Senior Full - Stack Engineer

QNu Labs; Bengaluru; On-site; INR 1,500,000 - 2,300,000; Full time

Job summary

QNu Labs in Bengaluru, India seeks a senior full-stack engineer to develop secure, scalable applications across backend, frontend, and database layers. You will design microservices, implement RESTful/GraphQL APIs, and craft robust React components with modern tooling.

Ideal candidates have 6–8 years of experience, strong Node.js or Go skills, expertise in databases, containerization with Docker/Kubernetes, and CI/CD pipelines, with a focus on code quality and performance.

Qualifications

• 6 to 8 years of professional experience in full-stack software development.
• Experience with Node.js (Express/NestJS) or Go.
• Strong asynchronous programming, multithreading, or Go concurrency patterns.
• Strong grasp of OOP and functional programming.
• Frontend expertise in React.js, hooks, and architecture.
• Proficiency in JavaScript/TypeScript (ES6+), HTML5, and CSS3.
• Strong database design skills with PostgreSQL, MySQL, MongoDB, or Redis.
• Experience with Docker, Kubernetes, and CI/CD pipelines.
• Commitment to writing clean, well-tested code with good test coverage.
• Problem-solving and ability to translate vague requirements into technical solutions.

Responsibilities

• Core Application Development: Write clean, highly performant, well-tested, and secure code across the entire stack.
• Backend Architecture: Design and maintain scalable microservices and RESTful/GraphQL APIs using Node.js (TypeScript) or Go.
• Frontend Engineering: Build reusable components, state-management architectures, and dynamic UIs using React.js.
• Database Management: Structure, optimize, and interface with databases (SQL or NoSQL) per project.
• Technical Leadership: Lead design sessions, review code, and establish coding best practices.
• Performance Tuning: Troubleshoot performance bottlenecks, memory leaks, and concurrency issues in frontend and backend.

Skills

Full-stack

Asynchronous programming

OOP

Functional programming

Data structures

Algorithms

Code quality

Leadership

Tools

Node.js

Go

React.js

TypeScript

Express

NestJS

Redux

Context API

RESTful APIs

GraphQL

PostgreSQL

MySQL

MongoDB

Redis

Docker

Kubernetes

CI/CD

ES6+

HTML5

CSS3

Job description

Responsibilities:

• Core Application Development: Write clean, highly performant, well-tested, and secure code across the entire stack.
• Backend Architecture: Design and maintain scalable microservices and RESTful/GraphQL APIs using either Node.js (TypeScript) or Go.
• Frontend Engineering: Build reusable components, state-management architectures (Redux/Context API), and dynamic user interfaces using React.js .
• Database Management: Structure, optimize, and interface with various databases (SQL systems like PostgreSQL/MySQL or NoSQL environments like MongoDB/Redis) based on project needs.
• Technical Leadership: Lead complex system design sessions, conduct rigorous code reviews, and establish coding best practices across the team.
• Performance Tuning: Troubleshoot complex performance bottlenecks, memory leaks, and concurrency issues in both frontend apps and backend services.

Requirements:

• 6 to 8 years of professional experience in full-stack software development, ideally within fast-paced engineering environments.

Backend Expertise:

• Heavy hands-on experience with either Node.js (Express, NestJS) OR Go.
• Deep understanding of asynchronous programming paradigms, multithreading, or Go concurrency patterns (goroutines/channels).
• Solid grasp of OOP, functional programming, data structures, and algorithmic logic.

Frontend Expertise:

• Mastery of React.js, modern React workflows, hooks, lifecycle management, and architectural styles.
• Strong knowledge of modern JavaScript/TypeScript (ES6+), HTML5, and CSS3.

Database and Infrastructure:

• Strong database design skills with the ability to work with any major database (e. g., PostgreSQL, MySQL, MongoDB, or Redis).
• Experience with containerization technologies (Docker, Kubernetes) and CI/CD development pipelines.

Core Traits:

• Obsession with code quality: A strict adherence to writing clean, self-documenting code with excellent unit and integration test coverage.
• Problem Solver: Ability to take vague business requirements and self-direct structural technical implementations.