Performance Engineer (Fullstack-Performance optimization)

Position : Full Stack Developer (Node.js + React.js)

Experience : 5+ Years

Location : Gurgaon (Work From Office - 5 Days)

Notice Period : Immediate or within 7 days

Job Description :

We are looking for a highly skilled and passionate Full Stack Developer with strong experience in Node.js and React.js, and a solid understanding of Microservices Architecture.

This is a full-time, on-site opportunity based in Gurgaon, ideal for someone who thrives in a fast-paced development environment.

Mandatory Skills :

Node.js, React.js, JavaScript (ES6+), RESTful APIs, Microservices Architecture, MongoDB/PostgreSQL, Git, HTML5, CSS3, JWT

Key Responsibilities :

• Design, develop, test, and maintain scalable web applications using Node.js (backend) and React.js (frontend).
• Build and integrate RESTful APIs and Microservices in a production-grade environment.
• Participate in code reviews, architecture discussions, and performance optimizations.
• Collaborate with cross-functional teams including UI/UX designers, QA, DevOps, and product managers.
• Write clean, maintainable, and reusable code adhering to best practices.
• Ensure system reliability, security, scalability, and performance.
• Debug and resolve production issues efficiently.

Must-Have Skills :

• 5+ Years of full-stack development experience with Node.js and React.js.
• Strong expertise in JavaScript, ES6+, HTML5, CSS3, and responsive design.
• Solid hands-on experience in Microservices Architecture and containerized services (Docker, Kubernetes is a plus).
• Proficiency in RESTful API development and integration.
• Experience with databases such as MongoDB, PostgreSQL, or MySQL.
• Familiarity with version control tools like Git and CI/CD pipelines.
• Understanding of Agile/Scrum methodologies.

Good to Have :

• Knowledge of authentication/authorization mechanisms (OAuth, JWT).
• Exposure to cloud platforms like AWS, Azure, or GCP.
• Familiarity with testing frameworks such as Jest, Mocha, or Cypress.

• Develop frontend components on ReactJS with Redux as state management library
• Should have good knowledge of tailwind CSS
• Must have expertise in JavaScript, ES6, React-Redux, HTML/CSS
• Familiarity with build tools such as Webpack, Babel
• Experience with testing tools such as Jest
• Experience in web security and performance on mobile and desktop
• Familiarity with Git.
• Should be able to make mobile responsive designs
• Knowledge on PWA would be an added advantage

• Develop backend APIs on Express.js and NodeJS
• Should be good with SQL database and perform DDL,DRL,DQL,DCL on database ,preferably PostgresDb.
• Should have familarity with ORM such as sequilize.
• Knowledge on server-less architecture is good
• Experience with monitoring tools web performance and caching techniques
• Experience working in agile methodology projects
• Should have knowledge of design patterns, design practices
• Should have the ability to design and write reusable code
• Ready to work in a challenging and fast-paced environment
• Experience in building Cloud Native applications
• Experience in test-driven development

• Responsible for the successful technical delivery of code and design documents
• Responsible to evaluate and review design frameworks and methodologies.
• Responsible for organizing, documenting, and review work items scope from a technical point of view.
• Responsible for scoping, designing, development, reviews, and complete delivery from the technical end.
• Review and validate estimates for complex projects to ensure correct sizing of work.
• Participates in POCs, validates the complex technical solution, performs estimates and collateral consolidation.
• Lead and coach a team of junior developers

Requirement

• Strong experience in the development of microservices-based applications using JEE technologies Spring Boot, and Spring MVC, JPA, and Hibernate.
• Experience in handling integration with multiple legacy systems by creating/consuming services in SOAP/REST/MQ, Apache Camel integration framework.
• Strong experience in developing web applications using single-page architecture and a responsive design using Angular, Bootstrap, and building hybrid mobile applications
• Understanding of front-end technologies, such as HTML5, and CSS3
• Containerizing applications using Docker/Kubernetes
• Setting up CI/CD pipelines using GIT, Jenkins, SonarQube is a plus
• Setting up applications for log monitoring using ELK stack and performance monitoring using Prometheus and Grafana is a plus
• Ensure quality and timeliness of implementation of activities related to design, build and implementation of work product; participate in activities related to requirements elicitation, validation of architecture, creation, and review of design; provide pseudo code to the team; assign and review tasks for work product implementation with the objective of ensuring the highest levels of service offerings in own technology domain
• Performs high and low-level design provides pseudo-codes, implements the prototype, and does design reviews in order to deliver design documents as per customer requirements
• Provides inputs for an overall implementation plan, lead deployment of applications, infrastructure, and post-production support activities
• Interface with customer for issue resolution, provide status updates, Build customer confidence in team`s ability to deliver in order to support high customer satisfaction
• Understand client-side business requirements and provide value-led solutions. Should have strong and clear verbal and written communication skills including addressing escalations, presenting status in management meetings. Excellent client interfacing skills, mentoring skills
• Experienced in developing microservices/APIs using REST principles
• Experienced in JEE technologies, Spring Boot, Spring MVC, Hibernate, Swagger
• Experienced in using Queues (ActiveMQ/RabbitMQ, Kafka) and integration frameworks like Apache Camel
• Experienced in Front End skills include Angular, CSS, SAAS, Node, NPM, Bootstrap
• Experience with one of the application servers like Tomcat, JBoss EAP, IBM WebSphere
• Experience with relational databases like Postgres, Oracle DB2, and NoSQL databases like Elastic Search, MongoDB, Neo4J
• Experience in containerizing applications using Docker/Kubernetes
• Experience in setting up CI/CD pipelines using GIT, Jenkins, SonarQube is a plus
• Experience in setting up applications for log monitoring using ELK stack and performance monitoring using Prometheus and Grafana is a plus

We believe that great change begins with individuals who are given the freedom to make a difference, and we champion this in all that we do here at Vamstar. Hence we are urgently looking to hire a senior person to fill in for a Full Stack Engineer

The ideal candidate will be responsible for developing high-quality applications along with designing and implementing testable and highly scalable codes. If you have a gig towards Java, Node, AWS, Javascript and Typescript and have worked extensively in web application development; we are looking for you.

Responsibilities

• Managing team(s)
• Develop quality software and web applications
• Analyze and maintain existing software applications
• Design highly scalable, testable code
• Discover and fix programming bugs

Qualifications

• B.Tech - CS from a Tier 1/2 college
• Minimum 5 years of experience
• Great communication skills

Key Benefits 

• Performance Bonus on a Quarterly basis on performance 
• 25 days paid holidays each year including your accrued leaves, sick leaves, fixated and optional holidays. 
• Flexible working hours 
• Permanent Work from home 
• Yearly virtual cross-tribe pollinations (we have another engineering team in UK, US and Vietnam) 
• Wholesome development experience with MacBook Pro and extra monitor(s) post completion of Probation period/ machine bonuses 
• Regular and transparent appraisals based on performance. 

More about our Team: As an engineering team, we are dedicated, hardworking and always looking to learn and improve our craft. This happens in regular knowledge sharing sessions with both Full Stack and Machine Learning teams, and we are always keen to collaborate when a challenging problem comes up. In our work, we use industry best practices like Github. AWS, Ally, Trello, Slack, TDD, CI/CD and code reviews as part of building every feature. We also continually evaluate new technologies to see if they can help improve our platform.  

• Developer with 3-5 years of well-proven experience in Web UI & middleware REST API development using NodeJS and ReactJS
• Must be well versed with using anonymous functions, Prototypes, Call-back functions, promises in Node JS
• Experience in ReactJS component lifecycle and Redux
• Must be able to create and consume data from REST services.
• Experience in Babel and Webpack
• Must be familiar with Github and GitLab
• Must have strong experience in MYSQL, Postgres relational databases and MongoDB.
• Experience in HTML5, CSS3, SASS, LESS is an added advantage
• Experience in GCP, Azure, AWS cloud technologies is an added advantage
• Familiarity with continuous integration