Senior Data Platform Engineer

About Aperia Solutions

Aperia Solutions is a leading payments SaaS company headquartered in Dallas Texas. We build risk management residuals accounting compliance and analytics platforms used by merchant banks ISOs payment processors and other participants in the credit card payments ecosystem. Operating under PCI DSS 4.0 compliance across dual on-premises datacenters (Allen TX and Chicago IL) plus Azure cloud we process high-volume payment data for some of the industrys largest players.

Were in the middle of a significant platform modernization program: a next-generation risk analysis and scoring platform on Microsoft Fabric an AI-powered ingestion platform new AI-native applications and ongoing evolution of the products our clients rely on every day. The teams executing this work are deliberately small and senior with executive-level support and minimal bureaucracy. Every senior hire is a founding contributor to the architecture and the code.

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About the Role

Aperia is building a next-generation risk analysis and scoring platform on Microsoft Fabric and this role owns its medallion data architecture end-to-end. Youll design and build Bronze / Silver / Gold Delta tables Fabric Spark feature pipelines Direct Lake semantic models and physical-layout optimizations. This is our highest-utilization engineering role on the project central to both Phase 1 platform foundation and Phase 2 risk product delivery working alongside a Senior Technical Lead Senior DevOps engineer and mid-level developer.

The platform ingests transaction and merchant data from clients via SFTP and API tokenizes sensitive PAN data at the ingestion boundary using our reserved-BIN HMAC-derived format-preserving scheme and lands data in Aperias canonical Silver on Microsoft Fabric per our internal canonical spec. Youll build the pipeline that populates canonical Silver via MERGE consume it via OneLake shortcuts and materialize risk-specific Gold tables that feed both custom-authored DMN rules and pre-scored Mastercard Brighterion feeds.

What Youll Do

• Design and implement Bronze canonical Silver and Gold Delta table schemas with PAN-safe physical layout statistics allowlist configuration liquid clustering deliberate retention settings V-Order optimization.

• Build Fabric Spark notebooks for the feature pipeline (rolling velocity features across 24h / 7d / 30d windows merchant-level rolling features hierarchical rollups cross-merchant features via pantoken joins).

• Author per-flavor-version Silver adapters one function per flavor unioned by name tested against golden fixtures.

• Build the canonical MERGE DAG (Bronze canonical Silver idempotent on naturalkey per Aperias canonical Fabric internal spec v1.4).

• Build the Gold materialization pipeline for both grains (facttransactionrisk factmerchantrisk) with correct score-source stamping and idempotent merge semantics.

• Design and implement Direct Lake semantic models per reporting surface; performance-test against representative data volumes.

• Configure OneLake namespace layouts workspace catalogs and cross-workspace shortcut relationships with the residuals programme.

• Establish idempotent Delta write patterns using delta-rs from Python containers (segmented parallel writes with single atomic commit).

• Fabric capacity sizing (F-SKU selection load testing Reservation vs PAYG decisions).

• Partner with the DevOps engineer on Fabric IaC (Terraform capacity provisioning plus Fabric REST workspace bootstrap).

• Consult on ClickHouse contingency if Direct Lake latency proves insufficient for client-tier UIs.

What You Bring

• 5 years data engineering experience with at least 2 years hands-on Spark development (PySpark preferred).

• Deep Delta Lake internals knowledge transaction log format checkpoints retention settings (logRetentionDuration deletedFileRetentionDuration) VACUUM OPTIMIZE deletion vectors statistics collection.

• Parquet format expertise footers statistics allowlists row-group sizing dictionary encoding column indexes.

• Microsoft Fabric hands-on experience workspaces capacities notebooks lakehouses semantic models Direct Lake SQL analytics endpoint.

• SQL performance tuning skills for both OLAP (Fabric) and OLTP (PostgreSQL) workloads.

• Strong Python data engineering skills pandas PyArrow delta-rs.

• Ability to communicate architecture clearly in writing and to work autonomously on well-scoped features.

Nice to Have

• PCI-scoped data platform experience.

• Financial services or payments domain background.

• Power BI semantic model authoring (DAX).

• Familiarity with published data-standard governance patterns logical model vs physical profile SCD2 dimensions natural-key idempotency extension attribute stores.

• OneLake shortcuts and cross-workspace lakehouse patterns.

• ClickHouse or similar OLAP engine familiarity.

• Terraform for Azure data resources.

• Prior experience with fluid or schema-flexible ingestion patterns.

Why Aperia

• Founding-member impact on a strategic platform serving a multi-hundred-million-dollar industry your architectural decisions carry weight and ship to production.

• Direct working relationship with the SVP of Technology; small team; minimal bureaucracy; senior peers.

• Genuine engineering culture technical correctness valued over slideware; extensive design documentation; real design reviews; ADR discipline.
• Explicit team commitment to AI-assisted development (Claude Code Cursor GitHub Copilot) treated as a first-class productivity multiplier not a novelty. Team standards documented and enforced.
• Modern tech stack: Microsoft Fabric AKS Azure Airflow Python Delta Lake Kogito/DMN OpenBao Kubernetes.

Eligibility Requirements

• Must be willing to submit to a background investigation and drug test as part of the selection process.

Job Type

• Full-time

Schedule

• Hybrid / Monday to Friday

Work Location

• Dallas TX

Benefits

• Health insurance
• Health savings account
• Dental insurance
• Vision insurance
• 401(k) matching
• Life insurance
• Paid time off
• Parental leave
• Disability insurance
• Childcare assistance
• Education reimbursement
• Fitness membership
• Volunteer time off