APIs with Node.js and Express.js, enabling smooth integration with various third-party services. My collaboration with the DevOps team led to the establishment of CI/CD pipelines using Jenkins and Docker, which increased deployment speed by 30%. I also implemented unit and integration tests using Jest, Cypress, and Mocha, achieving over 90% code coverage and significantly reducing production bugs.

Romania

At Sensidev, a forward-thinking software development company, I played a key role in developing and maintaining a high-performance web application that led to a 40% increase in the customer base and a 25% improvement in system reliability. I was instrumental in the frontend development, utilizing React and Node.js to create dynamic, responsive user interfaces that enhanced the overall user experience.I engineered backend systems using Node.js and MongoDB, focusing on scalability and data integrity. My integration of third-party APIs facilitated real-time financial data retrieval, significantly improving the platform’s functionality and user value. Additionally, I implemented advanced data visualization features using D3.js and Chart.js, which provided users with clearer insights and a better overall experience.To strengthen security, I implemented authentication and authorization protocols using OAuth, which decreased unauthorized access incidents by 25%. I worked closely with the DevOps team to establish CI/CD pipelines using Jenkins and Docker, reducing software release times by 50% and minimizing production issues by 30%.I also focused on optimizing application performance, resulting in a 30% reduction in page load times and a 20% increase in overall system performance. My role involved managing cloud infrastructure on AWS, leveraging services like EC2, S3, and RDS to ensure high availability and scalability of the platform.

Romania

At Mendelio, a dynamic software development firm, I led the successful transition from a LAMP stack to a MERN stack, which resulted in a 40% reduction in latency and a 20% increase in database administration effectiveness. I spearheaded the development of a single-page application (SPA) using React, Node.js, Express.js, Angular.js, Vue.js and MongoDB, which improved project delivery efficiency by 15% through Agile Scrum methodologies.In addition to developing RESTful clients for consuming data from partner applications, I was involved in creating proof-of-concept (POC) solutions using the MERN stack and enhancing existing REST APIs to ensure smooth and efficient data exchange. I worked closely with a cross-functional team of over 20 professionals, driving a 25% improvement in project execution speed and fostering effective collaboration across disciplines.I streamlined Agile development processes, which led to a 30% improvement in project delivery timelines, ensuring that projects were completed on time and met all client requirements. My efforts in debugging and optimizing web applications resulted in a 99.9% accuracy rate, significantly enhancing the user experience for over 300,000 users.