Senior Fullstack Developer

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

Build and maintain products. Build products and features, through inception, design, implementation and launch, working closely with multiple disciplines across the company. You will spend the majority of your time working on critical projects which require focus on integrations, scalability, and performance. You will also be the first line of defense in ensuring that the product features are achievable and have a clear purpose, trimming off unnecessary detailing, especially in the earliest stages. Align across teams and stakeholders. Play a key role in ensuring that objectives and expectations are aligned across multiple concurrent products. You are expected to break down features within each project and prioritize tasks based on the expertise of the team, keeping redundancy in mind. 

Maintain a high bar for code quality and future proofing. Implement processes for checking in code that maintains a high bar of code quality. You are expected to optimize for a solution that affords the best user experience in a reasonable amount of time while ensuring to allow for adequate security, ability to scale in the future etc. 

Responsibilities

● Design, build and maintain scalable, secure web services and distributed systems

● Design and develop robust solutions for client onboarding, portfolio analytics, tokenized security issuance, authentication, and security

● Build solutions to integrate with APIs of external solutions providers including crypto custodians, exchanges, fund admins etc.

● Architecting and building frontend features in React.js

● Ensuring a highly performant and responsive UI

● Help maintain existing codebase, infrastructure, test coverage, and documentation

● Communicate requirements effectively within and across teams

● Independently work and lead project initiatives in a fast paced environment

Requirements

● 5+ years of work experience as a Senior Software Engineer or similarly senior member of a fast scaling company, ideally building products from ideation to launch with a strong engineering team. Web3 based experience preferred.

● Have experience in rapid prototyping of features across various products. Demonstrable open source contributions and experience with Git advantageous.

● Professional experience with Python, Javascript, Typescript, or Go

● Must have experience building and/or integrating with RESTful APIs

● Working knowledge of Django, FastAPI, or React.js and Redux

● Working knowledge various frontend frameworks and languages such as HTML, CSS

● Experience monitoring and scaling microservice-oriented systems

● Familiarity with websocket architecture and implementation

● Experience working with cloud-native AWS infrastructure and/or Kubernetes

● Team-building and technical leadership experience

● Being nimble and reacting quickly to changing business conditions

● BTech in Computer Science or a related field (Masters is a plus

Benefits

● Competitive salary, benefits & participation in the firm's ESOP program

● Be part of something exciting. Rare opportunity to come in early and build the next generation of institutional grade financial services.

● International work environment and flat organization. Possibility for relocation and international transfers mid-career

Job Requirements

•   3+ years of experience with custom application development.
•   Must be dedicated, passionate, and hard-working. Attitude is everything.
•   Must be able to work with a team and collaborate. Hard workers and self-starters please apply.
•   We are looking for a creative and efficient problem solver.

Technical Requirements

•   Experience working within Agile development environments.
•   Experience with Node.js, PHP, Laravel, React.js, JavaScript, HTML5, CSS3.
•   Experience with Redux, Redux Saga
•   OAuth and JWT Tokens experience is a plus.
•   Experience with the Next.js and Nest.js framework is a plus.
• Advanced Laravel Experience (Middleware, Collections, Policies, and Service Containers).
•   Experience with unit testing (PHP Unit).
•   Experience with MySQL profiling and query optimization.
•   Solid working experience building RESTful APIs.
•   Active experience integrating custom code with 3rd party web services.
•   Hands-on experience with tools such as Git and Jira.
•   Experience working in the AWS (Amazon Web Services) ecosystem.

 Job Duties

•   Work with a team of developers, BA, PM, QA, etc. to execute strategies and implement solutions to build quality business software applications.

•   Develop front-end and back-end components for large data-driven applications.
•   Review features requests, provide feedback, and develop/maintain features for web applications. 
•   Document your development process and development components. 
•   Work with other developers to complete tasks and share ideas.

Job Title: Java Full Stack Developer

Work Location: Bangalore, Chennai, Mysore

Experience: 5+ Years

Budget: up to 18 Lakhs

Notice Period: Immediate to 30 days

Mandatory Skills: Java, Java Script, HTML, CSS

Job Description:

A Bachelor's degree in computer science, statistics, or Engineering.

· At least 5 years of strong knowledge and experience in developing web applications using J2EE, Multi thread programming, Data structure, Junit and Mockito

· Strong knowledge in Spring Boot, Microservices, LOG4j, Spring security

· Strong Experience in Angular JS responsive frameworks. ReactJS.

· Strong knowledges in JavaScript, TypeScript, jQuery, HTML5, CSS.

· Experience working with tools like Git, Maven, Gradle.

· Demonstrate strong design and programming skills using JSON, Web Services, XML in Unix and Windows environments.

· Experience with Build Automation, Continuous Integration and Test Automation (npm, Gradle, Maven, Jenkins).

· Thorough understanding of Integrated Development Environments like Visual Studio Code, Eclipse and IntelliJ.

· Good understanding of Databases, Frameworks, Design, Algorithms, etc.

· Working knowledge with Oracle, Mongo DB databases.

· Strong agile/scrum development experience

· Experience in Cloud platforms including deploying applications in a containerized platform is preferred.

· Experience in full lifecycle with requirements to development to support.

· Excellent verbal communication skills.

· Good problem-solving skills.

• 5+ years’ experience in customer focused product management in a technical product, end-to-end implementation and deployment within cloud systems.
• Must have experience in SaaS applications.
• Must have knowledge of Angular 8+, Azure, HTML CSS, JQuery, JavaScript ASP.Net, C#, SQL Server 2012/2014+ etc.
• Should have sound knowledge of Object-Oriented (OOPS) concepts.
• Must have experience in end-to-end product ownership and project management.
• Good experience in Relational Database Management Systems, Database design and Normalization.
• Hands-on experience in design, development, and debugging of systems.
• Object-Oriented Design (OOD) to ensure scalability and maintainability.
• Experience managing multiple clients with strong knowledge of Agile/SCRUM processes.
• Hands-on experience in DevOps and Azure functions.

KEY DUTIES AND RESPONSIBILITIES

·         Working on and at times leading the full software development lifecycle of systems

• Solid technical background with understanding and/or hands-on experience in software development, web technologies.
• Works with the product development team on the validation and verification process.
• Coordinate with the sales team to promote the product. 
• Experience of going through a full product lifecycle, integrating internal and external customer feedback into product requirements, managing change requests, driving prioritization and pre- / post-launch execution.
• Define product tasks and resource requirements.
• Analysis of systems, considering reliability, systems risks and code.
• Create technical and feature roadmaps along with release planning, sprint goals, and grooming of both technical and business functions.
• Manage project conflicts, challenges, and dynamic business requirements to meet expected deliverables.
• Experience in maintaining the document of application functionality.
• Excellent understanding of process management, improvement practices, operation services.
• Strong written and verbal communication skills.

Job Summary:

Senior React Native developer will be responsible for developing, designing and maintaining the core framework of mobile applications for our platform. This includes tasks such as creating and implementing new features, troubleshooting and debugging any issues, optimizing the performance of the app, collaborating with cross-functional teams and staying current with the latest advancements in React Native and mobile app development. We are looking for exceptional candidates who have an in-depth understanding of React, JavaScript and TypeScript, can create pixel-perfect UI and are obsessed with creating the best experiences for end users.

Your responsibilities include:

1. Architect and build performant mobile applications on both iOS and Android platforms using React Native.
2. Work with squad leaders and other managers to provide technical consultation and assist in defining the scope and sizing of work.
3. Maintain compliance with standards such as ISO 27001, ISO 13485, and Cyber Essentials that Avegen adheres to.
4. Lead configuration of our platform HealthMachine™ in line with functional specifications and development of platform modules with a focus on quality and performance.
5. Write well-documented, clean Javascript/TypeScript code to build reusable components in the platform.
6. Maintain code, write automated tests and assist DevOps in CI/CD to ensure the product is of the highest quality.
7. Lead by example in best practices for software design and quality. You will stay current with tools and technologies to seek out the best needed for the job.
8. Train team members on software design principles and emerging technologies by taking regular engineering workshops.

Requirements

1. Hands-on experience working in a product company developing consumer-facing mobile apps that are deployed and currently in use in production. He/she must have at least 3 mobile apps live in Apple App Store/Google Play Store.
2. Proven ability to mentor junior engineers to realize a delivery goal.
3. Solid attention to detail, problem-solving and analytical skills & excellent troubleshooting skills.
4. 4+ years’ experience working as a mobile developer in React Native.
5. In-depth understanding of React and its ecosystem with the latest features.
6. Experience in writing modular, reusable custom JavaScript/TypeScript modules that scale well for high-volume applications.
7. Strong familiarity with native development tools such as Xcode and Android Studio.
8. A positive, “can do” attitude who isn’t afraid to lead the complex React Native implementations.
9. Experience in building mobile apps with intensive server communication (REST APIs, GraphQL, WebSockets etc.).
10. Self-starter, able to work in a fast-paced, deadline-driven environment with multiple priorities.
11. Excellent command of version control systems like Git.
12. Working in Agile/SCRUM methodology, understanding of the application life cycle and experience working on project management tools like Atlassian JIRA.
13. Good command of the Unix operating system and understanding of cloud computing platforms like AWS, GCP, Azure etc.
14. Hands-on experience in database technologies including RDBMS and NoSQL and a firm grasp of data models and ER diagrams.
15. Open source contributions and experience developing your own React Native wrappers for native functionality a plus.

About us

404 DM is a fast-growing data-driven creative solutions provider, with a portfolio of brands that include Myntra, Flipkart, and Wildcraft. Our team essentially stands for all things digital with an abundance of creativity. The focus lies in building - right from crafting compelling narratives that capture a brand's essence to the long-lasting relationships that are developed with each and every client, the agency believes that this is the driving force behind the work they do. 404 DM offers a wide variety of services in the digital sphere, including design, technology, media planning, and above all, creative strategizing that helps brands stand out amidst their contemporaries.

We are building this really cool product that will change the way brands do their marketing and acquire customers. We're looking for equally driven and highly skilled people to join us. We'd love to have a conversation with you and see if you and our team are the right fit for each other.

Roles and Responsibilities

• Defines site objectives by analyzing user requirements; envisioning system features and functionality.
• Designs and develops user interfaces to Internet/intranet applications by setting expectations and features priorities throughout the development life cycle; determining design methodologies and toolsets; completing programming using languages and software products; designing and conducting tests.
• Recommends system solutions by comparing advantages and disadvantages of custom development and purchase alternatives.
• Integrates applications by designing database architecture and server scripting; studying and establishing connectivity with network systems, search engines, and information servers.
• Completes applications development by coordinating requirements, schedules, and activities; contributing to team meetings; troubleshooting development and production problems across multiple environments and operating platforms.
• Enhances organization reputation by accepting ownership for accomplishing new and different requests; exploring opportunities to add value to job accomplishments.
• Supports and develops web application developers by providing advice, coaching.
• SADs (Senior application Developer ) maintain the job duties of a supervisor as well as a lower-level application developer These duties can include regular consultations with the Team concerning software, creating new programs, and testing newly installed programs to verify functionality.
• The managerial side of being a leader can include writing reports on team progress and presenting those reports to upper executive committees, per Coding standards. SADs also make executive-level standards decisions for their department, ensure company policies are being followed and counsel employees as needed

Desired Candidate Profile

• Bachelor's or Master's degree in information technology or computer sciences. Combining full - time academics degree with certification in computer languages and software programs could be an added advantage.
• At least 5 to 8 years of experience as a leader with hands-on experience in programming languages such as Javascript, HTML, C++, PHP, Angular, Ajax, Rest Api, Node.Js, JQuery, MySQL, API Oath Integration, Shopify, Open Source app development, Social media Developer tool.

Bluecore is a marketing technology company that’s reimagining how the world’s fastest-growing retail brands transform casual shoppers into lifetime customers. Through our patented retail data model and the recent release of Bluecore Communicate™ and Bluecore Site™, we replace manual processes with an intelligent, AI-driven workflow. We are credited with doubling email revenue and increasing customer retention for more than 400 brands, including Express, Tommy Hilfiger, The North Face, Teleflora, and Bass Pro Shops. We have been recognized as one of the Best Places to Work by Glassdoor and ranked No. 241 on the Inc. 500 List, the most prestigious ranking of the nation’s fastest-growing private companies.

Bluecore’s Integrations Engineering (IE) unit is a software engineering team dedicated to helping Bluecore customers extract maximum value from the Bluecore Retail Data Platform.  As an IE, you will bring your technical know-how to the main connections of the Bluecore engine to our clients - drawing meaningful intelligence from their websites and implementing marketing solutions that map to the customer’s vertical, audience behavior, and product mix.

As an Integrations Engineer, your principal responsibilities will lie in (1) maintaining and writing JavaScript-based integrations that live on client websites, (2) configuring, monitoring, and maintaining the intake and manipulation of client data, and (3) utilizing internal infrastructure, tooling and documentation to solve complex, often-unique, client-specific problems. It is important to be detail-oriented in your work, as we work closely with a multitude of the industry’s top online retailers, all of which have very stringent requirements around the look and feel of their strategic communications.

You Are A Perfect Fit If You Love:

-Solving unique, complex problems: You are someone who can think critically, often on the fly, about nuanced technical problems to devise a scalable, maintainable solution. You enjoy the puzzle and the process of iterating and ideating before implementing a solution, and you are able to break complex problems into simple components for better analysis and digestion.

-Metrics and Data: You are someone who finds yourself consumed by daily, weekly and monthly metrics and loves turning those into best practices. Seriously, your work will be driving executive-level decision-makers at industry-leading brands on best business practices.

-Curiosity and Growth: You are someone who actually believes that diversity in thought and skills makes for a better workplace and a better you.

Responsibilities

Write client-side JavaScript to be run on clients' websites and configure custom recommendation logic using domain-specific tooling.

Develop the best technical solution possible for the toughest challenges that our customers will throw at you.

Ideate, develop, and improve upon internal tooling, procedures, and processes that facilitate the work of the Technical Services team.

Monitor the overall health and uptime of our most critical connections to clients

Requirements

Successful completion of reputable schooling in Computer Science or Coding Bootcamp.

Fluent in JavaScript and familiar with various other web development technologies. 

Ability to take ambiguous workflows and turn them into structured processes.

Nice to have

Exposure to (or interest in learning!) SQL, Python, or Google Cloud Functions.

Familiarity with Marketing, Advertising, eCommerce, or other Emerging Technology (Artificial Intelligence, etc.) platforms.

Ability to grow into a client-facing technical resource as a career progresses in Bluecore