Senior Full Stack Engineer – React / Java / Node.js (Enterprise SaaS)
Location: Mumbai (Work-from-Office)
Department: Engineering | Industry: FinTech / SaaS
Experience: 4+ years | Compensation: Competitive (₹12–22 LPA based on fitment)
About Global PayEX
At Global PayEX, 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 like JPMorgan, Citi, ITC, and Tata Group.
We’re expanding our engineering team in Mumbai to strengthen both the backend intelligence layer and the user-facing experience of our enterprise-grade SaaS stack.
Role Overview
We’re looking for a Senior Full Stack Engineer with strong expertise across modern frontend frameworks and backend microservices.
You will architect and build scalable, secure, and high-performance applications spanning UI components, APIs, and data services. This is a hands-on role for someone who thrives on designing complete systems — from intuitive dashboards to robust backend services — while leading by example within Agile teams.
Key Responsibilities
- Design and develop responsive frontend applications using React.js (preferred) or Angular.
- Architect and implement scalable backend services using Java (Spring Boot) or Node.js.
- Build and integrate secure RESTful APIs and microservices.
- Optimize frontend performance and ensure seamless API integration.
- Design efficient MongoDB or relational database schemas for transactional workloads.
- Collaborate cross-functionally with DevOps, QA, AI, and Product teams to deliver end-to-end features.
- Lead code reviews, establish frontend/backend best practices, and enforce clean architecture principles.
- Troubleshoot production issues across UI and service layers.
- Mentor junior engineers and contribute to sprint planning, estimations, and architectural discussions.
- Participate actively in Agile ceremonies – planning, retrospectives, and technical roadmap sessions.
Required Skills & Experience
- 4+ years of experience in full-stack development within SaaS or enterprise systems.
- Strong expertise in React.js (or Angular) and modern JavaScript (ES6+).
- Solid backend experience in Java (Spring Boot) or Node.js.
- Strong understanding of API design, authentication (JWT/OAuth), and security best practices.
- Proficiency in MongoDB or relational databases.
- Experience working with REST APIs and OpenAPI/Swagger documentation.
- Familiarity with Docker and containerized environments.
- Strong debugging, performance tuning, and system design capabilities.
- Sound grasp of OOP, design patterns, SOLID principles, and frontend architecture patterns.
Preferred Qualifications
- Experience in FinTech, Payments, ERP integrations, or Banking systems.
- Exposure to asynchronous programming models and event-driven systems.
- Familiarity with Kubernetes and CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions).
- Working knowledge of cloud environments (AWS/Azure/GCP).
- Experience building data-heavy dashboards or financial analytics UIs.
Why Join Global PayEX
- Build enterprise-grade fintech systems used by global banks and Fortune enterprises.
- Own both the experience layer and intelligence layer of mission-critical applications.
- Work alongside a world-class engineering team focused on asynchronous and AI-integrated systems.
- Collaborative, transparent, and innovation-driven culture.
- Direct exposure to AI agents and real-time financial data systems.
- Competitive compensation and a clear growth trajectory into Engineering Lead or Architect roles.
How to Apply:
Send your CV or GitHub profile to with the subject line
“Senior Full Stack Engineer | (Your Name)”
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