Data Scientist III

Rekruton Global IT Services; Ahmedabad District; On-site; INR 2,000,000 - 3,200,000; Full time

Job summary

Rekruton Global IT Services is seeking a Data Scientist III to own the analytical strategy for a core product area and drive production-grade systems at scale.

You will build and monitor model-serving pipelines, apply LLMs and RAG, and mentor junior data scientists while ensuring governance and compliance in production environments.

Qualifications

• Hands-on 5+ years in data science and ML, including production systems.
• Experience with MLOps, model serving, ETL, and governance tooling.
• Proven ability to scale ML models to production workloads.
• Strong experience with LLMs, RAG, and embedding-based retrieval.
• Ownership of end-to-end projects with measurable business impact.
• Expertise in experimental design (A/B testing, causal methods).
• Mentorship of junior data scientists and code reviews.

Responsibilities

• Own end-to-end analytical framework from problem framing to production deployment and monitoring.
• Apply LLMs, prompt engineering, and RAG to real product problems.
• Evaluate tool choice vs simpler models to ensure optimal performance.
• Hands-on coding to develop AI/ML solutions and scale them.
• Design data pipelines and model-serving workflows for production.
• Implement model monitoring, drift detection, and governance.
• Mentor Data Scientist I/II, reviewing modeling and code.

Skills

MLOps

LLMs

RAG

LangChain

LangGraph

Pinecone

FAISS

Weaviate

SQL

Python

Model deployment

ETL pipelines

Education

B.Tech / MS in Computer Science, Data Science, or related field

Tools

Pinecone

FAISS

Weaviate

LangChain

LangGraph

AWS Bedrock

Job description

Job Role

As a Data Scientist III, you will own the analytical strategy for a core product area and take it all the way to a governed, monitored production system at scale, not just a working notebook. This role owns model-serving workflows end-to-end: you will define and optimize the data pipelines and ETLs that feed your models, build models that hold up under real production load, and implement the monitoring and governance that keeps them trustworthy over time. You will also mentor other data scientists doing the same.

Key Responsibilities

• Own the end-to-end analytical framework for a product area, i.e., from problem framing through production deployment and monitoring, with minimal oversight
• Apply LLMs, prompt engineering, and retrieval-augmented generation (RAG) to real product problems — e.g., translating complex targeting/attribution outputs into plain language insights, or building AI-assisted workflows for internal or client-facing tools.
• Evaluate when generative AI is the right tool versus when a simpler model or heuristic will outperform it. This role is expected to have informed judgment here, not default-to-LLM instincts
• Stay hands-on: personally build, code, and develop AI/ML solutions rather than only architecting and delegating
• Build models that scale to production data volumes and real-time serving loads, not just prototypes that work on a sample
• Define and optimize data pipelines, ETLs, and AI model-serving workflows for your domain; this is not handed off to a separate MLOps function
• Implement model monitoring and governance (drift detection, performance tracking, retraining triggers, audit trails) so that production models stay reliable and defensible under compliance scrutiny
• Design measurement approaches for problems where clean ground truth doesn't exist
• Mentor and provide technical guidance to Data Scientist I/II team members; review and approve their modeling and code before it ships.
• Design and defend experimentation approaches (A/B testing, causal inference, uplift modeling) that hold up under stakeholder and compliance scrutiny
• Drive adoption of better MLOps tooling, scalability practices, or modeling methods across the data science team
• Proactively identify whitespace opportunities in product roadmap and bring data-backed recommendations to stakeholders, not just answers to their questions.

Skills Required

• Education: B.Tech / MS in Computer Science, Data Science, or a related field.
• At least 5 years of hands-on experience in data science and machine learning (both) is a must have
• Hands-on MLOps experience is a must have. You should be comfortable owning a model from training through deployment, serving, and production monitoring, not handing it off once it works in a notebook. This includes experience with model-serving infrastructure, pipeline/ETL orchestration, and monitoring or governance tooling (drift detection, performance dashboards, retraining triggers)
• Proven experience building and scaling machine learning models to handle production data volumes, throughput, and latency requirements is a must have. This means designing for scalability up front, not retrofitting it after something breaks in production
• Hands-on experience with LLMs and RAG architectures is a must have. This includes practical experience with prompt engineering, embedding-based retrieval, and vector databases (e.g., Pinecone, FAISS, Weaviate), and frameworks like LangChain/LangGraph or AWS Bedrock
• Demonstrated ownership of at least one modeling project taken fully end-to-end into production, with measurable business impact
• Experience designing and running experiments (A/B testing, or causal inference methods such as DiD, IV, PSM, uplift modeling) is non-negotiable
• Track record of mentoring or reviewing the work of junior data scientists is a must have
• A strong knowledge of SQL, data structures, and query optimization at a level where you can review others' queries, not just write your own
• Experience fine-tuning generative AI models (not just calling APIs) for real-world applications is highly desirable
• Familiarity with AI agent orchestration and multi-step agentic workflows is a plus
• Prior experience in advertising technology, programmatic media buying, or another high-scrutiny/regulated data domain is highly advantageous and good to have.

Personality & Work Ethic

• A strategic thinker who sets technical direction for a problem area, not just aligns to one
• Comfortable operating in ambiguity where the "right" ground truth doesn't exist yet
• Excellent communication skills, with a track record of influencing product or technical decisions using data
• Genuine mentorship instinct; has grown at least one junior team member's skills, not just supervised their output
• Ownership mentality that extends past "the model works" to "the model is scalable, monitored, governed, and still trustworthy six months from now."
• Doesn't let a research rabbit hole delay a hard deadline

Skills: faiss,llm,langgraph,langchain,data science,model training,etl pipelines,machine learning,pinecone,data modelling,mlops,a/b testing