Full Stack Developer- Contractor/ Freelancer/ Part-time

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)

Greetings!

Wissen Technology is hiring for Python developers.

Required:

• 7+ years of experience
• Looking for core application developer in Python. (Not a ML/Data scientist)
• Must have hands on experience on Python
• Must have exposure in OOPS & SOA concepts
• Exposure in Flask APIs for building Rest APIs
• Good to have exposure on Java or React

Company Profile:

Website : www.wissen.com

Wissen Thought leadership : https://www.wissen.com/articles/

https://www.youtube.com/watch?v=H_rLmHvlOKg

Employee Speak: https://www.ambitionbox.com/overview/wissen-technology-overview

LinkedIn: https://www.linkedin.com/company/wissen-technology

Key Responsibilities:

• Develop and maintain scalable and performant full-stack web applications
• Collaborate with UI/UX designers and backend teams to implement responsive, user-friendly interfaces
• Write unit tests using Jest and ensure code quality and reliability
• Develop RESTful APIs using Node.js and NestJS framework
• Utilize Docker Compose for local development and deployment
• Manage and optimize MySQL databases, including views, stored procedures, and performance tuning
• Implement access control mechanisms using identity providers like Okta or Auth0
• Document APIs using tools like SwaggerUI and Postman
• Participate in sprint planning, code reviews, and team stand-ups via JIRA and Confluence
• Use Git for version control and manage merge requests and branches effectively
• Integrate application loggers for monitoring and diagnostics

Must-Have Skills:

• Proficiency in HTML, CSS, SASS/SCSS
• Strong hands-on experience with Angular 18 or higher
• Familiarity with Angular Material or similar UI component libraries
• Experience with Node.js and NestJS 10+
• Working knowledge of Docker Compose
• Strong SQL skills and experience with MySQL
• Understanding of authentication and authorization best practices with Okta, Auth0, etc.
• Comfort using Postman, SwaggerUI, Git, and logging tools
• Familiarity with agile development processes and using JIRA and Confluence

Nice to Have:

• Experience with form builders like Formsite or FormSort
• Knowledge of data encryption best practices
• Prior experience in the public health or POSIT (Public Health Informatics) domain

Qualifications:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field
• 3–6 years of experience in full-stack development
• Strong communication skills and the ability to work independently in a remote team environment

Availability to work UK shift hours to ensure overlap with the US-based client

●       Deep knowledge and hands-on experience of Java & UI stack.

●       Proficient experience of web technologies, frameworks and tools like HTML, CSS, JavaScript, React, NodeJS, XML, jQuery, Spring, etc.

●       Should be well versed with State Management, Redux, Reducers, Java Script, CSS in ReactJS/UI

●       Practical experience of test-driven development and constant refactoring in continuous integration environment.

●       Experience in Oracle PL/SQL programming is required, knowledge of SQL and relational databases

●       Experience working in an agile team, practicing Scrum, Kanban, or XP

●       Experience of performing Functional Analysis is highly desirable.

●       Excellent communication and teamwork skills.

People skills:

●       End to end ownership in driving team towards delivery.

●       Performance and productivity orientation to promote high-quality results.

●       Profound analytical skills and problem-solving abilities.

●       Good communication and excellent interpersonal skills.

●       Pro-active and flexible working approach.

●       Ability to think outside the box to resolve problems.

●       Efficient and well organized, detail oriented.

Responsibilities

• Design and develop REST-based web services utilizing Java micro services web frameworks (Spring Boot)
• Apply design principles and patterns in creating enterprise level solutions, as needed
• Perform web services tuning and performance testing
• Implement unit tests as needed
• Support front-end developers in leveraging web services
• Automate/script common developer tasks, continually optimize personal and team workflows
• Infrastructure setup and configuration
• Engage in code review and feedback process
• Take a feature from inception to completion independently across the stack
• Collaborate with teammates on proposed UX/UI and provide feedback as needed
• Participate in and support the entire SDLC processes

Requirements

• Spring Boot, Spring Security, Spring JPA & Hibernate
• Relational data modelling concepts and experience in PostgreSQL, MySQL, or similar
• Adopted opinionated RESTful web services design patterns
• Microservices-based application architecture
• Application containerization technologies, including Docker, Kubernetes, and cloud-vendor implementations (AWS, Azure, other)
• Other modern technologies relevant to the technology stack defined here
• Javascript ES6 or later
• React
• Git

1. Building REST APIs using Node.js, Express, and MongoDB
2. Working on Flutter application development using various advanced strategies like state management, API integrations, and scalable databases
3. Working with Socket.io library for Flutter and Node.js product development
4. Learning and developing the cryptographic functions for product security
5. Managing product workloads on public/private cloud - we are currently on AWS & also planning to be on GCP/Azure (our platform would also be available as on-premise deployment, you will handle these deployments)
6. Develop API based architecture in order to ensure the business growth and integration-al capabilities of the product
7. Work on using GIT and CI-CD for product version control and continuous delivery

We're looking for a Full Stack developer who will take a key role on our team. Our Full Stack developer must have knowledge in all stages of software development.

Requirements:

• Design overall architecture of the web application.
• Maintain quality and ensure responsiveness of applications.
• Collaborate with the rest of the engineering team to design and launch new features.
• Maintain code integrity and organisation.
• Experience working with graphic designers and converting designs to visual elements.
• Understanding and implementation of security and data protection.
• Highly experienced with back-end programming with NodeJS, you can easily design and integrate the REST APIs with front end.
• Well versed with JavaScript (frameworks such as ReactJS).
• Development experience for both mobile and desktop.
• Experience with cloud message APIs and usage of push notifications.
• Knowledge of code versioning tools such as Git.
• Knowledge about Firebase & GoLang is an added advantage.