Job
- Level
- Senior
- Job Field
- IT, DevOps, Back End
- Employment Type
- Full Time
- Contract Type
- Permanent employment
- Location
- Berlin
- Working Model
- Hybrid, Onsite
Job Summary
In this role, you will develop cloud-native microservices on Azure, build REST APIs, design complex CRM workflows, and implement resilient background processing. You will take ownership of core services and drive new engineering standards.
Job Technologies
Your role in the team
- Checkcars24 is looking for you as an expert Senior Software Developer (C# / .NET).
- We are looking for a Senior Software Developer (C# / .NET) to design, build, and evolve scalable cloud-native microservices on Microsoft Azure.
- You will work on a high-impact platform that manages the full lifecycle of automotive sales leads - from multi-channel ingestion (web, HubSpot, Meta, TikTok) through a complex 10-stage CRM workflow to customer feedback and analytics.
- This role involves working on systems with real financial implications, strict SLA requirements, and multiple external integrations.
- You will take ownership of core services, set engineering standards, and mentor other developers.
- Design and extend a complex 10-stage CRM workflow engine with state transitions and audit trails.
- Build and maintain .NET 7+/8 microservices on Azure.
- Develop and secure REST APIs (OAuth2, JWT, webhook HMAC validation).
- Integrate external systems (HubSpot, Microsoft Graph, Meta, TikTok, TrustPilot).
- Implement resilient background processing (queues, retries, idempotency, scheduling).
- Work with Azure services (Blob Storage, Queue Storage, Cosmos DB, App Service, Key Vault).
- Ensure system reliability using observability, logging, and performance monitoring.
- Maintain CI/CD pipelines and testing standards.
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Our expectations of you
Qualifications
- Starkes Verständnis von REST API-Design und Sicherheit.
- Background in clean architecture and domain-driven design.
- Ability to model complex business workflows into reliable state machines.
- Strong ownership of production systems and incident troubleshooting.
- Clear communication in English and German.
- Willingness to challenge technical risks and improve system design.
Experience
- Strong experience with C# / .NET 7+ (async/await, DI, ASP.NET Core).
- Hands-on experience with Azure cloud services.
- Experience with distributed systems (queues, retries, idempotency, concurrency).
- Experience with testing (xUnit, Moq) and CI/CD pipelines.
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What we offer
- Join a company where technology is becoming the core driver of the business.
- You will work on products that directly impact thousands of real customer interactions, building systems that solve meaningful, real-world problems at scale.
- Instead of maintaining legacy software or acting as an external service provider, you will own your products end-to-end and continuously evolve them.
- You will contribute to the architecture and development of modern, cloud-native platforms built on .NET and Azure.
- From distributed workflows and AI-supported processes to deep integrations with leading external providers, you will work on systems that are business-critical, highly reliable, and continuously evolving.
- We are in a phase of rapid growth and strong technological expansion.
- This creates real opportunities to influence architecture decisions, define engineering standards, and take ownership of initiatives that visibly shape the company's future direction.
- Our engineering culture embraces modern software practices, cloud infrastructure, automation, AI-driven solutions, and scalable system design.
- You will have the freedom to apply new technologies where they create real value, rather than being constrained by legacy systems.
- You will collaborate with partners at the forefront of AI and emerging technologies, gaining exposure to innovative engineering approaches and international technology ecosystems.
- Flexible working hours.
- Hybrid working model with one office day per week.
- A stable, long-term role in a growing, technology-driven company.
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Topics that you deal with on the job
Job Locations
This is your employer
CheckCars24 GmbH
CheckCars24 GmbH is a dynamic, owner-managed company in e-commerce specializing in vehicle trading. They enable digital car purchases and support their customers from vehicle selection to contract completion. The focus is on immediately available vehicles and a clear, pleasant purchasing process.
Description
- Company Type
- Established Company
- Industry
- Trade
Senior Software Developer - Scalable Mobility Platform
- Location
- Berlin
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
