
Job Title: Software Development Engineer – III (SDE-III)
Location: Sector 55, Gurugram (Onsite)
Work Timings: Regular day shift, 5 days working
About Master-O
Master-O is a next-generation sales enablement and microskill learning platform designed to empower frontline sales teams through gamification, AI-driven coaching, and just-in-time learning. We work closely with large enterprises to improve sales readiness, productivity, and on-ground performance at scale.
As we continue to build intelligent, scalable, and enterprise-ready products, we are looking for a seasoned SDE-III who can take ownership of complex modules, mentor engineers, and contribute to architectural decisions.
Role Overview
As an SDE-III at Master-O, you will play a critical role in designing, building, and scaling core product features used by large enterprises with high user volumes. You will work closely with Product, Design, and Customer Success teams to deliver robust, high-performance solutions while ensuring best engineering practices.
This is a hands-on role requiring strong technical depth, system thinking, and the ability to work in a fast-paced B2B SaaS environment.
Required Skills & Experience
- 4–5 years of full-time professional experience in software development
- Strong hands-on experience with:
- React.js
- Node.js & Express.js
- JavaScript
- MySQL
- AWS
- Prior experience working in B2B SaaS companies (preferred)
- Experience handling enterprise-level applications with high concurrent users
- Solid understanding of REST APIs, authentication, authorization, and backend architecture
- Strong problem-solving skills and ability to write clean, maintainable, and testable code
- Comfortable working in an onsite, collaborative team environment
Good to Have
- Experience working with or integrating LLMs, AI assistants, or Agentic AI systems
- Experience with cloud platforms and deployment workflows
- Prior experience in EdTech, Sales Enablement, or Enterprise Productivity tools
Why Join Master-O?
- Opportunity to build AI-first, enterprise-grade products from the ground up
- High ownership role with real impact on product direction and architecture
- Work on meaningful problems at the intersection of sales, learning, and AI
- Collaborative culture with fast decision-making and minimal bureaucracy
- Be part of a growing product company shaping the future of sales readiness

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Experience: 5 to 7 Years
Notice Period: Immediate Joiner
Key Responsibilities
- Design, develop, and maintain scalable, high-performance Java applications.
- Work with Core Java and Advanced Java concepts to build reliable backend solutions.
- Develop and deploy applications using Spring Boot framework.
- Design and implement RESTful Microservices with best practices in scalability and performance.
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- Manage code versions effectively using Git/GitHub.
- Ensure code quality by integrating and analyzing with SonarQube.
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Required Skills
- Strong proficiency in Core Java (OOPs, Collections, Multithreading, Exception Handling).
- Hands-on experience in Advanced Java (JDBC, Servlets, JSP, JPA/Hibernate).
- Proven experience with Spring Boot for application development.
- Knowledge and experience in Microservices Architecture.
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- Proficient in Git/GitHub for version control and collaboration.
- Experience with Sonar Qube for code quality and security checks.
- Good understanding of Agile/Scrum methodologies.
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Nice-to-Have
- Experience with CI/CD pipelines (Jenkins, GitHub Actions, or similar).
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Design and develop frontend applications using Angular (v10+).
Build and maintain RESTful APIs using Node.js and Express.js.
Develop and manage MySQL databases including schema design, query optimization, and stored procedures.
Integrate front-end UI with backend services.
Collaborate with product managers, designers, and other developers to deliver high-quality software.
Participate in code reviews, testing, and debugging.
Optimize application performance, scalability, and security.
Write clean, maintainable, and well-documented code.
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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.
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What you’ll bring
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Nice-to-haves
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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.
Responsibilities:
- Take the lead in building tools to increase the productivity of our business and product teams
- Build client facing portal to support the submission and integration of games from external developers
- Collaborate with teams in a range of disciplines
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Basic Qualifications:
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- Strong knowledge of AWS Cloud architecture, services, and DevOps
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- Comfortable understanding and implementing REST APIs, knowledge of AJAX patterns and principles
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- Have a solid knowledge of web debugging tools (Firebug or Chrome Developer Console)
Pluses:
- Bonus points for data warehouse experience (Snowflake, Redshift)
- Experience in game programming and Unity development
- Knowledge of unit testing and test driven development
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Perks:
- Free medical, dental, and vision insurance
- Work from home stipend on each paycheck
- Competitive Salary
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- At least four years experience with:
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- A relevant back-end programming language e.g., C# .NET, ASP.NET MVC, Entity Framework, ADO.NET, .NET Core
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Blue9 Technologies 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.
If you’re also familiar with Agile methodologies, we’d like to meet you.
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- Proven experience as a Full Stack Developer or similar role
- Experience developing desktop and mobile applications
- Familiarity with common stacks (.net & PHP)
- Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
- Knowledge of multiple back-end languages (e.g. C#, Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js)
- Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache), and UI/UX design
- Excellent communication and teamwork skills
- Great attention to detail
- Organizational skills
- An analytical mind
Facilitate business facing workshops with the technical team and develop a technical plan.
Provide detailed specifications for proposed solutions.
Communicate architectural decisions, plans, goals and strategies to project teams.
Providing innovation to the product whilst collaborating with the product teams, business
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Support business and IT strategic planning.
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Analyse current technologies used within the company and determine ways to improve.
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Minimum of 5 years of direct business interaction in designing technical solutions.
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Positive outlook in meeting challenges and working to a high level.
Continuous improvement and innovative mind-set.
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Broad technology experience, awareness of current technology trends and a sound
understanding of contemporary software engineering practices and behaviours.
Excellent presentation skills for communicating both business oriented solutions and
advanced technical concepts.
A degree in Computer Science and/or a business related degree; or equivalent work
experience.
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Spectra: An integrated drone data platform to visualize enterprise worksites and perform AI-powered analytics that helps teams plan better, construct faster, and sustain longer.
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DronePass: Hardware module and integration solution that helps drone manufacturers, OEMs, and system integrators integrate their drones with Digital Sky for Unmanned Traffic Management.
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Build and deploy new tools to streamline the overall process flow as requirements develop
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Explore new technologies and products to see how they can improve our products
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Translate business requirements into technical specifications; communicate and get
stakeholder buy-in; iterate and refine
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Review, prepare and present design/code to colleagues
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Coordinating with the extended development team and cross-functional teams
Skillset
Must have
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Proficiency with JavaScript and Python
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2+ years experience working on web applications (building, maintaining and debugging)
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2+ years experience working with either Django or Flask framework
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2+ years experience working with either VueJS or React framework
-
Experience with databases such as PostgreSQL or MySQL or MongoDB
-
Experience in design and implementation of ReST APIs
-
Proficiency with Git version control
Good to have
-
Knowledge of TypeScript
-
Knowledge of GraphQL and PostGIS
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Knowledge in test-driven development: unit tests and integration tests
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Experience with deployment tools such as Docker and CI/CD
-
Experience with cloud services such as AWS or GCP
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Experience with map-related libraries such as GDAL, Geopandas, MapBox, Leaflet etc.
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Responsibilities
- Design and build scalable, mobile-first web applications
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- Work on bug fixing and improving application performance
- Continuously discover, evaluate, and implement new technologies to maximize development efficiency
Skills
- BS/MS degree in Computer Science, Engineering or a related subject.
- 3 to 5 years of industry experience as a Full Stack Developer with focus in React.js and Node.js
- Experience with Express.js and Node.js is a must.
- Experience with third-party libraries and APIs is required.
- Experience using Google Firebase is an asset.
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- Understanding and playing a part in the entire cycle of software consulting and delivery (ideation, project conception, UX, code, testing, deployment, and around again).
- Working knowledge of the general web application landscape, architectures, trends, and emerging technologies.
- Solid understanding of the application development life cycle.










