Senior Software Developer – C#, .NET

alphacoders

. Develop modern software solutions using C# and .NET Core / .NET 10 .

Posted 10/6/2026full-timeFrankfurt am Main • GermanySenior💰 €65,000 - €75,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing modern software solutions using C# and .NET Core, with a strong focus on high-performance REST APIs and microservices. Proficient in applying Clean Code and SOLID principles to ensure software quality in complex, regulated environments.

Highest-signal resume keywords

C#/.NET Core DevelopmentREST API DevelopmentMicroservices ArchitectureClean Code and SOLID PrinciplesAgile Methodologies (Scrum)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NET Core.NET 10REST APIsMicroservicesMS SQLOraclePostgreSQLCode ReviewsTesting

Soft Skills

Strong Willingness to LearnEnthusiasm for Technical Mentoring

Tools & Technologies

ContainersCI/CD Processes

Industry Keywords

Service-Oriented ArchitectureDistributed SystemsSoftware ModernizationEnterprise ProductsTechnical Sparring

Tech Stack

Tools & technologies

MicroservicesOraclePostgresSQL.NET

About the role

Key responsibilities & impact

Develop modern software solutions using C# and .NET Core / .NET 10
Develop high-performance REST APIs in service-oriented architectures and microservice environments
Contribute to enterprise products that have been developed and maintained over the long term in a complex, highly regulated domain
Support the modernization of existing software landscapes
Ensure high software quality through Clean Code, SOLID principles, testing, and code reviews
Contribute new ideas, best practices, and technical improvements
Engage in technical sparring with other Senior Engineers
Contribute to architecture and design decisions
Design modern software architectures within the .NET ecosystem
Implement complex solutions in compliance with modern coding principles

Requirements

What you’ll need

Solid professional experience in software development
Experience with complex, distributed systems in the .NET environment
In-depth knowledge of C#/.NET Core (.NET 10)
Experience with REST APIs and microservices
Proficiency with relational databases: MS SQL, Oracle, and PostgreSQL
Knowledge of Clean Code and SOLID principles
Experience with agile methodologies such as Scrum
Experience with code reviews and testing
Ideally, experience with containers and CI/CD processes
Fluent in German and English
Strong willingness to learn and enthusiasm for technical mentoring

Benefits

Comp & perks

Strong remote-work culture and flexible working hours
30 days of annual leave, increasing with your length of service
Attractive corporate benefits
Company bonus scheme
Individually tailored professional development programs
Free parking
EV charging stations directly on-site
Company bike leasing
Regular team and company events
Modern work café
In-house yoga