Java React Developer

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.

Full‑Stack Engineer (Python/Django & Next.js)

Location: Bangalore

Experience: 2–8 years of hands‑on full‑stack development

We’re looking for a passionate Full‑Stack Engineer to join our team and help build secure, scalable systems that power exceptional customer experiences.

Key Skills -

• Architect and develop secure, scalable applications

• Collaborate closely with product & design teams

• Manage CI/CD pipelines and deployments

• Mentor engineers and enforce coding best practices

What we’re looking for:

• Strong expertise in Python/Django & Next.js/React

• Hands‑on with PostgreSQL, Docker, AWS/GCP

• Experience leading engineering teams

• Excellent problem‑solving & communication skills

If you’re excited about building impactful products and driving engineering excellence. Apply now !!

Job Title - MERN Stack Developer

Experience Range – 3 to 6 Years

Location- Mumbai (Andheri East)

Mode- 5 Days working from office

Some specific Requirements:

• You have prior experience developing and working on consumer-facing web/app products
• Hands-on experience in JavaScript. Exceptions can be made if you’re really good at any other language with experience in building web/app-based tech products
• Expertise in Node.JS and Experience in at least one of the following frameworks - Express.js, Koa.js, Socket.io .
• Good knowledge of async programming using Callbacks, Promises, and Async/Await
• Hands-on experience with Frontend codebases using HTML, CSS, and AJAX
• Working knowledge of MongoDB, Redis, MySQL
• Good understanding of Data Structures, Algorithms, and Operating Systems
• You've worked with AWS services in the past and have experience with EC2, ELB, AutoScaling, CloudFront, S3
• Experience with Frontend Stack would be added advantage (HTML, CSS)
• You might not have experience with all the tools that we use but you can learn those given the guidance and resources
• Experience in Vue.js would be plus

Must Have Experience:

 Min 5 years of strong experience in Java/J2EE technologies

 Core Java, Spring / Spring Boot / React / Hybrid / Mobile

 Hibernate / JPA / JDBC

 Experience with web application environments like Eclipse, Tomcat and

WebLogic/WebSphere.

 Experience with tools like Git / SVN, Maven etc.

 Must have knowledge of Oracle Database / MS SQL Database.

 Should be able to do efforts estimation

 Should have done customer interaction

 Must have handled the team of 7-8 developers & testers

 Prepare / Review the document

•  Code Review

Hello All,

Greetings from RWaltz Software!!!!

👉 We're thrilled to announce that RWaltz Software Pvt. Ltd. is actively looking for a ‘Software Developer- (MERN Stack)’ position. Software Developers, who are passionate about the world of blockchain & cryptocurrency? Join our team and make a difference.

RWaltz Software Group Inc. is a multinational company (MNC) headquartered in Atlanta, Georgia, USA. We provide services like Blockchain, Big Data Analytics, Artificial Intelligence, Machine Learning, ERP solutions, and Web and Mobile applications. 

Job Details:

·        Position: Software Developer (MERN Stack)

·        Qualification: B. Tech, BCA, or any relevant courses

·        Exp Required: 1 – 3 years

·        Job Location: Nasik and Pune, Maharashtra

·        Work Days: 5 days working

Required skills:

·        Good Communication Skills.

·        Excellent technical, diagnostic, and troubleshooting skills.

·        Hands-on experience in MERN stack (MongoDB, Express JS, React JS, Node JS)

·        Experience in server management would be an added advantage.

·        Strong analytical and problem-solving skills.

·        Immediate joiners are appreciated.

Job Description:

·        Candidates must have good experience in the MERN stack (MongoDB, Express JS, React JS, Node JS).

·        Good knowledge of version control like GIT.

·        Analyze & resolve technical & application problems.

·        Liaising with team members, management, and clients to ensure projects are completed to standard.

·        Identifying risks and forming contingency plans as soon as possible.

·        This position is a hands-on role where we expect you to get directly involved with technology, platform, development and deployment methodology choices, high-level software and data flow decisions as well as helping the team with implementation and troubleshooting.

You'll be involved in the entire product lifecycle including the design, development, deployment, and maintenance of new and existing features. You'll also produce detailed specifications. Your code will be written in a timely and scalable way all while ensuring strong optimization.

• Develop in CRM as per the client and customer requirement
• Develop API integration with banks and NBFc to to transfer specific data.
• Well, understanding of Apache/Nginx servers.
• Well-knowledgeable of GIT.
• Experience working on PostgreSQL databases.
• Experience working in an Agile environment.
• Excellent developer who can interact effectively with businesses to understand product requirements and translate them into scalable and flexible Solutions.
• Work well within a team, take initiative and have clear communication. Ability to communicate challenges and solutions clearly within a team of people.
• Worked with AWS, or other major cloud vendors.
• Some exposure in working with databases, preferably postgres, sql.

https://www.getzuma.com/">https://www.getzuma.com/

Location – Bengaluru

GETZUMA

Senior Backend Engineer

Zuma makes an automated sales agent that converses with 100% of inbound leads, ultimately improving the way consumers interact with businesses and organizations. We’ve built this from the ground up using AI, ML, and human support which helps increase sales conversion and support capacity for businesses of all kinds. Zuma is one of the fastest-growing startups in San Francisco, and is well-funded and backed by world-class investors such as Y-Combinator, Joe Montana’s fund (Liquid 2 Ventures), Day One Ventures, Soma Capital, and other notable angel investors including Austen Allred (from Lambda School), YC’s ex-COO Qasar Younis, among others.

Headquartered in San Francisco, USA, we operate nationally and have plans to grow rapidly over the next few years. To do that, we need great people committed to our vision in a big way. We're looking to build a team of rockstars that are equally excited about the opportunity to leverage technology to improve the way customers interact with businesses!

We're looking for a senior backend engineer with experience building highly scalable systems to join our growing engineering team at Zuma. In this role, you will work closely with members of the engineering and product teams to deliver against our ambitious product roadmap as well as have a direct impact on the products and features you'll be building. We're a small but nimble team and are looking for candidates who thrive in an autonomous environment, with experience shipping products quickly and iteratively.

Job  Description

Skills

• o 5+ years of professional software development experience
• o 4+ years working with Node.js ecosystem
• o 4+ years experience building with AWS tech stack (RDS, EC2, Lambda)
• o Experience in developing complex web applications
• o Proficient in Javascript ES6 and above
• o Should be hands-on knowledge in working on VCS like Git
• o Should have sound knowledge in algorithms and problem-solving techniques
• o Should have knowledge about web application development and related technologies
•  

Role and responsibility

• o Organize full lifecycle software development
• o Lead the backend engineering team and make critical platform architecture decisions
• o Write well designed, testable, efficient code
• o Work alongside and effectively coordinate with other engineers on the team
• o Come up with procedures and frameworks to avoid technical debt
• o Create efficient architectural and database design
• o Evaluate and deploy software tools, processes and metrics
• o Help other engineers excel in their job and in their careers
• o Create amazing products that scale
•  
•  

Good to Have

• o Experience utilizing telecommunication services such as Twilio
• o Experience working with Keras/Tensorflow
•  
•  

• 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