Senior Backend Engineer, Payments and Wallet

Coinhako; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Medical coverage

Annual leaves

CBD office location

Well-stocked pantry

Job summary

Coinhako is seeking a Senior Backend Engineer to join the Payments & Wallet team. You will architect and build scalable backend services using Rails 7 and Go, design high-volume APIs for frontends and external traders, and ensure production systems remain reliable and compliant.

You will collaborate with engineers, product managers, and designers, drive architectural decisions, and contribute to testing and tooling improvements. Prior experience in fintech or crypto is a plus.

Qualifications

• 5+ years of building scalable distributed systems with Ruby and Go
• Experience designing high-volume REST APIs
• Experience with fintech or crypto-related products is a plus

Responsibilities

• Architect and build scalable backend services using Rails 7, Go, Sidekiq, REST, and AWS
• Design and build high-volume APIs used by frontends and external traders
• Improve code quality and architectural decisions for production systems
• Collaborate with engineers, product managers, and designers across development stages
• Write and improve unit and integration tests

Skills

Ruby

Go

Rails

APIs

Distributed systems

REST

Tools

Rails 7

Sidekiq

AWS

Docker

REST APIs

Job description

Coinhako is a market-leading platform for access to digital assets like Bitcoin from Singapore.

Founded in 2014, Coinhako has established a reputation as being one of the most secure and trusted digital asset wallet service providers and trading platforms in the APAC market. Our team is deeply passionate about building the crypto economy in the APAC region. Through the launch of our innovative suite of products and services, Coinhako aims to empower individuals and businesses by allowing them to take ownership and control of how they build and manage their assets in the new digital finance world.

In line with our expansion, we are looking for motivated individuals with a passion for the crypto space.

We are looking for a Senior Backend Engineer to join the Payments & Wallet team (also known as PAW). The solutions we develop sit at the intersection of crypto and fiat worlds. Our mission is to support customers with deposits and withdrawals, ensure transactions are compliant and reliable.

What you’ll be doing:

• 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;
• Collaborate with other engineers, product managers and designers during various product development stages;
• Write and improve unit and integration tests
• Improve engineering standards, tooling, and processes.

What we’re looking for:

• Have 5+ years of building scalable distributed systems with a strong background in Ruby, Go is a plus;
• Understand good practices of building and working with APIs;
• Comfortable with ambiguity and scoping solutions with your teammates;
• You are proactive in communicating technical trade offs and focus the team on meeting technical and business requirements;
• You’re organized, proactive and can be your own manager;
• Experience with financial product companies and interest in crypto markets is a plus.

What’s in it for you:

• 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
• Animal-friendly environment, with a fluff ball in the office

Find out more about Coinhako here https://www.coinhako.com/join-us

Listed in: Web3 Jobs, Remote Web3 Jobs, Web3 Web3 Jobs, Trading Web3 Jobs, Developer Crypto Jobs, Engineering Crypto Jobs, Senior Crypto Jobs, Finance Crypto Jobs, Manager Web3 Jobs, Ruby Crypto Jobs, Docker Crypto Jobs, Bitcoin Web3 Jobs, Full Time Crypto Jobs.