Home.Net Developer

.Net Developer

Full-time

Hybrid

Middle

Portugal

Description

Our client is building a multi-tenant integrations platform that connects invoice management software to a large catalog of ERP systems. The platform runs as SaaS on AWS and as an on-prem distribution at customer sites.
You’d join a small team where every contribution is visible. Senior engineers to pair with on the trickier surfaces, real ownership of your own features early on.

What you'll do:

Build vertical-slice features end-to-end: API contract, data model, business logic, validation, tests.
Implement new ERP integrations against the platform’s integration interface.
Contribute to the data flow that handles high-throughput document dispatch — observability, error handling, retry behavior.
Work on the Angular portal that backs many backend features.
Pair with senior engineers on the trickier surfaces (live module updates, multi-tenant resilience, GitOps rollout) and grow into owning them.

What we're looking for:

Solid technical foundations. You’ve built production .NET backends for two to four years — current ASP.NET Core, EF Core with code-first migrations, MediatR-style request handling, FluentValidation at the edge. You can take a feature from API contract to migration to handler to tests without needing it broken into sub-steps. You write tests with xUnit + Moq + FluentAssertions (and WireMock.Net when you need to fake HTTP) named after behavior, not implementation.
Async, concurrency, and PostgreSQL fundamentals.
Trade-off awareness, with room to grow
Communication and proactivity.
AI fluency. Agentic coding tools are a working part of how you build – drafting handlers, scaffolding features, reading unfamiliar code, accelerating boilerplate. You understand AI output needs validation: you run the tests, you read the diff, you don’t merge what you can’t explain.
Cross-stack curiosity. You’re comfortable in Angular, or willing to learn it fast – most backend work has a frontend counterpart in our Angular + NgRx portal.

Nice to have:

Prior exposure to multi-tenant SaaS.
Any experience with ERP integration, EDI, or e-invoicing.
Familiarity with observability tooling — structured logging, distributed tracing, Grafana-class dashboards.
AWS or Kubernetes basics.

How we work:

Code-first across the stack: migrations, GitOps, no manual production fixes.
Every change reviewed for security and multi-tenant safety before merge. This is where you’ll learn the platform’s nuances fast.
AI-augmented development as a baseline, validated rigorously – by tests, by review, by your own judgment.
Markdown-first documentation in version control.
Small team. Pairs with seniors. Ownership ramps quickly.