Principal Architect & Lead Data Scientist

Are you interested in working with the World’s leading AI-first Quality Engineering Company? Ready to advance your career, team up with global thought leaders across industries and make a difference every day? Join us at QualityAI!

We are looking for a Principal Architect & Lead Data Scientist to join our growing team in United States!

Why the role exists:
The program rests on one hard property: any past moment must be servable exactly as it stood, including a world graph that AP rewrites continuously as stories are updated. Reconstructing that graph as of a prior timestamp is the single highest-risk component in the design, and this role owns it.
It is deliberately one role and not two. The person who designs the point-in-time platform has to understand why the measurement needs it, and the person defining the measurement has to know what the platform can honestly serve. Splitting the two produces a platform that is elegant and a back-test that is wrong.

Accountabilities:

• Architecture - owns the technical design across the point-in-time platform, the validation engine, the assurance record and the surfaces on top of them.
• Point-in-time platform - landing zone, fact layer and signal store, arrival-stamped and immutable; the time-travel joins the back-test depends on.
• Graph-as-of service - reconstructs AP's mutable world graph at any prior timestamp - the critical dependency of the whole assurance case.
• Read-only taps - the three consumption points off AP's pipeline, and the guarantee that Quality-AI never writes back into it.
• Assurance record - append-only, hash-chained, daily-sealed, write-once retention, reconstruct-able on demand.
• Leakage prevention - the assertion suites that fail the build when future data reaches a training or scoring path.
• Technical leadership - day-to-day direction of the delivery team; the person AP's architects call.
• Transfer - hands the platform to AP Dev/Ops with the documentation and the rehearsal to run it.

Required experience:

• Senior architecture experience on data-intensive platforms, with production accountability rather than advisory-only exposure.
• Bitemporal and point-in-time data modelling: event time versus knowledge time, vintages, restatements retained rather than overwritten.
• Feature stores and time-travel joins, and a working understanding of how they leak when built naively.
• Graph databases in production - ideally neo4J - including change data capture on a mutable graph.
• Strong Python; comfortable owning both the pipeline and the analysis running on it.
• Cloud platform depth on AWS or Azure: storage tiering, IAM, immutability and write-once retention.
• Genuine data science credibility - able to hold a technical conversation with a validation lead and a client data science team on equal terms.
• Has led a small senior team through a first production release and a client handover.

Also valuable:

• Streaming architectures - Kinesis, Kafka - and the ordering and replay guarantees they do and do not give.
• Audit-grade evidence systems: hash chaining, sealing, retention lifecycle, reconstruction.
• Experience with news or content pipelines, entity resolution and canonicalization.
• Prior work under a model risk or audit regime.

Benefits:

Why QualityAI?
QualityAI is an AI-first quality engineering company helping enterprises deploy and scale complex systems with greater confidence. Operating across data, models, platforms, infrastructure, and operational environments, the company provides assurance and engineering expertise that helps organizations ensure systems perform reliably in real-world conditions.

Formerly Qualitest, QualityAI supports global enterprises across regulated and technology-driven industries, combining deep engineering heritage with AI-enabled delivery, operational assurance, and lifecycle expertise to help clients achieve certainty at go-live.

• Be a part of a company who strives to support for diversity and inclusion in the workplace - we are one, we are many at QualityAI. Celebrate culture, share knowledge with engineers from around the globe, and inspire each other through our differences.
• Local and global opportunities - we offer you internal rotation and international mobility opportunities to grow your career.
• Clear view of your career and progression with the company - QualityAI is growing massively (since Jan 2021 - added more than 2000 engineers) and giving you the opportunity to grow with us.
• Work hard and play harder with our flexible and casual culture. Take a break from work and join an employee event, or enjoy the amenities and games provided from one of our Employees Centers.
• Never stop experimenting and learning with QualityAI Tech academy: 3000+ training courses, mentorship programs, technical tribes, sponsored certifications, leadership programs and much more.
• Earn bonuses via our Client Referral and Employee Referral Program’s. Refer and earn - tap your network for net-worth.
• A Competitive pay, the salary range for the role is $200,000 - $230,000.

If you like what you have read, send us your resume and let’s start talking!
Intrigued to find more about us?
Visit our website at https://www.QualityAIgroup.com/
If you like what you have read, send us your resume and let’s start talking!
LinkedIn: https://www.linkedin.com/company/qualityaigroup