Java Developer

Position: Full Stack Developer (React.js + Node.js)

Experience: 2–5 Years

Location: Mumbai – Chembur West (Onsite)

Job Summary

We are looking for a Full Stack Developer with strong hands-on experience in React.js and Node.js to build scalable, secure, and high-performance web applications. The ideal candidate should be comfortable owning features end-to-end, developing responsive UI, building REST APIs, integrating databases, and supporting production systems.

Key Responsibilities

• Build responsive UI using React.js, HTML5, CSS3, JavaScript (ES6+)
• Develop scalable backend services and RESTful APIs using Node.js (Express.js / NestJS)
• Work with MongoDB and MySQL (schema design, indexing, query optimization)
• Implement authentication & authorization using JWT , RBAC , Oauth
• Integrate third-party APIs, Webhooks
• Build real-time features using Socket.io / WebSockets
• Ensure performance, scalability, and security (validation, sanitization)
• Implement caching using Redis (if applicable) and optimize API response times
• Support API testing (Postman/Supertest)
• Maintain API documentation using Swagger / OpenAPI
• Debug and resolve defects, handle RCA, and support production troubleshooting with logs/monitoring
• Follow Git-based workflows, participate in code reviews, and collaborate with QA/product teams in Agile delivery

Mandatory Skills

• React.js, Node.js, JavaScript (ES6+)
• MongoDB (must), MySQL
• REST API development & integration
• Socket.io / WebSockets, Webhooks
• HTML5, CSS3
• Git
• Typescript, Express.js / NestJS
• jQuery / AJAX (basic / legacy support)

Good to Have

• Redis, Swagger/OpenAPI
• Docker, CI/CD (GitHub Actions/Jenkins)
• Cloud exposure (AWS/Azure/GCP)

Qualification

BE / BTech / MCA / MSc IT / BSc IT with 2–5 years relevant experience.

CTC: As per industry std.

SleekSky is a fast-growing engineering studio that partners with venture-backed product teams to ship modern, cloud-native software. We’re hiring a Software Engineer to join one of our health-tech clients and help build a scalable, user-centric platform that’s making a real-world impact—without revealing any confidential project details.

What you’ll do

• Build and ship production-ready React features that feel fast, accessible and polished.
• Design and maintain Node.js / Express APIs that are clean, secure and well-documented.
• Leverage AWS services (EC2, Lambda, Elastic Cache / Redis, load balancers, etc.) to deliver reliable, high-performance solutions.
• Automate CI/CD pipelines with GitHub Actions and uphold strong Git workflows.
• Collaborate in an agile, fully remote team that values code reviews, knowledge-sharing and continuous improvement.
• Champion engineering best practices—testing, monitoring, and infrastructure-as-code—while keeping an eye on new tech that can raise the bar.

What you’ll bring

• 2+ years of hands-on experience in full-stack development.
• Proven expertise with React (hooks, component architecture, state management) and modern JavaScript/TypeScript.
• Solid experience building RESTful services in Node.js with Express (or similar).
• Familiarity with AWS fundamentals (EC2, Lambda, load balancing, caching layers).
• Comfortable with Git, GitHub and automated CI/CD pipelines (e.g., GitHub Actions).
• Self-motivated, proactive and enthusiastic about learning new technologies and sharing knowledge with the team.
• Clear, concise communication skills—vital for an all-remote environment.

Nice-to-haves

• Experience with infrastructure-as-code (Terraform, CloudFormation, CDK).
• Exposure to containerisation (Docker, ECS, EKS) or serverless architecture patterns.
• Prior work in health-tech or other regulated domains.

Why SleekSky?

At SleekSky, you’ll join a culture that puts people first—pair programming, regular knowledge-sharing sessions and a genuine passion for building things the right way. Expect autonomy, trust and a runway to grow your craft alongside enthusiastic peers.

Ready to level up with SleekSky? Submit your résumé on your preferred hiring portal and we’ll be in touch right away.

About Lentra:

Lentra is a new-age, domain-native platform built from the ground up, designed and developed to empower financial institutions with tomorrow’s lending ecosystem, today. With its full-stack, fully digital, secured products and solutions, Lentra is the future of smart, seamless, secure digital lending. 

Our solutions cover the Indian lending stack effectively for digital origination by providing capabilities like eKYC, vKYC, eSign, eNACH, etc., besides MultiBureau(R), a comprehensive BRE for faster decisioning and configurable onboarding workflows. Reliability and minimal TATs are the key takeaways from Lentra’s offerings. 

Our Marquee Clients including the topmost private banks in India are now future ready and encashing business opportunities. Lentra's zero risk instant lending solution will empower the FIs to leapfrog into the future.

About the Role:

Lentra AI Pvt. Ltd looking for a Senior Software Engineer to contribute to the software development life cycle, from design and development to testing, release and maintenance. Software Developer responsibilities include building web application modules and testing features before release. If you have hands-on experience developing software with agile methodologies and are ready to lead our junior developers, we'd like to meet you. Ultimately, you will create, enhance, deploy and maintain functional, secure and high-quality applications

Responsibilities:

The candidate has to perform the below responsibilities:

• Active contribution in designing, developing, testing, deploying and maintaining software
• Collaborate with the team to develop web services, mobile and web applications
• Write well designed, efficient, secure and performant code
• Follow best practices in design and testing
• Review, test and debug team members code
• Actively contribute in writing and updating documents

Candidate requirements:

• Candidates should have a minimum of 5 year of experience in web based development using these technologies:
• Core Java, SpringMVC, Node.js, ORM
• Working knowledge of relational database and noSQL databases, Caching technologies
• RESTful, SOAP, JSON
• Angular, HTML5, CSS
• Proficient understanding of code versioning tools, such as Git
• Knowledge of Agile Scrum development Methodologies
• Integrate applications with network systems, servers, and databases
• Troubleshoot problems with application development and use
• Excellent conceptual, and critical thinking capabilities
• Self-directed and self-motivated with the ability to take charge or play a supporting role
• Strong understanding of product development
• Clear written and verbal communications skills (English), including presentation

Location & commitments:

• This is a Permanent Opportunity.
• Job Location is Pune

We are looking for a highly skilled computer programmer who is comfortable with both front and back end programming. Full stack developer is responsible for developing and designing front end web architecture, ensuring the responsiveness of applications, and working alongside graphic designers for web design features, among other duties.

Full stack developers will be required to see out a project from conception to final product, requiring good organizational skills and attention to detail.

• Developing front end website architecture.
• Designing user interactions on web pages.
• Developing back-end website applications.
• Creating servers and databases for functionality.
• Ensuring cross-platform optimization for mobile phones.
• Ensuring responsiveness of applications.
• Working alongside graphic designers for web design features.
• Seeing through a project from conception to finished product.
• Designing and developing APIs.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

Required Experience and Skills:

• Hands-on experience in ReactJS 6.x+, HTML5, CSS, Bootstrap, Node js
• 1+ years of experience in cross-browser compatible responsive web application development using React.
• Good knowledge about Reactive programming using RxJS and Redux.
• Knowledge and use of Restful web services, Gulp / Grunt.
• Experience working with debugging/testing tools like Firebug Lite, Chrome or Safari web inspectors.
• Version Control – GIT
• Servers / Application frameworks – Apache / Nginx / ExpressJS
• Selecting and deploying appropriate CI/CD tools
• Strive for continuous improvement and build continuous integration, continuous development, and constant deployment pipeline (CI/CD Pipeline)

Responsibilities:

• Ability to translate Wireframes and PSD to high quality designs and functional web apps using HTML5, ReactJS, Node.js, and Mongo
• Develop interactive, user-friendly applications using the ReactJS
• Binding of UI elements to JavaScript object models
• Creating RESTful services with Node.js
• Architect scalable web architectures
• Developing for Back-end Web Applications using NodeJS and Express
• Creating servers and databases for functionality
• API design, creation and integrations
• Staying abreast of developments in web applications, app development and programming languages
• Effective communication with different stakeholders.

Job Description:

1. At least 3+ years’ experience into web front end/full stack development

1. Proficient in Object Oriented JavaScript programming and working with JS frameworks on both client and server-side

1. In depth knowledge and working experience in full stack development, for example in Node JS and Mongo DB based implementations as a MEAN stack dev

1. Experience implementing applications using Sails.JS, Angular or ExpressJS frameworks

1. Have hands on knowledge in database technologies, preferable NoSQL databases, such as, MongoDB, Cassandra, etc.

1. Experience with design patterns and building applications from scratch is a plus
2. Thorough understanding and exposure to API integrations, especially RESTful-based web services in JSON
3. Continuous integration (Jenkins/Hudson) and version control (bitbucket, Git etc).