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 • Privacy & trust • Evidence over hype • Inclusive by default
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.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 • Privacy & trust • Evidence over hype • Inclusive by default.
The role
You'll own our React Native app. First: understand the existing codebase quickly and stabilize what matters. Then: lead architecture, performance, and product polish while working closely with back-end (REST APIs), design, and our Python/AI services to ship thoughtful, reliable features.
What you will do
Take over & stabilize
Map the codebase (state, navigation, data flows), surface risks, pay down critical debt.Establish clean release hygiene: versioning, changelogs, OTA strategy (CodePush/EAS), crash/error budgets.Build forward (React Native core)
Lead architecture, navigation, and state management (Redux/RTK, Recoil, or Zustand-choose and justify).Build pixel-perfect, accessible UI; smooth micro-interactions (Reanimated/Skia/Lottie when it adds real value).Implement offline-first patterns (TanStack Query/React Query, background sync, retry queues).Own deep links, push notifications, secure storage (Keychain/Keystore), permissions UX, theming/dark mode, and i18n readiness.Work seamlessly with the back-end
Integrate REST APIs (and GraphQL if needed) with typed clients, timeouts/retries, idempotent actions, and crisp error boundaries.Collaborate on contracts and versioning with back-end; keep DTOs/types generated and in sync.Integrate AI sanely
Consume LLM-powered endpoints from our Python services (streaming UIs, tool results).Handle partial/streaming states, guardrails, redaction in telemetry, and graceful fallbacks.Quality, performance, release
Testing: Jest + React Testing Library for units; Detox for critical E2E flows; snapshot tests for visual regressions.Performance: Hermes/Flipper profiling, bundle size budgets, frame-rate targets, network/memory discipline.Ops: Store submissions (App Store/Play), OTA, crash reporting/analytics (Sentry/Firebase), feature flags/experiments.Stewardship & collaboration
Keep small diffs, crisp PRs, and docs (setup scripts, architecture notes, "how to ship" playbooks).Partner with Product, Design, Back-end, and AI; mentor juniors; help interview the next mobile hire.Must-have experience
5-8+ years in mobile/front-end; 3+ years in React Native + TypeScript on production apps.Shipped and operated at least one RN app on both stores (release cadence, hotfixes, telemetry).Deep experience with state, navigation, testing (Jest/Detox), and performance (Hermes/Flipper).Strong REST API integration: typed clients, offline strategies, resilient error handling, analytics hooks.Comfortable with CI/CD, store processes, OTA updates, crash/analytics tooling.Strong plus
Experience shipping AI-adjacent flows (streaming/chat UIs, tool results, rate-limit states).Accessibility expertise (meaningful labels, focus management, dynamic type).Design systems/theming; localization; growth surfaces (onboarding, paywalls, referrals).Worked across US + India time zones; comfortable with fast, respectful feedback loops.How you work (what we actually value)
Owner's mindset: quality, performance, clarity-end to end.Craft + pragmatism: polish where it matters; ship small and often.Calm reliability: predictable releases, helpful alerts, boring incidents.Clear communication: tight specs, crisp PRs, thoughtful comments.Kind and direct: low ego, high bar, shared standards.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.