Senior Full Stack Developer

Job Title: Senior Java Full Stack Developer

Locations: Delhi NCR, Hyderabad, Chennai, Pune, Bangalore Experience: 6–13 Years

Employment Type: Full-Time

"Need Immediate joiners or serving notice period candidates only can join in a maximum of 30 days"

About the Role

We are looking for an experienced and highly skilled Java Full Stack Developer with strong backend expertise in Java and hands-on experience in ReactJS for front-end development. The ideal candidate will drive the design, development, and implementation of high-performance, scalable applications that meet business goals.

Key Responsibilities

Backend Development (Approx. 80%)

• Design, develop, and maintain robust and scalable backend services using Java, Spring Boot, and related frameworks.
• Build and optimize RESTful APIs and microservices.
• Collaborate with cross-functional teams to define backend architecture and ensure high availability and performance.
• Troubleshoot complex issues, debug code, and improve overall system reliability.
• Participate in code reviews, design discussions, and technical decision-making.

Frontend Development (Approx. 20%)

• Develop responsive user interfaces and reusable ReactJS components.
• Integrate frontend components with backend services and APIs.
• Ensure high performance, cross-browser compatibility, and seamless user experience.

General

• Work in an Agile/Scrum environment and deliver high-quality software on schedule.
• Maintain robust documentation and follow SDLC best practices.
• Mentor junior developers and contribute to team growth.

Required Skills & Qualifications

• 6–13 years of professional experience in software development, with a strong focus on backend systems.
• Advanced proficiency in Java, Spring Boot, and related server-side technologies.
• Hands-on experience with ReactJS and modern JavaScript.
• Solid understanding of REST APIs, microservices architecture, and web services.
• Strong database skills (SQL and/or NoSQL) and familiarity with schema design.
• Experience with version control (e.g., Git) and CI/CD practices.
• Excellent problem-solving, debugging, and communication skills.

Preferred Skills (Bonus)

• Experience with containerization and orchestration (Docker, Kubernetes).
• Exposure to cloud platforms (AWS, Azure, GCP).
• Knowledge of message queuing (Kafka, RabbitMQ).
• Familiarity with automated testing frameworks and best practices.

Education

• Bachelor’s or Master’s degree in Computer Science, Engineering, IT, or a related field (or equivalent practical experience)

When life gives you lemons and you can code both front and back with equal zest, you’re probably a Full Stack Developer we’d love on our team.

At Lemon Yellow, we’re looking for someone who thrives on building end-to-end web solutions using the MERN stack. From crafting intuitive front-ends to developing efficient, scalable back-end systems, you’ll be involved in shaping digital products from the ground up. If turning design mockups into pixel-perfect, high-performance applications excites you, we’re ready to build with you.

1. Core Responsibilities

• Build and maintain end-to-end web applications using the MERN stack.
• Act as a bridge between design and development to bring ideas to life with clean, scalable code.
• Support digital campaigns through intuitive and functional tech implementations.
• Design, develop, and deploy scalable front-end and back-end components.
• Write clean, maintainable code while collaborating with designers, marketers, and other developers.
• Translate product requirements and UI/UX wireframes into fully functional digital solutions.

2. API & Integration Management

• Implement RESTful APIs and connect third-party tools and services.
• Ensure smooth data exchange across platforms through secure integrations.
• Manage user authentication and authorization using mechanisms like JWT or OAuth.

3. Code Quality & Optimization

• Debug, profile, and optimize applications for performance and reliability.
• Maintain unit and integration test coverage for code robustness.
• Conduct code reviews and help improve internal coding standards.

4. Agile Collaboration

• Actively participate in agile activities: daily stand-ups, sprint planning, retros, and demos.
• Contribute to task estimation and cross-functional problem-solving.
• Stay responsive to project shifts and quick delivery needs.

5. Continuous Learning & Innovation

• Stay up to date with the latest development trends, tools, and practices.
• Share learnings and explore creative solutions for technical challenges.
• Experiment with emerging technologies and suggest process improvements.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• Minimum 1 year of hands-on experience building production-ready web applications using MongoDB, Express.js, React.js, and Node.js.
• Strong command of JavaScript (ES6+), HTML5, and CSS3.
• Experience with Git and version control systems
• Familiarity with RESTful API design, JSON, and authentication mechanisms (JWT, OAuth)
• Familiarity with cloud platforms (AWS, Azure, or GCP) and containerization (Docker).
• Basic understanding of CI/CD pipelines and automated testing.
• Strong analytical and problem-solving mindset.
• Detail-oriented with a passion for clean, maintainable code.
• Collaborative attitude with good verbal and written communication skills.

What are we offering?

Experience

• A chance for you to work in a thriving and growing environment. We foster a culture where growth is harmonious and creativity is always appreciated - you grow and you encourage others to do the same.

Exposure

• If you believe in your work, we believe in you. If you think your designs have the power to change the world, we'll help you bring your vision to life and give you the platform to prove it.

Empathy

• We have a carefully curated culture that promotes 2 things: fun & fulfilment. Your welfare - personal, professional, mental, and physical - becomes our responsibility. From Fitness Thursdays to learning sessions, we try to make you laugh & learn.

Who are we?

Lemon Yellow LLP is a user-centered UI/UX design agency, based out of Thane, Maharashtra. With international operations, an experienced mentorship, and a passionate team, we aim to design digital happiness.

How do you reach us?

Well, after you send in your application, it takes us 2-3 weeks to review it. Sometimes, not often, we might delay just a bit beyond that. This happens when our mailbox is flooded with applications.

We promise we won’t ghost you, you’ll definitely hear from us. In the meantime, feel free to explore our official website.

• Develops software solutions by studying information needs, conferring with users, studying systems flow, data usage, and work processes; investigating problem areas; and 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 and recommending changes in policies and procedures.
• Updates job knowledge by studying state-of-the-art development tools, programming techniques, and computing equipment, and by participating in educational opportunities, reading professional publications, maintaining personal networks, and 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.

Job Title : Senior MERN Stack Developer with Blockchain Expertise

Location : Indore, MP

Experience : 2-5 years

Job Type : Full-time, On-site

We're seeking a seasoned Senior MERN Stack Developer with a strong focus on blockchain technology to join our innovative team in Indore. As a Senior MERN Stack Developer, you'll play a pivotal role in crafting and implementing cutting-edge blockchain solutions using the MERN stack. Your expertise will contribute to the development of secure, scalable, and decentralized applications. If you're passionate about blockchain technology, possess extensive MERN stack experience, and thrive in a collaborative environment, we encourage you to apply and be a key player in our transformative projects.

Requirements :

- Proven experience as a Full Stack Developer with a specialization in blockchain technology.

- Proficiency in the MERN stack (MongoDB, Express.js, React, Node.js).

- Experience with major blockchain platforms such as Ethereum, Hyperledger, or similar.

- Solid understanding of smart contract development and implementation.

- Knowledge of decentralized application (dApp) development.

- Familiarity with cryptography and principles of blockchain security.

- Strong problem-solving and analytical skills.

- Excellent collaboration and communication skills.

Skills :

- MongoDB, Express, Node.js, React.js

- Next.js (knowledge preferred but not mandatory)

- WordPress/Shopify experience (preferred)

- Real-time communication using Socket.IO or WebRTC (preferred)

- GraphQL API development

- Experience with integrating payment gateways

If you're ready to take on exciting challenges and contribute to groundbreaking projects, apply now and join us in shaping the future of blockchain technology.

Description:

• Building highly scalable services end-to-end with frontend to handle terabytes of data.

• Finding innovative ideas to solve highly complex engineering problems or best UI/UX experience.

• Own, execute and deliver products/features end-to-end from planning to design to development to deployment

• Be the go-to person for the team for guidance and troubleshooting

• Proactively involved in code reviews, architecture, and design discussions

• Be the mentor to junior engineers or Interns for their deliverables to succeed

• Maintain engineering standards and best practices for coding, code reviews, releases

Required skills:

• 1 to 3 years of expertise in full stack software development with one or more of the general programming languages (e.g., Frontend- Angular, React, TypeScript, Backend- Python, java, C/C++, Go etc.). Experience in Angular with python is recommended.

• Deep understanding of how to build an application with easy integration of RESTful APIs along with good sense of UI designs.

• Knowledge of a how a frontend and backend framework like Angular or Django or similar with ORM or multi-tier, multi-DB-based data-heavy web application development will help your profile stand out.

• Proficiency in (S)CSS, HTML5, Javascript and writing cross-browser compatible code along with CSS framework like Bootstrap.

• Good understanding of RxJS observables and/or Promises, chart libraries like ChartJS or Highcharts.

• Good understanding of bundling modules (Webpack or gulp)

• knowledge of SQL queries & DB like PostgreSQL(must) or MySQL. Working knowledge of NoSQL DBs (Mongo, Redis, etc.) is a plus.

• Understands a programming language's limitation to exploit the language behavior to the fullest potential.

• Understanding of accessibility and security compliances

• Ability to communicate complex technical concepts to both technical and non- technical audiences with ease

• Diversity in skills like version control tools, CI/CD, cloud basics, good debugging skills, and test-driven development will help your profile stand out.

• Observe, strategize, develop and design required software solutions.
• Designing Client-Side and Server-Side Architecture and Rendering and Static Site Generation.
• To confer with users - by studying systems flow, data usage & work related bottlenecks.
• Design and implement Back End and Front End code
• Interact with the production team, understand their workflow and find new ways to automate their workflow.
• Write effective APIs as well as Integrate third-party APIs.
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
• Work with data scientists and analysts to improve software
• Manage huge data sets including structured and unstructured data sources.
• Machine learning tools for workflow automation.
• Knowledge of Spark and Map Reduce.

• Strong Knowledge of and C#, .NET
• Strong knowledge of client-side dynamic and rich UI applications development.
• Hands-on experience on HTML, CSS, bootstrap, JavaScript, AJAX, jQuery and Prototyping.
• Strong hands-on experience in popular frameworks and JavaScript ecosystem – JS, Node, Angular, Jquery.
• Experience in Spark, Hadoop, Scala, and Elastic Search is a plus point.
• Experienced in building applications that meet enterprise needs – secure, scalable, loosely coupled design
• Exceptional design, coding, and problem-solving skills, with a bias for architecting at scale.
• Experience using NPM, Web-Pack, Gulp.
• Familiarity with performance testing and optimization’s.
• Strong knowledge of computer science, algorithms, and design patterns
• Write robust modular code for the full stack using the latest technologies, test and optimize it to work for high performance and scale and deploy it to the UiPath cloud platform.
• Work with various horizontal teams such as Structure, Electrical, Mechanical, Accessibility, Legal, and Finance and also interact with other core teams across locations at UiPath
• Own the smooth running of your cloud service or docker service, and respond to live site issues.
• Strong oral and written communication, and other soft skills critical to collaborating and engage with teams

About Company:

About Job:
As a MEAN stack developer, you should be comfortable around both 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.

We want a team member who strives to develop a first-class codebase using Angular best practices.

• 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

• BSc/BE/BTech/ME/MTech/MCA/MCS in Computer Science, Engineering or a related field
• Must have work experience on MongoDB, Expressjs, AngularJs, NodeJS.
• Must have work experience as a React or Angular (Front-end) and Node JS (Back-end) developer. Good to have a working knowledge of NestJS,
• Strong expertise with HTML, CSS, and writing cross-browser compatible code.
• Good understanding of AJAX and JavaScript DOM manipulation Techniques
• Experience with RESTful services
• Hands-on and implements complex Angular modules
• Able to implement automated testing platforms and unit tests
• Understanding of fundamental design principles behind a scalable application
• Proficient understanding of code versioning tools (Git)
• Critical thinker and problem-solving skills
• Team player
• Good time-management skills
• Great interpersonal and communication skills

Design

·       Design a Service Platform that will serve a large scale of users 

·       Prepare design based on requirements and direction provided by product manager

·       Research and consult with SMEs to ensure the design is most suitable to meet the requirements

·       Present and explain design decisions and gain consensus within in the team

·       Propose UI/UX design decisions that align with requirements and expectations

·       Create any support documentation required for future design updates and validation

Develop

·       Document development plan to implement requirements (Senior)

·       Manage development project tasks and schedule (Senior)

·       Establish development lifecycle model to suit the needs of the project (Senior)

·       Build & configure the base platform based on Open Source solution

·       Manage sprint cycle releases and track development progress 

Quality

·       Perform Quality Assurance before releasing new features

·       Conduct Integration testing to ensure platform is stable

·       Track any issues and ensure that defects are resolved in the next release

·       Demonstrate new features at the end of the sprint

·       Report the development progress weekly including any issues identified

Standards

·       Use the following standards, methods and techniques

o   SDLC including Waterfall, Agile & DevOps

o   Project Management & Requirements Management

o   Coding standards, Code review process & Code management

o   Build, Test & Release Processes

o   CI/CD Frameworks

Technology

·       Use the following frameworks, technology & tools

o    Java, PYTHON, Jquery, React, , 

o   API, REST, DJango

o   Docker, 

o   Git, Jenkins

o   Linux

o   MySQL,