Senior Engineer - Payment & Wallet (Remote)

About the Role

We are looking for a Senior Engineer - Payment & Wallet to join our Payments & Wallet team (also known as PAW 🐾) — the core group handling asset management, compliance, and On-chain Services & Integrations (Superwallet) at Coinhako. In this role, you will be responsible for designing, developing, and maintaining high-performance services that power our payments and wallet infrastructure. As a Senior Engineer - Payment & Wallet, you will collaborate with cross-functional teams to ensure seamless integration across systems, optimize transaction workflows, and enhance platform reliability and scalability.

What You'll Do

• Architect and build scalable backend services. Our tech stack includes Rails 7, Go, Sidekiq, REST, AWS, and Docker.
• Design and build high-volume APIs used by our frontends and external traders.
• Take initiative to ensure the long-term quality of the code and drive decisions related to the architecture of production systems.
• Manage and maintain custody solutions for digital assets, ensuring the highest level of security and compliance in handling and storing digital assets, including cryptocurrencies, tokens, and digital records.
• Collaborate with other engineers, product managers, and designers during various product development stages.
• Improve engineering standards, tooling, and processes.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.
• 5+ years of experience building scalable distributed systems with a strong background in Ruby; knowledge of Go is a plus.
• Understanding of best practices for building and working with APIs.
• Comfortable with ambiguity and scoping solutions with your teammates.
• Organized, proactive, and able to manage your own tasks effectively.
• Knowledge of cryptography and security principles in blockchain, as well as compliance and regulatory frameworks for cryptocurrency.

Nice to Have

• Experience with cloud services (AWS, Azure).
• Familiarity with Docker and container orchestration.
• Previous experience in the crypto or fintech industry.

What We Offer

• Friendly and fun start-up work culture.
• Convenient work location in the heart of the CBD area.
• Generous annual leave on top of national holidays.
• Medical coverage including GP, Specialist, TCM, and more.
• Self-care benefits and exciting fitness workshops/webinars.
• Vibrant office with a well-stocked pantry.