# Backend Developer at Pro4all

> Location unclear · Unspecified · Backend · open. Source: https://alderhq.app/jobs/personio%3Apro4all%3A2844494 (read 2026-11-09).

## Facts (observed)

- Company: [Pro4all](https://alderhq.app/companies/pro4all)
- Location text: Woerden
- Where it can be done from (inferred): Location unclear (evidence: "Location: Woerden")
- Posted: 2026-10-15 (25 days ago)
- First seen by alder: 2026-11-04 · last verified: 2026-11-08
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://pro4all.jobs.personio.de/job/2844494
- Skills listed (inferred): C#/.NET, PostgreSQL, Azure, Kubernetes

## Pay and sponsorship

- Posted pay: not posted

## Description (the employer's text)

### Your mission

- Design and develop backend and middleware components in C# and .NET, including secure REST APIs and automation for internal and external integrations.
- Build testable, scalable, and robust software, supported by established architectural patterns and unit and integration tests.
- Keep services reliable and problems traceable with structured logging, distributed tracing, and health checks.
- Help partners and customers work through backend integration challenges.
### Your profile

Your technical experience includes:

- Data and architecture: strong experience with PostgreSQL or other relational databases, a solid understanding of CQRS, publisher/subscriber, factory, and other design patterns, plus familiarity with dependency injection and modular service architecture.
- APIs and security: secure API design with JWT, OpenID Connect, and authentication middleware, alongside practical experience with Swagger/OpenAPI, Polly, and Git.
- Cloud and messaging: deploying and operating containerized services with Kubernetes, working with Azure Service Bus or similar messaging solutions, and working knowledge of cloud platforms, especially Azure.
- Observability: familiarity with Datadog, Serilog, OpenTracing, and related tools.
### Why us?

- A good salary, a company laptop, and travel expense reimbursement.
- 25 vacation days and 8% holiday allowance.
- Time to exercise during working hours and delicious lunches at the office every day.
You’ll work in a beautiful office that’s easy to reach by public transport and car. There’s also plenty happening outside the work itself, with regular drinks, snacks, and activities such as paddleboarding, karting, and padel.

### Interesse?

No API call required. A regular phone call will do.

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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/personio%3Apro4all%3A2844494 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.