Kristen Teo

I am a Senior Full-Stack Engineer with over eight years of experience designing, building, and scaling high-performance platforms across the FinTech, eCommerce, and SaaS industries. My career has been driven by a passion for solving complex problems at scale, creating seamless user experiences, and ensuring the systems I design are secure, reliable, and aligned with business goals.

My technical expertise spans both frontend and backend development, with advanced proficiency in React, Node.js, Python, Java, and modern cloud infrastructures such as AWS and Azure. I have successfully architected microservices ecosystems, engineered event-driven architectures, and delivered hybrid GraphQL and REST APIs that power millions of daily transactions. One of my proudest achievements was leading the development of a global multi-cloud SaaS platform that processed more than three million monthly transactions with 98% uptime, while reducing API latency by 55% and enabling real-time analytics for critical telecom operations.

In addition to technical leadership, I am passionate about building strong teams and fostering collaboration. At Ericsson, Telia, and Klarna, I worked closely with product managers and cross-border teams across the U.S., EMEA, and Asia to accelerate time-to-market by up to 40%. I also take pride in mentoring junior developers, promoting best practices in code quality and testing, and improving delivery rates through Agile process optimization. These experiences have reinforced my belief that technology alone does not create value—people and teamwork do.

I thrive at the intersection of technology and business, always seeking to align engineering solutions with organizational strategy. Whether it’s implementing CI/CD pipelines that reduce deployment cycles from hours to minutes, designing distributed systems with sub-300ms global API response times, or building AI-powered dashboards for predictive insights, I approach each challenge with a balance of technical precision and business awareness.

Beyond coding, I am deeply committed to continuous learning. Holding certifications such as Microsoft Certified: Azure Developer Associate and Certified ScrumMaster (CSM), I stay engaged with emerging technologies and Agile methodologies to bring the best practices into every project.

At the core, I see myself as more than an engineer—I am a problem solver, a mentor, and a collaborator who thrives on delivering meaningful, scalable, and future-ready solutions. My goal is not only to build systems that perform exceptionally today but also to create architectures and teams that will sustain and evolve with tomorrow’s challenges.