Senior Kotlin/Java Developer
Tangem is a hardware wallet company that lets users store, buy, swap, stake, and spend crypto using NFC-enabled card and ring-shaped devices.
Maintainer signals as of 9/25/2026
Funding history
About Tangem
Tangem builds hardware wallets for users who want to self-custody digital assets without relying on exchanges or custodians. Users can store, send, receive, swap, stake, and spend crypto across multiple blockchain networks using NFC-enabled card or ring-shaped devices paired with a companion mobile app. The wallets use a secure element chip, require no batteries or cables, and offer a seedless backup system using multiple physical cards.
Skills
About the Role
You will design and implement resilient, scalable backend services and write clean Kotlin and Java code. You will build and maintain financial and payment services, collaborate on end-to-end solutions, participate in architecture and code reviews, and improve reliability, observability, and performance.
Requirements
- Excellent knowledge of Kotlin and Java
- Strong production experience as a Backend Engineer
- Solid understanding of software architecture, design principles, and common patterns
- Hands-on experience with CI/CD pipelines and modern development workflows
- Familiarity with cloud-native application development
- Strong communication and collaboration skills
- Experience in fintech or payment systems is a plus
Responsibilities
- Design and implement resilient, scalable, high-performance backend services
- Develop clean, maintainable, extensible Kotlin and Java code
- Build and maintain financial and payment-related services
- Collaborate with product, DevOps, and engineering teams to deliver end-to-end solutions
- Participate in code reviews, architecture discussions, and technical decision-making
- Improve system reliability, observability, and performance
Benefits
- Remote work from anywhere in the world
- Unlimited vacation
- Birthday presents
- Compensation for necessary technical devices
- Paid sick leave