About Sierra StudioWhen you apply to Sierra, you join an ecosystem. We connect highly vetted Brazilian talent with growing US companies and work closely with our partners to ensure strong alignment on expectations, culture, and technical bar.About our hiring partnerOur hiring partner started in early 2022 to solve a critical operational problem in the returns processing space.While most innovation focused on making returns easier for consumers, this created more returns without fixing the challenges inside warehouses. Operators were relying on pen and paper, whiteboards, and spreadsheets to process returned items — a clear opportunity for a more reliable, scalable system.Today, the company supports dozens of logistics providers across multiple facilities, serves hundreds of brands, and has achieved exceptionally low churn and strong user satisfaction. They are preparing for a Series A round later this year.The RoleWe are hiring a Senior Backend Engineer to help unblock feature development and scale a production system that already handles real volume.This is a hands-on role focused on backend development — not an architect-only position. You’ll work across different backend areas, contributing directly to feature delivery, performance improvements, and integrations.ResponsibilitiesDevelop and maintain backend services primarily written in GoBuild and evolve REST APIs consumed by web and mobile applicationsWork with Postgres, including query performance and data modelingContribute to feature development across different backend domains (core services and backend-for-frontend)Improve system performance and reliability, especially ahead of peak usage periodsBuild and maintain automated testsCollaborate closely with product and engineering in a two-week sprint cadencePick up tickets independently and move work forward with minimal oversightRequirementsSenior-level backend experience (typically 5+ years; more is welcome)Strong experience with server-side developmentGo experience preferred, but not mandatory for exceptional engineers coming from other backend languages (Java, Python, etc.)Solid understanding of REST APIs and relational databases (Postgres)Comfortable working in a startup environment with evolving requirementsAbility to work autonomously, communicate clearly, and ask for help when neededBias toward action and ownershipPrevious experience in startup or fast-paced product teams is highly valuedNice to Have (Not Required)Prior experience working with Go in productionFamiliarity with cloud environments (GCP or similar)Experience improving performance in existing systemsWhat We OfferCompetitive senior-level salary (flexible for exceptional candidates)EquityHealthcare allowanceWork-from-home setup stipendUnlimited vacation (minimum 2 weeks encouraged)Company off-sites twice a year100% remote work environmentA highly collaborative, low-ego engineering cultureThe opportunity to work on systems that impact real-world operationsWhy JoinWork on a backend that already matters — not a greenfield experimentJoin a technically strong, emotionally intelligent teamBuild systems that must perform under real operational constraintsBe part of a company with strong growth, low churn, and high user trustEnjoy a remote culture that values focus, trust, and sustainability