Senior Backend Developer

Job Title: Principal Backend Engineer

Experience: 7+ Years

Location: Panchkula (Onsite)

📍 Office will move to IT Park, Chandigarh from February

Work Mode: Onsite | 5 Days a Week

About the Role

We are looking for a Principal Backend Engineer to architect, scale, and lead the development of robust backend systems. This is a hands-on leadership role where you’ll drive technical decisions, mentor engineers, collaborate closely with clients and product teams, and help modernize platforms using scalable architectures and emerging technologies, including AI/ML where relevant.

Tech Stack

• Backend: PHP (Laravel / CodeIgniter), Node.js
• Databases: MySQL, MongoDB
• Architecture: Microservices / Modular Monolith
• Cloud (Good to Have): AWS / GCP

Key Responsibilities

Backend Architecture & Development

• Own and evolve backend architecture across PHP and Node.js services
• Design and review scalable, maintainable systems (microservices or modular monoliths)
• Manage and optimize integrations across MySQL and MongoDB (data modeling, indexing, performance tuning)

Technical Leadership

• Lead system design discussions, architecture reviews, and code quality initiatives
• Establish backend development standards, best practices, and documentation
• Mentor mid and senior engineers on design patterns, testing strategies, and CI/CD pipelines
• Drive decisions around refactoring legacy systems and platform modernization

Client & Stakeholder Communication

• Act as the technical SPOC for backend architecture and integrations
• Translate business and product requirements into technical solutions
• Explain trade-offs, constraints, and backend workflows to non-technical stakeholders
• Present PoCs and technical approaches confidently to clients

AI & ML Integration (Strategic / Optional)

• Identify backend use cases for AI such as personalization, recommendations, fraud detection, or data enrichment
• Design backend APIs, services, or cron jobs that interact with AI/ML models
• Collaborate with data teams and stay updated on AI tools/APIs (e.g., OpenAI, LangChain)

Scalability, Security & Performance

• Ensure API security, role-based access control, and rate limiting
• Optimize system performance using caching, queues, and query optimization
• Plan and support horizontal/vertical scaling on cloud infrastructure

What We’re Looking For

• 8+ years of backend development experience in PHP and/or Node.js
• Strong expertise in database design (MySQL & MongoDB)
• Proven experience leading architecture decisions and mentoring engineers
• Ability to clearly communicate technical concepts to clients and stakeholders
• Proactive mindset toward scalability, performance, and system resilience
• Bonus: Experience or curiosity around AI APIs and real-world AI integration

Why Join uEngage?

• Work on high-impact systems used by thousands of users
• Collaborate with product, design, data, and client teams
• High ownership and freedom to architect and innovate
• Competitive compensation and a collaborative work culture

Zerozilla Infotech Pvt Ltd is a team of highly creative professionals creating seamless

web solutions ranging from web designing and development, mobile application,

custom software development, and digital marketing services for businesses.

We work with B2B, B2C companies, government bodies, institution-led and independent start-ups to generate value and give them a competitive edge.

We are experts with over Six years of experience in providing comprehensive and

unified solutions to your business challenges. With over 120 active clients and 150

projects to our credit, we continue creating innovative solutions to drive business

growth. Our working process involves four crucial steps- research, brainstorming

ideas, optimization, and achieving the target.

We deliver cutting-edge technology-driven solutions for your business including

ROI-driven marketing campaigns, online branding, and communications,

customized mobile application development, and more which are designed bearing

in mind your business requirement.

Job Description: Node JS Developer ( JD 102)

No of Position : 45

• Programming in Node.js

• Experience with server-side templating languages

• Experience with Express.js, Loopback, Sails JS, Meteor.js or other

frameworks.

• Experience consuming and building robust, SOAP and REST ful APIs

• Experience with Relational Databases like Mongo DB, MySQL

• Solid understanding and extensive experience with version controltools like

Git, SVN or Mercurial

• Exceptional problem solving and ability to work independently

• Exceptional learning skills

• Understanding of Agile methodologies

• Knowledge of writing efficient codes.

• Understanding front-end applications.

• Working with authorization and authentication of the user.

• Having error-handling skills.

• Creating database schemes and many more.

• Using third party with services with developed system.

Basic Requirement

• A Bachelor’s Degree in computer Science, Computer Engineering, Electrical

Engineering or equivalent.

• Minimum of 2+ years’ Experience in Software Development Organisation

required.

• Strong Communication skill and problem solving skill

• Ability to take ownership of work stream, operate without close supervision

and work across the organisation

• Self-discipline in order to finish work on a timely basis.

About Us: 

We live in the realm of rising, ever evolving technology. From the cassette tape to nanotech skeletons, we’ve come a long way. Splitting an atom is no big deal – and who’d have thought that we’d talk through airwaves? Change is inevitable, and we’re the tide that brings it. 

At Relinns, we breathe tech solutions and embrace innovation with open arms. With over 4 years of experience, we've had phenomenal growth which acts as a testimony to the knowledge we've come to gather over time. We have been fortunate enough to get an opportunity to work with clients such as Apollo Tyres, Shahi Exports, Manchester City Football Club, etc. 

Our team is on the path of finding religion in the workplace of today. To find our way, we have three tools at our disposal: cutting edge technological tools, a meticulously dedicated work ethic, and crisp bow-tie professionalism. 

About the role:

We are looking for a Node.js Developer responsible for managing the interchange of data between the server and the client. Your primary focus will be the development of all server-side logic, definition, and maintenance of the central database, and ensuring high performance and responsiveness to requests from the client end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well.

What You Need for this Position:

• Strong understanding of JavaScript, its quirks and workarounds.
• Basic understanding of TypeScript & its quirks and workarounds.
• Advanced knowledge of NPM and the most frequently used libraries (E.g: Socket.io, Underscore.js, Passport, etc.).
• Knowledge of any Node.JS ORM (Mongoose, Sequlize, Knex, etc.).
• Understanding of any of the following Node.JS frameworks: Express JS, Koa Js, Hapi JS or any other.
• Good understanding of OOP and data structures.
• JavaScript unit testing frameworks (prefer Unit.js, Mocha).
• Ability to write complex algorithms.
• Understanding of code versioning tools, such as {GIT / Mercurial / SVN}.

What You Will Be Doing:

• Develop and provide solutions on JavaScript frameworks
• Develop high-traffic, flawless web applications using Node.JS
• Participate in code and design reviews to ensure consistency in architecture and design/code practice
• Code with performance, scalability, and usability in mind
• Work on new tools in leading industry trends, with new and emerging technologies, prototypes and engineering process improvements
• Work closely with next-generation architecture development teams using cutting edge approaches and technologies

Top Reasons to Work with Us:

• We're a small, fast-paced growing team tackling huge new challenges every day.
• Learning new concepts while working with intellectual and exceptionally talented team
• Friendly and high growth work environment
• Competitive compensation

• Developing and maintaining all server-side network components.
• Ensuring optimal performance of the central database and responsiveness to front-end requests.
• Collaborating with front-end developers on the integration of elements.
• Designing customer-facing UI and back-end services for various business processes.
• Developing high-performance applications by writing testable, reusable, and efficient code.
• Implementing effective security protocols, data protection measures, and storage solutions.
• Running diagnostic tests, repairing defects, and providing technical support.
• Documenting Node.js processes, including database schemas, as well as preparing reports.
• Recommending and implementing improvements to processes and technologies.
• Keeping informed of advancements in the field of Node.js development.

• Experienced in automated deployment tools such Continuous Integration (Azure DevOps/Git).
• Excellent debugging skills; able to debug complex technical issues involving multiple system components. Good to have knowledge on online & offline sync capabilities in Progressive Web Application (PWA) implementation.
• Knowledge on Azure DevOps is optional.
• Knowledge on INFORM, WARN and ERROR logging in Azure Application Insights, error handling, access authorization, data connectivity in C# is mandatory.
• Knowledge on publisher/subscriber queueing such as RabbitMQ.
• All C# code must contain descriptive comments to functions, or complex/nested loops, if, or case statements.
• Knowledge on NetSuite is an advantage.
• Knowledge on Azure Active Directory is an advantage. Knowledge on OAuth 2.0 & JWT Tokens is mandatory. Writing high-level design and technical analysis documents.
• Should have worked on Agile framework

1. Strong Experience on. NET Core, . NET Microservices, C# 5.0 Xunit - Unit Test Framework - C#, Entity Framework/Entity Framework and RESTful Design, Redis
2. Experience with SQL Server 2012 & above
3. Should be well versed with RabbitMQ
4. Knowledge on Azure Active Directory, Application Insights, Azure Devops/Git/Bitbucket Pipeline, Serverless / Azure functions, Azure Service Fabric / Functions
5. Hands-on JWT Tokens, API Authorization, OAuth 2.0 JSON or XML
6. Exposure to NetSuite, Workato will be an added advantage

Relevant Experience

3 to 10 years

Job Description and Key Skills Required:

• Hands-on with any of the programming languages like NodeJS/ExpressJS, Python, Java, Php or any.
• Design and create efficient RESTful API endpoints for both internal and public consumption
• Strong understanding of database technologies such as MySQL, Postgress, Oracle , relational Database.
• Work closely with front end developers to understand required data model
• Comfortable deploying applications on AWS, and have a strong working knowledge of EC2, RDS and S3.
• Must understand overall system design, architecture , improve design and implement new processes.
• Strong understanding of sessions, cookies & local storage is must.
• Experience with in memory databases like redis basic, Memcache
• Independently think of solutions to complex requirements; possess exceptional logical skills.
• Analyse current products in development, including performance, scalability, diagnosis and troubleshooting.
• Work with the existing framework and evolve it by building reusable code & libraries
• Search and introduce new software related technologies, processes and tools.
• Bonus: You're fluent with React.
• Bonus: Interested in full-stack development.
• Bonus: Any experience of iOS/Android mobile development.
• Bonus: Experience with CI servers such as Jenkins, Travis or similar types
• Bonus: Experience with web server like Nginx

Strong proficiency with one of the Vue.js, Angular JS, React JS JavaScript Techologies
2. Knowledge of Node.js and frameworks available for it , such as Express JS, Strong Loop, etc
3. Understanding the nature of asynchronous programming and Promises and its quirks and workarounds
4. Good understanding of server-side templating languages (such as Jade, EJS, etc depending on your technology stack)
5. Good understanding of server-side CSS pre-processors such as Styles, Less
6. Basic understanding of front-end technologies, such as HTML5, CSS3, and Bootstrap
7. Understanding accessibility and security compliance
8. User authentication and authorization between multiple systems(Internal or Third party), servers, and environments
9. Integration of multiple data sources and databases into one system
10. Understanding fundamental design principles behind a scalable application
11. Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform
12. Implementing automated testing platforms and unit tests
13. Proficient in code versioning tools, such as Git or TFS

• 4+ years of experience with Node.js
• Expertise in Typescript, AWS, Firebase, MongoDB, and Express

You will be bringing:

• Hands-on experience in writing applications using Node.js (including Socket.io and Express or similar)
• Excellent knowledge of a few of the available databases such as MySQL, MongoDB, etc.
• Proficiency in application deployment on Linux or Ubuntu environments
• Proficiency in JavaScript languages like React and/or Angular, along with a comprehensive experience in open-source frameworks
• Experience in server-client architecture project(s)
• Ability to prioritize in a chaotic and ambiguous environment
• An open, growth mindset when giving and receiving feedback