Senior Full-Stack Engineer

Improving South America; Buenos Aires; Remote; ARS 181,672,000 - 242,230,000; Full time

Benefits offered by this job

USD-based pay

Flexible remote/office options

Professional growth opportunities

Job summary

Improving South America is seeking a Senior Full Stack Engineer to deliver production software across .NET, TypeScript, and Azure using an agentic-first engineering workflow. The role emphasizes end-to-end delivery with AI agents and rigorous verification, while ensuring security and compliance for protected health information.

You will own feature delivery from planning to validation, collaborate with stakeholders across time zones (US Eastern overlap required), and drive V1 releases with a

Qualifications

• 4+ years of experience as a software engineer.
• Recent production experience with .NET 8 or 9, C#, ASP.NET Core Web API, Entity Framework Core, and PostgreSQL.
• Recent experience with TypeScript, Azure, and full end-to-end delivery with coding agents and rigorous verification.
• Strong Azure experience, including production deployment and operational ownership.
• Proven use of Claude Code or equivalent agentic tools for meaningful end-to-end feature delivery, not only autocomplete.
• Advanced AI-native engineering capability with multi-agent workflows, memory/context strategies, and tool harnesses.
• Ability to translate product objectives into executable agent work and verify output through builds/tests.
• Demonstrated senior product acumen with balanced self-directed investigation and stakeholder alignment.

Responsibilities

• Deliver production features across .NET, C#, React, TypeScript, and Azure using an agentic-first workflow.
• Prioritize V1 delivery, assigned work, and UAT readiness before optimization.
• Turn incomplete directions into actionable delivery plans and keep work moving.
• Align with stakeholders early when requirements conflict.
• Direct AI agents through planning, implementation, testing, and validation.
• Review and verify generated work rigorously before deployment.
• Build and maintain backend services, APIs, and portal experiences.
• Preserve security, tenant isolation, encryption, and least privilege access for PHI.

Skills

Full stack engineering

C# .NET

TypeScript

Azure

Agentic workflows

AI-native engineering

Multi-tenant SaaS

Testing & verification

Security & compliance

English (upper-intermediate)

Tools

Claude Code

Azure DevOps

PostgreSQL

Entity Framework Core

React

ASP.NET Core Web API

Job description

ABOUT THE ROLE

• Senior Full Stack Engineer: deliver production software across .NET, TypeScript, and Azure using an agentic-first engineering workflow.

MUST HAVES

• 4+ years of experience working as a software engineer
• Recent production experience with .NET 8 or 9, C#, ASP.NET Core Web API, Entity Framework Core, and PostgreSQL.
• Recent experience with TypeScript, Azure, and real end-to-end delivery with coding agents and rigorous verification. Prompting alone is not enough.
• Strong Azure experience, including production deployment and operational ownership.
• Proven use of Claude Code or equivalent agentic tools for meaningful end-to-end feature delivery, not only autocomplete or isolated prompting.
• Advanced AI-native engineering capability, including strong judgment about when and how to use AI agents, coding tools, skills, harnesses, MCP integrations, memory/context strategies, and multi-agent workflows. Must be able to select the right approach for the problem, recognize when an agent is failing or over-engineering, and intervene or change strategies appropriately.
• Demonstrated ability to deliver substantial production software primarily through agentic development rather than traditional manual code authoring, while applying senior engineering judgment to architecture, security, testing, verification, and product behavior.
• Ability to independently investigate unclear tickets, identify missing requirements and product edge cases, ask focused questions, and own feature delivery through tested, working completion without step-by-step direction.
• Ability to translate a product objective into executable agent work, coordinate multiple agents when useful, and verify generated output through builds, tests, runtime checks, and product behavior.
• Demonstrated senior product acumen, adaptability to evolving requirements, commitment to functional V1 releases without over-engineering, and sound judgment on balancing self-directed technical investigation with timely stakeholder alignment.
• Experience with multi-tenant SaaS, service boundaries, automated testing, delivery pipelines, and production validation.
• Strong communication, with early escalation of blockers and concise alignment on priorities and tradeoffs.
• Reliable United States Eastern Time overlap for a full time engagement.
• Ability to demonstrate the agentic workflow in a live AI coding exercise and explain tool selection, context management, failure handling, verification, and limitations.
• Upper-intermediate English level.

NICE TO HAVES

• Python and FastAPI production experience.
• Experience with AI service layers, RAG, vector stores, prompt evaluation, or document generation.
• Healthcare, HIPAA, financial services, or another regulated data environment.
• Azure Service Bus or another asynchronous and event driven messaging platform.
• Terraform, Azure Entra ID, Azure DevOps, and enterprise identity patterns.
• Experience with payer or Medicaid integrations, eligibility, prior authorization, or EDI 837 claims.
• Experience with feature governance systems such as LaunchDarkly or PostHog.

WHAT YOU WILL DO

• Deliver production features across .NET, C#, React, TypeScript, and Azure using an agentic-first engineering workflow.
• Prioritize functional V1 delivery, assigned work, and UAT or demo readiness before optional optimization or tooling work.
• Turn incomplete or changing product direction into a practical delivery plan and keep work moving without repeated resets.
• Align early with stakeholder when requirements, priorities, or product references conflict.
• Use the required AI Skill consistently, and route proposed workflow improvements without displacing committed delivery.
• Bring findings, focused questions, and proposed options—not just report insufficient information.
• Direct AI agents through planning, implementation, testing, debugging, and validation.
• Review and verify generated work rigorously rather than accepting agent output at face value.
• Build and maintain backend services, APIs, and portal experiences across the platform.
• Preserve security, auditability, tenant isolation, encryption, and least privilege access for protected health information.
• Make blockers, decisions, delivery risks, and next outcomes visible to the team.
• Require investigating ambiguity, validating assumptions with AI, proposing a practical plan, and owning implementation through tested completion.

PERKS AND BENEFITS

• Professional growth : Mentorship, TechTalks, and personalized growth roadmaps.
• Competitive compensation : USD-based pay with education, fitness, and team activity budgets.
• Exciting projects : Modern solutions with Fortune 500 and top product companies.
• Flextime : Flexible schedule with remote and office options.