Senior Python / AI Engineer — Core Team @ Zumlo

About Zumlo

Zumlo is an always-on well-being companion—one place for immediate help, gentle structure, and progress you can see. We unify mind, body, emotions, and relationships through timely support, a caring community, and personalized guidance that fits real life.

What we stand for : Human first

• Simple >

complex

The role (why it’s rare)

AI isn’t a bolt-on here—it’s the nervous system of the product. We’re hiring a senior who has already shipped LLM + retrieval to production and wants end-to-end ownership : problem framing, modeling / orchestration, evaluation, privacy / safety, and the Python services that make it real.

What you will own

Product AI (end-to-end)

Build AI across product surfaces : conversational help, guided steps, tailored activities, “what to do next,” summaries / explanations, and safety checks—grounded with retrieval and citations.

Turn fuzzy needs into robust flows : prompt design, tool / function calling, JSON-schema outputs, fallbacks, streaming, controllable tone and safety boundaries.

Retrieval & knowledge

Do RAG right : chunking / segmenters, embeddings, vector DBs (FAISS / qdrant / Pinecone / Milvus), hybrid semantic + re-rankers (BGE / ColBERT), dedupe, freshness policies, provenance.

Rapid test & evaluation loop

Make eval routine : golden sets, adversarial suites, shadow evals, canaries, online metrics tied to user outcomes. Capture in-app feedback and close the loop weekly.

Safety, privacy, governance

PHI / PII redaction, prompt-injection defenses, output guardrails, rate limits, audit trails, safe logging. Clear data-handling notes for the team.

Backend & reliability

Own Python services : FastAPI,

Postgres (schemas / migrations), Redis, task queues, retries / idempotency, auth / RBAC, feature flags.

Observability first : logs / metrics / traces, alerting that matters, simple SLOs—systems that are predictable and calm.

Data & experimentation

Trustworthy event tracking, simple SQL cohorting, per-feature cost / latency dashboards, A / B hooks so product / growth can run honest tests.

Exploration & de-risking

Evaluate models / embeddings, inference servers (vLLM / TensorRT-LLM), compression / quantization, token-efficiency. Prove value with small, cheap spikes before big changes.

Collaboration & leadership

Partner with product, mobile (React Native / TS), and platform.

Review PRs, write concise docs / runbooks, mentor juniors, and help hire the next 1–2 great engineers.

Must-have experience

7+ years software engineering with 4+ years Python shipping production APIs / services.

Production LLM + RAG you can discuss end-to-end : retrieval, orchestration, evaluation, and user impact.

RAG depth : embeddings, vector DBs (FAISS / qdrant / Pinecone / Milvus), hybrid search, re-rankers, citation strategies.

Backend foundation : FastAPI / Django / Flask, Postgres / SQL, Redis, queues (Celery / RQ), testing (pytest), CI / CD, containers.

Eval mindset : offline metrics + online behavior; sample-size sense; knows when to ship, iterate, or kill.

Security / privacy : least-privilege, secrets, encryption, safe logging; comfortable with sensitive data.

Strong plus

Well-being / health context; HIPAA-aware practices.

Azure & Azure DevOps pipelines; GPU inference; streaming responses.

Telemetry for AI : prompt / version tracking, per-feature cost / latency, drift monitors.

Worked across US + India user bases / time zones.

How you work (what we value)

Builder energy :

ship → measure → iterate.

Creative + logical :

playful with ideas, strict with evidence.

Product-curious :

start with the user problem and “definition of good.”

Kind, direct, low-ego :

crisp commits / PRs, generous feedback.

Owner’s mindset :

reliable, documented, observable.

Work setup

Remote-first in India, collaborating closely with a small core team.

Preference for Ahmedabad for an eventual in-person cadence; open across India for the right fit.