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.

Techtinium is looking for an ambitious Senior Full Stack Developer to join our team in Chennai. You will be part of a cross-functional team responsible for developing new features and functionality for an asset management SaaS platform — including integrations, performance work, and ongoing maintenance.

You will work closely with the Head of Product, CTO, and UI/UX designer to deliver high-quality solutions that meet customer expectations.

This is a role with real influence - you will contribute to platform architecture decisions and have an opportunity to shape

the long-term technical direction of the product.

Key Responsibilities

● Collaborate with UI/UX designers, the Head of Product, and CTO to translate

customer requirements into production-ready implementations

● Drive development of new platform features and functionality end-to-end

● Contribute to architectural discussions and actively improve the platform's

technical foundations

● Build and maintain integrations with third-party services and APIs

● Write clean, modular, loosely coupled code with an emphasis on quality and

long-term maintainability

● Participate in code reviews and uphold engineering best practices across the

team

● Take ownership of implementation projects independently when required

Required Skills

● Excellent command of PHP, Go, and modern JavaScript — particularly Remix /

React Router

● Strong proficiency in TypeScript and CSS / CSS preprocessors

● Solid understanding of OOP and functional programming patterns

● Excellent knowledge of RESTful API design and GraphQL

● Strong working knowledge of PostgreSQL and relational database design

● Strong experience with Git and version management workflows

● Experience with event buses such as Apache Kafka or RabbitMQ

● Hands-on experience with Docker and Kubernetes

● Excellent written and oral communication skills in English

Desired Skills

● Experience with PHP frameworks: Laravel, Symfony, or Slim

● Familiarity with SSO and OAuth implementation

● Working experience with Linux environments

● CI/CD experience

● Comfortable with agile methodologies and iterative delivery

Who you are

● You are motivated by quality and customer satisfaction — you care how the work

lands, not just that it ships

● You are passionate about writing modular, maintainable, loosely coupled code

● You are a fast learner who applies new knowledge to improve existing systems

rather than starting from scratch

● You are a collaborative team player, yet fully capable of independently driving a project to completion

About Techtinium

Techtinium is a product engineering company helping customers across the globe build technology products that serve millions of users. We design, build and deploy software and AI products across a range of industries including manufacturing, enterprise, healthcare, e-commerce, and digital content. Over the years, some of our client engagements have grown into dedicated product companies of their own. We are a team of expert product designers, developers and research engineers working with customers across the globe, giving us an opportunity to experience diverse industries, cultures, and ways of thinking.

Responsibilities

- To analysis business requirements, prepare design and implementation recommendations and estimate development effort

- Collaborate with cross-functional teams to define, design, and ship new features

- Lead or participate in design reviews, code reviews and architecture evolution discussions

- Unit-test code for robustness, including edge cases, usability, and general reliability

- Work on bug fixing and improving application performance

- Continuously discover, evaluate, and implement new technologies to maximize development efficiency

Required Skills

- Experienced with front end programming language with React JS.

- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.

- Thorough understanding of React.js and its core principles.

- Experience with popular React.JS workflows (such as Flux or Redux)

-Expereince on .Net Core

-Experience in database MS SQL

About Us:

We’re looking to hire someone to help scale Machine Learning and NLP efforts at Episource. You’ll work with the team that develops the models powering Episource’s product focused on NLP driven medical coding. Some of the problems include improving our ICD code recommendations , clinical named entity recognition and information extraction from clinical notes.

This is a role for highly technical engineers who combine outstanding oral and written communication skills, and the ability to code up prototypes and productionalize using a large range of tools, frameworks, and languages. Most importantly they need to have the ability to autonomously plan and organize their work assignments based on high-level team goals.

What you will do at Episource:

You will be responsible for setting an agenda to develop and build machine learning platforms that positively impact the business, working with partners across the company including operations and engineering. You will be working closely with the machine learning team to design and implement back end components and services. You will be evaluating new technologies, enhancing the applications, and providing continuous improvements to produce high quality software.

Required Skills:

• Strong background in analytics, BI or data science deployments is preferable with 2-6 years of experience

• Knowledge of React/Vue, HTML, CSS

• Experience building and consuming APIs 

• Experience with MySQL, MongoDB and MEAN stack 

• Knowledge and experience with serverless architectures is a plus

• Hands-on experience with AWS or any major cloud service provider for deploying solutions

• Experience with Docker or Kubernetes in deploying solutions on the cloud

• Hands-on experience Python, Apache Spark & Big Data platforms to manipulate large-scale structured and unstructured datasets.

• Fluent in data fundamentals: SQL, data manipulation using a procedural language, statistics, experimentation, and modeling

• Java,Jdbc,J2ee,Ajax,jquery,Spring,Hibernate, Restful Web Services, JAVASCRIPT, HTML, CSS 
• T-SQL and PL/SQL 
• Strong experience in core java 
• Experience in OOAD frameworks, Spring Integration, Hibernate, JSP, Tiles, Applets, Servlets 
• Extensive development experience with PL/PGSQL (PostgreSQL) 
• Good experience in code optimization, performance tuning, debugging 
• Web/App server: TOMCAT/JBOSS/WAS 
• Knowledge of OOPS concepts, SDLC, and design patterns 
• Good Analytical ability and Problem Solving Skills 
• Good communication skills in both written and verbal 
• Java Certification will be an added advantage 

The ideal candidate will be responsible for developing high-quality applications. They will also be responsible for designing and implementing testable and scalable code.

Responsibilities :

• Work with development teams and product managers to ideate software solutions

• Maintenance of Node.js Backend

• Working with MongoDB to create various features

• Troubleshoot, debug and upgrade software

• Create security and data protection settings Requirements

• Proven experience as a backend developer in Node.js or similar role

• Experience developing desktop and mobile applications

• Familiarity with common stacks

Requirements :

• Hands on experience building end to end systems

• Minimum 1 yrs of experience with Javascript, Node.js and Mongo.DB

• Good architectural & design skills

• Strong coding, data structures and algorithms

• The ability to own end to end responsibility - right from requirement to release

• The ability to produce bug-free and production grade code

• Experience and fine understanding of cross browser front end development issues

• Exhibit a deep understanding of server virtualization, networking and storage ensuring that the solution scales and performs with high availability and uptime

Full-Stack Developer

Are you a cricket enthusiast who also loves to build world-class
technology products?

CricHeroes is looking for an All Rounder Full Stack Developer, who is passionate about scaling up India's one of a kind niche B2C platform and the pulse of the nation - Cricket!

This might be a great opportunity for you if

• You are an action and result oriented highly driven person who aspires to be part of a team that is scaling up a successful B2C product.
• You are an analytical problem solver with strong Node.JS knowledge and a passion for teamwork and innovation
• You have hands-on experience in designing and developing applications and object-oriented analysis and design using common
• design patterns.

Who are we?
CricHeroes is the world's largest Cricket Network with more than 7 Million
users. It helps local cricketers showcase their talent, get recognition and
improve their game with data.

What are we looking for, in you?

• You are an ambitious problem solver who is constantly learning and
• updating yourself with the latest technology and an expert in
• technology development.
• In-depth knowledge of Node.js and used it for product development in a B2C fast-paced product company for 2-6 years
• Strong analytical skills and problem-solving aptitude
• Attention to details
• You have demonstrated a track record in delivering ambitious targets.
• You believe in teamwork.
• You have a Bachelor's degree in Computer Science (or Equivalent).
• Mandatory Technical background: Node.js, Javascript, MySQL, MongoDB, Redis
• Preferable skills in AWS, Big Data, Analytics, Google Cloud.

What are we looking for, from you?

• You will write well-designed, testable, efficient code.
• You will ensure the code and designs are in compliance with specifications as developed.
• You will prepare and produce releases of the software platform and support continuous improvement by investigating alternatives and technologies.
• Work as part of a team developing applications and services using Agile development methods
• Contribute to team and organizational improvements in process and infrastructure
• Build customer-facing UI and back-end services
• Code, test and operate node.js based services
• Effectively use tools and ingenuity to identify and fix defects before they become a problem
• A good Stackoverflow profile is a big plus.

We are made in India by the passionate cricketers for the passionate cricketers of the world!

If this excites you and you want to be part of our team to help us win the
scores by building a one-of-a-kind app for all the cricketers around the
world, please apply here.

• Design and construction of platform with the best possible encryption and security mechanisms
• Compare different design options and take technology-driven design decision
• Define Data model/Information model
• Define services and convert functional requirements to design
• Define APIs and implement them
• Build front end based on user experience design
• Test and Debug as required
• Write Technical Documentation
• Optimize code and design for Performance
• Design and implementation of continuous integration and deployment pipelines

Expected Qualifications and Key Skills

• Working experience in Spring, Spring-boot or equivalent, Hibernate or equivalent persistence framework.
• Working experience of No SQL databases such as MongoDB or equivalent
• Working experience of setting up Production environment including SSL certificates, logging, backup, archival, etc.
• Working experience of JavaScript frameworks such as React JS, JQuery, etc.
• Working experience of API gateways and Web services such as REST
• Working experience of using GIT
• Working experience of a dev-ops tool such as Jenkins
• Deployment experience on Azure/AWS
• Microservices design and development
• Excellent understanding of Data Structures and Algorithms
• Understanding of OOP and Design Patterns
• Works well in a team setting
• Can multitask, adapt to shifting priorities, detail-oriented
• Good work ethic, including a sense of individual responsibility
• Comfortable working on changing requirements in a growing company
• Must be analytical, flexible, innovative, and self-motivated
• Experience with payment platforms and processors would be a plus