Senior Full Stack Software Engineer

Senior Full Stack Software Engineer (LATAM Only) Arandu Studio & Tech • Guarulhos, Estado de São Paulo, BrazilDescrição da vagaSenior Full Stack Software EngineerLocation: Remote — Brazil/US time zones (EST ±3h) • Contract: International contractor, $35/hour • Language: English (fluent) • Reports to: CTO & Engineering team.About the roleVolatus is hiring a Senior Fullstack Engineer to own critical product work on a next-generation platform for fertility clinics and their patients.You will join as a founding engineer, shaping both the product and the technical direction in a category where better software directly improves patient outcomes.Tech contextFrontend: Next.js/React, Typescript, Tailwind CSSBackend: Node.js/TypeScript with a PostgreSQL core (schema design, authN,authZ, performance, transactions, triggers).Data & integrations: Third-party API integrations; performance profiling (e.g., Lighthouse).Quality: Unit, integration, and end-to-end tests; CI/CD.Collaboration: Work closely with our Head of Engineering, Principal Engineer, Product Designer, and CEO.What you will doBuild and ship end-to-end features across the Next.js frontend and Node/TypeScript backend.Model and tune Postgres schemas; ensure secure authN/authZ and strong performance.Integrate external APIs and improve app reliability and speed (including Lighthouse-driven improvements).Write reliable tests (unit/integration/e2e) and contribute to CI/CD workflows.Make pragmatic early-stage architectural decisions and raise the engineering bar.What you will bringProficiency with AI tools to accelerate development and quality.Strong production experience with Next.js/React, Node.js, and TypeScript.Tailwind & CSS mastery; responsive, accessible UI.PostgreSQL expertise (modeling, security/auth, performance, transactions, triggers).Integrations experience (third-party APIs) and solid testing practice (unit/integration/e2e).Portfolio or links to shipped projects/code.90-day outcomesIn your first 90 days, you will:Lead at least one significant feature from design to production, used by real clinics or internal teams.Improve a key part of the frontend experience (e.g., performance, usability, or design consistency) and document the standards for others.Own part of the backend or data model, including at least one meaningful performance or reliability improvement.Help define or refine testing and deployment practices so the team can ship faster and with more confidence.Nice to haveExperience building voice-controlled components / speech-to-text.Experience interacting with AI models from the web app.How we workRemote within EST ±3 hours preferred; open to other time zones if you can collaborate on US-friendly hours.Small, senior team with a strong bias toward action and ownership;Product-led culture: engineers are closely involved in discovery, trade-off discussions, and shaping the roadmap.Hiring processCoderpad Challenge (60 min)Intro chat (45 min) – mutual fit and role context.Technical deep-dive & Live testing – discuss systems you've built; pair on a focused problem (no whiteboard trivia).Team conversation – meet engineering + product leadership.References & offer.Volatus is an equal opportunity employer committed to building a diverse and inclusive team.#J-*****-Ljbffr