ultima milla

Mid-Level Fullstack Developer

ultima milla

full-time

Posted on:

Location Type: Remote

Location: Brazil

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Tech Stack

ASP.NETGrafanaJavaScript.NETReactReact NativeSQLTypeScriptVue.js

About the role

  • Provide advanced technical support (N3), analyzing, diagnosing and resolving complex issues in web applications, .NET APIs, integrations and frontends.
  • Investigate critical incidents, perform advanced troubleshooting and propose permanent fixes to ensure stability.
  • Maintain production systems: monitoring, log analysis, performance and application behavior.
  • Collaborate with Engineering, Infrastructure and Data teams to reproduce scenarios, validate hypotheses and implement fixes/improvements.
  • Develop fixes, hotfixes and enhancements in the backend (.NET / SQL Server) and frontend (React Native, Vue.js within MVC).
  • Analyze, optimize and maintain stored procedures, views and SQL queries related to performance, incidents and integrations.
  • Support Product and Engineering in technical triage, providing insights on impact and feasibility.
  • Ensure technical quality by following best practices, conducting code reviews, writing unit tests and keeping documentation up to date.
  • Create and maintain documentation, incident playbooks, runbooks and support procedures.
  • Contribute to the evolution of the architecture by identifying failures, bottlenecks and opportunities for improvement.
  • Act as a technical reference for N1/N2 teams, providing guidance and knowledge transfer.

Requirements

  • Solid experience in advanced technical support (N3/SRE), working on analysis and resolution of complex incidents.
  • Proficiency in ASP.NET MVC, Web API and .NET Core for maintenance, fixes and service evolution.
  • Advanced knowledge of SQL Server: query optimization, creating stored procedures/views, performance analysis (locks, deadlocks, indexes, execution plans).
  • Experience with modern frontend technologies: React Native (fixes/adjustments) and Vue.js integrated with ASP.NET MVC, and strong command of JavaScript (ES6+) and TypeScript.
  • Experience with REST APIs: interception, error handling, logging, authentication and use of Swagger (contract-first).
  • Strong troubleshooting skills: log analysis, stack traces, profiling and reproducing complex scenarios.
  • Knowledge of observability and monitoring (Elastic/Kibana, Grafana, metrics and logs).
  • Experience with performance optimization on the frontend (re-renders, memoization, list rendering), backend (.NET profiling, GC), and database (indexing, tuning).
  • Experience with tracing and error analysis tools (Sentry, Datadog, New Relic, AppInsights).
  • Experience with micro-frontends, modularization and domain separation.
  • Familiarity with Git, CI/CD and deployment pipelines.
  • Ability to create technical documentation, runbooks and incident playbooks.
  • Contribution to platform resilience, incident reduction and continuous improvement.
  • Strong technical communication and collaboration with squads, infrastructure, product and N1/N2 levels.
Benefits
  • Work model: 100% remote
  • International environment
  • Contract type: PJ (contractor)
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
.NETASP.NET MVCWeb API.NET CoreSQL ServerReact NativeVue.jsJavaScriptTypeScriptREST APIs
Soft Skills
troubleshootingtechnical communicationcollaborationguidanceknowledge transferincident reductioncontinuous improvement