React Developer (6-8 Years) (Mumbai)

Job Title:

Senior Full Stack Developer / Technical Lead – .NET & React

Experience:

10+ Years

Location: Chennai – T.Nagar / WFO

Job Summary:

We are looking for a highly experienced Senior Full Stack Developer / Technical Lead with strong expertise in .NET technologies and React. The ideal candidate should be comfortable handling multiple projects simultaneously, possess excellent communication skills, and be capable of leading and mentoring a team while delivering scalable, high-quality solutions.

Key Responsibilities:

·       Design, develop, and maintain scalable web applications using .NET (C#, ASP.NET Core, Web API) and React

·       Lead end-to-end project execution across multiple parallel projects

·       Handle project switching efficiently with minimal ramp-up time

·       Participate in architecture, design, and technical decision-making

·       Manage, mentor, and guide a team of developers

·       Conduct code reviews, ensure best practices, and maintain coding standards

·       Collaborate with Product Owners, QA, UI/UX, and Stakeholders

·       Ensure performance optimization, security, and application stability

·       Take ownership of delivery timelines and technical quality

·       Support production issues and provide root cause analysis

Required Technical Skills:

·       Strong hands-on experience in:

o  C#, ASP.NET, ASP.NET Core, Web API

o  React.js, Redux / Context API

o  HTML, CSS, JavaScript, TypeScript

·       Experience with RESTful APIs, Microservices (preferred)

·       Database expertise: SQL Server (mandatory), NoSQL (added advantage)

·       Experience with Entity Framework / Dapper

·       Familiarity with Azure / AWS (preferred)

·       Knowledge of CI/CD pipelines, Git, DevOps practices

·       Understanding of Agile / Scrum methodologies

Leadership & Soft Skills:

·       Excellent verbal and written communication skills

·       Proven experience in team handling and mentoring

·       Strong problem-solving and decision-making abilities

·       Ability to manage multiple stakeholders and priorities

·       Ownership mindset and accountability-driven approach

Nice to Have:

·       Experience working in product-based or fast-paced service environments

·       Exposure to high-availability and scalable systems

·       Client-facing experience

DocNexus is revolutionizing the global medical affairs & commercial ecosystem with search. We provide a next-generation data platform that simplifies searching through millions of insights, publications, clinical trials, payments, and social media data within seconds to identify healthcare professionals (HCPs), products, manufacturers, and healthcare systems. Leveraging AI-powered Knowledge Graphs, DocNexus assists life science organizations in finding the right key opinion leaders (KOL/DOLs) who play a crucial role in developing and bringing life-saving pharmaceutical products and medical devices to market. Backed by industry leaders such as Techstars, JP Morgan, Mass Challenge, and recognized as one of the Top 200 Most Innovative Startups by TechCrunch Disrupt, we are committed to transforming healthcare insights. We are seeking a skilled and passionate DevOps Engineer to join our dynamic team and contribute to the efficient development, deployment, and maintenance of our platform.

We are looking for a visionary Sr. Full Stack Engineering Lead who is passionate about building and leading our technology department. The ideal candidate will have a solid technical background and experience in leading a team to drive innovation and growth. As Engineering Lead, you will oversee the development and dissemination of technology for external customers, vendors, and other clients to help improve and increase business.

Leadership and Strategy:

• Lead the engineering team and make strategic decisions regarding the technology stack, project management, and resource allocation.
• Establish the company’s technical vision and lead all aspects of technological development.

Development:

• Develop and maintain the front-end and back-end of web applications.
• Ensure the performance, quality, and responsiveness of applications.
• Collaborate with a team to define, design, and ship new features.

Maintenance and Optimization:

• Maintain code integrity and organization.
• Identify and correct bottlenecks and fix bugs.
• Continually work on optimizing the performance of different applications.

Security: Ensure the security of the web applications by integrating security best practices.

• Regularly update the system to protect against vulnerabilities.

Innovation:

• Research and implement new technologies and frameworks that can improve the performance and user experience of the platform.
• Stay informed on emerging technologies and trends that can potentially impact the company's products and services.

Collaboration and Communication:

• Work closely with other departments to understand their needs and translate them into technical solutions.
• Communicate technology strategy to partners, management, investors, and employees.

Project Management:

• Oversee and support project planning, deadlines, and progress.
• Ensure that the technology standards and best practices are maintained across the organization.

Mentoring and Team Building:

• Foster a culture of innovation and excellence within the technology team.
• Mentor and guide the professional and technical development of team members.

Front-End Development:

• HTML/CSS: For structuring and styling the web pages.
• JavaScript/TypeScript: Core scripting language, along with frameworks like Angular, React, or Vue.js for dynamic and responsive user interfaces.

Back-End Development:

• Python: Using frameworks like Django or Flask for server-side logic.
• Node.js: JavaScript runtime environment for building scalable network applications.
• Ruby on Rails: A server-side web application framework written in Ruby.

Database Management:

• SQL Databases: MySQL, PostgreSQL for structured data storage.
• NoSQL Databases: MongoDB, Cassandra for unstructured data or specific use cases.

Server Management:

• Nginx or Apache: For server and reverse proxy functionalities.
• Docker: For containerizing applications and ensuring consistency across multiple development and release cycles.
• Kubernetes: For automating deployment, scaling, and operations of application containers.

DevOps and Continuous Integration/Continuous Deployment (CI/CD):

• Git: For version control.
• Jenkins, Travis CI, or CircleCI: For continuous integration and deployment.
• Ansible, Chef, or Puppet: For configuration management.

Cloud Services:

• AWS: For various cloud services like computing, database storage, content delivery, etc.
• Serverless Frameworks: Such as AWS Lambda or Google Cloud Functions for running code without provisioning or managing servers.

Security:

• OAuth, JWT: For secure authentication mechanisms.
• SSL/TLS: For secure data transmission.
• Various Encryption Techniques: To safeguard sensitive data.

Performance Monitoring and Testing:

• Selenium, Jest, or Mocha: For automated testing.
• New Relic or Datadog: For performance monitoring.

Data Science and Analytics:

• Python Libraries: NumPy, Pandas, or SciPy for data manipulation and analysis.
• Machine Learning Frameworks: TensorFlow, PyTorch for implementing machine learning models.

Other Technologies:

• GraphQL: For querying and manipulating data efficiently.
• WebSockets: For real-time bi-directional communication between web clients and servers.

About Intro

Intro is a dating app where LGBTQ South Asians find love. Built by Queer Desis in New York for the 100 million queer South Asians around the globe who deserve a space of their own. Our mission: help 1 million Queer Desis find love by the end of 2026. We’re creating a safer, more intentional, and community-driven dating experience — one that celebrates identity, culture, and connection.

The Role

We’re looking for a Founding Full-Stack Engineer who thrives in 0→1 environments. You’ll take ownership of architecture, design, and execution across backend, web, and mobile (iOS/Android) — helping shape both the product and the culture of the company.

You’ll be joining at the earliest stage — working directly with the founding team on everything from feature development to infrastructure decisions and product strategy.

Responsibilities

• Architect and build scalable backend systems (APIs, data models, authentication, messaging, matching).
• Lead development across web and mobile clients (React, React Native, Swift/Kotlin).
• Collaborate on product design and iterate quickly on user feedback.
• Set up CI/CD, testing, and monitoring pipelines.
• Help define the tech culture, best practices, and early engineering team standards.
• Contribute to early hiring and mentorship as we grow.

You Might Be a Great Fit If You

• Care deeply about building for LGBTQ and South Asian communities.
• Are motivated by impact and ownership, not just code.
• Thrive in ambiguity and love solving real user problems fast.
• Want to help define the technical and cultural DNA of a mission-driven company.

Interview Process

1. AI Screen – Initial automated technical and culture-fit assessment.
2. Web Challenge – Build a small feature for the web app to demonstrate frontend and full-stack skills.
3. iOS Challenge – Build a small feature for the iOS app to showcase mobile development and design sense.
4. Android Challenge – Build a small feature for the Android app to highlight cross-platform depth.
5. Founder Chat – Meet with the Founder to discuss vision, values, and long-term fit.

What We Offer

• Competitive salary.
• Full-time (40 hours/week) with flexible hours.
• Opportunity to shape a product with global cultural impact.
• Work directly with the founding team building something that truly matters.

 We are looking for skilled and motivated Software Engineers to join our growing team and work on cutting-edge projects with leading Japanese company in Japan. This role involves full-cycle system and application development across various domains including finance, healthcare, public systems, and web technologies. Candidates will be engaged in both frontend and backend development, database management, testing and end-to-end system integration from requirement gathering and analysis to deployment and maintenance.

• +2 years experience working as a react.js developer.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Knowledge of REACT tools including React.js, Redux, Material UI.
• Experience with user interface design & user experience design
• Knowledge of performance testing frameworks including Mocha and Jest.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills.
• Developing applications in React including component design and state management for specific use cases
• Experience working with at least one SQL and NoSQL Database (MongoDB, SQL Server, Snowflake, Postgres preferred)
• Basic experience with AWS platform

ROLE: Full Stack Developer

About the company:

CogniTensor is an analytical software company that brings data to the heart of decision-making. CogniTensor leverages its product, DeepOptics - an integrated platform  to implement 3A (Automation, Analytics and AI) at scale. 

Cognitensor has customers ranging in Finance, Energy, Commodity, Retail & Manufacturing. More details can be found on our website: https://www.cognitensor.com/

Our strategic investors include Shell and CIIE.CO (IIM-A/Accenture).

Qualification & Experience:

• BE/B.Tech Degree in Computer Programming, Computer Science, or a related field.
• +2 years experience as a Software Developer.
• Hands on experience in developing finance applications is must

Roles & Responsibilities:

We are looking for a Full Stack Developer to produce scalable software solutions. You’ll be part of a cross-functional team that’s responsible for the full software development life cycle, from conception to deployment. 

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 should also be a team player with a knack for visual design and utility. Along with familiar with Agile methodologies and testing skills

• Work with development teams and product managers to ideate software solutions
• Design client-side and server-side architecture
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Write technical documentation
• Excellent communication and teamwork skills

Technical Skills:

Must Have

• React JS
• Git / Bitbucket, 
• Express JS, Python, HTML, CSS, Node JS
• CI/CD like CircleCI
• Postgres or any DB knowledge
• Familiarity with AWS  or Azure or both 

Good to Have

• Docker
• Redux
• Android development
• React Native
• Electron
• GraphQL
• Jira

What’s in for you:

● An opportunity to lead a business segment

● Extensive liaising with customers and partners

● A rewarding career progression

Preferred Location:

Delhi NCR

• Develop new user-facing features
• Build reusable code and libraries for future use
• Ensure the technical feasibility of UI/UX designs
• Optimize applications for maximum speed and scalability
• Assure that all user input is validated before submitting to back-end services
• Define APIs for front-end and back-end
• Consume 3rd party APIs
• Collaborate with other team members and stakeholders

• Strong understanding of JavaScript, its quirks, and workarounds
• Basic understanding of web markup, including HTML5 and CSS3
• Good understanding of advanced JavaScript libraries and frameworks - Angular, RxJS, Internationalization
• Good understanding of asynchronous request handling, partial page updates and reactive components
• Proficient understanding of cross-browser compatibility issues and ways to work around such issues
• Familiarity with front-end build tools
• Proficient understanding of Git
• Good understanding of browser rendering behavior and performance
• Basic understanding of HTTP requests and proficiency in creating REST APIs using Swagger
• Strong understanding of relational databases and its concepts - MySQL
• Ability to write database queries and transactions using sequalize ORM
• We would prefer it the candidate has an experience of min 1 year but a maximum of 3 years with all above mentioned technologies, libraries and frameworks

• Collaborate with internal teams and the Solution Architect to discuss software design and architecture and best practices.
• Learn & work on POC's of trending technology along with the Solution Architect

• Translate application storyboards and use cases into functional applications
• Ensures the code follows latest coding practices and industry standards
• Contribute development activities into various projects
• Ensure the best possible performance, quality, and responsiveness of applications
• Should be able to identify, categorize, parse out, articulate and fix problems that occur in applications
• Should understand concept of iterative development and leverage DevOps tools for CI & CD
• Form strong working relationships with your peers and across the team
• Mentoring and educating less experienced team members in related technologies using methods such as informal training, pair programming etc
• Project Participation

• Early adoption of trending technologies
• Proactive communication/soft skills

• Deep knowledge of OOPS, and RESTful API services.
• Experience using well-known JavaScript frameworks and libraries, such as React / Angular / Vue etc.
• Deep expertise in one or more of the following technologies - PHP, NodeJS, .NET
• Knowledge of DevOps (Containerization / Jenkins Pipeline, etc.)
• Ability to write and high quality and secure code and understand performance issues
• Experience with database systems, with knowledge of SQL and NoSQL stores (e.g., MySQL, Oracle / MongoDB, SQL Server, etc.)
• Experience on cloud related technologies (AWS / Azure) could be add-on.
• Proficient in multiple stacks of technologies / systems / tools and focus on building depth and breadth of skills.
• Demonstrate the ability to build a work plan or parts of a work plan, as applicable for role
• Strong understanding of Agile methodologies.

• Development - .NET Core | PHP | HTML5/CSS | Angular | React | VueJS
• DevOps - GIT, Jenkins
• Cloud – AWS | Azure
• Database – Oracle | Mongo DB | MSSQL | MySQL | PostGreSQL

• Team Player
• Strong communication skills with ability to communicate complex technical concepts and align organization on decisions
• Ability to communicate well in English
• Sound problem-solving skills with the ability to quickly process complex information and present it clearly and simply
• Passionate about technology and excited about the impact of emerging/disruptive technologies
• Open to learning new ideas outside scope or knowledge skillset
• Creating a positive environment within the team
• Strong team player and be a technical lead for the team.
• Challenge the status quo

At Cypherock, We are disrupting the current financial system by increasing the adoption of Blockchain-based digital assets through better key management solutions. We build "Worlds' first products" from India, work at the intersection of Blockchain, Security, Embedded Hardware and Cryptography, and have worked with companies like Google, Blockgeeks, Samsung, Lockheed Martin, Apollo Munich, Bank of America amongst others.

As the primary person responsible for everything Blockchain in the company, we think it will be a great fit if -

1. You love everything Crypto and are passionate to create the World's safest Crypto wallet.
2. You have MERN stack & DevOps experience on AWS.
3. You have reasonable open-source development experience and have shipped production-ready code.
4. You can commit for at least 6 months and you are ideally in your 4th year of college and willing to join full time after the internship if mutually agreed.

If we decide to work together, we believe you would be a key team member who helps in the mass adoption of Crypto for the first billion users.