Senior Software Engineer Fullstack

The Senior Software Engineer - Fullstack plays a key role in building and scaling KAST. This is a high-ownership position where you’ll take responsibility for meaningful work from day one, collaborate closely with cross-functional teams, and help turn ambitious goals into real-world outcomes. Your mission is to move fast and raise the bar. You’ll operate in a dynamic, high-growth environment, navigate ambiguity with confidence, and contribute to systems, products, or processes that scale with the company. Quality matters, speed matters, and ownership is non-negotiable. This role is for builders, people who take initiative, think in systems, and care deeply about doing great work. If you’re excited about working at the intersection of technology, execution, and impact, you’ll feel right at home at KAST. Application Deadline June 30, 2026 Department Engineering Employment Type Full Time Location Singapore Workplace type Hybrid Responsibilities Oversee the design and development of both front-end and back-end components for web applications using technologies such as Go, React, Next.js, Node.js, and Python. Lead the creation of scalable, high-performance systems by implementing best practices in software architecture and design. Guide the development and maintenance of RESTful APIs, microservices, and integrations with third-party services. Focus on optimizing application performance for fast load times, smooth user interactions, and minimal downtime. Collaborate with the team to deploy, scale, and manage applications using cloud platforms like AWS and Google Cloud (GCP). Lead the implementation of CI/CD pipelines and automation tools to streamline deployment and improve development efficiency. Ensure application security, performance, and reliability by adhering to best practices and continuously monitoring applications. Work closely with UI/UX designers to translate wireframes and prototypes into responsive, user-friendly interfaces. Collaborate with the product team to transform user requirements into robust technical solutions. Lead the team in maintaining and troubleshooting applications after deployment to ensure smooth and continuous operation. Troubleshoot and solve complex technical challenges. Participate in and oversee code reviews to ensure adherence to high-quality standards and mentoring junior developers to foster their growth. Write and maintain comprehensive technical documentation for software projects to ensure clarity and continuity in development. Qualifications & Skills 5-6 years of experience in full-stack development with a strong background in leading teams and managing complex technical projects. Proficient in React, Next.js, Node.js, and Python. Experience with modern web technologies and frameworks. Experience in blockchain development, smart contracts, decentralized applications (DApps), and Web3 technologies is a big plus. Extensive experience working with cloud platforms like AWS or GCP, including using services such as S3, EC2, Lambda, Cloud Functions, and more. Strong understanding of RESTful APIs, microservices, and their integration with third-party services. Solid experience with both relational (e.g., MySQL, PostgreSQL) and NoSQL (e.g., MongoDB) databases. Proven experience setting up and maintaining CI/CD pipelines to automate testing, deployment, and integration. Strong leadership skills with the ability to guide teams and foster collaboration between developers, designers, and product managers. Deep understanding of best practices for application security, performance, and reliability. Experience with Agile methodologies, including Scrum and Kanban, and the ability to lead the team in an Agile environment. Expertise in Git and modern version control workflows. Bonus Skills: Web3 development experience. Familiarity with serverless architecture (e.g., AWS Lambda, GCP Cloud Functions). Experience with GraphQL APIs. Understanding of infr...