Senior AI Backend Engineer (Psychology Stack)

PixaSocial Ai builds viral social content on proprietary psychology and psychographic models - posts, visuals and campaigns, published across Instagram, X, LinkedIn and 12+ channels.

THE ROLE
Own the core backend services that turn psychological and psychographic models into reliable, explainable product behaviour: profiling signals, persona construction, scoring and the APIs that expose them to campaign operators.

WHAT YOU WILL DO
- Design and maintain the psychology/psychographic service layer: feature derivation, persona models, scoring endpoints, versioning of model behaviour.
- Keep model output trustworthy: validation, drift checks, reproducible runs, audit trails for why a persona was chosen.
- Build the inference and job orchestration around those models - queues, retries, cost and latency budgets.
- Partner with product and GTM so psychographic output is explainable to a marketer, not a black box.
- Take services from sketch to production and on-call. Python, Postgres, queues, HTTP APIs.

WHAT WE ARE LOOKING FOR
Mid-senior backend engineer (5-8 years) who has shipped and operated production services, comfortable with model-serving interfaces and data-heavy backends. US-based, remote or hybrid.

NICE TO HAVE
Applied ML serving, psychometrics or behavioural data, multi-tenant SaaS.

HOW TO APPLY (REQUIRED FOR THE NEXT INTERVIEW ROUND)
We only advance people who have used the product.
1. Create a free account at app.pixasocial.com/register
2. Use PixaSocial yourself: build an audience or campaign, generate content, try publishing/scheduling, and notice what is strong and what is broken.
3. Email with your resume and a cover letter that is not a CV rewrite - explain specifically how you would improve PixaSocial in this role: what you used, what you would change first, and why you are the person to do it.

Applications without a product-based cover letter will not be selected for interview.

Pixasocial LLC, 1209 Mountain Road PL NE Ste N, Albuquerque, NM 87110, USA. Equal-opportunity employer.