Senior Data Analyst / Data Science Engineer (Python & Statistical Mode

Tekskills Inc.; Bengaluru; On-site; INR 1,500,000 - 2,700,000; Full time

Job summary

Tekskills Inc. in Gurugram seeks a Senior Data Analyst / Data Science Engineer with 7+ years in Python-based analytics and statistical modelling (regression, forecasting).

You will convert complex Excel models into robust Python pipelines and validate parity. Responsibilities include building and validating regression/time-series models, comprehensive data wrangling and EDA, model governance, and productionization with unit tests and automation.

Qualifications

• 7–10 years in analytics/data science with Python proficiency (pandas, numpy, statsmodels, scikit-learn).
• Strong command of regression techniques and model diagnostics.
• Experience converting Excel models into Python pipelines.
• SQL proficiency for data extraction and joins; solid EDA and data quality practices.
• Clear, structured communication; stakeholder management and requirement grooming.
• Version control (Git), notebook hygiene, and documentation habits.

Responsibilities

• Migrate existing Excel-based analytic/financial/statistical models into Python with parity and robustness.
• Design, build, and validate regression and related models (e.g., Linear/Logistic/Elastic Net, Timeseries).
• Data wrangling & EDA: clean/transform large datasets, feature engineering, handle missing data.
• Model governance: document assumptions, diagnostics, backtesting, and performance metrics.
• Productionization: package models into versioned Python modules with tests and automation scripts.
• Stakeholder engagement: translate business questions into modelling problems and explain outcomes.
• Collaboration: work with data engineering, BI, and product teams to deploy results.
• Optimization: refactor legacy logic and improve runtime and reproducibility.
• Documentation & handover: maintain clear readmes, changelogs, and SOPs.

Skills

Python

Pandas

NumPy

Statsmodels

Scikit-Learn

Data Wrangling

Regression

Forecasting

Git

Documentation

Tools

Excel/VBA

OpenPyXL/xlwings

Airflow

Docker

Power BI

Tableau

AWS

Job description

Role: Senior Data Analyst / Data Science Engineer (Python & Statistical Modelling)

Location: Gurugram

Role Overview

Core mission: Own and productionize statistical models in Pythonprimarily regression and forecasting—by translating legacy Excel models into robust, tested, and scalable Python pipelines.

We’re looking for a Senior Data Analyst / Data Science Engineer with 7+ years of handson experience in Python-based analytics, statistical modelling (regression, forecasting, GLM), and strong data wrangling. You will convert complex Excel models into Python, validate parity, enhance them with software engineering best practices, and deploy them as reusable components/pipelines. The ideal candidate is equally comfortable discussing model assumptions with business stakeholders and implementing productionready code with tests and documentation.

Responsibilities

• Migrate existing Excel-based analytical/financial/statistical models into Python with feature parity, improved performance, and robust error handling.
• Design, build, and validate regression and related statistical models (e.g., Linear/Multiple Regression, Logistic, Elastic Net, Timeseries/ARIMA/Prophet, Panel data as applicable).
• Data wrangling & EDA: Clean, join, transform large datasets; exploratory analysis; feature engineering; handling outliers and missing data.
• Model governance: Document assumptions, diagnostics (VIF, residuals, multicollinearity, heteroskedasticity), backtesting, and performance metrics (RMSE/MAE/AUC as relevant).
• Productionization: Package models into versioned Python modules/notebooks/pipelines; write unit tests, data validation checks, and automation scripts (e.g., cron/Airflow).
• Stakeholder engagement: Translate business questions into modelling problems; communicate insights, tradeoffs, and explain model outcomes to nontechnical audiences.
• Collaboration: Partner with data engineering to access data; with BI teams to publish results (dashboards, APIs); with product/ops to integrate into decision flows.
• Optimization: Refactor legacy logic, improve runtime, and reduce manual effort through automation and reproducible analysis.
• Documentation & handover: Clear readme, change logs, model cards, and SOPs for ongoing maintenance.

Musthave qualifications

• 7–10 years in analytics/data science with demonstrable Python proficiency (pandas, numpy, statsmodels, scikitlearn).
• Strong command of regression techniques (linear, logistic, regularization, model diagnostics, crossvalidation).
• Proven experience converting Excel models into Python (e.g., complex formulas, lookups, macros/VBA logic translated to Pythonic pipelines).
• SQL proficiency for data extraction and joins; solid EDA and data quality practices.
• Clear, structured communication; stakeholder management and requirement grooming.
• Version control (Git), notebook hygiene, and documentation habits.

Nice to have

• Timeseries modelling (ARIMA/SARIMA/Prophet), survival analysis, or Bayesian methods.
• Workflow orchestration (Airflow/Prefect), CI/CD for analytics, basic Docker.
• Experience with Excel/VBA for model understanding; OpenPyXL/xlwings helpful.
• Cloud exposure (AWS/GCP/Azure) for data/compute; basic API integration.
• Visualization: matplotlib/seaborn/plotly; BI tools (Power BI/Tableau).
• Domain exposure to financial modelling, pricing, marketing analytics, risk, or operations (as applicable).