Senior Software Engineer – Asynchronous Java, Spring Boot, Vert.x, MongoDB (US Timings)

Senior Software Engineer Asynchronous Java, Spring Boot,Vert.x, MongoDB

Location:Work-from-Home (India-based)

Working Hours:7:00 PM 3:00 AM IST (US EST Timings)

Department:Engineering |Industry:FinTech / SaaS

Experience:4+ years |Compensation:Competitive

About GlobalPayEX

At GlobalPayEX, we build world-class AI-driven fintech platforms trusted by global banks and Fortune-scale enterprises.

Our solutions power real-time reconciliation, payments, and working-capital automation for clients likeJPMorgan, Citi, ITC, and Tata Group.

Wereexpanding our global engineering coverage to support clients across the US and are seeking experienced engineers who thrive in asynchronous, distributed systems and can collaborate effectively across time zones.

Role Overview

Werelooking for aSenior Software Engineerwith strongexpertiseinasynchronous Java,Vert.x, Spring Boot, and MongoDB.

Youll architect and build scalable, low-latency microservices that form the backbone of our enterprise-grade SaaS platform.

This is ahands-on remote role,operatingduringUS EST hours, ideal for an engineer who enjoys solving complex concurrency challenges,optimizingsystem performance, and mentoring peers in a high-velocity, global setup.

Key Responsibilities

• Design and implementnon-blocking, event-driven microservicesusingVert.xand Spring Boot.
• Optimizeapplicationperformance, scalability, and resiliencein high-throughput environments.
• Design efficientMongoDB schemas and indexesfor transactional workloads.
• Collaborate remotely withDevOps, frontend, AI, and QA teamsacross time zones to deliver end-to-end solutions.
• Leadcode reviews, writeunit/integration tests, and uphold engineering best practices.
• Troubleshoot production issues and support live systems for US clients.
• Mentor junior developers andparticipatein architecture and sprint planning discussions.
• Participate actively inAgile ceremonies planning, estimation, and retrospectives.

Required Skills & Experience

• 4+ years of backend development inJava.
• Strong understanding ofasynchronous programmingandevent-driven architectures.
• ProvenexpertiseinVert.x, including event bus, workers, and reactive patterns.
• Hands-on experience withSpring Boot microservices.
• ProficiencyinMongoDB(aggregation framework, schema design, indexing).
• Solid experience withRESTful APIsandOpenAPI/Swaggerdocumentation.
• Familiarity withKafka, RabbitMQ,or other message brokers is a plus.
• Strong debugging, performance tuning, and concurrency optimization skills.
• Excellent communication and collaboration skills in remote environments.

Preferred Qualifications

• Experience inSaaS or FinTech/Bankingsystems.
• Exposure toProject ReactororRxJavareactive frameworks.
• Familiarity withDocker, Kubernetes,andCI/CDpipelines (Jenkins, GitLab CI, etc.).
• Working knowledge ofcloud environments(AWS/Azure/GCP).

Why Join GlobalPayEX

• Buildcutting-edgeasynchronous systemsat global scale.
• Work alongside aworld-class fintech engineering teamacross US and India.
• Direct exposure toAI agentsand real-time financial data systems.
• Fully remote setup withglobal collaborationduring US hours.
• Competitive compensation and clear growth trajectory into tech leadership.

How to Apply:

Send your CV or GitHub profile tohr@globalpayex.comwith the subject line

Senior Software Engineer US Timings (Remote) | [Your Name]