Intermediate Software Engineer - Fullstack
KAST enables global spending of stablecoins through payment cards connected to traditional merchant networks and ATMs worldwide.
Maintainer signals as of 8/14/2026
Funding history
Investors
About KAST
KAST lets users spend stablecoins at merchants worldwide through payment cards connected to traditional networks. The platform supports multiple stablecoins within a custodian wallet system. Users can create digital cards for immediate use with mobile payment systems or request physical cards in various tiers. The service operates in multiple countries to facilitate cross-border digital asset spending.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You design, develop, test, deploy, and maintain front-end and back-end web application components. You deliver medium-to-large features, build APIs and microservices, optimize performance, contribute to CI/CD automation, troubleshoot production issues, collaborate across functions, and support junior engineers.
Requirements
- 3–5 years of experience in full-stack software development
- Proficiency in React, Next.js, Node.js, and Python
- Familiarity with Go
- Understanding of RESTful APIs, microservices, and third-party integrations
- Experience with PostgreSQL or MySQL and familiarity with MongoDB
- Experience with AWS or Google Cloud Platform
- Familiarity with CI/CD pipelines and automated testing
- Understanding of software design, application security, and performance optimization
- Experience using Git and modern version control workflows
- Strong problem-solving and debugging skills
- Familiarity with Agile methodologies such as Scrum or Kanban
Responsibilities
- Design, develop, test, and maintain front-end and back-end components
- Deliver medium-to-large features
- Build and maintain RESTful APIs, microservices, and integrations
- Write clean, maintainable, and well-tested code
- Optimize application performance
- Deploy and maintain applications on cloud platforms
- Contribute to CI/CD pipelines and automation
- Apply security, reliability, and performance best practices
- Collaborate with UI/UX designers
- Translate business requirements into technical solutions
- Troubleshoot production issues and implement sustainable fixes
- Participate in code reviews
- Support and mentor junior engineers
- Contribute to technical documentation
