XSLT Developer

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.

Job Title: PostgreSQL Database Administrator

Experience: 6–8 Years

Work Mode: Hybrid

Locations: Hyderabad / Pune

Joiners: Only immediate joiners & candidates who have completed notice period

Required Skills

• Strong hands-on experience in PostgreSQL administration (6+ years).
• Excellent understanding of SQL and query optimization techniques.
• Deep knowledge of database services, architecture, and internals.
• Experience in performance tuning at both DB and OS levels.
• Familiarity with DataGuard or similar high-availability solutions.
• Strong experience in job scheduling and automation.
• Comfortable with installing, configuring, and upgrading PostgreSQL.
• Basic to intermediate knowledge of Linux system administration.
• Hands-on experience with shell scripting for automation and monitoring tasks.

Key Responsibilities

• Administer and maintain PostgreSQL databases with 6+ years of hands-on experience.
• Write and optimize complex SQL queries for performance and scalability.
• Manage database storage structures and ensure optimal disk usage and performance.
• Monitor, analyze, and resolve database performance issues using tools and logs.
• Perform database tuning, configuration adjustments, and query optimization.
• Plan, schedule, and automate jobs using cron or other job scheduling tools at DB and OS levels.
• Install and upgrade PostgreSQL database software to new versions as required.
• Manage high availability and disaster recovery setups, including replication and DataGuard administration (or equivalent techniques).
• Perform regular database backups and restorations to ensure data integrity and availability.
• Apply security patches and updates on time.
• Collaborate with developers for schema design, stored procedures, and access privileges.
• Document configurations, processes, and performance tuning results.

We are looking for an enthusiastic and skilled SDE 2 React Web Developer to join its dynamic engineering team. As an SDE 1, the developer will be responsible for building and maintaining user-facing features for the web platform using React. The developer will work closely with cross-functional teams to deliver high-quality, scalable, and efficient applications that offer an exceptional experience to Revv's users.

Responsibilities

• Develop responsive, user-friendly, and high-performance web applications using React.js and related technologies.
• Collaborate with product managers, designers, and other engineers to deliver new features and improve existing ones.
• Write clean, maintainable, and testable code, ensuring a high level of code quality.
• Optimize applications for maximum speed and scalability.
• Troubleshoot and debug application issues, ensuring a smooth user experience.
• Stay up-to-date with the latest industry trends and best practices in web development.
• Participate in code reviews and contribute to continuous improvement within the team.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Proficiency in React.js, JavaScript (ES6+), HTML5, and CSS3.
• Experience with state management libraries like Redux or Context API.
• Familiarity with version control systems, primarily Git.
• Knowledge of RESTful APIs and integrating them into front-end applications.
• Strong understanding of web performance optimization techniques.
• Basic experience with testing frameworks like Jest, Mocha, or Enzyme.
• Strong problem-solving skills and ability to work independently and as part of a team.

Role- Recruiter

Location: Remote (Candidates from Indore Location are preferred)

Experience Required - 3 to 4 Years 

Immediate joiners are preferred.

We are seeking a driven and experienced Senior Technical Recruiter with 3 to 4 years of experience in staff augmentation. In this role, you will be responsible for sourcing, screening, and placing top IT talent for short-term and long-term contractual positions. You will also manage relationships with staffing vendors and internal teams to ensure successful placements for clients.

Key Responsibilities:

Full Recruitment Cycle: Manage the complete recruitment process for staff augmentation roles, including contract, contract-to-hire, and direct placement positions.

Sourcing Techniques: Leverage a variety of sourcing methods (job boards, social media, networking) to attract qualified IT professionals for staff augmentation roles.

Vendor Management: Build and maintain strong relationships with staffing vendors to ensure access to a diverse pool of candidates and meet client hiring demands.

Screening & Interviews: Conduct initial screenings, technical assessments, and interviews to evaluate candidates' technical expertise and cultural fit for client requirements.

Offer Extension & Negotiations: Extend offers and negotiate terms with candidates, ensuring alignment with both client expectations and candidate needs.

Onboarding Support: Facilitate the onboarding process for candidates and work closely with clients to ensure smooth transitions for new hires.

Collaboration: Collaborate with internal teams and clients to align recruitment strategies and successfully meet hiring needs.

Qualifications:

Bachelor’s Degree in Human Resources, Business, or a related field.

3 to 4 years of experience in technical recruitment, specifically within staff augmentation and contractual hiring.

Strong understanding of IT roles and technologies relevant to staff augmentation.

Proven experience in vendor management and building strong relationships with staffing partners.

Excellent communication and negotiation skills to engage with both candidates and clients.

Ability to multitask and manage multiple hiring projects for different clients.

Proficiency in recruitment software and tools used in staff augmentation.

If you're passionate about recruiting top IT talent and excited about working in a dynamic, growth-driven environment, we'd love to hear from you!

Company Profile: 

Machwan Communication & Research is INDIA'S LEADING business intelligence, data management & data analytics company, Headquartered in New Delhi and branch office at Noida . Established in the year 2005 and have been on an epic ride ever since. Machwan helps businesses to effectively drive their marketing and sales campaigns by fueling their campaigns with data-driven insights & actions, resulting in increased ROI and time-bound results.We transform DATA into actionable insights & essential intelligence which is required at every step of the business decisions.

Website: https://www.machwan.com

 REQUIREMENT:

Fresher’s and 1 year working experience. Client / customer coordination experience is required if experienced.

Fluency in English and writing skill of corporate communications is a must 

Tele-calling experience in a BPO / KPO is preferable 

JOB DISCRIPTION:

• Discovery of customers to generate database opportunities using secondary research as per client needs.

• Making cold calls, intermediate calls, follow up.

• Manage, nurture and convert leads into MQL/SQL.

• Identify strong potential prospects using creative skills.

• Advocating client’s products

• Work smoothly with good communication and higher conversion of leads and build happy environment in office.

• Provide accurate and timely information as required to managers and senior management.

• Influencing & pursuing the customer 

• Building a list of prospect and creating business opportunity for the client

• Finally aligning the customer with the client

• Sometimes inviting customers to participate in the events sponsored by the client   

• Out reaching accounts using emails and other channels.

• Adhere to company policies, procedures, culture, and business values.

• Passionate and learn to research about the lead/marketing industry.

● Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

● Thorough understanding of React.js and its core principles

● Experience with popular React.js workflows (such as Flux or Redux)

● Familiarity with newer specifications of EcmaScript as well as HTML and CSS

● Experience with data structure libraries (e.g., Immutable.js)

● Working knowledge and integration knowledge with RESTful APIs

● Knowlegde of websockets implementation is a must.

● Knowledge of modern authorization mechanisms, such as JSON Web Token

● Familiarity with modern front-end build pipelines and tools

● Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

● Ability to understand business requirements and translate them into technical requirements.

● A knack for benchmarking and optimization

● Familiarity with code versioning tools {such as Git}

● Added advantages if you have working knowledge of AWS

About Us

PurpleRain is a US-headquartered 8+ year old close-knit, fully distributed bootstrapped and profitable product startup with 50+ rock star team members who enjoy the challenge of solving hard problems together with inc 500 clients globally through our B2B SaaS products.

We are a hybrid remote company, with in-house teams in Bangalore, London and remote teams globally in 20+ countries where each employee works from home or a co-working space.

Even though we're far away, we're in contact throughout the day in Slack, Basecamp and Zoom.

We encourage continual education through weekly lunch and learns and taking courses to keep us ahead of the latest advancements with yearly retreats.

SEO Manager- Job Description

• Increase revenue through meaningful user growth and retention strategies for each of PurpleRain s products

• Identify new or unused marketing techniques and set up tests to validate results

• Design and coordinate promotional campaigns, PR and other marketing efforts across channels

• Establish a regular rhythm of reporting on marketing analytics to the executive team

• Manage marketing budget and spend

• Liaise with product, finance and customer support to guide a unified approach to marketing and business objectives

• Work with leadership team to build and execute online marketing campaigns for Pandable’s clients

• Perform day to day digital marketing activities including social media, email marketing, content creation and promotion

• Manage CRO, A/B testing and landing page optimisation

• Set up and manage Google Ads accounts and campaigns (including search, display and shopping)

• Support with content outreach and link building campaign strategies

• Develop strategies to drive online traffic, e-commerce growth, and increased visitor traffic to our wineries.

• Manage digital marketing campaigns through a variety of channels including but not limited to: web, mobile, SEO, PPC, and social.

• Define the process for creating, editing, and delivering high-impact content campaigns across multiple digital channels to our target audiences.

• Track and analyze conversion rates and overall website performance and optimize over time.

•  Collaborate with key business partners in marketing and across the organization on campaigns that increase brand awareness.

• Improve the usability, design, content, and conversion of online platforms in collaboration with marketing, technology, and e-commerce teams.

• Work with e-commerce and brand management team to identify and execute campaigns to drive awareness, visitor traffic, and revenue.

• Identify enhancements that create best-in-class digital experience for customers.

• Focus on website performance, insights, and opportunities that drive toward company goals and key performance metrics.

• Support brand teams by documenting best practices for digital marketing.

• Manage campaign budgets and vendor relationships.

• Partner with outside agencies to test digital marketing strategies.

Our Core Values

• We lead with empathy: We believe kindness and empathy lead to effective communication. We assume good intentions and seek mutual understanding from our teammates, customers, and users.

• We lean into vulnerability: We are not afraid to ask for help or give and receive feedback. We build off our failures and don’t shy away from tough conversations.

• We rise above the status quo: The status quo leads to pain for the people we serve, our communities, and our clients. We do our best to rise above the status quo, and to do things that no one else is doing. On an individual level, we strive to improve ourselves and always be learning.

• We match grit with wit: We're creative and resourceful. We find solutions to every problem

and to further support you, we offer:

• talented, young and motivated team

• work with a fun team on a product that customers love

• Share in our organization-wise personal development benefits and leave entitlements

• Flexible work schedule with work-from-home options