Mobile App Developer

Years of Experience – 3 to 6 years

Location – Chennai

Work Mode: Hybrid – 3 days mandatory Work From Office (WFO).

Job Type: Full-Time

Role Description:

• Develops software solutions by studying information needs; conferring with users; studying

systems flow, data usage, and work processes; investigating problem areas; following the

software development lifecycle.

• Determines operational feasibility by evaluating analysis, problem definition, requirements,

solution development, and proposed solutions.

• Documents and demonstrates solutions by developing documentation, flowcharts, layouts,

diagrams, charts, code comments and clear code.

• Prepares and installs solutions by determining and designing system specifications,

standards, and programming.

• Improves operations by conducting systems analysis, recommending changes in policies and

procedures.

• Updates job knowledge by studying state-of-the-art development tools, programming

techniques, and computing equipment; participating in educational opportunities; reading

professional publications; maintaining personal networks; participating in professional

organizations.

• Protects operations by keeping information confidential.

• Provides information by collecting, analyzing, and summarizing development and service

issues. Accomplishes engineering and organization mission by completing related results as

needed.

• Supports and develops software engineers by providing advice, coaching, and educational

opportunities.

Mandatory skills:

• Hands-on experience with web development in any of the following programming languages:

Python, JavaScript

• Hands-on experience in the following JavaScript framework: React

• Hands-on experience in any of the following framework: Python (Django, Flask) or NodeJS

(Express, NestJS)

• Experience with back-end development, basic microservices implementation and

containerization using Docker

• Expertise in Relational databases such as Postgres, MySQL, Oracle, etc.

• Expertise in NoSQL DB such as MongoDB, Amazon DynamoDB, Cassandra, etc.

• Good Knowledge with any of the cloud providers such as Amazon Web Services, Microsoft

Azure or Google Cloud.

• Excellent verbal and written communication skills.

We are looking for a MERN Stack Developer with 2+ years of real-world experience who thinks beyond CRUD APIs and UI screens. This role is for someone who understands how full-stack systems are designed, cares about scalability, performance, security, and clean architecture, and takes ownership of features end-to-end.

We value ownership, speed, clean code, and smart problem-solving. If you enjoy building products from scratch, thinking in systems, and shipping meaningful features—not just “finishing tasks”—this role is for you.

🧠 Key Responsibilities

• Design, develop, and maintain full-stack applications using MongoDB, Express, React, and Node.js
• Build scalable and maintainable backend APIs with proper validation, error handling, and security
• Develop clean, reusable, and performant React components
• Design database schemas and optimize queries for performance and scalability
• Translate product and business requirements into solid technical solutions
• Design frontend and backend architecture that can scale as the product grows
• Handle authentication, authorization, roles, and permissions
• Work with async operations, background jobs, and API integrations
• Manage application state properly (React state, context, or state libraries)
• Handle edge cases: loading, failure states, retries, and fallbacks
• Write clean, readable, and well-structured JavaScript / TypeScript code
• Follow and continuously improve coding standards and best practices
• Debug production issues using logs, reasoning, and root-cause analysis
• Review PRs, give constructive feedback, and contribute to team learning
• Work with designers to deliver good UX, not just “working UI”
• Collaborate closely with QA, design, and product teams
• Think ahead—identify technical debt, performance bottlenecks, and improvement areas
• Use AI tools responsibly to speed up development, debugging, and learning (with understanding)

✅ Qualifications Must Have

• 2+ years of hands-on experience with the MERN stack
• Strong knowledge of JavaScript and TypeScript, including OOP concepts
• Solid experience with Node.js & Express
• Hands-on experience with MongoDB, schema design, indexing, and aggregation
• Experience building and consuming REST APIs
• Strong understanding of async/await, promises, event loop
• Knowledge of HTML, CSS, responsive design (Tailwind / Bootstrap preferred)
• Experience with React hooks, component lifecycle, and state management
• Use React performance optimizations such as: React.memo useCallback, useMemo
• Implement code splitting and lazy loading using dynamic imports
• Work on or understand micro-frontend architecture and module federation
• Experience handling authentication (JWT, sessions, OAuth)
• Familiarity with Git, code reviews, and basic CI/CD concepts
• Exposure to real production issues (performance, bugs, scaling, failures, debugging)

Good to Have (Big Plus)

• Knowledge of Next.js or server-side rendering concepts
• Experience with Redis, queues (kafka, rabbitmq), or background jobs
• Experience with Docker, cloud deployments, or Nginx
• Understanding of performance tuning and lazy loading
• Experience working in a startup or fast-paced environment

❌ Who Should Not Apply

Please do not apply if:

• You only focus on “closing tickets” without questioning why something is being built
• You lack strong JavaScript fundamentals (arrays, objects, async/await, promises, event loop)
• You mostly copy-paste code without understanding it
• You never think about edge cases, failures, retries, or resilience
• You depend heavily on others for architecture or technical direction
• You avoid responsibility and say things like:
• “Frontend issue”
• “Backend issue”
• “It was already like this”
• “QA didn’t catch it”
• You are not comfortable explaining your code, decisions, or design choices
• You expect exact step-by-step instructions for every task
• You are not interested in learning and improving as a full-stack engineer

👉 This role is not for task executors.

We want problem solvers, thinkers and owners.

About BXI

BXI is India’s leading barter marketplace, enabling brands and businesses to trade products and services through a powerful digital platform. We are expanding our tech team and looking for a talented Full Stack Developer who can build, scale and optimise our JavaScript-based product ecosystem.

Key Responsibilities

• Develop, maintain, and enhance web applications using React.js (frontend) and Node.js (backend).
• Architect and implement scalable APIs and microservices.
• Deploy, manage, and monitor applications on AWS cloud infrastructure.
• Collaborate with Product, Design, and Business teams to understand requirements and translate them into technical solutions.
• Optimise application performance, enhance UI/UX, and improve overall platform stability.
• Troubleshoot, debug, and resolve complex technical issues.
• Follow coding standards, maintain proper documentation, and participate in code reviews.
• Contribute ideas for continuous improvement in architecture and development processes.

Required Skills & Experience

• 2–4 years of experience as a Full Stack Developer.
• Strong proficiency in JavaScript, React.js, Node.js, and related frameworks.
• Hands-on experience with AWS services (EC2, Lambda, S3, RDS, CloudWatch, etc.).
• Experience in building and integrating RESTful APIs.
• Excellent understanding of database technologies (MySQL, MongoDB, or similar).
• Familiarity with version control tools like Git.
• Strong debugging, problem-solving, and analytical skills.
• Ability to work independently as well as in a collaborative team environment.

Job Overview:

We are looking for a Java React Developer to join our development team. The ideal candidate will have experience working with Java (Spring Boot) for backend development and React.js for frontend applications. You will be responsible for building scalable web applications, integrating RESTful APIs, and ensuring a seamless user experience.

Key Responsibilities:

• Develop and maintain web applications using Java (Spring Boot) for backend and React.js for frontend.
• Design and implement RESTful APIs for communication between frontend and backend.
• Optimize applications for speed, scalability, and security.
• Work with databases such as MySQL, PostgreSQL, or MongoDB.
• Write clean, maintainable, and efficient code following best practices.
• Collaborate with cross-functional teams, including designers, product managers, and other developers.
• Perform unit testing, integration testing, and debugging.
• Participate in Agile methodologies like Scrum and Sprint planning.
• Deploy applications using CI/CD pipelines and cloud platforms (AWS, Azure, or Google Cloud).

Required Skills:

• Java & Spring Boot (Core Java, REST APIs, Microservices, JPA, Hibernate).
• React.js (Hooks, Redux, Context API, Functional Components).
• Experience with HTML, CSS, JavaScript, and TypeScript.
• Strong knowledge of RESTful APIs and Web Services.
• Experience with databases like MySQL, PostgreSQL, MongoDB.
• Understanding of JWT/OAuth for authentication.
• Familiarity with CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD).
• Knowledge of Docker and Kubernetes is a plus.
• Experience with unit testing frameworks (JUnit, Jest, Mocha) is a plus.

• 2 to 4 years experience in MERN stack
• Good problem-solving technique
• Knowledge of AWS ecosystem is a plus
• Experience in FinTech is a big plus