Fullstack Engineer - Y Combinator Travel / Airline SaaS

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.

• Experience in building reusable, and modular UI components and ensure cross browser compatibility.
• 3+ years developing, deploying, and supporting web applications built on framework. like Django/ NodeJS/ ReactJS.
• Must have 3+ years of current experience in Python or Go
• Knowledge in writing automated tests
• Proficient in High Level Systems Integration Design
• Understanding of Accessibility and internationalization
• Proficient in source control using GitHub
• Experience with building and maintaining a SaaS product at scale
• Write code that is tested and testable and you take responsibility for the quality of the code you produce. You will be helping build the best user experience for our Anaplan platform.
• Work in a hybrid cloud infrastructure, considering the implementation of functionality through several distributed components and services.
• Express your positive energy and enthusiasm - cultural fit is a really big deal for us. we're looking for really committed people who love solving big problems and are self-motivated to get things done.
• Familiar with developing SaaS applications using Django, NodeJS, ReactJS for development, be an added plus.

Your Responsibilities:

• Responsible for overall tech stack of the product
• Designing overall architecture of the web/ mobile application
• Maintain quality and ensure responsiveness of applications
• Exposure to security and data protection management
• Building modular, reusable codes and libraries
• Ability to build product from scratch & drive it to completion
• Optimize applications for best user experience
• Development experience for both mobile and web based products.
• Unit Testing of developed modules

Skills:

Front-End

• Web fundamentals like HTML, JavaScript, and CSS
• CSS preprocessors like Sass, LESS, bootstrap
• JavaScript frameworks like React js, AngularJS, or Ember etc.
• Libraries like jQuery or Backbone.js
• Front-end (CSS) frameworks like Foundation or Bootstrap
• Web sockets

Back-End

• Rest API design and development
• CRUD (Create, Read, Update, Delete)
• RESTful Services
• Web fundamentals like React js, HTML, JavaScript, and CSS
• Server-side languages like Javascript, PHP, Python
• Database technologies like MySQL and MongoDB.
• Web server technologies like Node.js, Nginx, ISS, etc.

Role

We are looking for a  Senior Software Engineer - Python, React to join our engineering team and help us develop and maintain various software products.

You should be comfortable around front-end and back-end coding languages, development frameworks, and third-party libraries. You should also be a team player with a knack for visual design and utility.

Ultimately, you’ll build highly responsive web applications that align with our business needs.

Responsibilities

• Write effective, scalable code
• Develop front-end and back-end components to improve responsiveness and overall performance
• Integrate user-facing elements into applications
• Test and debug programs
• Improve functionality of existing systems
• Implement security and data protection solutions
• Assess and prioritize feature requests
• Coordinate with internal teams to understand user requirements and provide technical solutions

Qualifications

• BSc/BE/BTech in Computer Science, Engineering or a related field
• Must have 4+ years of work experience as a Python/Django (Back-end) and React (Front-end) developer
• Expertise in Django Framework. Other frameworks like Flask Pyramid knowledge are good to have
• Strong experience with Linux-based infrastructures, Linux/Unix administration, and AWS.
• Proficient in Terraform which allows migration to Kubernetes 
• Experience with DevOps toolchains such as Docker, Travis CI, Jenkins, Git.,
• Understanding of fundamental design principles behind a scalable application
• Able to create database schemas that represent and support business processes
• Knowledge of object-relational mapping (ORM)
• Able to implement automated testing platforms and unit tests
• Proficient understanding of code versioning tools (Git) 
• React experience is good to have
• Team spirit
• Good problem-solving skills

Our growing software technology business is looking for a Mid Level Full Stack Developer to join our Development Team. We're looking for a talented, team-oriented, highly motivated, smart individual with a passion for software engineering, a strong desire to learn and an interest in providing mentorship to peers. We desire self-starting developers with strong experience developing sophisticated web applications leveraging the latest technologies. The successful candidate for this role must be an outstanding problem-solver with great database and software architectural skills.

KEY REQUIRED SKILLS

• Node.js
• GIT
• MySQL

POSITION DESCRIPTION

We have an immediate need for a highly motivated Mid Level Node Software Developer to provide software development expertise and hands on implementation using the latest open source server-side JavaScript technologies on the Node platform and other related open source products.

REQUIRED

• Strong software development experience with Node.js in addition to detailed understanding of user interface frameworks, back-end software architecture interactions and node module capabilities.
• One or more years' experience with one or more JavaScript frameworks/technologies such as Express.js, Angular.js, React.js, MobX or Flux.js.
• Strong development experience using Node.js.
• Strong communication and collaborative skills
• Portfolio of application(s)

DESIRED SKILLS

• Experience with HTML5, CSS3.
• Experience with source code versioning and Pull Requests with Git repositories.
• Standards & Protocols knowledge including JSON.
• Complex programming, program debugging, automated program testing, data analysis, problem analysis and resolution of issues within open source applications.
• Experience in other languages such as .net, including VB and C# are a plus
• Operating System and Infrastructure experience with Ubuntu Linux and Windows Server.

EDUCATION

• Bachelor’s degree from an accredited college in a related discipline, with minimum 2-3 years of relevant professional experience.
• Exact skill match may allow flexibility with education and experience requirements
  • Certifications are a plus.

• Mandatory Skills : Java, Springboot, Microservices.
• Basic knowlege of HTML and CSS
• good understanding of REST API designing as well as development using spring.
• Strong Hands on experience in Angular or React JS
• Effective in using frameworks.
• Proficient understanding of code versioning tools Git/bit bucket with Maven.
• hands on expereince in SQL