Full Stack 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.

We are looking for a Senior Full-Stack Developer with strong experience in modern web and mobile application development.

Requirements:

* 4+ years of full-stack development experience

* Strong Node.js, TypeScript and React.js

* Hands-on React Native experience

* Strong PostgreSQL, Redis and REST API knowledge

* Experience with WebSockets and real-time systems

* Good knowledge of AWS, Docker and CI/CD

* Experience with third-party API integrations

* Strong understanding of scalable architecture and application security

* Experience with GPS/geolocation or real-time applications is a plus

* Strong problem-solving and debugging skills

* Ability to work independently and deliver within tight timelines

* Experience taking applications from development to production

Preferred: Experience in taxi, logistics, delivery, marketplace or booking platforms.

Job Summary:

We are looking for a Senior Full Stack Engineer with 8+ years of experience in designing, developing, and maintaining scalable web applications. The candidate should have strong experience in Java, Node.js, AWS, React, and Angular, with the ability to work across both frontend and backend technologies.

Roles & Responsibilities:

• Design, develop, and maintain scalable full-stack applications.
• Develop backend services and APIs using Java and Node.js.
• Build responsive and user-friendly web applications using React and Angular.
• Design and integrate RESTful APIs and backend services.
• Deploy, manage, and troubleshoot applications on AWS cloud services.
• Work with databases and ensure efficient data management.
• Collaborate with product, QA, and other engineering teams.
• Perform code reviews and ensure coding standards and best practices.
• Troubleshoot production issues and provide effective solutions.
• Participate in Agile development, sprint planning, and technical discussions.
• Contribute to application performance, scalability, security, and reliability.

Mandatory Skills:

• 8+ years of experience in software/full-stack development.
• Strong hands-on experience in Java and Node.js.
• Strong experience in React and Angular.
• Good hands-on experience with AWS.
• Experience in developing and integrating REST APIs.
• Strong understanding of full-stack application development.
• Good problem-solving and communication skills.

Full Stack Engineer

About the Company

We are building an AI-powered platform that transforms credit origination by automating manual bottlenecks and enabling lenders to process more loans with greater accuracy and lower risk. Our mission is to revolutionize the $3 trillion+ asset-based finance market through advanced AI technology, deep industry expertise, and strategic partnerships.

The Opportunity

Join us at an exciting stage of growth as we build and scale an enterprise-grade financial technology platform. As a Full Stack Engineer, you will play a key role in developing core platform features, including a proprietary decisioning system, robust data security for AI applications, and advanced document-processing tools.

Your work will help automate document verification, data extraction, and decision-support workflows. You will collaborate with experienced engineers in a fast-paced, product-focused environment, working with technologies such as Node.js, PostgreSQL, Python, and React.

This is an opportunity to contribute to a high-growth startup, solve real-world financial challenges, and build scalable AI-powered solutions.

Key Responsibilities

1. Full Stack Development

• Design, develop, and maintain full-stack web applications using Node.js, Python, PostgreSQL, GraphQL, and React.
• Build scalable, reliable, and maintainable application features.
• Develop responsive and efficient user interfaces integrated with robust backend services.

2. AI and Document Processing

• Build Python-based AI pipelines to automate document processing and underwriting workflows.
• Contribute to document verification, data extraction, and decision-support capabilities.
• Support the integration of AI-powered features into the core platform.

3. Collaboration and Product Development

• Collaborate with product and engineering teams to translate user requirements into scalable and efficient code.
• Participate in technical discussions and contribute to feature planning and implementation.
• Work closely with team members to deliver high-quality product features.

4. Performance and Scalability

• Optimize application performance and ensure efficient data flow and real-time functionality.
• Identify and resolve technical issues across the application stack.
• Contribute to architectural decisions that support platform scalability and long-term growth.

5. Code Quality and Deployment

• Participate in code reviews, testing, debugging, and deployment.
• Follow software development best practices to ensure code quality, reliability, and maintainability.
• Contribute to CI/CD pipelines and application deployment processes.

Required Qualifications

• 3+ years of professional experience as a Full Stack Engineer.
• Strong proficiency in Node.js and PostgreSQL, with experience in Python and hands-on experience with React.
• Experience developing and maintain

* Design, develop, and maintain responsive websites and web applications.

* Build reusable frontend components using React.js.

* Develop scalable backend APIs and services using Node.js.

* Integrate third-party services and payment gateways such as Stripe.

* Build RESTful APIs and integrate with modern databases.

* Optimize applications for maximum speed, scalability, and SEO.

* Collaborate with designers to translate Figma/UI designs into pixel-perfect interfaces.

* Implement authentication, authorization, and security best practices.

* Debug production issues and improve application performance.

* Participate in code reviews and mentor junior developers.

* Work within Agile/Scrum development processes.

What you’ll work on

• Build features from end to end. Translate product requirements into working interfaces, backend services and database changes, and follow them through testing and release.
• Create responsive web experiences. Develop reusable React and Next.js components, connect them to APIs, and handle forms, loading states, errors and accessibility across screen sizes.
• Develop dependable APIs. Build modular Node.js services with NestJS, Fastify and related frameworks, with clear contracts, input validation, authentication, authorization and consistent error handling.
• Design and improve data models. Work with PostgreSQL and MySQL for relational data, MongoDB for document models and Neo4j for connected data. Write efficient queries, use appropriate indexes and manage schema changes carefully.
• Integrate systems and workflows. Connect third-party services and internal APIs, manage asynchronous operations, and account for failures, retries and data consistency.
• Make quality part of delivery. Write meaningful unit and integration tests, review code, reproduce bugs and document API behavior and technical decisions.
• Improve performance and security. Investigate slow pages and queries, troubleshoot service errors, and apply secure coding practices to protect application data.
• Work closely with the team. Discuss trade-offs with designers and developers, break work into manageable tasks, and communicate progress and blockers clearly.

What you’ll bring

• A solid understanding of JavaScript or TypeScript, asynchronous programming and how web applications communicate over HTTP.
• Hands-on experience building React or Next.js interfaces and Node.js APIs, with familiarity with NestJS, Fastify or similar frameworks.
• An understanding of SQL, database relationships and querying, along with an interest in document and graph databases.
• Comfort with Git, code reviews, debugging and testing your work before handing it over.
• A practical approach to problem-solving, willingness to learn and ownership of the features you build.

Bonus skills

Helpful experience, rather than prerequisites for applying.

• CI/CD pipelines: Automating builds, checks, tests and deployments, working with environment-specific configuration, and understanding release and rollback workflows.
• Jenkins: Creating or maintaining Jenkinsfiles, organizing pipeline stages, handling credentials securely and diagnosing failed builds.
• AWS: Deploying or supporting applications using services such as EC2, S3 and RDS, with awareness of IAM permissions, networking and CloudWatch logs.
• Nginx: Configuring reverse proxies, routing requests to application services, setting up HTTPS, and troubleshooting timeouts, upload limits and access logs.

About the Role

SwitchKart is on a mission to make technology more accessible and more sustainable — we're in the business of recommerce, giving old smartphones a second life, cutting down e-waste, and extending the lifecycle of every device we touch.

We're looking for a Senior Full Stack Developer to help us build and scale the ecosystem of platforms powering this mission — from our procurement app to our retailer app, pricing engines, and warranty systems. You'll take ownership of complex features end-to-end, mentor junior engineers, and make architectural decisions that shape how we grow.

What You'll Do

• Own Features End-to-End: Design, build, and ship full stack features across our procurement, retailer, pricing, and warranty platforms — from database schema to UI polish.

• Drive Architecture: Make key technical decisions on system design, scalability, and code structure as our ecosystem of apps grows.

• Build AI-First: Design and build systems with AI at the core — not bolted on. Think about where AI can automate, assist, or enhance the products you're building from day one.

• Build Scalable Architecture: Build and monitor a highly performant, failure-resistant platform — we take pride in doing this with a small, high-ownership team.

• Automate and Integrate: Develop tools that automate our integration processes and build data pipelines across our app ecosystem.

• Foster Technical Excellence: Champion unit and integration testing and lead meaningful code reviews across the team.

• Prototype and Validate: Create interactive prototypes to prove out technical concepts and participate in pilots for new initiatives.

• Mentor the Team: Guide junior developers through code reviews, pairing, and technical direction.

• Report Upward: Provide regular updates to management on milestones, risks, issues, and mitigation plans.

• Collaborate Cross-Functionally: Work closely with product and design to translate requirements into robust technical solutions across multiple products.

What We're Looking For

Must Have

• 4+ years of full stack development experience

• Strong proficiency in React and Node.js

• Solid experience with PostgreSQL or MySQL — schema design, query optimisation

• Experience designing and scaling production systems

• Experience deploying and managing applications on a cloud platform (AWS/GCP or similar)

• Comfortable owning a feature from concept to deployment

• Strong debugging and problem-solving skills

Good to Have

• Experience mentoring or leading junior engineers

• Track record of driving scalability and time-to-market in past cloud architecture decisions

• Exposure to CI/CD pipelines

• Experience with Docker, NoSQL databases, or distributed caching

• Experience integrating third-party REST/SOAP APIs

• Experience in a fast-moving startup environment

Why SwitchKart

• Real ownership over architecture and technical direction.

• Access to the latest AI coding agents and tools — we invest in keeping our engineers on the cutting edge.

• Work on a genuinely differentiated business with measurable impact.

• Be part of a lean team where your decisions shape the product.

• Opportunity to mentor and grow the engineering team.

We are looking for an experienced Senior Full-Stack Developer to join our engineering team in Hyderabad. This is a hands-on role for someone with strong experience in Node.js, Angular, PHP, MySQL, and Redis, along with working knowledge of Python, API development, automation testing, third-party integrations, and modern engineering practices.

The ideal candidate should be comfortable owning features end-to-end across frontend, backend, APIs, databases, integrations, testing, and production support.

Key Responsibilities

· Design, develop, test, and maintain scalable web applications using Node.js, Angular, PHP, MySQL, and Redis.

· Build and integrate REST APIs, third-party platforms, external services, and multiple service providers.

· Work with Postman for API development and testing, Playwright for end-to-end automation testing, and Python for scripting or supporting services.

· Troubleshoot application, API, database, integration, and production issues.

· Participate in technical design, architecture discussions, code reviews, and mentoring.

· Write clean, secure, maintainable, and well-tested code with a focus on performance and scalability.

Required Skills & Experience

· 5+ years of professional software development experience.

· Strong hands-on experience with Node.js, Angular, TypeScript, PHP, MySQL, and Redis.

· Strong experience with REST APIs, third-party integrations, external systems, authentication, and API security.

· Good working knowledge of Python, Postman, Playwright, Git, HTML, CSS, and JavaScript.

· Experience with database design, SQL optimization, caching, debugging, unit testing, and production troubleshooting.

· Good understanding of software architecture, application security, performance, scalability, and maintainability.

· Strong problem-solving, ownership, and communication skills.

AI-Assisted Development

We are looking for developers who actively use modern AI tools such as GitHub Copilot, ChatGPT, Claude, Cursor, or similar tools to improve development speed and quality.

Candidates should be comfortable using AI for coding, refactoring, debugging, testing, understanding existing codebases, API/SQL development, documentation, code reviews, and automating repetitive tasks, while maintaining strong engineering judgment, security, and code quality.

Good to Have

Experience with CI/CD, AWS/Azure, microservices, Linux, and monitoring/logging tools would be an advantage.

What We Are Looking For

We are looking for a strong hands-on engineer who can independently own technical problems, work across the full stack, contribute to architecture decisions, and collaborate effectively with an international team.

The candidate must be willing to work from our Hyderabad office during UK business hours.

We are looking for an experienced Full Stack Developer to join our in-office engineering team in Hyderabad. You will build and maintain scalable, secure, multilingual web and mobile-facing products end to end — from intuitive front-end interfaces to robust back-end services and APIs.

Key Responsibilities

• Design, develop, and maintain front-end (React.js) and back-end (Node.js/Express.js) components.
• Build and integrate secure REST APIs and manage databases (MongoDB / SQL).
• Write clean, testable, well-documented code and participate in code reviews.
• Collaborate with product, design, and QA teams to ship features on schedule.
• Optimise applications for performance, scalability, and security.
• Troubleshoot, debug, and resolve production issues.

Requirements

• 3–10 years of hands-on full-stack development experience.
• Strong proficiency in React.js, Node.js, JavaScript/TypeScript, and REST APIs.
• Solid experience with databases (MongoDB and/or SQL) and version control (Git).
• Good understanding of responsive design, security best practices, and cloud deployment.
• Strong problem-solving skills and the ability to work on-site in a collaborative team.

What We Offer

• Competitive salary
• Opportunity to work on a fast-growing, cross-border product.
• A collaborative, in-office team environment in Hyderabad.

Role Description

Software Engineer is a full-time role based in Hyderabad with Onsite work arrangement. This role involves designing, developing, and maintaining back-end services and APIs, ensuring high performance, scalability, and security across platforms. The engineer will participate in architecture discussions, code reviews, and technical decision-making, collaborating closely with product owners, QA, and cross-functional teams. Daily responsibilities include writing clean, maintainable code, troubleshooting complex issues, improving system performance, and contributing to best practices, documentation, and engineering standards. The role also includes mentoring less experienced engineers and supporting continuous improvement in development processes and tooling.

Key Requirements/Skills

4-7 years of overall experience in software development with strong expertise in building scalable web & mobile applications.

• Strong technical decision-making ability, including architecture design, technology selection and implementation of best practices.
• Front-end expertise: Strong experience in React, JavaScript, TypeScript, NextJS and building responsive and user-friendly UI/UX.
• Back-end development: Hands-on experience with Node.js, Express JS, Nest JS, RESTful APIs, API design, and server-side architecture.
• Databases : Good Hands on Exprience in both SQL(PostgreSQL Preferred) & No SQL Databases
• Gen AI Expertise: Experience in building RAG & LLM Systems, implementing AI/ML models and integrating AI-based solutions to solve business problems. Expereince with Langchain, langgraph and Vector DBs, Voice AI(STT, TTS) Models and experience in using Open AI Tools (Calude, Cursor, etc.)
• Cloud & DevOps exposure: Experience with AWS/Azure, understanding of CI/CD pipelines, and cloud-based deployments.
• Code quality & best practices: Experience in code reviews, Git version control, and ensuring maintainable and secure code.
• Team leadership: Ability to mentor developers, guide technical discussions, and collaborate across teams.
• Strong communication skills to effectively interact with technical and non-technical stakeholders.
• Experience working in high-compliance environments such as healthcare systems is a plus.
• Certifications in AWS & Other skills and technologies will be an added advantage.

Educational Qualification

• B.Tech / M.Tech in CSE/IT/AI&ML only from a recognized university/college.