Big Rattle Technologies
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Android Development
KotlinPosition: Android Developer (1- 4 years)
Location: Marol, Andheri East, Mumbai
Company: Big Rattle Technologies Private Limited
Immediate Joiners only.
Summary
We are seeking an experienced and dedicated Android Developer to join our mobile team. You will be responsible for designing, developing, and maintaining high-performance, user-centric Android applications. You will be instrumental in driving the technical implementation of our mobile strategy, ensuring high code quality, and leveraging the latest Android development best practices. You must have delivered at least 3-4 projects.
Required Skills (more the better):
- Kotlin Mastery: Strong proficiency in the Kotlin programming language, including experience with functional programming concepts, null safety, and extension functions.
- Android SDK & IDE: Deep expertise with the Android SDK and Android Studio.
- Architecture Components: Proven experience with key Android Jetpack libraries: Lifecycle, ViewModel, LiveData/StateFlow, Navigation, and Room persistence library.
- Asynchronous Programming: Extensive practical experience with Kotlin Coroutines for efficient background processing.
- Version Control: Expert knowledge of Git for source control management.
- Testing: Experience with automated testing methodologies, including unit testing and UI testing.
- Experience on Android Architecture Components – MVVM Architecture
- Experience with integratingRESTful API
- Strong understanding of object-oriented programming
- Knowledge of Push Notifications & cloud-based messaging
- Understanding of security principles including secrets, encryption, etc
- Bonus Skills (Preferred): Experience with Jetpack Compose, Dependency Injection frameworks (e.g., Hilt/Dagger), and cloud service integration (e.g., Firebase), Local DB e.g., Room, Realm, etc
Responsibilities will include:
- Design & Development: Lead the design and development of advanced, feature-rich applications
- Quality & Performance: Write robust, well-tested code, conduct rigorous unit and integration testing (using JUnit and Espresso/Compose Testing), and continuously optimize app performance, stability, and responsiveness.
- Collaboration: Participate actively in code reviews, technical design discussions, and work closely with Product Managers, UX/UI Designers, and QA teams in an Agile environment.
- Ensure the application is secure and free of vulnerabilities
- Evaluate third party IDEs and tools to build relevant applications.
- Conduct code reviews & peer reviews.
- Establish coding standards.
- Integrate user interface with code.
- Prepare necessary documentation.
- Review updates/patches and make necessary code updates.
- Develop apps for different versions of Android and ensure compatibility with different screen sizes
- Maintenance & Deployment: Manage application releases, debugging, and deployment to the Google Play Store, and maintain the build system using Gradle.
Required Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field.
Why should you join Big Rattle?
Big Rattle Technologies specializes in AI/ ML Products and Solutions as well as Mobile and Web Application Development. Our clients include Fortune 500 companies. Over the past 13 years, we have delivered multiple projects for international and Indian clients from various industries like FMCG, Banking and Finance, Automobiles, Ecommerce, etc. We also specialise in Product Development for our clients.
Big Rattle Technologies Private Limited is ISO 27001:2022 certified and CyberGRX certified.
What We Offer:
- Opportunity to work on diverse projects for Fortune 500 clients.
- Competitive salary and performance-based growth.
- Dynamic, collaborative, and growth-oriented work environment.
- Direct impact on product quality and client satisfaction.
- 5-day hybrid work week.
- Certification reimbursement.
- Healthcare coverage.
How to Apply:
Interested candidates are invited to submit their resume detailing their experience. Please detail out your work experience and the kind of projects you have worked on. Ensure you highlight your contributions and accomplishments to the projects.
Python
Machine Learning (ML)Position: QA Engineer – Machine Learning Systems (5 - 7 years)
Location: Remote (Company in Mumbai)
Company: Big Rattle Technologies Private Limited
Immediate Joiners only.
Summary:
The QA Engineer will own quality assurance across the ML lifecycle—from raw data validation through feature engineering checks, model training/evaluation verification, batch prediction/optimization validation, and end-to-end (E2E) workflow testing. The role is hands-on with Python automation, data profiling, and pipeline test harnesses in Azure ML and Azure DevOps. Success means probably correct data, models, and outputs at production scale and cadence.
Key Responsibilities:
Test Strategy & Governance
- ○ Define an ML-specific Test Strategy covering data quality KPIs, feature consistency
- checks, model acceptance gates (metrics + guardrails), and E2E run acceptance
- (timeliness, completeness, integrity).
- ○ Establish versioned test datasets & golden baselines for repeatable regression of
- features, models, and optimizers.
Data Quality & Transformation
- Validate raw data extracts and landed data lake data: schema/contract checks, null/outlier thresholds, time-window completeness, duplicate detection, site/material coverage.
- Validate transformed/feature datasets: deterministic feature generation, leakage detection, drift vs. historical distributions, feature parity across runs (hash or statistical similarity tests).
- Implement automated data quality checks (e.g., Great Expectations/pytest + Pandas/SQL) executed in CI and AML pipelines.
Model Training & Evaluation
- Verify training inputs (splits, windowing, target leakage prevention) and hyperparameter configs per site/cluster.
- Automate metric verification (e.g., MAPE/MAE/RMSE, uplift vs. last model, stability tests) with acceptance thresholds and champion/challenger logic.
- Validate feature importance stability and sensitivity/elasticity sanity checks (price/volume monotonicity where applicable).
- Gate model registration/promotion in AML based on signed test artifacts and reproducible metrics.
Predictions, Optimization & Guardrails
- Validate batch predictions: result shapes, coverage, latency, and failure handling.
- Test model optimization outputs and enforced guardrails: detect violations and prove idempotent writes to DB.
- Verify API push to third party system (idempotency keys, retry/backoff, delivery receipts).
Pipelines & E2E
- Build pipeline test harnesses for AML pipelines (data-gen nightly, training weekly,
- prediction/optimization) including orchestrated synthetic runs and fault injection
- (missing slice, late competitor data, SB backlog).
- Run E2E tests from raw data store -> ADLS -> AML -> RDBMS -> APIM/Frontend, assert
- freshness SLOs and audit event completeness (Event Hubs -> ADLS immutable).
Automation & Tooling
- Develop Python-based automated tests (pytest) for data checks, model metrics, and API contracts; integrate with Azure DevOps (pipelines, badges, gates).
- Implement data-driven test runners (parameterized by site/material/model-version) and store signed test artifacts alongside models in AML Registry.
- Create synthetic test data generators and golden fixtures to cover edge cases (price gaps, competitor shocks, cold starts).
Reporting & Quality Ops
- Publish weekly test reports and go/no-go recommendations for promotions; maintain a defect taxonomy (data vs. model vs. serving vs. optimization).
- Contribute to SLI/SLO dashboards (prediction timeliness, queue/DLQ, push success, data drift) used for release gates.
Required Skills (hands-on experience in the following):
- Python automation (pytest, pandas, NumPy), SQL (PostgreSQL/Snowflake), and CI/CD (Azure
- DevOps) for fully automated ML QA.
- Strong grasp of ML validation: leakage checks, proper splits, metric selection
- (MAE/MAPE/RMSE), drift detection, sensitivity/elasticity sanity checks.
- Experience testing AML pipelines (pipelines/jobs/components), and message-driven integrations
- (Service Bus/Event Hubs).
- API test skills (FastAPI/OpenAPI, contract tests, Postman/pytest-httpx) + idempotency and retry
- patterns.
- Familiar with feature stores/feature engineering concepts and reproducibility.
- Solid understanding of observability (App Insights/Log Analytics) and auditability requirements.
Required Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field.
- 5–7+ years in QA with 3+ years focused on ML/Data systems (data pipelines + model validation).
- Certification in Azure Data or ML Engineer Associate is a plus.
Why should you join Big Rattle?
Big Rattle Technologies specializes in AI/ ML Products and Solutions as well as Mobile and Web Application Development. Our clients include Fortune 500 companies. Over the past 13 years, we have delivered multiple projects for international and Indian clients from various industries like FMCG, Banking and Finance, Automobiles, Ecommerce, etc. We also specialise in Product Development for our clients.
Big Rattle Technologies Private Limited is ISO 27001:2022 certified and CyberGRX certified.
What We Offer:
- Opportunity to work on diverse projects for Fortune 500 clients.
- Competitive salary and performance-based growth.
- Dynamic, collaborative, and growth-oriented work environment.
- Direct impact on product quality and client satisfaction.
- 5-day hybrid work week.
- Certification reimbursement.
- Healthcare coverage.
How to Apply:
Interested candidates are invited to submit their resume detailing their experience. Please detail out your work experience and the kind of projects you have worked on. Ensure you highlight your contributions and accomplishments to the projects.
The recruiter has not been active on this job recently. You may apply but please expect a delayed response.
Swift
Objective C
iOS App DevelopmentWe are looking for an entry level developer to join our team. You must have delivered at least 2 projects either as a part of self training, internships or industry experience.
Required Skills (more the better):
- Native iOS Application Development with Swift, understanding of Objective C, iOS SDK, Xcode, Cocoa Layer, Media Layer, Core Service Layer, Core OS Layer, iOS Frameworks, iOS Developer Tools, iOS programming, iOS Human Interface
- Hybrid mobile application development using Flutter will be an added advantage
- Deployment/ publish in Apple App Store
- Understanding of design patterns like MVC
Additional Skills:
- Versioning tools such as Git, Bit Bucket, and concepts like branching
- DevOps: Knowledge of operating systems, hosting and deployment on cloud platforms like Amazon Web Services, Google Cloud, Azure etc will be added advantage
Responsibilities will include:
- Developing applications for iPhone and iPad
- Reviewing new releases, SDKs, updates in the mobile space
- Writing clean, well-designed code
- Debugging code and fixing bugs
- Ensuring code quality and security by following industry standards
- Managing code repositories and deploying builds
- Contributing to all phases of the development lifecycle
- Participating in team meetings and client meetings/ calls
- Learning new technologies
Why should I join Big Rattle?
Big Rattle Technologies specializes into development of Mobile and Web applications. Our clients include Fortune 5000 companies. Over the past 9 years, we have delivered multiple projects for clients from various industries like FMCG, Restaurants, Banking and Finance, Automobiles, Ecommerce, Television and Broadcast Agencies.
You will have an opportunity to get end-to-end exposure in software design and development of products, web applications and mobile applications. You will also have opportunities to participate in the decision-making process and take leadership roles as you grow in the organisation.
The company offers benefits like
- Healthcare coverage (including Covid-19 vaccination reimbursement)
- Technical certification fee reimbursements
- Technical training fee reimbursements
- 5-day work week
- Flexible working hours
- Hybrid working
The recruiter has not been active on this job recently. You may apply but please expect a delayed response.
Vue.js
AngularJS (1.x)
Angular (2+)
React.js
JavascriptWe are looking for an experienced developer to join our team. You must have 2 to 4 years of work experience in PHP and should have delivered at least 4 projects.
Required Skills (more the better):
- PHP, Laravel, MySQL/ MariaDB, HTML5, CSS3, JavaScript, AJAX/ Fetch, jQuery, Web services and APIs
- MVC framework, Design Patterns, Authentication, Eloquent, Providers, Middleware, Supervisor, Cron Jobs, Postman etc.
- Experience of entire software development lifecycle
- Project delivery experience and has handled clients directly
- Managed a team of at least 4 developers
- Client Interaction and requirements management
Additional Skills:
- Versioning tools such as Git, Bit Bucket, and concepts like branching
- DevOps: Knowledge of operating systems, hosting and deployment on cloud platforms like Amazon Web Services, Google Cloud, Azure etc will be added advantage
Responsibilities will include:
- Writing clean, well-designed code
- Debugging code and fixing bugs
- Ensuring code quality and security by following industry standards
- Managing code repositories and deploying builds
- Contributing to all phases of the development lifecycle
- Participating in team meetings and client meetings/ calls
- Learning new technologies
Why should I join Big Rattle?
Big Rattle Technologies specializes into development of Mobile and Web applications. Our clients include Fortune 5000 companies. Over the past 9 years, we have delivered multiple projects for clients from various industries like FMCG, Restaurants, Banking and Finance, Automobiles, Ecommerce, Television and Broadcast Agencies.
You will have an opportunity to get end-to-end exposure in software design and development of products, web applications and mobile applications. You will also have opportunities to participate in the decision-making process and take leadership roles as you grow in the organisation.
The company offers benefits like
- Healthcare coverage (including Covid-19 vaccination reimbursement)
- Technical certification fee reimbursements
- Technical training fee reimbursements
- 5-day work week
- Flexible working hours
- Hybrid working
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Our People
With over 1,500 team members across 15+ countries, we operate in a global, remote-first environment. We are building more than software; we are building a global community rooted in creativity, collaboration, and impact. We take pride in cultivating a culture where innovation thrives, ideas are celebrated, and people come first, no matter where they call home.
Our Impact
As of mid 2025, our platform powers over 1.5 billion messages, helps generate over 200 million leads, and facilitates over 20 million conversations for the more than 2 million businesses we serve each month. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen.
EEO Statement:
At HighLevel, we value diversity. In fact, we understand it makes our organisation stronger. We are committed to inclusive hiring/promotion practices that evaluate skill sets, abilities, and qualifications without regard to any characteristic unrelated to performing the job at the highest level. Our objective is to foster an environment where really talented employees from all walks of life can be their true and whole selves, cherished and welcomed for their differences while providing excellent service to our clients and learning from one another along the way! Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.
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