Full Stack Developer (Node.js, React)

Job Title: Full Stack Developer (Java + React)

Location: Bangalore

Experience Level: 6–10 Years

Employment Type: Full-time

Job Summary-

Wissen Technology is looking for a skilled Full Stack Developer with strong experience in Java (backend) and React (frontend) to join our engineering team. You will be responsible for designing, developing, and maintaining scalable web applications, collaborating with cross-functional teams, and delivering high-quality software solutions.

Key Responsibilities

• Design, develop, and maintain robust, scalable, and secure web applications
• Build RESTful APIs using Java-based frameworks
• Develop responsive and dynamic user interfaces using React
• Collaborate with product managers, designers, and other developers to define and deliver features
• Write clean, maintainable, and efficient code following best practices
• Perform code reviews and mentor junior developers
• Troubleshoot, debug, and upgrade existing applications
• Ensure application performance, quality, and responsiveness
• Participate in Agile/Scrum development processes

Required Skills & Qualifications

• Strong proficiency in Java (8 or above) and backend frameworks such as Spring Boot
• Solid experience with React.js, including hooks, state management, and component lifecycle
• Experience building and consuming REST APIs
• Familiarity with frontend technologies: HTML5, CSS3, JavaScript (ES6+)
• Knowledge of databases such as MySQL, PostgreSQL, or MongoDB
• Experience with version control systems like Git
• Understanding of software development principles, design patterns, and data structures
• Familiarity with build tools like Maven or Gradle
• Basic understanding of cloud platforms (AWS, Azure, or GCP) is a plus

Job Title: AI Developer/Engineer

Location: Remote

Employment Type: Full-time

About the Organization 

We are a cutting-edge AI-powered startup that is revolutionizing data management and content generation. Our platform harnesses the power of generative AI and natural language processing to turn unstructured data into actionable insights, providing businesses with real-time, intelligent content and driving operational efficiency. As we scale, we are looking for an experienced lead architect to help design and build our next-generation AI-driven solutions.

About the Role

We are seeking an AI Developer to design, fine-tune, and deploy advanced Large Language Models (LLMs) and AI agents across healthcare and SMB workflows. You will work with cutting-edge technologies—OpenAI, Claude, LLaMA, Gemini, Grok—building robust pipelines and scalable solutions that directly impact real-world hospital use cases such as risk calculators, clinical protocol optimization, and intelligent decision support.

Key Responsibilities

• Build, fine-tune, and customize LLMs and AI agents for production-grade workflows
• Leverage Node.js for backend development and integration with various cloud services.
• Use AI tools and AI prompts to develop automated processes that enhance data management and client offerings
• Drive the evolution of deployment methodologies, ensuring that AI systems are continuously optimized, tested, and delivered in production-ready environments.
•  Stay up-to-date with emerging AI technologies, cloud platforms, and development methodologies to continually evolve the platform’s capabilities.
• Integrate and manage vector databases such as FAISS and Pinecone.
• Ensure scalability, performance, and compliance in all deployed AI systems.

Required Qualifications

• 2–3 years of hands-on experience in AI/ML development or full-stack AI integration.
• ​​Proven expertise in building Generative AI models and AI-powered applications, especially in a cloud environment.
• Strong experience with multi-cloud infrastructure and platforms,
• Proficiency with Node.js and modern backend frameworks for developing scalable solutions.
• In-depth understanding of AI prompts, natural language processing, and agent-based systems for enhancing decision-making processes.
• Familiarity with AI tools for model training, data processing, and real-time inference tasks.
• Experience working with hybrid cloud solutions, including private and public cloud integration for AI workloads.
• Strong problem-solving skills and a passion for innovation in AI and cloud technologies
• Agile delivery mythology knowledge.
• CI/CD pipeline deployment with JIRA and GitHub knowledge for code deployment
• Strong experience with LLMs, prompt engineering, and fine-tuning.
• Knowledge of vector databases (FAISS, Pinecone, Milvus, or similar).

Nice to Have

• Experience in healthcare AI, digital health, or clinical applications.
• Exposure to multi-agent AI frameworks.

What We Offer

• Flexible working hours. 
• Collaborative, innovation-driven work culture.
• Growth opportunities in a rapidly evolving AI-first environment.

SKILL AND EXPERIENCE REQUIRED:

• 2+ years of experience in Java skills.
• 2+ years of hands-on HTML5/CSS3 experience.
• Experience with popular JavaScript frameworks such as ReactJs or Angular 2.0; experience preferred.
• Experience of working with HTTP 1.1, and HTTP/2.
• Experience with RESTful APIs and JSON RPC.
• Ability to write clean, bug-free code that is easy to understand and easily maintainable.
• Experience following Git workflows.
• Working knowledge of DevOps tools (e.g., Terraform, Ansible, Jenkins, Kubernetes, Helm and CI/CD pipeline etc.).

OREN is a rapidly growing technology business in Sustainability Analytics and Reporting space. Our ambition is to help companies include sustainability into their core business strategies and culture.

We are looking for Fullstack Engineers (MERN) to help us in the next stage of our journey with experience in developing real-time server applications based on Node.js, Express.js, MongoDB databases. As a Full Stack Developer, you should be comfortable around both front-end and back-end coding languages, development frameworks, and third-party libraries. You are expected to work with the best selection of tools, libraries, and cloud platforms to deliver a high-performance, scalable, flexible, reliable, and seamlessly integrated back-end solution to be used with a variety of mobile and web-browser-based clients.

Responsibilities :

-- Design and write lots of bug-free, efficient, scalable, and reusable code

-- Design & develop full-stack modules and components and promote coding best practices

-- Develop APIs and scripts using backend programming languages like Node.js

-- Design and implementation of low-latency, high-availability, and performant applications

-- Ability to work independently with minimum supervision

-- You will have ownership of developing and maintaining various backend services that support features in our application and website

-- Integrating solutions to enterprise software and legacy software

-- Manage project priorities, deadlines, and deliverables

-- Develop and manage well-functioning databases and applications

-- Ensuring responsiveness of applications

Requirements:

- 4+ years professional software engineering experience

- Bachelor's degree in Computer Science or a related field (or foreign equivalent)

- Proven experience in high-level programming languages like Node.js and Express.js with state management tools like Redux

- Good understanding of React, Next.JS, Bootstrap, and Material UI

- Thorough understanding of modeling and scaling databases like Firestore, and SQL

- Expertise in developing micro-services based REST APIs and exposure to API Gateway (GraphQL a plus)

- Should be well-versed with collaboration tools like Git and Swagger

- Significant experience in developing high performance, distributed, and scalable applications with container deployment (Docker and Kubernetes)

- Comfortable working within GCP, AWS, Azure, or equivalent ecosystem

-Bonus point: Experience working with ML and recommendation systems

- Knowledge on open-source technologies such as NoSQL, MongoDB, Data Formats (XML / JSON), JavaScript Frameworks ReactJS, JS, JQuery, CSS, HTML5, in memory databases, Build tools like webpack.

- Preference will be given to the Immediate joiner

- Should be a team player, have a positive outlook towards challenges, and contribute to the growth of the team and company

Interview process:
1st Round - Techincal Assessment: a) Online Quiz b) Take Home Assignment
2nd Round - Joint video call discussion with Co-Founder and CTO

Oren is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, age, religion, sex, sexual orientation, gender identity or expression, marital status, domestic partner status, national origin, genetics, disability, military and veteran status, and other protected characteristics.

• Strong knowledge of PHP for backend work (3+ years’ experience)
• Experience with an MVC framework (CakePHP, Laravel, Symfony, CodeIgniter, etc.)
• Strong knowledge of Javascript, HTML, CSS and related tools/packages (3+ years’ experience),
• Strong knowledge of MySQL (3+ years’ experience)
• Knowledge of React
• Though not required, experience with Python, Golang, DynamoDB, Elasticsearch.
• Strong English skills (written and verbal)

We are looking for a Shopify app developer on an urgent basis. The candidate should have a minimum of 2 years of experience in Shopify custom app development for private and public apps.

Job Description:

• Proficient in Liquid, HTML/CSS, React JS & Node.
• Must have hands-on experience in Databases. (MongoDB)
• Proficient understanding of code versioning tools, such as Git
• Aware of Shopify variables and Shopify API.
• Building reusable code and libraries for future use.
• Should have good communication & management skills for daily sprints.

We are looking for a Senior Full Stack Rails Web developer with good communication skills. The Candidate MUST have good communication skills and should be comfortable taking Phone/Video calls with US employees.

Please see below the technical skillset required:

• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Strong Proficiency in HTML/CSS and experience with Bootstrap and FontAwesome
• Thorough understanding of ReactJS and its core principles
• Experience with popular ReactJS workflows (such as Flux and Redux)
• Experience with AngularJS
• Experience with NPM and NodeJS
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Experience with common front-end development tools such as Babel, Webpack, etc.
• Experience with popular frameworks like EmberJS, BackboneJS, KnockoutJS and Vue is a plus.

• Solid understanding of Ruby along with Rails 3, 4 and 5
• Solid understanding of gems like with devise, ActiveAdmin, Clockwork, SideKiq, Ransack
• Proficient with ActionCable, EventMachine, Websocket
• Excellent understanding of Rails query interface and DBMS like Mysql, sqlite, postgreSQL
• Proficient in creating test suites using Cucumber, Capybara, RSpecs, Minitests etc
• Proficient in HTML/CSS/Sass
• Experience in AWS Elastic Beanstalk and Capistrano deployments is a plus
• Experience in creating Ruby programs/scripts to automate tasks is a plus
• Experience with CMS systems like BrowserCMS is a plus

• Exp – 9+ yrs
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization is a solid plus
• Experience in GoLang and/or Rails and desire to work on back-end applications is a solid plus