
Job Title: MERN Stack Developer (5+ Years Experience)
Position: MERN Stack Developer
Location: Ahmedabad (On-Site)
Onshore Opportunity
Experience: 5 to 7
Joining: Immediate Joiners Preferred
Employment Type: Full-Time
About the Role
We are seeking a talented and experienced MERN Stack Developer to join our on-site team. As a key member of our development team, you will be responsible for building and maintaining high-performance web applications using MongoDB, Express.js, React.js, and Node.js.
Key Responsibilities
- Develop and maintain scalable, responsive web applications using the MERN stack
- Write clean, efficient, and well-documented code
- Integrate APIs and third-party services
- Work closely with UI/UX designers, QA, and product teams
- Optimize applications for maximum speed and scalability
- Perform code reviews and provide constructive feedback
- Debug and resolve technical issues and bugs
- Ensure cross-platform and cross-browser compatibility
Required Skills & Qualifications
- 5+ years of professional experience with the MERN stack
- Strong proficiency in JavaScript, ES6+, HTML5, and CSS3
- In-depth experience with React.js (including hooks, Redux, component lifecycle)
- Strong backend development skills using Node.js and Express.js
- Proficient in working with MongoDB, including aggregation, indexing, and schema design
- Experience with RESTful APIs and JSON
- Familiarity with Git and version control workflows
- Strong problem-solving and debugging skills
- Excellent communication and teamwork abilities
Must-Have Experience
- 5+ years working professionally with the MERN stack
- Has experience in a team lead role
- Expertise in JavaScript (ES6+), HTML5, CSS3
- Deep understanding of React.js (Hooks, Redux, lifecycle)
- Backend development with Node.js & Express.js
- Strong hands-on with MongoDB (schemas, indexing, aggregation)
- API integration, Git, version control, and debugging
Preferred Qualifications
- Experience with deployment on AWS, Heroku, or similar cloud platforms
- Familiarity with containerization tools like Docker
- Experience with testing frameworks such as Jest or Mocha
- Knowledge of agile methodologies

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Experience: -
* Minimum 2 year of coding experience in ReactJS (TypeScript), HTML, CSS-Pre-processors, or CSS-in-JS in creating Enterprise Applications with high performance for Responsive Web Applications.
* Minimum 2 year of coding experience in NodeJS, JavaScript & TypeScript and NoSQL Databases.
* Developing and implementing highly responsive user interface components using React concepts. (self-contained, reusable, and testable modules and components)
* Architecting and automating the build process for production, using task runners or scripts
* Knowledge of Data Structures for TypeScript.
* Monitoring and improving front-end performance.
* Banking or Retail domains knowledge is good to have.
* Hands on experience in performance tuning, debugging, monitoring.
Technical Skills: -
* Excellent knowledge developing scalable and highly available Restful APIs using NodeJS technologies
* Well versed with CI/CD principles, and actively involved in solving, troubleshooting issues in distributed services ecosystem
* Understanding of containerization, experienced in Dockers, Kubernetes.
* Exposed to API gateway integrations like 3Scale.
* Understanding of Single-Sign-on or token-based authentication (Rest, JWT, OAuth)
* Possess expert knowledge of task/message queues include but not limited to: AWS, Microsoft Azure, Pushpin and Kafka.
* Practical experience with GraphQL is good to have.
* Writing tested, idiomatic, and documented JavaScript, HTML and CSS
* Experiencing in Developing responsive web-based UI
* Have experience on Styled Components, Tailwind CSS, Material UI and other CSS-in-JS techniques
* Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
* Writing non-blocking code, and resorting to advanced techniques such as multi-threading, when needed
* Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
* Documenting the code inline using JSDoc or other conventions
* Thorough understanding of React.js and its core principles
* Familiarity with modern front-end build pipelines and tools
* Experience with popular React.js workflows (such as Flux or Redux or ContextAPI or Data Structures)
* A knack for benchmarking and optimization
* Proficient with the latest versions of ECMAScript (JavaScript or TypeScript)
* Knowledge of React and common tools used in the wider React ecosystem, such as npm, yarn etc
* Familiarity with common programming tools such as RESTful APIs, TypeScript, version control software, and remote deployment tools, CI/CD tools
* An understanding of common programming paradigms and fundamental React principles, such as React components, hooks, and the React lifecycle
* Unit testing using Jest, Enzyme, Jasmine or equivalent framework
* Understanding of linter libraries (TSLINT, Prettier etc)
Functional Skills: -
* Experience in following best Coding, Security, Unit testing and Documentation standards and practices
* Experience in Agile methodology.
* Ensure quality of technical and application architecture and design of systems across the organization.
* Effectively research and benchmark technology against other best in class technologies.
Soft Skills: -
* Able to influence multiple teams on technical considerations, increasing their productivity and effectiveness, by sharing deep knowledge and experience.
* Self-motivator and self-starter, Ability to own and drive things without supervision and works collaboratively with the teams across the organization.
* Have excellent soft skills and interpersonal skills to interact and present the ideas to Senior and Executive management.

- Hands-on expertise in managing technical teams and work closely with business stakeholders
- Should be familiar with card testing and POS ecosystem.
- Experience with designing APIs and building platform integrations in Commerce, POS, FinTech and Payments
- Payment’s domain experience.
- Extensive experience on Base24 & SWITCH part for payment format.
- Exposure on ISO8583 Messaging system.
- API understanding and creation.
- Working knowledge on cryptographic algorithms (RSA, EC, AES, SHA variants), TLS/SSL protocols. C Symetric and A symetrics, K.M.S.
- Digital Payments technical knowledge - QR/ POS/ UPI/ BQR
- Understanding of CI/CD pipelines, Kubernetes, containerization, Docker
- Must have strong technical skills in Android APK and iOS development Concept and Web services.
- Supportability, monitoring, ops in general.
- Accurate cost models to deploy and operate
- Extensive experience in TLOG’s, data integration with downstream applications, and impact of POS changes on different financial, legal, compliance, loss prevention, etc. applications.
- Extensive experience with payment systems 7861 (EMV, payment middleware, encryption, tokenization, settlement, offline scenarios,).
- Extensive experience with different types of payment methods including credit, debit, gift cards (Both closed loop and open loop), PLCC, PayPal, AliPay, checks, etc. as well as different payment form factors like Tap N Go, contactless, swipe, EMV, Mobile, etc.
- Extensive experience with payment devices (pin pads, printers, registers, scanners).
- Experience in Node.js / Java / Python, building REST APIs, with experience/exposure to front end stack like JavaScript & React / Angular.
- Experience with Storage systems - RDBMS, NoSQL (Cassandra/MongoDB), Redis/Memcache/Aerospike.
- Experience in messaging tools like Kafka/AWS Kinesis etc...
- Design expertise for performance, scalability, fault tolerance and high availability
Technical Competencies Required:
- Experience with POS systems and Payments domain.
- Demonstrated experience for systems architecture, design, and integration for POS systems
- Java and/or Node.js. Experience building micro services (REST APIs) using Node.js
- Experience with one or more RDBMS databases like MySql, PostGreSQL
- Experience with one or more NoSQL databses like MongoDB, Cassandra, DynamoDB, Aerospike, Elastic Search, Redis, neo4j etc.,
- Caching technologies like: Redis, Elasticache,
- Cloud Providers like: AWS/ Google Cloud / Azure
- CI / CD : Jenkins, Docker, Kubernete
Required Skills
1) Good experience in React/Angular
2) Hand on Node.JS./Express JS
3) Database : MYSQL/MongoDB
4) Experience in Java Script, Typescript.
5)Good experience in HTML5, CSS3, JavaScript, Jquery
6) Experience working in an Agile environment.
7) Good communication skills.
1) You will be building and maintaining an internal application used by our fundraising,
marketing and accounting teams. This is very different from building an application for
millions or even thousands of users.
2) The cycles are short - there are no wire frames,no UML diagrams, no TDD / BDD, and no hand-wringing over 41 shades of blue. Bugs will be fixed as soon as they are reported and user feedback will be incorporated quickly.
3) You may build a feature which gets used for two weeks and is then thrown
away. The application as a whole will be used indefinitely i.e. this is not until we get
something else.
4) Safeguard client data.
5) Listen to your colleagues and understand their requirements.
6) Develop new features for our web application and Test the features you develop.
7) Fix bugs found regardless of who introduced them.
8) Follow and improve the deployment process
9) Log, and read the logs.
10) You will occasionally be expected to describe your code in words
Position Details:
Role: JavaScript Developer
Reports to: Director - Technology
Location: Bengaluru, India
Type of contract: 12 months full-time consultancy contract
Salary: As per Industry standards
About Us:
Avarna derived from Sanskrit means one with a fun loving nature but having no form, no color, or marks. We at Avarna Capital solve the most interesting questions in sports analytics. Diligence, productivity and transparency defines the work culture at Avarna. We are a team of
highly motivated and innovative people all working remotely so emphasis on communication, accessibility, and accountability are our key focus to build a strong culture at Avarna.
Resposibilities:
1. Migration of company's current infrastructure from Monolithic to Microservices
2. Recommeded appropriate solutions to enhance the current software stack
3. Utlizing the latest and most innovating technology in solving business problems
4. Take ownership of project delivery and entire SDLC
- Full Stack developer (Java/JavaScript): (experience 3 to 6 years)
- Experience in designing multithreaded/concurrent/distributed systems.
- Experience in Java/Kotlin or JavaScript is required (3+ years).
- Experience in working on scalable non-blocking server side frameworks like Spring stack(2+ years)
- Experience with both SQL and NoSQL databases, Message brokers. ex: Postgres/MySQL, MongoDB/DynamoDB/Redis/Neo4j, Kafka (2 +years)
- Experience in Front end language and frameworks. JavaScript, must be an expert in one of the front end frameworks (ex: React) (2+)
- Understand cloud technologies and should have deployed applications or products in popular cloud platforms like AWS, GCP, MS Azure, etc (2+ years).
Optional:
- Experience with BigData is a big plus
- Knowledge of functional programming principles is a plus.
- Experience in HTML5 and CSS3
Skills and Expectations
We are looking for terrific JavaScriptFull Stack Engineers who can contribute in all the aspects ofan applicationdevelopment.You will be primarily working with the product team of ORMAE so we expect you to lead with a vision.
•Strong experience in building smooth UI/UX workflows to satisfy the business requirements.
•Should be familiar with logging and monitoring tools like Loki/EFK, Prometheus, Sentry, Grafana.
•Strong knowledge in NodeJS, Functionalprogramming, SDLC (Software development Life cycle). Should be able to write both synchronous and asynchronous code using NodeJS.
•Must be proficient in GIT.
•Experience is creating CI/CD pipelines.
•Experience with working on Linux based servers.
•Should have experience with both SQL and NoSQL databases.Experience with in-memory databases like Redis is a plus.
•Should have Angular and Reactknowledge. Experience with web workers and building drag-drop web interfaces is a bonus and calls for extra points.
•Shouldbe able to designa database schema for any given problem statement
.•Hands on experience in developing serverless architecture is a must.
•Knowledge in deployment using Docker, Docker Swarm, Kubernetesand how containerized applications work is a must.
•Experience in dealing with third party API’s.






