11+ UML Jobs in Mumbai | UML Job openings in Mumbai

Job Responsibilities:

- Design and develop high-volume, low-latency applications for mission-critical systems, delivering high-availability and performance.

- Contribute in all phases of the development lifecycle: concept, design, build, deploy, test, release to app stores and support.

- Diagnose performance issues, fix bugs (including crashes and ANRs) to increase the functionality of the application.

- Write well designed, testable, efficient code.

- Ensure designs are in compliance with specifications

- Prepare and produce releases of software components

- Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review

Desired Profile :

B.Sc. (CS or IT) + MCA/ BCA + MCA/ B.Tech. /B.E. (CS or IT) .

Experience required- 1 - 2 years

- Subject Proficient in Java/Kotlin programming

- Knowledge and experience in Flutter Framework and DART programming

- Hands on experience in using RESTful APIs

- Hands on experience in designing and developing micro-services architecture and containers

- Object oriented analysis, UML and design using common design patterns.

- Hands on experience in development IDE Android Studio, Android SDK, Firebase Test Lab

- Experience with offline storage, threading, and performance tuning

- Familiarity with push notifications

- Familiarity with IOS integration with Flutter

- Experience using GitHub or similar environment

- Complete understanding of SDLC

- Experience with Agile development

- Experience with Material Design and Android UI design principles, patterns and best practices

- Good knowledge of adding third-party libraries for Eg. Twilio

- Ability to understand business requirements and translate them into technical requirements

CometChat Overview

CometChat is a full-stack conversational platform built to unify every layer of interaction - bringing together real-time conversations (chat, messaging, voice, and video), AI Agents, moderation, notifications, and analytics in one modular, developer-first solution.

We were also recognized on Forbes' 2026 America's Top 500 Startup Employers List - a reflection of the team and culture we've been deliberate about building.

We believe the interface of the future is conversation - not clicks. Every app will soon have an AI layer that's as native as text messaging today. That's why we're building the infrastructure for the world's AI-powered conversations - from human-to-human, to human-to-agent, to multi-party collaboration with AI in the mix.

From AI onboarding assistants that get users productive in minutes, to copilots that perform complex workflows in-app, to intelligent moderators that protect and guide communities in real time - our AI Agent platform makes it all possible.

With CometChat's ready-to-use UI kits, powerful SDKs, and our Full Stack AI Agent Platform, product teams across startups and enterprises can launch safe, scalable, and smart in-app interactions faster than ever.

Why Join Us Now

We're at the tipping point where AI becomes a native part of every conversation. At CometChat, you'll help shape a future where users can talk to their apps as naturally as to a friend - where agents think, reason, act, and collaborate with humans in real time.

You won't just be joining a product team - you'll be building the standard for AI interaction layers: agent-aware UI, intelligent guardrails, rich actions libraries, and multi-party collaboration between people and AI.

If you want to help define how the next billion users will communicate - and push the boundaries of what's possible in real-time, AI-powered engagement - we'd love to work with you.

What we mean by AI-native

AI-native here means you build with agents by default. We expect 100% of the code to be generated via agentic tools (Cursor, Claude Code, and similar), while you own everything that actually matters: problem framing, architecture, tradeoffs, review quality, tests, performance, and security. This is not "vibe coding." The code is generated. The thinking is yours. You should be great at steering agents, validating output, catching subtle issues early, and debugging code you did not manually write.

Why AI-native

Software development is changing permanently, and we are leaning all the way in. You will work in a team that ships fast with agents, where your leverage comes from judgment and systems thinking rather than typing speed. You will get access to whatever AI tools you need (Cursor, Claude Code, or anything else that makes you effective), and the freedom to use them aggressively. If you want to operate at the edge of how modern engineering gets done and level up your output, this role is built for that.

Join us to build where AI meets human connection.

Position Overview & Priorities

We are looking for versatile and experienced technical additions to our development team. The position offers an extensive amount of ownership and influence over our development process as we scale the team. We’re looking for people who enjoy solving meaningful problems and love seeing the things they build in the hands of real users.

Primary responsibility would be:

• Designing and building applications/SDK for the iOS platform
• Ensuring the performance, quality, and responsiveness of applications
• Collaborating with a team to define, design, and ship new features
• Defining correct architecture and following the right design principles.
• Helping maintain code quality, organization, and automatization

Work Location

Chembur, Mumbai

Prioritized Experiences and Capabilities

• Minimum 2-5 years of experience in iOS app development
• Leverage AI-native development workflows, including agentic IDEs and coding assistants (e.g., Cursor, Claude Code), to accelerate delivery while maintaining code quality, security, and engineering standards.
• Proficiency with Objective-C and Swift.
• Experience in iOS frameworks such as Core Data, Core Animation, etc.
• Experience with offline storage, threading, and performance tuning
• Familiarity with RESTful APIs to connect iOS applications to back-end services
• Knowledge of other web technologies and UI/UX standards
• Understanding of Apple’s design principles and interface guidelines
• Knowledge of low-level C-based libraries is preferred
• Familiarity with cloud message APIs and push notifications
• Knack for benchmarking and optimization
• Proficient understanding of code versioning tools
• Familiarity with continuous integration

iOS Developer

Hiring for the position of iOS Developer responsible for developing app from scratch.

Role

●        Translate design and wireframes into code

●        Design, build, and maintain high performance, reusable, and reliable code

●        Identify solutions through research and collaboration that resolves the root of problems as they arise

●        Unit testing code

●        Experience with cloud message APIs and usage of push notifications

Requirement

∙  2+ years’ strong development experience in iOS

∙  Experience using RESTful web services within mobile applications

∙ Proficient with Swift and Cocoa Touch

∙ Knowledge of iOS UI/UX standards

∙ Understanding of Apple’s design principles and interface guidelines

∙ Experience with code versioning control, such as bitbucket/git

Education: Engineering

Responsibilities:

● Design and build advanced applications for the Android platform

● Collaborate with cross-team (developers, designers, product owners, QA) to define,

design, and ship new features.

● Prepare test plans, and test cases and execute/automate them.

● Write and review unit-test code for robustness, including edge cases, usability, and

general reliability

● Problem solve and determine out-of-the-box solutions for complex technical

requirements

● Work with fellow programmers, as well as the rest of the production team, as a lead

programmer and manager.

● Must have very strong problem-solving and analytical skills.

● Application of experience and knowledge to optimise game engine deployment for

virtual reality VR in terms of memory, frame rate and performance.

● Work with emerging technologies to create new tools and systems for interactive

real-time production.

● Ensure compliance with ride requirements, including performance benchmarks and

integration with third-party ride control systems.

● Produce clean, well-documented code and maintain internal engine builds, using

Perforce and other tools to distribute builds to the team.

● End-to-End mobile development life cycle from planning to publishing

Requirements:

● B.Tech/B.E degree in Computer Science, Engineering or a related subject

● Proven software development experience and Android skills development

● Proven working experience in Android app development and have published at least

one original Android app

● Experience with Android SDK

● Experience working with remote data via REST and JSON

● Experience with third-party libraries and APIs

● Working knowledge of the general mobile landscape, architectures, trends, and

emerging technologies

● Experienced in handling both legacy code and greenfield development and can make

technical recommendations based on the needs of the project

● Solid understanding of the full mobile development life cycle.

● Expert-level understanding of object-oriented programming, threading/concurrency,

unit testing, and modern architectural design

● Excellent source control discipline and are comfortable using git flow

● Experience in 3D engine development experience within the games industry is a plus

● Hands-on with Jetpack compose is a plus.

● Scrum, agile process and adherence

● Good project management skills are a plus

● Strong expertise in Kotlin and Java

● Knowledge of Swift and Fuller is a plus

Location:- Andheri East (Marol Maroshi Road, Mumbai)

Employment Type:- Full Time (Starts at 12 noon daily)

Company size: 35 employees + several third parties for various functions

Type: Privately Held

USA: 32 Mallard Cove, Barrington, RI 02806, USA

Mumbai: 3th Floor, 369, Sarla Park, Above Bank of Baroda, Marol Maroshi Road, Opp Seven Hill Hospital, Andheri (E), Mumbai - 400059

Office is 10 mins from Marol Metro Station

Note: Please only apply if you have mobile app development experience.

Must have skills:

iOS

• Good Knowledge of Apache Cordova.
• Strong OO design and programming skills in Objective-C.
• Familiar with iOS SDK (UIKit, Cocoa Touch, Core Data, Core Location, etc).
• Familiar with xcode.

Android

• Strong OO design and programming skills in Java (J2EE J2ME).
• Familiar with the Android SDK.
• Knowledge of SQLite, MySQL or similar database management system.
• Familiar with Developer IDE Android Studio.

Common

• Understanding of other compiled languages
• Experience on web service integration (SOAP, REST, JSON, XML)
• Experience of development using web technologies
• Good understanding of OO programming and design patterns
• Good understanding of HTML5, JavaScript, jQuery, Ajax and PHP
• Experience building web and native apps
• Experience using social media APIs
• Ads integration using a 3rd party ad server (DART)
• Using version control (e.g. SVN)
• Excellent debugging and optimisation skills

Good to have skills:

• LAMP development experience
• PHP frameworks (e.g. Zend)
• PHP template engines (e.g. Smarty)
• Creative design skills
• Working with a content management system
• Working in a media publishing environment

Role: Project Manager

Department: Marketing - Software

Employment Type: Full-Time, Permanent

Role Category: Software Development

Rejolut is one of the award winning fastest growing emerging tech company which is working on leading technology like Blockchian, ML & AI, Complex mobile & web apps, IoT etc.

The ideal candidate will be responsible for developing highly scalable and secure code.

Responsibilities:-
-Able to take the Extreme Ownership of modules/product/projects
-Able to learn & implement new technology/framework/library at God Speed
-Able to come with optimal solution for the business problem
-Can handle calls with the client & customer to know their feedback
-Writing clean code & able to dig into other's code or open source code
-Build pixel-perfect, buttery smooth UIs across both mobile platforms.

-Leverage native APIs for deep integrations with both platforms.

-Diagnose and fix bugs and performance bottlenecks for performance that feels native.
-Maintain code and write automated tests to ensure the product is of the highest quality.
-Transition existing native apps to Flutter

Desired Candidate Profile:-

-Strong knowledge & experience in Dart is mandatory.
-Strong attention to detail in UX & interactions.
-Strong experience with Flex CSS styling.
-Strong experience in SQLfLite & Firebase messaging is required.
-Experience in releasing Android and iOS App store

Culture

- Fast-paced, intellectually stimulating, steep learning, and growth

- Close-knit, hardworking, supportive colleagues

- Challenging work

- Flat organization with no hierarchy

- If you like problem solving, and love latest technology, there are very few better places

How we are different 
 -We are young and dynamic team who are obsessed with solving business problem at scale -We are a technology agnostic company who focus more on finding the optimal solution to business problem rather than technology

 Why to join us
 -We provide huge learning curve. Spending 1.5-2 years with us will put you 3 years ahead in the career
-We work only on cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, ELM
-There are two technology Co-founder in the company ho are pretty much hands-on and have earlier bult the Consumer application which is downloaded millions of time and are in leadership position in copanies like Samsung, Purplle, Loylty Rewardz
-Get mentored by the best in the industry
-Flexible working hours
-Perks best in the industry

• Apply knowledge of Javascript (ES6) including all the latest features
• Usage of third party libraries for Maps, UI scaling, Styles, Secure storage, Permissions, Navigation, Splash screen, Network. Analytics. Push notifications, Localization, Calendar, etc.
• Build and run apps using Xcode, and Android Studio
• Persistence support using frameworks like Realm
• Comprehend performance issues and solve them
• Knowledge of Git (including merging, branching and resolving merge conflicts)

• Ability to create flexbox driven UI layout
• Configuring ESLint for JS code linting
• Being aware of alternate state management mechanisms like MobX
• Is proficient in either iOS or Android programming too.

• Knowledge of all aspects of React framework
• Components, containers, JSX specification of component UI layout, Component lifecycle
• Props and State mechanism used for data flow
• Various kinds of views (text, button, scroll view, flat list, etc.)
• Navigation
• RN animations and gesture system fundamentals
• Redux state management library
• React Router usage
• JSON/XML parsing