Senior Node.js Backend Developer ( FinTech Domain)

Avisoft; Mumbai; Hybrid; INR 2,500,000 - 4,200,000; Full time

Job summary

Avisoft in Mumbai seeks an experienced Senior Node.js Backend Developer to lead design and implementation of scalable backend systems for FinTech products. You will specialize in Node.js, TypeScript, microservices, and API development in a cloud-native environment.

Ideal candidates have 8+ years in backend development within financial services, with hands-on experience in trading platforms, capital markets, and high-throughput transactions.

Qualifications

• 8–12 years of backend development experience in FinTech.
• Hands-on experience in Trading, Capital Markets, Stock Brokerage, Investment Banking, or FinTech products.
• Strong Node.js, JavaScript, and TypeScript expertise.
• Proven experience building RESTful APIs and backend services.
• Strong understanding of Microservices Architecture.
• Experience with Express.js or NestJS.
• Hands-on with SQL and NoSQL databases.
• Familiarity with Docker and containerized deployments.
• Knowledge of cloud platforms (AWS/Azure/GCP) and DevOps practices.

Responsibilities

• Design, develop, and maintain scalable backend applications using Node.js.
• Build and optimize RESTful APIs and microservices for FinTech applications.
• Design and implement scalable and resilient microservices architectures.
• Develop backend systems for high-volume financial transactions and real-time processing.
• Optimize performance, queries, APIs, and backend processes for high throughput.
• Implement secure authentication, authorization, and API security mechanisms.
• Develop and integrate real-time financial data and transaction services.
• Collaborate with Product, Frontend, QA, DevOps, and Architecture teams.
• Participate in architecture discussions, code reviews, and technical decisions.
• Troubleshoot production issues and ensure high availability, reliability, and performance.
• Implement logging, monitoring, debugging, and performance tuning practices.
• Follow secure coding, development, and deployment best practices.

Skills

Node.js

JavaScript

TypeScript

Microservices

REST APIs

Cloud (AWS/Azure/GCP)

Docker

Kubernetes

Git / DevOps

CI/CD

Real-time systems

Tools

Express.js

NestJS

Kafka

RabbitMQ

PostgreSQL

MongoDB

Redis

AWS/Azure/GCP

Job description

About the Role

We are seeking an experienced Senior Node.js Backend Developer with strong expertise in Node.js, TypeScript, Microservices, API development, and cloud-native backend systems.

FinTech experience is a key requirement for this position. The ideal candidate should have hands-on experience working on Trading Platforms, Capital Markets, Stock Brokerage, Investment Banking, or FinTech products, particularly systems involving high-volume, secure, and real-time financial transactions.

Key Responsibilities

• Design, develop, and maintain scalable, secure, and high-performance backend applications using Node.js.
• Build and optimize RESTful APIs and microservices for enterprise-grade FinTech applications.
• Design and implement scalable and resilient microservices architectures.
• Develop backend systems supporting high-volume financial transactions and real-time processing.
• Optimize application performance, database queries, APIs, and backend processes for high-throughput transaction workloads.
• Implement secure authentication, authorization, and API security mechanisms.
• Develop and integrate real-time financial data and transaction services.
• Collaborate with Product, Frontend, QA, DevOps, and Architecture teams.
• Participate in architecture discussions, code reviews, and technical decision-making.
• Troubleshoot production issues and ensure high availability, reliability, and performance.
• Implement logging, monitoring, debugging, and performance-tuning practices.
• Follow secure coding, development, and deployment best practices.

Mandatory Skills & Experience

• 8-12 years of hands-on backend development experience.
• Relevant FinTech / Financial Services domain experience Key Requirement.
• Experience in Trading, Capital Markets, Stock Brokerage, Investment Banking, or FinTech products - Strongly Required.
• Strong hands-on expertise in Node.js and JavaScript.
• Strong knowledge of TypeScript.
• Proven experience building RESTful APIs and backend services.
• Strong understanding and hands-on experience with Microservices Architecture.
• Experience with Express.js or NestJS.
• Strong understanding of asynchronous programming and event-driven architecture.
• Experience with SQL and NoSQL databases such as PostgreSQL, MySQL, MongoDB, or Redis.
• Experience building systems handling high-volume / high-throughput transactions.
• Hands-on experience with Docker and containerized deployments.
• Familiarity with AWS, Azure, or GCP.
• Strong knowledge of Git and modern software development practices.
• Experience with CI/CD pipelines and DevOps workflows.
• Strong debugging, problem-solving, and analytical skills.

Preferred Skills

• Experience with low-latency financial transaction systems.
• Knowledge of real-time market data, trading workflows, or brokerage systems.
• Experience with WebSockets and real-time data streaming.
• Hands-on experience with Kafka, RabbitMQ, or similar messaging platforms.
• Experience with Kubernetes and container orchestration.
• Knowledge of GraphQL.
• Experience with financial APIs, payment systems, order management, or market data integrations.