Performance Marketing Lead

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.

Who We Are

At Sonatype, we help organizations build better, more secure software by enabling them to understand and control their software supply chains. Our products are trusted by thousands of engineering teams globally, providing critical insights into dependency health, license risk, and software security. We’re passionate about empowering developers—and we back it with data.

The Opportunity

We’re looking for a Data Engineer with full stack expertise to join our growing Data Platform team. This role blends data engineering, microservices, and full-stack development to deliver end-to-end services that power analytics, machine learning, and advanced search across Sonatype.

You will design and build data-driven microservices and workflows using Java, Python, and Spring Batch, implement frontends for data workflows, and deploy everything through CI/CD pipelines into AWS ECS/Fargate. You’ll also ensure services are monitorable, debuggable, and reliable at scale, while clearly documenting designs with Mermaid-based sequence and dataflow diagrams.

This is a hands-on engineering role for someone who thrives at the intersection of data systems, fullstack development, ML, and cloud-native platforms.

What You’ll Do

• Design, build, and maintain data pipelines, ETL/ELT workflows, and scalable microservices.
• Development of complex web scraping (Playwright) and realtime pipelines (Kafka/Queues/Flink).
• Develop end-to-end microservices with backend (Java 5+, Python 5+, Spring Batch 2+) and frontend (React or any).
• Deploy, publish, and operate services in AWS ECS/Fargate using CI/CD pipelines (Jenkins, GitOps).
• Architect and optimize data storage models in SQL (MySQL, PostgreSQL) and NoSQL stores.
• Implement web scraping and external data ingestion pipelines.
• Enable Databricks and PySpark-based workflows for large-scale analytics.
• Build advanced data search capabilities (fuzzy matching, vector similarity search, semantic retrieval).
• Apply ML techniques (scikit-learn, classification algorithms, predictive modeling) to data-driven solutions.
• Implement observability, debugging, monitoring, and alerting for deployed services.
• Create Mermaid sequence diagrams, flowcharts, and dataflow diagrams to document system architecture and workflows.
• Drive best practices in fullstack data service development, including architecture, testing, and documentation.

What We’re Looking For

Minimum Qualifications

• 2+ years of experience as a Data Engineer or a Software Backend engineering role
• Strong programming skills in Python, Scala, or Java
• Hands-on experience with HBase or similar NoSQL columnar stores
• Hands-on experience with distributed data systems like Spark, Kafka, or Flink
• Proficient in writing complex SQL and optimizing queries for performance
• Experience building and maintaining robust ETL/ELT pipelines in production
• Familiarity with workflow orchestration tools (Airflow, Dagster, or similar)
• Understanding of data modeling techniques (star schema, dimensional modeling, etc.)
• Familiarity with CI/CD pipelines (Jenkins or similar)
• Ability to visualize and communicate architectures using Mermaid diagrams

Bonus Points

• Experience working with Databricks, dbt, Terraform, or Kubernetes
• Familiarity with streaming data pipelines or real-time processing
• Exposure to data governance frameworks and tools
• Experience supporting data products or ML pipelines in production
• Strong understanding of data privacy, security, and compliance best practices

Why You’ll Love Working Here

• Data with purpose: Work on problems that directly impact how the world builds secure software
• Modern tooling: Leverage the best of open-source and cloud-native technologies
• Collaborative culture: Join a passionate team that values learning, autonomy, and impact

Position Overview:

As a Frontend Developer, you will be responsible for creating and implementing innovative user interfaces and ensuring the seamless integration of design and functionality. The ideal candidate should have a minimum of 1.5 years of experience in front-end development, with a strong proficiency in React, JavaScript, SCSS, HTML, frontend architecture design, and design concepts

Responsibilities:

Collaborate with the design and development teams to translate UI/UX designs into interactive web pages or applications.

Develop responsive web interfaces and ensure cross-browser compatibility.

Write clean, modular, and maintainable code using best practices and coding standards.

Optimize application performance and ensure scalability.

Conduct thorough testing and debugging to identify and fix issues.

Collaborate with backend developers to integrate frontend interfaces with server-side logic.

Stay up-to-date with the latest front-end technologies, trends, and frameworks.

Participate in code reviews and provide constructive feedback to improve code quality.

Work closely with stakeholders to understand requirements and propose effective technical solutions

Qualifications:

Bachelor's degree in Computer Science, Engineering, or a related field.

Minimum 1.5 years of experience as a Frontend Developer.

Strong proficiency in React, JavaScript, CSS, and HTML.

Solid understanding of frontend architecture design patterns and concepts.

Experience with frontend frameworks like Redux, Vue.js, or Angular is a plus.

Familiarity with RESTful APIs and asynchronous request handling.

Knowledge of version control systems (e. g., Git) and project management tools (e. g., Jira).

Ability to collaborate effectively with cross-functional teams.

Strong problem-solving skills and attention to detail.

Excellent communication and interpersonal skills.

We are looking to hire an ingenious and talented Flutter Developer to join our team and create innovative apps using Scalable Code that are scalable and innovative.

Experience: 0.6-2 Years (Relevant Experience Only)

Work Mode: WFO Only

Location: Seoni, Madhya Pradesh

Priority: Immediate /Maximum 15-Day Notice Period Acceptable

Budget: ₹9,000–₹15,000 Monthly (Professional Tax & Insurance Deduction Exclusive)

Interview Rounds: 3 (HR, Technical, and Practical)

Working Days: 5 Days a Week (Monday–Friday) | 9:30 AM–6:30 PM

Leave Policy: 8 Paid Leaves *Terms Applied

Notice Period: 1 Month (Mandatory) - If Bypassed, No Relieving/Experience Letter Allotted

Provisional Period: 90 Days

No salary will be provided if the candidate leaves the company within 15 days

Commitment Period (Bond): Provisional Period + 365 Days (1 Year)

Motive: The mission statement of this position is to help create innovative and scalable mobile applications by collaborating with managers, designers, and backend developers.

Responsibilities:

- Collaborate with managers, designers, and backend developers to gather requirements and create a Flow and strategy for mobile applications.

- Integrate mobile applications with Laravel-based APIs, handling data exchange and ensuring data security.

- Write clean, efficient, and scalable code following industry best practices and coding standards.

- Build responsive and visually appealing user interfaces based on design specifications and UX guidelines.

- Make responsive mobile applications

- Conduct thorough testing of applications to identify and address any issues before deployment.

Qualifications:

- Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent work experience.

- Minimum of 6 months of relevant professional experience as a Flutter Developer.

- Strong proficiency in the Flutter framework for developing cross-platform mobile applications.

- Extensive experience in the Laravel framework for building robust and scalable APIs.

- Familiar with RESTful API integration and data handling in mobile applications.

Interview Pre-Requirements:

- Must read the complete job description and acknowledge self-fit for this position.

- Good internet connection/Wi-Fi.

- Diary and a pen to solve some questions.

- Working earphones and camera.

- Your previous work.

Parikshram is a Bangalore based tech startup company, building the world's first career success platform for QA-Testing professionals around the world. Currently running through the social media channels with the name of “Software Testing Studio" (soon to be renamed as Parikshram), it has an active user base of ~0.2 million testing professionals and focuses on recruitment, upskilling and community building. The company is growing at a rapid pace and is hiring aggressively.

• 2+ years experience in WordPress CMS Installation, theme customizations.
• Should possess strong knowledge of SEO, Secure sites, Wordpress, Web Design Good knowledge of WordPress development and life cycle (theme hierarchy, plugins, etc
• Strong understanding of PHP back-end development. Experience in front-end technologies like HTML5,CSS3,Bootstrap4,JavaScript,PHP.
• Basic Knowledge of Core PHP, MySQL Database.
• Experience in designing and developing responsive design websites.
• Ability to understand CSS changes and their ramifications to ensure consistent style across platforms and browsers.
• Ability to convert comprehensive layout and wireframes into working HTML pages. Payment Gateway integration for WooCommerce (eg: Paypal, Razorpay, etc).

• Bachelor’s degree in Computer Science, Software Engineering, or a related discipline
• 4+ years experience working in an IT environment
• 4+ years of Object-oriented design, functional programming
• Node JS API Development (Firebase API development is a plus)
• Angular or VUE or React JS Front end Development (VUE Js Experience is a plus)
• HTML / CSS responsive development
• Experience using any database
• Experience developing in an Agile / SCRUM Environment
• Experience developing mission-critical applications
• Strong business and technical acumen
• Excellent verbal and written communication skill