Freelance Developer

Location: Bangalore

Experience: 5 to 10 years

Joiners: Immediate / Notice Period < 30 days

Company: Wissen Technology

🔍 Job Overview:

We are looking for a passionate and skilled Fullstack Developer with strong backend expertise in Java and advanced frontend proficiency in React, JavaScript, and TypeScript. The ideal candidate will have a deep understanding of core computer science concepts like Multithreading, Collections, and Immutability, and should be highly proficient in building scalable, maintainable systems.

🛠️ Key Responsibilities:

• Design and develop robust, scalable backend systems using Java (preferably Java 8 or higher).
• Build interactive, high-performance UIs using React.js, JavaScript, and TypeScript.
• Implement complex business logic with clean and maintainable code.
• Write efficient, thread-safe code utilizing Multithreading, HashMaps, HashSets, and Collections.
• Work with iterators and immutability principles to build reliable data flows.
• Collaborate with product managers, designers, and QA teams in an Agile environment.
• Troubleshoot and debug production issues as needed.

✅ Must-Have Skills:

• Strong programming experience in Core Java, Multithreading, and Java Collections Framework.
• Solid knowledge of React.js, JavaScript (ES6+), and TypeScript.
• Hands-on with HashMap, HashSet, Iterators, and Immutable Data Structures.
• Experience working with REST APIs, Spring Boot, and microservice architectures.
• Familiarity with version control systems like Git and CI/CD pipelines.
• Strong problem-solving and analytical skills.

💼 Good to Have:

• Exposure to cloud platforms (AWS, GCP, Azure).
• Experience with state management tools like Redux or Context API.
• Knowledge of performance optimization and memory management in JavaScript.

Full Stack Developer Intern

Company: BizDateUp Pvt Ltd

Location: Charni Road, Mumbai

Employment Type: Internship

(Immediate Joining Preferred)

Experience Level: Entry / Mid-Level(0 – 1 year experience)

Stipend: As per company standards

About

BizDateUp Pvt Ltd BizDateUp Pvt Ltd is a dynamic and fast-paced technology startup committed to building innovative solutions. We believe in fostering a collaborative environment where our team members can learn, grow, and make a tangible impact on real-world projects. Join us to kickstart your career in a supportive and challenging setting. About the Role We are looking for a highly motivated and enthusiastic Full Stack Developer Intern to join our growing tech team. This is an exceptional opportunity for aspiring developers to gain hands-on experience with modern web technologies, contribute to live projects, and receive mentorship from experienced professionals. If you're passionate about building scalable full-stack applications and eager to learn in a startup environment, we encourage you to apply. Key Responsibilities As a Full Stack Developer Intern, you'll be an integral part of our development team, contributing to the full software development lifecycle.

Your responsibilities will include:

• Code Review and Analysis: o Review and analyze existing codebase to understand functionality, identify areas for optimization, and ensure adherence to best practices. o Participate in code reviews with senior developers, providing constructive feedback and learning from their insights.

• Front-End Development: o Assist in building responsive and intuitive user interfaces using React.js. o Implement new features and functionalities based on design specifications and user stories. o Debug and resolve issues related to the front-end application.

• Back-End Development: o Support the development of robust and scalable server-side applications using Node.js and Express.js. o Contribute to the design and implementation of RESTful APIs to facilitate communication between front-end and back-end systems. o Work with PostgreSQL to manage and query databases, ensuring data integrity and efficient retrieval.

• Collaboration and Learning: o Collaborate closely with senior developers, product managers, and other team members to understand project requirements and deliver high-quality solutions. o Actively participate in team meetings, stand-ups, and brainstorming sessions. o Proactively seek feedback and mentorship from experienced developers to enhance your technical skills and understanding.

• Testing and Debugging: o Assist in writing unit and integration tests to ensure the reliability and stability of applications. o Identify, analyze, and resolve bugs and performance issues across both front-end and back-end systems.

• Version Control: o Utilize Git for version control, including branching, merging, and pull requests, to manage codebase effectively within a team environment.

• Documentation: o Contribute to the creation and maintenance of technical documentation for features, APIs, and system architecture. Required Skills To succeed in this role, you should have a foundational understanding and practical experience with the following technologies: • Programming Languages: Strong command of TypeScript and JavaScript. • Frontend Framework: Proficiency in React.js.

• Backend Technologies: Experience with Node.js and Express.js.

• Database: Familiarity with PostgreSQL.

• Version Control: Working knowledge of Git.

• APIs: Understanding of RESTful APIs.

Eligibility Criteria

• Currently pursuing or have completed a BCA / B.Tech / B.Sc in Computer Science or a closely related field.

• Possess strong problem-solving skills and a genuine eagerness to learn and adapt to new technologies.

• Demonstrate a strong passion for building full-stack applications and a desire to contribute to innovative projects.

Perks & Benefits

We are committed to providing a rewarding internship experience. As a Full Stack Developer Intern at BizDateUp Pvt Ltd, you will enjoy:

• Hands-on Experience: Work directly with modern web technologies and contribute to real-time projects.

• Mentorship: Receive guidance and support from experienced senior developers who are invested in your growth.

• Learning Opportunity: Gain invaluable insights into the full software development lifecycle in a fast-paced startup.

• Internship Certificate: A certificate of internship will be provided upon successful completion of your tenure.

• Potential for Full-Time Conversion: Exceptional performance during your internship may lead to an offer for a full-time position.

Senior Full-Stack Engineer

To be successful in your role, it is important that you have…

• Bachelor’s Degree or equivalent in Computer Science or related field

• 5+ years of using .NET/.NET Core, C#, Angular, JavaScript, HTML

• 5+ years of experience with databases preferably SQL Server and T-SQL

• C# development with multi-threading principles, good knowledge of .Net data structure and objects.

• Experience with working with/ troubleshooting large volume SQL Server databases

• Experience with REST (XML, JSON), SOAP Web Services development using ASP.NET, Web API

• Experience and belief in CI/CD/DevOps

• Strong software product development/engineering with complete understanding of SDLC

• Strong full stack developer and good knowledge of frameworks

• Ability to independently deliver on stories

• Experience mentoring junior developers

• Ability to juggle multiple tasks and prioritize time as per the need

• Effective communication and collaboration and problem-solving skills.

In this role, you will have the opportunity to…

• Develop code for complex problems using .NET/.NET Core, C#, JavaScript, HTML, Angular primarily

• Create REST based API for data driven solutions

• Develop unit test cases to confidently ship your feature.

• Work with Product Owners to understand requirements and help design solutions

• Work in an agile environment

• Work in CI/CD environment using Azure DevOps

• Document design and code development for modules using Confluence

• Help mentor junior resources to implement industry best practices

RESPONSIBILITIES

• Become an expert in our technology and platforms
• Provide top-tier, highly skilled and attentive support to our consumer app teams.
• Perform production support, troubleshooting and maintenance tasks with a focus on quality and timeliness
• Work with the Implementations and Delivery Teams on defect resolution and solution delivery
• As an active member of the backend team you would utilize and promote best practices and standards
• You’ll develop new technical skills and gain industry knowledge
• You’ll provide occasional “after-hours” incident response and support
• Maintain software to integrate with internal back-end systems
• Build tools to reduce occurence of errors and improve customer experience
• Manage system troubleshooting and maintenance.

Required skills and qualifications

• 4+ years’ experience supporting Web and Backend based application software and environments preferred

• Ability to prioritize effectively and handle shifting priorities professionally

• Experience with version management systems like GIT, Subversion

• Knowledge on Payment gateways (Razorpay, Juspay)

• Experience with web application servers, basic idea on AWS and Azure

• Databases (SQL and NoSQL) and SQL query language.

• Good understanding of Networking principles.

• An understanding and background with Object Oriented Programming languages

• Required Full stack development knowledge.

Preferred skills and qualifications

• Bachelor of science degree (or equivalent) in computer science, engineering, or relevant field

You will make an ideal candidate if you have: 

• Overall 6+  years of software development experience in building web-based and highly scalable applications 

• Excellent understanding of core computer science concepts like algorithms, data structure, system design, OOP, etc. 

• Deep knowledge and development expertise in Core Java and SpringBoot 

• Experience in using dockers and Linux.

• Hands-on coding experience in developing web applications with REST APIs

• Good understanding/exposure to Kafka and Elastic.(must have)

• Log stash understanding is add-on

• Worked in a CI/CD environment with Jenkins and handled deployments by yourself 

• Experience working in an agile team with software engineering practices like automated testing, test-driven-development, continuous integration, etc is a big plus. 

1. Extensive experience in Javascript / NodeJS in the back end
2. Front end frameworks such as Bootstrap, Pug, Jquery
3. Experience in web frameworks like ExpressJS, Webpack
4. Experience in Nginx, Redis, Apache Kafka and MQTT
5. Experience with MongoDB
6. Experience with Version Control Systems like Git / Mercurial
7. Sound knowledge in Software engineering best practices
8. Sound knowledge in RestFul API Design
9. Working knowledge of Automated testing tools
10. Experience in maintaining production servers (Optional)
11. Experience with Azure DevOps (Optional)

1. Experience in digital payments or financial services industry is a plus.
2. Participation in the processes of strategic project-planning meetings.
3. Be involved and participate in the overall application lifecycle.
4. Collaborate with External Development Teams.
5. Define and communicate technical and design requirements, understanding workflows and write code as per requirements.
6. Develop functional and sustainable web applications with clean codes.
7. Focus on coding and debugging.