Lead Engineer

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.

Roles and Responsibilities

• Develop and revamp creative, eye-catching websites as per the client's needs.
• Work with project managers to discuss the desired website functionality and provide solutions.
• Integrate custom templates/themes into WordPress.
• Work with various WordPress third-party plugins (Like WooCommerce, Buddypress, Elementor, and others) and customize when required.
• Develop custom plugins and custom functionalities on top of Wordpress and WooCommerce.

Skills:

• Experience & Knowledge of WordPress Architecture, WooCommerce, Page Builder’s (like Elementor, Divi, Visual Composer etc), and other best practice solutions
• Experience & Knowledge of PHP, MySQL, HTML, CSS, Javascript/jQuery.
• Experience & Knowledge of child theme creation and customization as per designed based on the requirements
• Experience & Knowledge of WordPress plugin and Back-End functionality development

• Ship high-quality, well-tested, secure, scalable, extensible, and maintainable code as well as perform code review.
• Lead a team of highly efficient developers working on agile development practices including sprint planning.
• Apply design principles and patterns in creating enterprise-level solutions, as needed.
• Design products, services, and systems that are resilient to the iteration and change required by the needs of the business.
• Research new technologies and development methodologies to drive efficiency and improve customer experience.
• Coordinated with the US-led product and sales team to strategize and carry out the development of custom features and functionality requests.

• 3+ years of experience as a Full stack developer.
• Extensive experience working with NodeJS platforms.
• Expertise in building robust REST and GraphQL APIs.
• Hands-on experience with frameworks like ExpressJS, NextJS, and Fastify.
• Hands-on experience with SQL/NoSQL databases like PostgreSQL, MySQL and Redis.
• Hands-on experience in working with React-related libraries like Redux,
• MaterialUI and frameworks like NextJS.
• Strong hands-on experience with source code management systems like git.
• Working knowledge of WebSocket technologies.

• We offer the best market salaries for ideal candidates.
• Our culture is focused on talent development with semi-annually promotion cycles and company-sponsored certifications.
• The opportunity to work with and lead cutting-edge technologies.
• Opportunity to earn company stock options.
• Mediclaim hospitalization insurance for self, spouse, two children, and parents.

Requirements:

• Bachelor's or master’s degree in computer science or equivalent work experience.
• A solid understanding of the full web technology stack and experience in developing web applications
• Strong experience with React JS framework for building visually appealing interfaces and back end frameworks like Django
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Good knowledge of object-oriented programming and data structures in Python
• Experience with NoSQL databases, web server technologies, designing, and developing APIs.
• Strong knowledge and work experience in AWS cloud services
• Proficiency with Git, CI/CD pipelines.
• Knowledge in Agile/Scrum processes.
• Experience in Docker container usage.

Roles and responsibilities:

• Develop sophisticated web applications for drone control, data management, security, and data protection.
• Build scalable features using advanced framework concepts such as Microservices, Queues, Jobs, Events, Task Scheduling, etc.
• Integrate with Third-Party APIs/services
• Use theoretical knowledge and/or work experience to find innovative solutions to the problems at hand.
• Collaborate with team members to ideate solutions.
• Troubleshoot, debug, and upgrade existing software.
• Passionate to learn and adapt in a start-up environment.

Perks:

• Hands-on experience with state of the art facilities we use for robot development.
• Opportunity to work with industry experts and researchers in the field of AI, Computer Vision, and Machine Learning.
• Competitive salary.
• Stock options.
• Opportunity to be an early part of the team and grow with the startup.
• Freedom of working schedule.
• Opportunity to kickstart and lead your own projects.

1. Rails 6 or 7
2. Writing integration tests And Mini-Test or rSpec
3. Simple_form and nested attributes
4. Hotwire / Turbo
5. ActionText

1. Administrate
2. Devise
3. Pundit
4. Acts as Tenant

We are looking for a Full Stack developer responsible for the development and maintenance of Vyapar server-side infrastructure. Your primary focus will be building and maintaining the complete server-side infrastructure. Strong understanding of Core Javascript, HTML, CSS, and Relational Database are critical for the role.

Responsibilities:

• Translate designs and wireframes into high-quality code
• Design, build and maintain high performance, reusable, and reliable APIs
• Ensure the best possible performance, quality, and responsiveness of the APIs
• Maintaining the AWS infrastructure, security, performance and uptime
• Identify and correct bottlenecks and fix bugs
• Help maintain code quality, organization, and automatization
• Helping the team members and guiding them for the right design and implementation

Skills:

• Strong knowledge of Javascript and NodeJs, HTML, CSS, JQuery along with great algorithmic skills.
• Good knowledge of PHP (Laravel)
• Strong knowledge of AWS Services and good experience in handling server-side infrastructure.
• Strong knowledge of design patterns and best practices.
• Strong understanding, creating, manipulating, and querying database – Mongo DB, MySql.
• Familiarity with RESTful APIs, web sockets, continuous integration, and caching technologies.
• A knack for benchmarking and optimization