Senior Data Scientist

Intellias; Polska; On-site; PLN 220,000 - 320,000; Full time

Job summary

Intellias is building a modern data and AI platform to empower real-time decision making and enterprise-scale analytics. You will lead platform setup on Databricks, manage secure data ingestion, and implement scalable feature engineering for pseudonymised entity resolution and image processing at scale.

You’ll collaborate with customers’ platform teams to ensure robust, reproducible workflows and governance.

Qualifications

• Hands-on experience with PySpark and Spark SQL on large-scale data.
• Proficient in Databricks including Unity Catalog and Delta Lake.
• Experience with AWS and data security best practices.
• Strong knowledge of MLOps and model monitoring.

Responsibilities

• Platform setup and configuration of Databricks environment.
• Secure data ingestion with pseudonymisation and data quality checks.
• Develop scalable feature engineering pipelines.
• Support modelling experiments and comparative analyses.
• Automate end-to-end workflows and monitoring.
• Document runbooks and provide handover.

Skills

PySpark

Spark SQL

Databricks

AWS

Pseudonymisation

Entity resolution

Image processing

PyTorch

MLOps

Governance

Secrets Manager

Tools

Unity Catalog

Delta Lake

Auto Loader

S3

KMS

Job description

Let's breathe life into great tech ideas! With 3,000 people globally, Intellias is a company where benchmark technological solutions are born. Join in and take your part in digitalizing the world.

Project Overview:

Join a transformative data and AI platform initiative aimed at modernizing enterprise-scale capabilities and enabling real-time decision-making. This project delivers a comprehensive roadmap covering AI, MLOps, data governance, and platform scalability, supporting a shift towards data-first operations and intelligent automation.

Requirements:

• PySpark & Spark SQL: Nested-JSON flattening (explode, structs),`mapInPandas` / pandas UDFs, window functions for velocity and distinct-count aggregates, partitioning and performance tuning
• Databricks: Unity Catalog (catalogs, schemas, grants, column masks, tags, lineage), external locations on S3, cluster / compute policies incl. GPU, Auto Loader, Delta (MERGE, time travel, VACUUM), Workflows, Repos, secret scopes
• AWS: S3, IAM roles / instance profiles, KMS decryption in jobs, Secrets Manager, basic cost awareness
• Pseudonymisation in pipelines: HMAC tokenization with per-key-type keys, normalisation (Unicode NFKD, case, token sort), phonetic keys, never logging raw values, scripted deletion (DROP / VACUUM / secret destruction)
• Entity resolution (implementation): Blocking / candidate generation with exact and approximate keys, edit-distance tolerance, match scores, surrogate IDs, conflict counting rather than merging
• Image processing at scale: Running a GPU batch job that decrypts, crops and embeds images in memory (PyTorch / timm), PCA, LSH bucketing
• Mixed-data clustering: Hands-on: `kmodes` (k-prototypes), `gower` + `kmedoids` with sampling, R `kamila` on Databricks, `StepMix` (latent class), bootstrap ARI
• Feature selection: Mutual information, correlation pruning, PCA. Can run a BPSO / GA search with`mealpy`
• MLOps & monitoring: M*Lflow experiments and registry (aliases),Lakehouse Monitoring* (profile and drift metrics on Delta tables), SQL alerts, PSI / JS divergence
• Handover: Writes runbooks and README-level documentation. Leaves a single end-to-end Workflow that someone else can run
• Nice to have
• Experience with AssureID / identity-verification JSON outputs.
• PyOD and basic PyTorch training (to support A on the VAEs in week 2).

Responsibilities:

• Platform setup. With customer's platform team, provision and configure the Databricks environment in customer's cloud account: catalog and permissions, compute (including GPU), secrets, experiment tracking.
• Secure data ingestion. Build repeatable ingestion of raw verification outputs and document images: parsing, pseudonymisation, data-quality checks, schema handling.
• Feature engineering at scale. Implement the feature tables:
• batch image-embedding jobs;
• exact and approximate linkage keys;
• cross-transaction and velocity aggregates;
• pseudonymous entity resolution.
• Modelling support. Implement feature-selection and mixed-data clustering methods. Run model comparisons and stability tests, and support density-model training runs.
• Automation. Orchestrate the end-to-end pipeline as a scheduled, idempotent, re-runnable workflow.
• Monitoring. Set up the data-quality and drift-monitoring prototype, with alerting, on feature and score tables.
• Privacy engineering. Implement access controls, provenance fields, lineage and the scripted deletion procedure. Confirm that no raw personal data reaches the analytic layer.
• Documentation and handover. Write runbooks and give a live walkthrough, so engineers can operate everything independently