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Senior Full Stack Engineer

Senior Full Stack Engineer

Nxt AttorneySão Paulo, SP, São Paulo (microrregião); São Paulo (estado), BR
Há 12 dias
Descrição da vaga

Full-Stack Software Engineer (Agents & Rapid Prototyping)

Location : Remote (US-friendly hours) - Central Time Zone

Type : Full-time (founding / early engineer)

Team : Small, passionate, ego-free builders

Why this role

We’re hunting for product–market fit . That means we ship POCs fast, test hypotheses daily, and aren’t afraid to throw work away if the data says so. If you code for fun , ask “ why ” before “ how ,” and love turning messy problems into scrappy automation that actually saves people time—this is your playground.

So we're on the same page, Vibe-Coding is helpful to very quickly discuss feature requirements and expectations before we commit to a full build.

What you’ll do

  • Prototype at lightning speed : Build and ship POCs, internal tools, and production features in days—not weeks.
  • Work with LLMs & SLMs : Integrate, evaluate, and fine-tune models; design agentic workflows that reduce manual work.
  • Automate the boring stuff : Sniff out bottlenecks, redundancies, and paper cuts; replace them with lightweight automations.
  • Balance build vs. buy : Pragmatically choose off-the-shelf services vs. custom code; optimize for speed, cost, and learning.
  • Own the stack end-to-end : APIs, data models, frontends, deployments, instrumentation, and on-call for what you build.
  • Collaborate without ego : Pair with design, product, and GTM to clarify the “why,” define thin slices, and ship continuously.
  • Ruthlessly iterate : Be comfortable restarting weekly if needed; measure outcomes, not lines of code.

Outcomes (how we’ll measure success)

  • 2–3 prod-quality launches / month from idea → shipped.
  • Clear learning loops : each release produces measurable signal (conversion, retention, time-saved).
  • Automation ROI : hours saved / team / week; decreased cycle time; reduced ops tickets.
  • Agent impact : at least one agent in steady use by internal or pilot users within first 60 days.
  • You might be a fit if you

  • Have 4+ years building full-stack products (or equivalent portfolio / hacker track record).
  • Are fluent in a modern web stack (e.g., TypeScript / Node , Python , React / Next ; Postgres / Redis; REST / GraphQL).
  • Have shipped LLM / SLM features (tool use, RAG, function calling, evals, latency / cost tuning).
  • Can design simple, resilient backends; write clean, testable code; and deploy via CI / CD to a major cloud.
  • Love debugging with data : logs, traces, metrics; you instrument before you guess.
  • Communicate crisply, ask sharp questions, and default to action.
  • Thrive in ambiguity; you don’t need a JIRA novella to start building.
  • Nice to have

  • Vector DBs, embeddings, prompt / version management, offline evals.
  • Agent frameworks (e.g., OpenAI tools, LangGraph, custom planners / executors).
  • Queueing / event systems (e.g., Kafka, SQS), WebSockets, streaming.
  • Security and privacy basics (authn / z, secrets, PII handling).
  • Experience with low-cost scrappy stacks (Cloudflare, Fly.io, Supabase, Firebase).
  • Our stack (evolving)

  • FE : React / Next.js, Tailwind, tRPC / GraphQL
  • BE : Node / TypeScript and / or Python FastAPI
  • Data : Postgres, Redis / Upstash, optional vector store
  • Infra : Vercel / Fly.io / Cloudflare + Docker; CI / CD (GitHub Actions)
  • AI : OpenAI, Anthropic, local SLMs when useful; evaluation harness + prompt / version control
  • How we work

  • Learn >
  • Perfect : Ship thin slices, get signal, iterate.

  • Write it down : Short RFCs → prototype → user feedback within days.
  • Builder culture : No rockstars, no heroes—just ownership and curiosity.
  • Time-zone friendly : Async first; quick huddles when needed.
  • Interview flow

  • Intro chat (30 min) : goals, mindset, what great looks like.
  • Builder exercise (home or live, 2–4 hrs) : ship a tiny agent or automation; explain trade-offs.
  • Technical deep dive (60 min) : architecture, data modeling, reliability, AI evals / cost.
  • Team fit (30 min) : collaboration, feedback loops, “why before what.”
  • Compensation

    Competitive salary + meaningful equity. We optimize for ownership and impact .

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    Senior Stack Engineer • São Paulo, SP, São Paulo (microrregião); São Paulo (estado), BR

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