
There are various job roles within software development, each with its own focus and responsibilities. Some common job roles include:
1. **Software Engineer/Developer**: This role involves designing, developing, and testing software applications or systems.
2. **Front-end Developer**: Front-end developers focus on creating the user interface and experience of websites or applications using languages like HTML, CSS, and JavaScript.
3. **Back-end Developer**: Back-end developers work on the server-side of applications, managing databases, servers, and application logic using languages like Python, Java, or Node.js.
4. **Full-stack Developer**: Full-stack developers have expertise in both front-end and back-end development, allowing them to work on all aspects of an application.
5. **Mobile App Developer**: Mobile app developers specialize in creating applications for mobile devices, often using platforms like iOS (Swift) or Android (Java/Kotlin).
6. **DevOps Engineer**: DevOps engineers focus on streamlining the development process by automating tasks, managing infrastructure, and ensuring smooth deployment and operation of software.
7. **Quality Assurance (QA) Engineer**: QA engineers are responsible for testing software to ensure it meets quality standards and is free of bugs or errors.
8. **UI/UX Designer**: UI/UX designers work on designing the user interface and experience of software applications, focusing on usability and aesthetics.

About CodesCastle Software Pvt Ltd
About
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- Strong Software Engineering Profile
- Mandatory (Experience 1): Must have 5+ years of experience using Python to design software solutions.
- Mandatory (Skills 1): Strong working experience with Python (with Django framework experience) and Microservices architecture is a must.
- Mandatory (Skills 2): Must have experience with event-driven architectures using Kafka
- Mandatory (Skills 3): Must have Experience in DevOps practices and container orchestration using Kubernetes, along with cloud platforms like AWS, GCP, or Azure
- Mandatory (Company): Product companies, Experience working in fintech, banking, or product companies is a plus.
- Mandatory (Education): From IIT (Candidate should have done bachelor degree Btech or Dual degree Btech+Mtech or Intergrated Msc), From other premium institutes NIT, MNNIT, VITS, BITS (Candidates should have done B.E/B.Tech)
We are seeking a highly skilled React JS Developer with exceptional DOM manipulation expertise and real-time data handling experience to join our team. You'll be building and optimizing high-performance user interfaces for stock market trading applications where milliseconds matter and data flows continuously.
The ideal candidate thrives in fast-paced environments, understands the intricacies of browser performance, and has hands-on experience with WebSockets and real-time data streaming architectures.
Key Responsibilities
Core Development
- Advanced DOM Operations: Implement complex, performance-optimized DOM manipulations for real-time trading interfaces
- Real-time Data Management: Build robust WebSocket connections and handle high-frequency data streams with minimal latency
- Performance Engineering: Create lightning-fast, scalable front-end applications that process thousands of market updates per second
- Custom Component Architecture: Design and build reusable, high-performance React components optimized for trading workflows
Collaboration & Integration
- Work closely with traders, quants, and backend developers to translate complex trading requirements into intuitive interfaces
- Collaborate with UX/UI designers and product managers to create responsive, trader-focused experiences
- Integrate with real-time market data APIs and trading execution systems
Technical Excellence
- Implement sophisticated data visualizations and interactive charts using libraries like Chartjs, TradingView, or custom D3.js solutions
- Ensure cross-browser compatibility and responsiveness across multiple devices and screen sizes
- Debug and resolve complex performance issues, particularly in real-time data processing and rendering
- Maintain high-quality code through reviews, testing, and comprehensive documentation
Required Skills & Experience
React & JavaScript Mastery
- 5+ years of professional React.js development with deep understanding of React internals, hooks, and advanced patterns
- Expert-level JavaScript (ES6+) with strong proficiency in asynchronous programming, closures, and memory management
- Advanced HTML5 & CSS3 skills with focus on performance and cross-browser compatibility
Real-time & Performance Expertise
- Proven experience with WebSockets and real-time data streaming protocols
- Strong DOM manipulation skills - direct DOM access, virtual scrolling, efficient updates, and performance optimization
- RESTful API integration with experience in handling high-frequency data feeds
- Browser performance optimization - understanding of rendering pipeline, memory management, and profiling tools
Development Tools & Practices
- Proficiency with modern build tools: Webpack, Babel, Vite, or similar
- Experience with Git version control and collaborative development workflows
- Agile/Scrum development environment experience
- Understanding of testing frameworks (Jest, React Testing Library)
Financial Data Visualization
- Experience with financial charting libraries: Chartjs, TradingView, D3.js, or custom visualization solutions
- Understanding of market data structures, order books, and trading terminology
- Knowledge of data streaming optimization techniques for financial applications
Nice-to-Have Skills
Domain Expertise
- Prior experience in stock market, trading, or financial services - understanding of trading workflows, order management, risk systems
- Algorithmic trading knowledge or exposure to quantitative trading systems
- Financial market understanding - equities, derivatives, commodities
Technical Plus Points
- Backend development experience with GoLang, Python, or Node.js
- Database knowledge: SQL, NoSQL, time-series databases (InfluxDB, TimescaleDB)
- Cloud platform experience: AWS, Azure, GCP for deploying scalable applications
- Message queue systems: Redis, RabbitMQ, Kafka, NATS for real-time data processing
- Microservices architecture understanding and API design principles
Advanced Skills
- Service Worker implementation for offline-first applications
- Progressive Web App (PWA) development
- Mobile-first responsive design expertise
Qualifications
- Bachelor's degree in Computer Science, Engineering, or related field (or equivalent professional experience)
- 5+ years of professional React.js development with demonstrable experience in performance-critical applications
- Portfolio or examples of complex real-time applications you've built
- Financial services experience strongly preferred
Why You'll Love Working Here
We're a team that hustles—plain and simple. But we also believe life outside work matters. No cubicles, no suits—just great people doing great work in a space built for comfort and creativity.
What We Offer
💰 Competitive salary – Get paid what you're worth
🌴 Generous paid time off – Recharge and come back sharper
🌍 Work with the best – Collaborate with top-tier global talent
✈️ Adventure together – Annual offsites (mostly outside India) and regular team outings
🎯 Performance rewards – Multiple bonuses for those who go above and beyond
🏥 Health covered – Comprehensive insurance so you're always protected
⚡ Fun, not just work – On-site sports, games, and a lively workspace
🧠 Learn and lead – Regular knowledge-sharing sessions led by your peers
📚 Annual Education Stipend – Take any external course, bootcamp, or certification that makes you better at your craft
🏋️ Stay fit – Gym memberships with equal employer contribution to keep you at your best
🚚 Relocation support – Smooth move? We've got your back
🏆 Friendly competition – Work challenges and extracurricular contests to keep things exciting
We work hard, play hard, and grow together. Join us.

We’re Building the Future of Immigration Tech
We are developing a high-performance, AI-driven immigration platform that automates visa assessments and guidance for high-skilled immigrants. Our focus is on speed, accuracy, and scalability—not a flashy UI, but a powerful decision-making engine that delivers real value.
We need top-tier engineers who build for performance over aesthetics. If you love AI, automation, and disrupting old systems, this is for you.
🛠 Open Roles
1️⃣ AI/ML Engineer (Visa Assessment AI)
- Develop a cutting-edge AI model for visa eligibility assessments.
- Use NLP to process immigration laws, policies, and case precedents.
- Optimize for accuracy, efficiency, and scale (real-time processing).
2️⃣ Full-Stack Developer (Lean & Scalable Web App)
- Build a high-performance, no-frills web app (React/Next.js preferred).
- Integrate the AI model seamlessly into a secure and scalable backend (Python/Django or Node.js).
- Implement fast data retrieval for applicant evaluations.
🔍 Who We’re Looking For
✔ AI/ML Engineer: Strong experience in NLP, AI automation, and structured data processing. Experience with TensorFlow/PyTorch/OpenAI APIs is a plus.
✔ Full-Stack Developer: Expertise in React (Next.js preferred), Python/Django, or Node.js. Must prioritize performance & security.
✔ Both: You’re a problem-solver, performance-obsessed, and thrive in lean environments.
💻 Tech Stack (Recommended, Open to Suggestions)
- AI/ML: Python (FastAPI, TensorFlow, OpenAI APIs, Hugging Face NLP)
- Frontend: React, Next.js (for speed & SEO)
- Backend: Python/Django or Node.js (for performance & scalability)
- Database: PostgreSQL or Firebase
About KAFQA
At Kafqa, we are building the next generation performing arts platform. Our mission is to transform how India learns, performs & watchers performing arts. We are currently in stealth mode with a target public launch date in April. Our launch services consist of technology enabled dance classes in our proprietary studios, production facilities and social media broadcasting & competitions.
Founder & Team
The founder is Shariq Plasticwala. He is a graduate of IIT Bombay & Stanford GSB. He was part of the founding team of Amazon India where he played a key role for over 8 years. Among his roles at Amazon, he was the CEO of Amazon’s first joint venture in India and a Board Member of Amazon’s payments business. The other members of the founding team consist of senior executives from Shiamak Davar & Byju’s.
Role
We are looking for an experienced Frontend engineer with ReactJS development experience to join our team.
Here’s are some of the things you might have to do on any given day:
- Implement responsive and performant UIs with user centered approach with frontend technologies including ReactJS, Javascript(ES 6), Typescript, SCSS, etc
- Write meaningful test cases for frontend &
- Develop Infrastructure for delivering services using a performance driven approach, build databases, schedule automated jobs, etc
Ideal Background / Experience
- At least 12 months of diverse experience in web development for product or services oriented environment with exposure to working production deployments
- Expertise in programming using Python/ReactJS or similar scripting languages
- In-depth exposure to technologies used in web-based SaaS products, including REST APIs
- Sound understanding of Postgres and NoSQL databases such as MongoDB
Nice to have exposure to any of
- AWS
- Azure
- ELK
- Object Relational Models (SQLAlchemy, etc)
- Google APIs
- Microservices Architecture Pattern
- NodeJS / ExpressJS
technologies namely Blockchain, Machine Learning & Artificial Intelligence, Complex mobile & Web
Apps, IoT, etc.Rejolut is a venture-backed company with clients in over several countries namely
Malaysia Airlines,gba global,my-earth,biomes, Dlg-hub,etc.
We are looking for Tech geeks having hands-on experience and in love with building scalable, distributed and large web/mobile products and tech solutions. He/She must be an excellent problem solver with passion to self-learn and implement web technologies (frontend + backend). He/She would be responsible for the architecture design, code review, and technology build and deployment activities of the product.
Required Skills:-
Knowledge of JavaScript
Experience with web development using HTML, JavaScript ,Jquery, CSS 3.
Experience building Responsive Design layouts using a formal framework like BootStrap
Familiar with best practices (ensuring browser & device compatibility, etc.)
Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
Understanding of asynchronous request handling, partial page updates, and AJAX
Basic understanding of web development and hands-on integration experience
Clean coding style with clear separating of UI and functionality.
Building reusable components and front-end libraries for future use
Rejolut - As a Career Differentiator
- We are a young and dynamic team who are obsessed with solving futuristic and evolutionary business problems at scale with the next generation technology like blockchain, crypto and machine learning. Focuses on empowering people across the globe to be technically efficient, making advancements in technology and providing new capabilities that were previously thought impossible.
- We provide exposure to higher learning opportunities so that you can work on complex and cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, WebAssembly. Strong expertise in blockchain and crypto technology and working with the networks like Hedera Hashgraph, Tezos, BlockApps, Algorand, Cardano.
- We maintain high end transparency with clients and employees as visibility unlocks Efficiency and trust unlocks Visibility.
- Company is backed by two technology Co-founders, well-versed with consumer applications and their work has been downloaded millions of times and have led teams in leadership positions in companies like Samsung, Purplle, Loylty Rewardz.
Benefits :
> Health Insurance
> Fast growth and more visibility into the company
> Experience to work on the latest technology
> Competitive Learning Environment with supportive co-workers
> Employee friendly HR Policies
> Paid leaves up to certain limits
> Competitive salaries & Bonuses
> Liberal working atmosphere
> Get mentored by the best in the industry
Schedule:
Day Shift/Flexible working hours
Monday to Friday
1. Strong knowledge in Front end scripting like EJS, JavaScript, Jquery
2. Proficiency with fundamental front-end languages such as HTML, CSS.
3. Familiarity with JavaScript frameworks such as Angular JS, React, and Amber.
4. Proficiency with server-side languages such as Python / Ruby / Java / PHP/ .Net
5. Good Understand with database technology such as MySQL, Oracle, and MongoDB.
Job Description
- 4-5 years of overall experience and 2+ years of experience as full stack developer with skills on Python, Javascript and databases.
- Excellent programming skills and hands-on experience in Python, Java Script, HTML, and CSS.
- Experience of working in Data Science domain is an advantage, but not mandatory.
- Ability to positively contribute to a team and willingness to quickly complete large volumes of work with high quality.
- Excellent analytical and critical thinking skills.
- Excellent verbal and written communication skills.
- BE/BTech or MCA Degree or any graduate with desired skills.
Headquarters : Gurgaon, Haryana
Year founded : 2015
Work Location : Gurugram
Job Description –
Job Role - Software Developer Frontend
Key Capabilities
Responsibilities
- Developing new user-facing features using React.js
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- Knowledge of isomorphic React is a plus
If you think you are one of them then please reply with your interest and we will take your candidature ahead for the next level of evaluation. Below information would be appreciated more:
Current CTC:
Expected CTC:
Notice Period:
Update Resume: please attach
Looking forward to taking you to the next level of technology.










