Senior Software Engineer

XENDER TECH PTE. LTD.; Singapore; On-site; SGD 120,000 - 200,000; Full time

Job summary

XENDER TECH PTE. LTD. is seeking a Senior Software Engineer (Java Backend) to lead architecture and development of core backend systems, distributed services, and cloud-based applications for international products.

You will design high-concurrency platforms, implement payment gateways and wallet systems, and collaborate across teams to deliver end-to-end solutions using Spring Cloud, Redis, Kafka, and MySQL on AWS and Alibaba Cloud.

Qualifications

• Bachelor’s Degree in Software Engineering or related field.
• 10+ years of Java backend, distributed systems, and system architecture.
• Expertise in Spring/Spring Cloud, Redis, Kafka, RocketMQ, and MySQL.
• Hands-on with AWS and Alibaba Cloud.
• Experience designing payment gateways, billing engines, wallet systems.
• Strong problem-solving and ability to lead end-to-end delivery in international environments.

Responsibilities

• Architect and develop high-concurrency, globally distributed backend systems.
• Build and maintain payment gateways, billing engines, and wallet services.
• Develop cloud data pipelines and analytics platforms using AWS and Alibaba Cloud.
• Ensure scalability with load balancing and distributed locks.
• Lead end-to-end delivery from design to production deployment.

Skills

Java backend

Distributed systems

High concurrency

Leadership

Problem solving

International environments

Education

Bachelor’s Degree in Software Engineering or related field

Tools

Spring / Spring Cloud

Redis

Kafka

RocketMQ

MySQL

AWS

Alibaba Cloud

Job description

Job Description

We are looking for a highly skilled and experienced Senior Software Engineer (Java Backend) to lead and contribute to the architecture, design, and development of our core backend systems, distributed services, and cloud-based applications. You will play a crucial role in building high-concurrency, transaction-intensive platforms that support our international products.

Key Responsibilities:

• Architecture & Development: Design and deliver high-concurrency, transaction-intensive, and globally distributed backend systems.

• Core Systems Engineering: Build and maintain scalable backend services including payment integration layers, multi-wallet accounting systems, real-time communication/matching engines, and centralized configuration platforms.

• Cloud & Data Management: Manage cloud-based applications and data platforms using AWS (S3, Amazon Athena) and Alibaba Cloud, building efficient data ingestion pipelines and operational analytics platforms.

• Optimization & Scalability: Apply distributed locks, load balancing and service degradation to handle high-volume user transactions and high-concurrency scenarios.

• End-to-End Delivery: Drive full-lifecycle development from architecture design and backend coding to third-party service integration, production deployment, troubleshooting, and system optimization.

Requirements & Qualifications

• Education: Bachelor’s Degree in Software Engineering or a related technical field.

• Experience: Minimum of 10+ years of professional experience in Java backend development, distributed systems, and system architecture.

• Technical Stack:

  • Strong expertise in the Spring / Spring Cloud ecosystem, Redis, Kafka, RocketMQ and MySQL.

  • Hands-on experience with cloud platforms including AWS and Alibaba Cloud.

• Domain Expertise: Proven track record in designing payment gateways, billing engines, user account authentication services, wallet systems, and real-time interactive platforms.

• Soft Skills: Strong problem-solving abilities, experience working on international/multi-country product environments, and ability to lead end-to-end technical delivery.