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The Intermediate Software Engineer - Fullstack plays an important role in building and scaling KAST. This role is ideal for engineers who have developed strong technical fundamentals and are ready to take ownership of medium-to-large features while collaborating closely with cross-functional teams.
You will contribute across the full software development lifecycle - from design and implementation to deployment and production support. You'll work alongside senior engineers to build scalable systems, improve engineering practices, and deliver high-quality software that supports KAST's growth.
This role is for engineers who are proactive, eager to learn, and capable of working independently while knowing when to seek guidance. You'll be expected to continuously improve your technical skills and contribute to a collaborative engineering culture.
- Department
- Engineering
- Employment Type
- Full Time
- Location
- Colombo
- Workplace type
- Hybrid
Responsibilities
- Design, develop, test, and maintain both front-end and back-end components for web applications using technologies such as Go, React, Next.js, Node.js, and Python.
- Independently deliver medium-to-large features while collaborating with senior engineers on complex technical solutions.
- Build and maintain RESTful APIs, microservices, and integrations with third-party services.
- Write clean, maintainable, and well-tested code following engineering standards and best practices.
- Optimize application performance to ensure responsive user experiences and reliable backend services.
- Deploy and maintain applications using cloud platforms such as AWS or Google Cloud (GCP).
- Contribute to CI/CD pipelines and automation to improve development efficiency and deployment reliability.
- Follow security, reliability, and performance best practices throughout the software development lifecycle.
- Collaborate with UI/UX designers to build responsive and intuitive user interfaces.
- Work closely with product managers and engineering leads to translate business requirements into technical solutions.
- Troubleshoot production issues, perform root cause analysis, and implement sustainable fixes.
- Participate actively in code reviews, providing constructive feedback while continuously improving code quality.
- Support and mentor junior engineers through knowledge sharing and collaboration.
- Contribute to technical documentation and help maintain engineering standards.
Qualifications & Skills
- 3–5 years of experience in full-stack software development.
- Strong proficiency in React, Next.js, Node.js, and Python.
- Familiarity with Go or willingness to learn and contribute to Go-based services.
- Good understanding of RESTful APIs, microservices, and third-party service integrations.
- Experience working with relational databases such as PostgreSQL or MySQL, and familiarity with NoSQL databases such as MongoDB.
- Experience working with cloud platforms such as AWS or Google Cloud Platform (GCP).
- Familiarity with CI/CD pipelines and automated testing practices.
- Understanding of software design principles, application security, and performance optimization.
- Experience using Git and modern version control workflows.
- Strong problem-solving and debugging skills.
- Ability to communicate effectively and collaborate within cross-functional Agile teams.
- Familiarity with Agile development methodologies such as Scrum or Kanban.
Bonus Skills
- Experience with Go.
- Exposure to Web3 technologies, blockchain development, smart contracts, or decentralized applications (DApps).
- Experience with serverless architectures such as AWS Lambda or Google Cloud Functions.
- Familiarity with GraphQL APIs.
- Experience with Infrastructure as Code (Terraform or CloudFormation).
- Experience using monitoring and logging tools such as CloudWatch, Datadog, or ELK.
About KAST
KAST is redefining stablecoin banking for global citizens, crypto professionals, Web3-native businesses, and high-inflation markets hungry for USD-backed banking. Backed by top-tier global investors and led by the ex-APAC CEO of Circle, our leadership team spans Circle, Airwallex, Revolut, Wise, Grab, Zoom, AWS, and leading OTC desks. We’ve scaled from zero to nearly a million users at ridiculous speed.
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Our Hiring Process
Stage 1:
First Technical Interview
Stage 2:
Second Technical Interview
Find out more
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What does a React developer in web3 do?
A React developer in the context of web3 is a developer who is using the React JavaScript library to build user interfaces for decentralized applications (dApps) that run on the Ethereum blockchain
These dApps often use smart contracts to facilitate transactions and other interactions on the Ethereum network
Overall, the role of a React developer in web3 involves using your skills in React development to help build cutting-edge decentralized applications that leverage the power of the Ethereum blockchain
As a React developer in web3, some of your responsibilities might include:
- Integrating the dApp with the Ethereum blockchain. This might involve using tools like web3.js and Ethers.js to connect to the Ethereum network and interact with smart contracts.
- Building the user interface for a dApp using React. This could involve creating components for the various elements of the dApp, such as buttons, forms, and other input elements.
- Implementing features that are specific to decentralized applications, such as handling cryptocurrency transactions and displaying data from the blockchain in a user-friendly way.
- Collaborating with other members of the development team, such as blockchain engineers and designers, to ensure that the dApp functions properly and meets the needs of the end users.