ultima milla logo
ultima milla

Logistic Management System for E-commerce & Retail in Mexico. Raised +$7M USD from Y Combinator, FJLabs, & more.

Senior Fullstack Developer

Full-stack EngineerSoftware EngineerFull TimeRemoteSeniorTeam 51-200H1B No SponsorCompany SiteLinkedIn

Location

Brazil

Posted

30 days ago

Salary

0

Seniority

Senior

Job Description

Senior Fullstack Developer

ultima milla

• Design, develop, and evolve RESTful APIs using .NET 8+ and ASP.NET Core, focusing on performance, scalability, and sound architectural practices • Work in full-stack development, also contributing to component-based frontend development (React, Vue, or similar) • Build and maintain integrations with external platforms (e-commerce, marketplaces, and logistics partners) using REST, GraphQL, and OAuth 2.0 • Implement resilient flows using messaging (e.g., queues, retries, idempotency, circuit breaker) • Work end-to-end, from technical design to production deployment (Docker and cloud environments) • Investigate critical incidents, perform advanced troubleshooting, and drive root-cause analysis • Ensure system observability (APM, structured logs, and metrics) to support operations • Actively contribute to architecture decisions, evaluating technical trade-offs and business impact • Write and maintain automated tests (unit and integration) as part of development • Participate in code reviews, promoting quality, standards, and the team’s technical growth • Document APIs and technical flows (OpenAPI/Swagger, diagrams, changelogs)

Job Requirements

  • Strong experience with .NET (C#) and ASP.NET Core
  • Experience with full-stack development (React, Vue, or similar)
  • Solid experience designing and consuming RESTful APIs
  • Experience with relational databases (SQL Server) and data modeling
  • Hands-on knowledge of messaging and asynchronous systems (e.g., SQS, RabbitMQ, or similar)
  • Experience with automated testing (xUnit, Moq, or similar)
  • Experience with cloud platforms (preferably AWS: S3, SQS, Lambda, or equivalents)
  • Experience with containers (Docker)
  • Knowledge of observability tools (Datadog, Grafana, New Relic, or similar)
  • Experience with authentication/authorization (OAuth 2.0, JWT)
  • Knowledge of CI/CD and DevOps practices
  • Proficiency with Git and versioning strategies
  • Ability to make technical decisions autonomously
  • Critical mindset regarding architecture and code quality
  • Good communication with technical and non-technical teams
  • Proactive approach to solving complex problems
  • Ownership of the work you develop

Benefits

  • Work model: 100% remote
  • International environment

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