Senior Engineer - Payment & Wallet

We are looking for a Senior Engineer 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. You’ll collaborate with cross-functional teams to ensure seamless integration across systems, optimize transaction workflows, and enhance platform reliability and scalability.

• Architect and build scalable backend services. Our tech stack is Rails 7, Go, Sidekiq, REST, AWS, 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. Ensure 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.

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field;
• Understand good practices of building and working with APIs;
• Have 5+ years of building scalable distributed systems with a strong background in Ruby, Go is a plus;
• Comfortable with ambiguity and scoping solutions with your teammates;
• You’re organized, proactive and can be your own manager;
• Knowledge of cryptography and security principles in blockchain as well as compliance and regulatory frameworks for cryptocurrency.

• Friendly and fun start-up work culture
• Convenient work location located in the heart of CBD area
• Generous annual leaves 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

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