Fullstack Developer

Role Overview

We are looking for a Senior Full Stack Developer to build and scale our fintech platform. You will own the entire lifecycle of our financial products, from designing high-performance relational schemas in PostgreSQL to building interactive dashboards in React.

Key Responsibilities

• Full Stack Development: Build and maintain end-to-end features using the PERN stack

(PostgreSQL, Express.js, React, Node.js).

• Database Optimization: Design complex relational models and optimize SQL queries to

handle high-volume financial data and audit trails.

• Security & Compliance: Implement rigorous security measures (e.g., JWT, OAuth, data

encryption) and ensure the platform adheres to fintech standards like PCI-DSS.

• API Architecture: Develop robust RESTful APIs to integrate with third-party banking APIs,

payment processors (Stripe/Plaid), and KYC providers.

Technical Requirements

• Front-end: Advanced proficiency in React.js (Hooks, Context API, Redux or TanStack Query)

and modern CSS (Tailwind/Styled Components).

• Back-end: Expert-level Node.js and Express.js experience, with a focus on asynchronous

programming and secure API design.

• Database: Deep knowledge of PostgreSQL (complex joins, indexing, triggers, and

migrations).

Additional skills

• Understanding of Event-Driven Architecture (using AWS SQS/SNS or Kafka).

• Familiarity with SOC2 or ISO 27001 compliance frameworks.

• Cloud (AWS): Proven experience with:

• RDS/Aurora for managed databases.
• IAM for secure access management.
• AWS Lambda & API Gateway for serverless architecture.
• CloudWatch for monitoring and alerting.

• Tools: Git, Docker, and experience with CI/CD workflows.

About US

RJ Fintech Solutions Pvt. Ltd. is a high-growth fintech startup on a mission to automate business financial operations. In a world where financial systems are often slow and opaque, we are building the "missing link"—a secure, transparent, and lightning-fast platform that puts banking and compliance first for various corporates.

We are not just another financial app; we are an engineering-first company. We believe that elegant code and robust architecture are the foundations of trust. By leveraging the PERN stack and AWS cloud-native infrastructure, we are replacing legacy complexity with modern, scalable solutions.

Why Work With Us?

1. Build the Foundation, Not Just Features

You won't be a small cog in a massive machine. As an early member of our engineering team, you will help define our technical architecture, choose our libraries, and set the coding standards for everyone who follows. Your fingerprints will be on the core DNA of our product.

2. Solve Problems That Matter

Fintech is one of the few industries where code has a direct, measurable impact on people's lives.

Whether we are [e.g., simplifying cross-border payments, democratizing investment, or building the next generation of credit], you will be solving high-stakes challenges around security, trust, and financial inclusion.

Job Title: .NET Full Stack Developer

Experience: 3 to 6 Years

Work Mode: Hybrid (2-3 days from office)

Location: Gurgaon

Joiners: Immediate joiners or candidates who have completed their notice period preferred

Key Responsibilities

• Design, develop, and maintain web applications using .NET (C#) on the backend and Angular/React on the frontend.
• Develop RESTful APIs and integrate them with front-end components.
• Collaborate with UI/UX designers, backend developers, and product managers to deliver high-quality features.
• Write clean, maintainable, and efficient code following best practices.
• Participate in code reviews and contribute to continuous improvement of development processes.
• Troubleshoot and debug issues across the application stack.
• Work with DevOps teams to support CI/CD pipelines and deployment.
• Ensure application scalability, performance, and security.
• Contribute to documentation, unit testing, and version control.

Required Skills

• Strong proficiency in C# and .NET Core/.NET Framework.
• Experience with JavaScript and modern front-end frameworks like Angular or React (preference for Angular).
• Exposure to cloud platforms – Azure (preferred), AWS, or GCP.
• Good understanding of HTML5, CSS3, and TypeScript.
• Experience in RESTful API development.
• Familiarity with Entity Framework and SQL-based databases like SQL Server.
• Understanding of version control systems like Git.
• Basic knowledge of CI/CD practices and tools like Azure DevOps or Jenkins.

Responsibilities:

• Design and develop scalable, responsive, and efficient web applications using the MERN stack.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Work on both front-end and back-end development tasks, ensuring the high performance and responsiveness of the applications.
• Write clean and maintainable code and participate in code reviews.
• Implement and maintain security and data protection measures.
• Integrate third-party APIs and services.
• Troubleshoot, debug, and resolve software defects and issues.
• Stay up-to-date with emerging technologies and industry trends.

Requirements:

• Minimum of 1-2 years of experience as a MERN Stack developer.
• Bachelor's degree in computer science, engineering, or a related field.
• I have proven experience as a full-stack developer with expertise in the MERN stack.
• Strong proficiency in JavaScript (ES6+), HTML5, CSS3,.
• Experience with front-end frameworks like React.js.
• Knowledge of state management libraries such as Redux.
• Solid understanding of server-side development using Node.js and Express.js.
• Experience with MongoDB and database design.
• Knowledge of RESTful API design and implementation.
• Familiarity with Git and version control systems.
• Excellent problem-solving and debugging skills.
• Strong communication and collaboration skills.
• Ability to work in a fast-paced and dynamic environment.

We are looking for a Full Stack Developer to produce scalable software solutions. You'll be part of a cross-functional team that's responsible for the full software development life cycle, from conception to deployment. As a Full Stack Developer, you should be comfortable around front-end and back-end coding languages, development frameworks and third-party libraries. You should also be a team player with a knack for visual design and utility. Too familiar with Agile methodologies.

Responsibilities

• Design client-side and server-side architecture
• Build the front-end of applications through appealing visual design
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation

Requirements

• Proven experience as a Full Stack Developer or similar role
• Experience developing desktop and mobile applications
• Familiarity with common stacks like LAMP Stack and Mean Stack...
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Knowledge of multiple back-end languages (e.g. PHP, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• An analytical mind
• Degree in Computer Science, Statistics or relevant field

- Experience with front-end technologies such as Angular or React with Redux. 

- Experience working in NodeJS with Express 

- Experience with PHP development using any one of it's framework will be considered as    a value add 

- Experience working with SQL or NoSQL databases, the ability to write efficient queries        and benchmark/profile them 

- Mastery of object oriented JavaScript, ES6, HTML, and CSS/SASS/StyledComponents 

- Experience in RESTful API development 

- Strong understanding of asynchronous programming 

- Experience with performance debugging and benchmarking 

- Experience with testing frameworks like Karma, mocha, or jest 

- Experience with Git version control 

- Understanding of CI/CD 

- Strong attention to design detail (UI/UX). 

Who we are:

We are leading CMMI Level 3 global organization. We enjoyed a stable leadership since its inception in the Silicon Valley, California in 1996. We have expanded from a single location to current presence in 5 global cities with round-the-clock connectivity.

Since inception, the driving core values inculcated by our founder, management team and investors have been the ongoing guiding force.

We emerged as a leading custom software development organization, spread across the globe. We made business easier and more profitable for varied small to medium size projects. As a technology partner, we deliver solutions in line with your business goals. With 2000+ happy customer base, vast experience of 20+ years, backed by offices in the US, Australia and India, providing next-door assistance and a round-the-clock connectivity. Our software solutions cover all major industries such as healthcare, digital enterprises, business automation and IT services, highlighting our expertise in Microsoft open source platform, mobile platforms and new technologies.

 To know more about we visit http://www.smartdatainc.com">http://www.smartdatainc.com

About You:

Should build interactive consumer data from multiple systems and restfully abstract to the UI through a Node.js backend.

• Should define code architecture decisions to support a high-performance and scalable product with a minimal footprint
• Should address and improve any technical issues
• Should be good in communication skills and teamwork ability to work between different levels of developers.
• Should be able to work/handle projects single handed by own
• Should perform unit/per testing for creating a bug free solution.

You should possess:

• Experience of Node JS, Express JS, Mongo DB, Angular 2+.
• Knowledge of GIT, Jenkins tools or similar.
• Knowledge working with AWS (S3, EMR, EC2, RDS).
• Experience of Agile development and methodology.

Good to have:

•  Project management and deployment skills.
• Knowledge of Dockers and Kubernetes.

• Onsite experience.
• US business Visa.