Fullstack Engineer - Payward Services - Custody

As a Fullstack Engineer on the Payward Services Custody team at Kraken, you'll design and deliver the next generation of crypto custody and settlement services. You join a globally distributed, mission-driven group building secure, scalable infrastructure that forms the backbone of custody operations, from key management and wallet orchestration to transaction pipelines and compliance systems.

What you'll do

• 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 and 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 own services throughout their full lifecycle from RFCs and design to deployment and maintenance.

What you bring

• 3+ 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 in distributed, cross-functional teams.

Nice to have

• Understanding of crypto protocols, staking mechanisms, and the broader blockchain technology ecosystem.
• Experience with gRPC and Protocol Buffers.
• Hands-on experience with Rust.
• Background in financial systems, digital assets, and experience in custodial or other regulated environments.

About Kraken

Payward, the parent company behind Kraken, NinjaTrader, Breakout, xStocks, Payward Services and CF Benchmarks, has spent 15 years building one of the most modern and globally accessible financial infrastructure platforms in the industry. Payward Services is an enterprise infrastructure platform enabling companies to seamlessly integrate trading, payments, funding, and digital asset services through a unified system.