Senior Backend Engineer - Singapore

Windranger Labs; Singapore; On-site; SGD 80,000 - 110,000; Full time

Job summary

A cutting-edge fintech company in Singapore is looking for a Backend Developer to design and develop core systems for millions of users. This role requires proficiency in Go or Java and experience in high availability architectures. You will collaborate with various teams and work on integrating blockchain infrastructure, creating a fast-paced and innovative environment.

Qualifications

• 5+ years backend development experience.
• Proficient in Go or Java with good coding practices.
• Experience designing high concurrency, high availability architectures.

Responsibilities

• Design and develop core backend systems for millions of users.
• Build microservices to support business iteration and scalability.
• Integrate blockchain infrastructure with smart contracts.

Skills

Go

Java

System architecture design

High concurrency management

Strong communication skills

Teamwork spirit

Education

Bachelor's degree in Computer Science or related field

Tools

Kubernetes

Service Mesh

CI/CD

Job description

UR is a borderless smart money app simplifying movement between digital assets and fiat currencies for crypto natives and curious users alike. It’s self-custodial, fast, and intuitive, making complex crypto workflows seamless.

Responsibilities

• Design and develop core backend systems handling high concurrency and high availability for millions of users.
• Build microservices using Go or Java to support fast business iteration and horizontal scalability.
• Participate in architecture design and integration of payment-related systems (payment collection, risk control, clearing, and settlement).
• Integrate blockchain infrastructure and work with Solidity smart contracts.
• Collaborate closely with product, frontend, blockchain, and risk control teams to ensure system stability, security, and high performance.
• Continuously optimize system architecture, performance, maintainability, and drive evolution of tech stack and best practices.

Requirements

• Bachelor’s degree or above in Computer Science or related field.
• 5+ years backend development experience.
• Proficient in Go or Java with good coding practices and engineering discipline.
• Experience designing and implementing high concurrency, high availability architectures for millions of users.
• Familiarity with payment systems and workflows (third-party payment, card payment, crypto payment), including risk control models.
• Understanding of blockchain fundamentals, EVM architecture, and Solidity contract integration.
• Strong communication skills, teamwork spirit, and ability to independently handle complex system modules.

Bonus Points

• Hands-on experience writing and deploying Solidity contracts.
• Familiarity with cutting-edge Web3 fields like account abstraction.
• Experience with DevOps and microservice governance tools (e.g., Kubernetes, Service Mesh, CI/CD).