Full Stack Developer

Job Title : Full Stack Engineer

Location : New Delhi

Job Type : Full-Time

About the Role :

We are seeking a passionate Full Stack Engineer who enjoys building scalable, high-performance applications across web and mobile platforms.

This role is ideal for someone eager to work in a fast-paced startup environment, contributing across the full development lifecycle.

Mandatory Skills :

React.js, Next.js, React Native, Node.js, Express.js, PostgreSQL, AWS (EC2/S3/RDS/IAM), RESTful APIs.

Key Responsibilities :

• Design, build, and maintain scalable applications for web and mobile.
• Translate UI/UX wireframes into efficient, reusable, and maintainable code.
• Optimize applications for maximum performance, scalability, and reliability.
• Work on both front-end and back-end development using modern frameworks.
• Participate in code reviews, debugging, testing, and deployment.
• Collaborate with cross-functional teams to deliver high-quality products.

Requirements :

• Experience : 1+ years of software development (internships + full-time combined acceptable).
• Frontend Skills : React.js, Next.js, React Native.
• Backend Skills : Node.js, Express.js, RESTful APIs.
• Database : Strong knowledge of PostgreSQL.
• Cloud : Exposure to AWS services (EC2, Elastic Beanstalk, RDS, S3, ElasticCache, IAM).
• Additional : Experience with Redis and BullMQ is a strong plus.
• Strong debugging, problem-solving, and analytical skills.
• Enthusiasm for working in a dynamic startup environment.

StarApps Studio is a product-driven SaaS company building Shopify apps that power thousands of online stores. We’ve developed 6 highly-rated Shopify apps (averaging 4.9★) used by 30,000+ Shopify merchants worldwide, including over 1,000 Shopify Plus stores. In just a few years, our bootstrapped team grew from $5.5M to $10M in Annual Recurring Revenue (ARR) by obsessing over quality and merchant success. We’re a tight-knit, 20-person team based in Baner, Pune, on a mission to help e-commerce brands create world-class shopping experiences.

Role Overview

We are looking for a Full Stack Developer who will own features end-to-end with an emphasis on backend excellence. In this role, you will design and optimize complex data models and API architectures in Ruby on Rails, implement robust background job queues (e.g. delayed_job) for heavy workloads, and perform rigorous performance tuning to ensure our systems scale. On the frontend, you'll build and integrate React components to deliver complete, user-friendly features. This is a role for someone who loves tackling deep technical challenges in the backend while also crafting intuitive user interfaces – an opportunity to leverage your backend expertise while driving full-stack product ownership.

Key Responsibilities

• Architect & Optimize Backend: Design scalable database schemas and efficient data models. Develop high-performance RESTful APIs and services in Ruby on Rails, ensuring clean, maintainable code and great performance.
• Backend API Development: Design, implement, and maintain robust backend services and RESTful APIs in Ruby on Rails to support new features and internal tools.
• End-to-End Performance Tuning: Optimize application performance across the stack – from minimizing frontend load times to improving backend query efficiency – for our high-traffic, data-intensive apps.
• Collaboration & Agile Delivery: Work closely with designers, product managers, and QA to translate requirements into technical solutions. Participate in sprint planning, code reviews, and daily deployments to ship features continuously and reliably.
• Quality & Maintenance: Write clean, maintainable code with appropriate test coverage (unit and integration tests) to ensure reliability. Monitor, debug, and resolve issues in production, and continually refactor and improve existing code for stability and performance

What We’re Looking For (Requirements)

• 4–8 Years Experience: Proven experience as a software developer in a product company (experience in e-commerce or SaaS is highly preferred). You have built real products used by actual customers at scale.
• Ruby on Rails Expertise: Strong command of Ruby on Rails. Experience designing RESTful APIs, working with MVC architecture, and using Rails best practices. You should understand how to structure large Rails applications for maintainability.
• Backend Proficiency: Comfortable building server-side applications and APIs with Ruby on Rails. You can implement business logic, integrate with databases, and create RESTful endpoints (bonus if you’ve worked with GraphQL or other backend frameworks).
• Database Skills: Proficiency with PostgreSQL (or similar RDBMS). Capable of writing complex SQL queries, optimizing queries/indexes, and designing efficient relational schemas. Familiarity with Redis or caching strategies is a plus.
• Front-End Proficiency: Comfortable building user interfaces with React and modern JavaScript/TypeScript. Able to implement frontend components that consume APIs and provide a smooth user experience.
• System Design & Quality: Solid understanding of web application architecture, performance tuning, and scalability concerns. Experience with profiling, benchmarking, and optimizing web applications. Commitment to writing clean, maintainable code with proper tests.
• Product Mindset: You care about the why behind the features. You are comfortable digging into requirements, questioning assumptions, and ensuring that we build solutions that truly solve merchant problems.
• Adaptability & Collaboration: Excellent problem-solving skills, communication, and ability to work in a fast-paced, collaborative environment. You are a self-starter who can take ownership of tasks and drive them to completion, but also know when to ask for help.

Tech Stack

• Frontend: React, TypeScript/JavaScript, HTML5, CSS3 (Tailwind/Bootstrap), modern build tools (Webpack, Babel).
• Backend: Ruby on Rails (REST APIs, background jobs), some services in Python.
• Database: PostgreSQL.
• Cloud & DevOps: Amazon Web Services (EC2, S3, RDS, CloudFront), Docker, CI/CD for daily deployments.
• Tools: Git (GitHub), Agile issue tracking (JIRA/Trello), and a keen use of automated testing.

(Don’t worry if you aren’t familiar with every item – we value willingness to learn. This is our current stack, and we continually adopt new technologies that improve our products.)

Why Join Us

• High Impact & Ownership: Your work will directly enhance the shopping experience of 50M+ shoppers daily. At StarApps, developers deploy code daily and see the immediate impact on thousands of merchants – you’ll own projects end-to-end and build features that matter.
• Fast-Growing, Profitable Startup: Join a bootstrapped, profitable company on an exciting growth trajectory (from $4M to $10M ARR). There’s no bureaucracy here – just a passionate team obsessed with product quality and merchant happiness. You’ll be part of our core team as we scale, with ample opportunities to grow into leadership roles.
• Cutting-Edge Tech & Challenges: Work with modern technologies (React, Rails, AWS) on performance-intensive applications. Tackle complex challenges in scaling, optimization, and UX for a global user base – continuously sharpen your skills in a supportive, learning-focused environment.
• Collaborative Culture: We are a small 25-person team that operates like a close-knit family. You’ll work side by side with experienced founders and a talented team that values innovation, humility, and continuous improvement. Our culture is open, empathetic, and growth-oriented – every voice is heard, and every team member plays a crucial role in our success.

Growth & Benefits: We invest in our team’s growth. Expect a competitive salary, performance bonuses, and whatever tools you need to do your best work. We sponsor professional development (courses, conferences, books) and encourage knowledge-sharing. You’ll enjoy a flexible leave policy, team off-sites, and the excitement of building a global product from our new office in Baner, Pune.

We are looking for a highly skilled Full Stack Developer (MERN Stack) with 3–5 years of experience to join our growing team. You will have the opportunity to work on cutting-edge technology solutions, build products from scratch, and contribute to scalable systems handling large volumes of data.

Key Responsibilities:

• Design, develop, and maintain scalable full-stack applications
• Build responsive and high-performance user interfaces using modern frontend frameworks
• Develop robust backend services and APIs
• Ensure seamless system performance while handling large-scale data without slowdowns
• Collaborate with cross-functional teams (product, design, QA) to meet business goals
• Optimize applications for maximum speed, scalability, and reliability
• Participate in architecture discussions and contribute to technical decisions

Required Skills & Qualifications:

Frontend

• Strong experience in React.js
• Hands-on experience with Next.js (mandatory)
• Good understanding of UI/UX principles and responsive design

Backend

• Solid experience in Node.js
• Experience with Python or Java is a plus
• Strong knowledge of RESTful APIs and microservices architecture

Databases

• Strong experience with SQL (mandatory)
• Experience with MongoDB is a plus
• Caching & Messaging
• Experience with at least one: Redis, Kafka, or Cassandra

Other Requirements

• Strong problem-solving and analytical skills
• Ability to work in a fast-paced, collaborative environment
• Good communication and stakeholder management skills

Good to Have:

• Cloud certifications (AWS / Azure / GCP)
• Experience working on high-scale or distributed systems
• Exposure to DevOps practices and CI/CD pipelines

Why Join Us:

• Opportunity to work on cutting-edge tech and greenfield projects
• Ownership and freedom to build solutions from scratch
• Collaborative and growth-focused work environment

Role Overview

We are looking for an Engineering Manager who thrives in a fast-paced startup environment, is hands-on with development, and can lead our engineering team to build and scale robust, high-performing systems. You will drive architectural decisions, mentor a team of talented engineers, and collaborate closely with product, design, and business teams to execute our ambitious roadmap. You will be at the forefront of scaling our infrastructure to support billions of messages, ensuring real-time engagement for businesses at scale.

Key Responsibilities

• Technical Leadership: Own the engineering roadmap, ensuring scalability, reliability, and performance of our systems.
• Hands-on Development: Dive into the code when necessary, set high coding standards, and lead by example.
• Team Management: Lead, mentor, and scale a high-performing engineering team, fostering a strong culture of ownership and innovation.
• System Scalability: Architect and optimize scalable and resilient backend & frontend systems handling millions of messages per day.
• High Availability & Performance: Design systems that can handle billions of API calls and ensure minimal downtime.
• Agile Execution: Drive sprint planning, prioritization, and timely delivery of features in an agile development environment.
• Collaboration: Work closely with product, design, and business teams to align engineering efforts with company goals.
• DevOps & Security: Ensure best practices for CI/CD, cloud infrastructure (AWS/GCP), and security compliance.
• Tech Stack Evolution: Stay ahead of emerging technologies and drive innovation in AiSensy’s architecture.

What You Bring

• 8+ years of experience in software development, with at least 2 years in a leadership/managerial role.
• Expertise in modern tech stacks – Proficiency in MERN (MongoDB, Express, React, Node.js) stack or similar.
• Strong knowledge of cloud platforms (AWS) and microservices architecture.
• Proven experience in scaling high-traffic, distributed systems handling billions of messages per month.
• Hands-on experience with Docker, Kubernetes, and CI/CD pipelines.
• Strong problem-solving skills and an ability to hustle in a fast-paced startup environment.
• Excellent communication skills and a data-driven decision-making approach.
• Passion for building great products, coaching engineers, and driving tech excellence.

What We Offer

• Competitive Compensation & Benefits aligned with your experience and the impact you bring.
• Opportunity for Growth in a rapidly expanding B2B SaaS company.
• Cutting-Edge Technology & Projects in the WhatsApp Business API and Click to WhatsApp Ads space.
• Collaborative Work Environment that fosters innovation, learning, and career development.
• Flexible & Inclusive Culture, where every team member has a voice and the chance to make a significant impact.

Responsibilities:

• Your primary focus will be developing interactive Vue js applications.
• You will ensure that you produce robust, secure, modular, and maintainable code.
• You will coordinate with other team members, including backend developers and UX/UI designers.
• Developing web applications using Vue.js
• Building modular and reusable components and libraries
• Optimising your application for performance

Requirements:

Frontend:

• Proficient with the JavaScript language and its modern ES6+ syntax and features
• Proficient with Vue.js/React framework and its core principles such as components, reactivity, and the virtual DOM
• Familiarity with the Vue.js or React ecosystem, including Vue CLI, Vuex, Vue Router, and Nuxt.js
• Good understanding of HTML5 and CSS3, including Sass
• Understanding of server-side rendering and its benefits and use cases
• Ability to write efficient, secure, well-documented, and clean JavaScript code
• Experience with both consuming and designing RESTful APIs

Backend:

• Experience as a Python Developer for 2+ years
• Expertise in Python framework Django/Flask, creating & use REST API, object-relational mapping (ORM)
• Experience in AWS, GIT, CI/CD Pipelines, and unit testing

What is Pocketbits?
India's Oldest Active Cryptocurrency Exchange. Born in 2016, PocketBits takes pride in being India's oldest operating Crypto Exchange. Our strategy focuses on providing unprecedented support and innovative products for all our global user base. We are solely a product-based company wherein we build and develop our own line of products and currently operate primarily in the Cryptocurrency and Blockchain space.

Visit us at: https://pocketbits.in/.">https://pocketbits.in/

What is in it for you?

Working in a hyper-growth community of young, adventurous, and enthusiastic minds who passionately own and love what they do will be an excellent spot. You'll have absolute freedom to pursue your objectives without constraints, and you'll get a front-row seat to the cryptocurrency revolution while we make history.

Domain: Fintech ( Cryptocurrency)

Experience: 1-3 years 

What do we expect:

• Experience with the MERN stack (MongoDB, Docker, Express.JS, React.JS, and Node.JS)
• Excellent JavaScript skills and strong proficiency in React
• Experience building backend APIs using NodeJs and ExpressJs
• Experience with NoSQL databases such as MongoDB, mongoose, aggregation framework, and Redis
• Experience with Web sockets, KAFKA, and related frameworks
• Experience with Blockchain-related developments is a plus.
• Understanding accessibility and security compliance.

What will you do :

The duties and responsibilities of a selected applicant would include:

• Designing and building scalable applications from end to end.
• Seeing through a project from conception to finished product.
• Creating servers and databases for functionality.
• Ensuring cross-platform optimization for mobile phones.
• Ensuring responsiveness of applications.
• Designing and developing APIs.
• Testing and fixing bugs or other coding issues.
  
  
  

• 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