Senior Fullstack Engineer — Crypto Custody & APIs (Remote)

Kraken; Australia; Remote; AUD 120,000 - 180,000; Full time

Job summary

Kraken is recruiting senior backend/fullstack engineers to build scalable custody and settlement services for institutional clients. You will design and implement secure, high-performance microservices, integrate with blockchain networks, and contribute to React/Next.js frontend work for operator visibility and reliability.

You will join a distributed, DevOps-oriented team that values technical excellence, collaboration, and innovation in a fully remote environment.

Qualifications

• 5+ years of professional experience in fullstack or backend engineering within high-scale, high-availability systems.
• Expert-level proficiency in Node.js and TypeScript, with hands-on experience using NestJS or similar frameworks.
• Deep understanding of microservices, event-driven architectures, and CQRS/DDD design patterns.
• Proven ability to design and deliver RESTful APIs and asynchronous event-based communication systems.
• Strong experience with SQL databases and schema design for performance and reliability.
• Solid understanding of React and modern frontend best practices.
• Deep knowledge of state management (React Query, Context API, custom hooks).
• Experience with Next.js, Tailwind CSS, and component-driven architecture.
• Hands-on experience with Docker, CI/CD, and observability tools such as Prometheus and Splunk.
• Excellent collaboration and communication skills — capable of working effectively in distributed, cross-functional teams.

Responsibilities

• Collaborate with product managers, architects, and DevOps engineers to design and deliver secure, scalable, and high-performance custody solutions.
• Build and maintain new backend microservices in TypeScript, Node.js, powering custody, staking, and wallet services.
• Integrate with blockchain networks and external systems to support asset movements, transactions, and key management workflows.
• Contribute to frontend applications built with React and Next.js, ensuring clear operational visibility and seamless user experience.
• Develop event-driven systems using Kafka for real-time data processing and inter-service communication.
• Write reusable, testable, and efficient code, maintaining high standards for performance, observability, and fault tolerance.
• Collaborate across teams to design and optimize data models, APIs, and distributed architectures.
• Participate in technical reviews, mentor other engineers, and take ownership of services throughout their full lifecycle — from RFCs and design to deployment and maintenance.

Skills

Node.js

TypeScript

NestJS

Microservices

REST APIs

SQL Databases

React

React Query

Next.js

Tailwind CSS

Docker

CI/CD

Observability

Prometheus

Splunk

Collaboration

Tools

Kafka

gRPC

Protocol Buffers

Rust

Job description

Kraken is recruiting senior backend/fullstack engineers to build scalable custody and settlement services for institutional clients. You will design and implement secure, high-performance microservices, integrate with blockchain networks, and contribute to React/Next.js frontend work for operator visibility and reliability.

You will join a distributed, DevOps-oriented team that values technical excellence, collaboration, and innovation in a fully remote environment.