Key Responsibilities
- Frontend Development: Designing and building responsive, interactive user interfaces using React.js, HTML5, CSS3, and modern JavaScript (ES6+).
- Backend Development: Developing robust, scalable server-side applications and microservices using Java and the Spring Boot framework.
- API Integration: Creating and consuming RESTful APIs to ensure seamless communication between the React frontend and the Java backend.
- Database Management: Designing and optimizing database schemas and queries using SQL (e.g., MySQL, PostgreSQL, Oracle) or NoSQL (e.g., MongoDB) databases.
- State Management: Managing application state in React using tools like Redux, Hooks, or Context API.
- Testing & Quality Assurance: Writing unit and integration tests using frameworks such as JUnit for backend and Jest or React Testing Library for frontend.
- DevOps & Deployment: Collaborating on CI/CD pipelines and using containerization tools like Docker and Kubernetes for application deployment.
- Indeed
- +14
Required Skills & Qualifications
- Core Technical Skills:
- Deep proficiency in Java (8+) and the Spring ecosystem (Spring Boot, Spring Security, Spring Data JPA).
- Expertise in React.js workflows, component-based architecture, and hooks.
- Strong understanding of Microservices architecture and cloud platforms (AWS, Azure, or GCP).
- Experience & Education:
- Typically requires a Bachelor's degree in Computer Science or a related field.
- Proven experience (often 1–5+ years depending on seniority) in full-stack development.
- Tools: Version control systems like Git, build tools like Maven or Gradle, and Agile project management tools like Jira.
- Indeed
- +13
Typical Salary Ranges (India)
- Freshers: ₹3.8 Lakh to ₹12 Lakh per year.
- Experienced (5+ years): ₹18 Lakh to ₹30 Lakh+ per year.
- Average (General): Approximately ₹29 Lakh per year for high-demand specialized roles.

About AppyHappy Software
About
Similar jobs
Minimum requirements
5+ years of industry software engineering experience (does not include internships nor includes co-ops)
Strong coding skills in any programming language (we understand new languages can be learned on the job so our interview process is language agnostic)
Strong collaboration skills, can work across workstreams within your team and contribute to your peers’ success
Have the ability to thrive on a high level of autonomy, responsibility, and think of yourself as entrepreneurial
Interest in working as a generalist across varying technologies and stacks to solve problems and delight both internal and external users
Preferred Qualifications
Experience with large-scale financial tracking systems
Good understanding and practical knowledge in cloud based services (e.g. gRPC, GraphQL, Docker/Kubernetes, cloud services such as AWS, etc.)
About the role:
You will own a functional area - from product conception to its delivery to customers. You are expected to design and code independently in multiple tech components related to your functional area. You must also develop a deep understanding of non-functional requirements, such as reliability and availability, scale, horizontal scalability, etc. over time to make tech stack decisions accordingly. You are expected to actively mentor junior engineers. You own
the codebase quality.
We are looking for seasoned engineers who are quality-conscious, product thinkers, business cognizant and smart. Engineers get to significantly amplify the impact of their work or creations with scale. The scale also demands that engineers to produce super-efficient solutions.
What you’ll do
- Strong experience with Java 8, Spring and Spring Boot, Spring MVC, Spring Data,
- Working experience in Microservices
- Version Control: Git
- Strong understanding of functional/reactive programming, OOP, design
- Experience with Docker and Kubernetes.
- SDLC: Working experience in Agile methodology
- Strong interpersonal skills and time management skills
What you’ll need
- B.Tech or M.Tech equivalent with at least 3 years of experience
- Deep expertise in at least one programming language & tech stack.
- Strong object-oriented design skills, ability to apply design patterns, and an uncanny ability to design intuitive module and class-level interfaces
- Experience in building data-driven web application design and development is a plus
- Good understanding of multiple tech solutions and ability to pick the correct one for the given situation
- Prior work experience in an agile environment or continuous integration and continuous delivery (CI or CD)
- Ability and experience in designing high-level software designs of the scalable system, taking NFR (non-functional requirement) into consideration
Minimum 3+ Years of Core Java Programming with Collections Framework, Concurrent Programming, Multi-threading (Good knowledge in Executor service, Fork joins pool and other threading concepts)
· Good knowledge of the JVM with an understanding of performance and memory optimization.
· Extensive and expert programming experience in JAVA programming language (strong OO skills preferred).
· Excellent knowledge on collections like, Array List, Vector, LinkedList, HashMap, Hash Table, HashSet is mandate.
· Exercised exemplary development practices including design specification, coding standards, unit testing, and code-reviews.
· Expert level understanding of Object-Oriented Concepts and Data Structures
· Good experience in Database (Sybase, Oracle or SQL Server) like indexing (clustered, non-clustered), hashing, segmenting, data types like clob / blob, views (materialized), replication, constraints, functions, triggers, procedures etc.
We are seeking a skilled NestJS/PostgreSQL Developer to join our development team. As a NestJS/PostgreSQL Developer, you will be responsible for designing and implementing server-side applications, APIs, and databases using NestJS framework and PostgreSQL. You will work closely with other developers, stakeholders, and project managers to deliver high-quality software solutions.
Responsibilities:
- Develop server-side applications and APIs using the NestJS framework.
- Design and implement efficient and scalable database schemas using PostgreSQL.
- Collaborate with front-end developers to integrate server-side logic with the user interface.
- Write clean and maintainable code following best practices and coding standards.
- Conduct code reviews and provide constructive feedback to improve code quality.
- Optimize application performance and troubleshoot any issues or bugs.
- Work closely with stakeholders to understand requirements and translate them into technical solutions.
- Participate in the entire software development lifecycle, including planning, designing, coding, testing, and deployment.
- Stay up-to-date with the latest trends and technologies in web development, NestJS, and PostgreSQL.
Requirements:
- Bachelor's degree in Computer Science, Engineering, or a related field.
- Proven experience (2-5 years) in server-side application development using NestJS framework.
- Strong knowledge of TypeScript and JavaScript.
- Experience with PostgreSQL or other relational databases.
- Proficiency in building and consuming RESTful APIs.
- Familiarity with Git version control system.
- Good understanding of software development principles, design patterns, and best practices.
- Excellent problem-solving and debugging skills.
- Strong communication and collaboration skills.
- Ability to work independently as well as in a team environment.
Preferred Qualifications:
- Experience with other JavaScript frameworks such as Angular or React.
- Knowledge of microservices architecture and containerization (e.g., Docker).
- Familiarity with cloud platforms like AWS, Azure, or GCP.
- Experience with testing frameworks (e.g., Jest, Jasmine).
- Understanding of Agile/Scrum development methodologies.
Responsibilities
- Understand the high-level product roadmap for the squad and immediate features to be developed, contributing to high-level estimation and lay-out of the development sequences. Complete complex development tasks with minimal guidance
- Constantly and actively contribute to pushing code to production with the objective of becoming a main contributor. Write testable, efficient, and reusable code suitable for continuous integration and deployment, that respects best practices and industry development standards
- Review Unified Modeling Language (UML) diagrams and technical documentation, ensuring its quality. Enable best practices to help the team achieve their technical tasks and continually thrive in improving the technology of the product/team.
- Drive the adoption of best practices & regular participation in code reviews, design reviews, architecture discussions
- Experiment with new and relevant technologies, and tools, and drive innovation & adoption while measuring yourself on the impact you can create.
- Implementation of long-term technology vision for your team. Responsible for the complete architecture of your product.
- Creating architecture & designs for new solutions around existing/new areas u Decide technology & tool choices for your team & be responsible for them.
- Be accountable for code quality with the assistance of a QA Analyst to conduct adequate testing.
- Review and contribute to technical documentation. Contribute actively to the design of the solution, challenging other members on technical decisions.
Skills
- Working with other TypeScript developers and software engineers to develop Front-end and back-end architecture that’s well-structured and flexible, along with the APIs to support it.
- Developing and implementing Back-end architecture to support user interface concepts.
- Developing and implementing highly responsive user interface components using Node concepts.
- Create data visualization tools, libraries, and reusable code for prospects.
- In-depth knowledge of TypeScript, CSS, HTML, and back-end languages.
- Knowledge of Backend service like AWS Services, Microservice, Serverless software.
Qualifications
- Bachelor's degree in computer science, computer engineering, or related field.
- Proficiency with TypeScript, CSS, HTML, and Back-end languages.
- 7+ years’ experience in Node JS, Typescript, NoSQL, RDBMS, AWS Services
- The ability to learn new technologies quickly
- The ability to communicate complex procedures to other colleagues.
● Execute these via designs and high quality implementations in Java and/or Python.
● Work with frontend engineer to clearly demarcate division of responsibilities via REST based interfaces.
● Focus on solutions that deliver non functional requirements around performance, scalability, security, high availability, monitorability, debuggability and other such concerns.
● Evaluate new technologies and build prototypes for continuous improvements
● Very strong real world experience on Java, Springboot, Microservices.
● Advocate best practices and standards
Signalling, interlocking system
• Participate in Requirement Analysis and Design activities
• Develop code, unit testing, integration testing
• Perform module integration and integration testing
• Prepare and review Test Reports
• Actively participate in technical meetings and share ideas clearly
• Manage a team of engineers and provide leadership with clear communication
• Good at documentation
• And any other project related activity assigned
Commercial software development experience
Strong object-oriented design and coding skills in Java, springboot, Hibernate, Microservices.
Strong understanding of data structures and algorithms
Experience leading a team of software engineers
Experience with accurately measuring the productivity of a team
Experience writing scalable software
Ability to work collaboratively within a team environment of engineers
Excellent English Speaking and Writing skills
Experience with web services technology (REST, SOAP, etc)
Primary Responsibilities:
- Principal Engineers are responsible for driving Technology and Engineering Best Practices in their respective teams.
- They should demonstrate a high level of ownership and accountability for their product and software systems.
- They are expected to go above and beyond their role by contributing in tools, processes and practices which bring operational efficiency and are aligned with business goals.
- They are expected to actively participate in development along with team members and create systems and modules which represent a working model of engineering best practices.
- They are expected to participate in code reviews, design reviews, architecture discussions.
- They are responsible for the Engineering metrics/health of their systems including strong alerting and monitoring mechanisms.
- They are expected to lead the adoption of best practices around coding, designing, performance of systems in a team.
Experience or Skills Required:
- B.Tech or Advanced degree in Computer Science with 6-12 years of industry experience in product based companies.
- Proficiency with Basic libraries for machine learning such as scikit-learn and pandas
- Experience in building solutions based on Linear Regression, Logistic Regression, K Nearest neighbor, SVM, Random Forest, Decision Trees.
- Strong experience with at least one of programming languages: Python, Java, Vertx, Golang
- Strong experience in building Server side reusable components based on Microservices or Distributed Architecture.
- Solid coding skills with ability to lead teams in identifying clearing tech debts for large scale code base.
- Good understanding & experience in improving performance of scalable and real time responsive applications.
- Excellent Problem Solving skills and an aptitude to approach problems from first principles and build solutions for those.
- Must have excellent communication (verbal & written), interpersonal, leadership, and problem solving skills.
- Must be able to work independently and enjoy working at a fast paced start-up environment
- Excellent Mentoring skills. Be the technical mentor to your team.
- Must be comfortable working in fuzzy environments where boundaries are not clearly defined.
You will get to design, architect and develop complex enterprise software and SaaS web applications leveraging modern web stack.
Roles & Responsibilities
Design & build highly scalable, high performance, responsive web applications.
Take full ownership and responsibility for building, shipping, and maintaining core product features, end to end. Help out in building the backend & front-end infrastructure.
Translation of requirements, designs and wireframes into high quality code. Collaborate closely with designers, engineers, founders and product managers.
Mentor team members and review their work.
You will enjoy this role if you...
Are a geek with a desire to stay ahead of the curve.
Like building beautiful well-architected software products with millions of users.
Work collaboratively as part of a close-knit team of geeks, architects and leads.
Desired Skills & Experience:
2 - 6 years of production experience with modern web frameworks - Ruby on Rails, Phoenix/Elixir and/or Django/Python.
Should have sound experience in developing scalable / distributed SaaS apps
Should have good knowledge and work experience in REST API implementations, JSON format handling, caching, sessions, multi-threading, etc.
Should be comfortable with database schema design and leveraging SQL & NoSQL (PostgreSQL, MySQL, Redis, Elasticsearch, DynamoDB)
Experience developing, consuming and transforming internal and 3rd party API's (REST and GraphQL)
Experience with code quality and reusability practices (CI/CD for back-end & front-end repos)
Solid foundation in data structures, algorithms, distributed systems, design patterns.
Strong understanding of software engineering best practices, including unit testing, code reviews, design documentation, debugging, troubleshooting, and agile development
Communication: You like discussing a plan upfront, welcome collaboration, and are an excellent verbal and written communicator.
Bachelor’s degree in Computer Science or equivalent experience.
Bonus points if you have...
Exposure to front-end technologies like React/Redux, Javascript/Typescript etc.
Cloud native development on AWS or GCP
Experience with implementation of container technologies like Docker, Kubernetes. Knowledge of continuous integration, continuous delivery and enterprise DevOps concepts.







