Kunai builds full-stack technology solutions for banks, credit and payment networks, infrastructure providers, and their customers. Together, we are changing the world’s relationship with financial services. At Kunai, we help our clients modernize, capitalize on emerging trends, and evolve their business for the coming decades by remaining tech-agnostic and human-centered.
We are seeking a Senior Software Engineer with expertise in Java, SpringBoot, MongoDB, and cloud solutions with a strong foundation in software architecture. In this role, you will work with a leading bank to build a modernized data platform that includes Data Standardization, Producer/Consumer Self-Service, APIs, Data Governance, and Core Services. The ideal candidate will be passionate about building performant, scalable, and maintainable systems and comfortable working in a modern, event-driven microservices environment. This role requires hands-on backend development skills, architectural insight, and the ability to navigate and improve large, complex codebases.
Key Responsibilities:
Design, develop, and maintain scalable backend services using Java and SpringBoot
- Data modelling focused on relational databases, MongoDB, or Neo4J
Cloud development experience in either on-prem or public cloud, with Docker and Kubernetes
Collaborate with architects and senior engineers to review and enhance backend system architecture
Review and refactor large codebases, ensuring best practices in software design and performance optimization
Conduct code reviews, performance tuning, and troubleshoot issues across the stack
Maintain high standards of code quality, security, scalability, and maintainability
Required Skills:
10+ years experience in Java (5+ years with 11+), Java Streams, and SpringBoot 2.x+
- Significant database / data modelling experience either on relational databases, MongoDB, or Neo4J
Deep understanding of distributed systems, caching strategies, and scalability challenges
Demonstrated experience building highly concurrent, low latency microservice applications
Strong understanding of software architecture, design patterns, and system design principles
Comfortable working with large codebases, including reviewing and refactoring code
Preferred Skills:
Advanced experience designing and deploying Kafka-based messaging systems
Cloud development experience either on-prem or public cloud, with Docker and Kubernetes
Experience with distributed caching technologies
Experience leading a team a strong plus
Our success over the past 20 years is rooted in our exceptional team, which thrives in a culture of collaboration, creativity, and continuous learning.
We are proud to offer our employees a range of benefits, including competitive compensation, professional development opportunities, and flexible work arrangements, all designed to help them thrive. As we continue to expand, we remain committed to cultivating an environment where people feel valued, have a voice, and are given the tools to grow—both personally and professionally—while pushing the boundaries of innovation in the fintech industry.
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What We Do
Kunai is a safe workplace for brilliant minds in the fields of software engineering & architecture, business development, recruiting and strategy. We specialize as an agency for fintech organizations ranging from unicorn startups to Fortune 500 companies. Our team of 120+ individuals is dispersed all around the world, which organically builds diversity into our culture's DNA. Our mission is to take care of our people so that together we can all do the best work of our lives.
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