Senior .NET / C# Developer

GeekSoft Consulting; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

International consulting culture

Dutch benefits package

Job summary

GeekSoft Consulting in Amsterdam, Netherlands is seeking an experienced Senior C#/.NET Engineer to design, build and continuously improve the client’s online platform. You will collaborate across REST APIs, microservices and cloud-native Azure solutions, translating business needs into scalable software.

This fixed-term contract offers a challenging, impactful role in a multinational consulting environment where you can mentor juniors and shape engineering practices while ensuring security and

Qualifications

• 8+ years of hands-on C#/.NET development.
• 5+ years of experience with .NET Core and Azure.
• 3+ years of experience in Banking, Lending, or Credit domain projects is mandatory.
• Strong hands-on experience in REST APIs and Microservices.
• Design, develop, and maintain enterprise applications using C#, .NET Core/.NET 8, ASP.NET Core, Web API, Entity Framework, and LINQ.
• Build scalable microservices and RESTful APIs supporting loan origination, credit processing, customer onboarding, and payment platforms.
• Develop and implement cloud-native solutions on Microsoft Azure.
• Collaborate with Architects, Business Analysts, Product Owners, and stakeholders to translate business requirements into technical solutions.
• Ensure applications meet banking security, governance, audit, and regulatory standards.
• Perform application troubleshooting, debugging, performance tuning, and production support.
• Lead code reviews, mentor developers, and promote engineering best practices.
• Support CI/CD, Azure DevOps, and DevOps automation practices.
• Strong expertise in ASP.NET Core, Web API/REST, Entity Framework/EF Core, and LINQ.
• Strong experience with Microservices architecture.
• Hands-on experience with SQL Server, stored procedures, database design, and query optimization.
• Experience with Git, CI/CD, and Azure DevOps Pipelines.
• Docker/Kubernetes experience is an advantage.
• Experience with Commercial Banking, Retail Banking, Corporate Banking, lending, credit processing, or financial services platforms.
• Exposure to messaging technologies such as Azure Service Bus, RabbitMQ, or Kafka is preferred.

Responsibilities

• Help design, build and continuously improve the clients online platform.
• Research, suggest and implement new technology solutions following best practices/standards.
• Take responsibility for the resiliency and availability of different products.
• Be a productive member of the team.

Skills

C#/.NET development

REST APIs

Microservices

ASP.NET Core

Entity Framework

LINQ

SQL Server

Azure

DevOps

Docker/Kubernetes

Code reviews

Security & regulatory

Azure DevOps Pipelines

Git

Kafka/RabbitMQ

Tools

Azure DevOps

Git

Docker

Kubernetes

Job description

GeekSoft Consulting | Fixed Term Employment

Amsterdam, Netherlands | Posted on 09/03/2026

• Help design, build and continuously improve the clients online platform.
• Research, suggest and implement new technology solutions following best practices/standards.
• Take responsibility for the resiliency and availability of different products.
• Be a productive member of the team.

Requirements

• 8+ years of hands‑on C#/.NET development.
• 5+ years of experience with .NET Core and Azure.
• 3+ years of experience in Banking, Lending, or Credit domain projects is mandatory.
• Strong hands‑on experience in REST APIs and Microservices.
• Design, develop, and maintain enterprise applications using C#, .NET Core/.NET 8, ASP.NET Core, Web API, Entity Framework, and LINQ.
• Build scalable microservices and RESTful APIs supporting loan origination, credit processing, customer onboarding, and payment platforms.
• Develop and implement cloud‑native solutions on Microsoft Azure.
• Collaborate with Architects, Business Analysts, Product Owners, and stakeholders to translate business requirements into technical solutions.
• Ensure applications meet banking security, governance, audit, and regulatory standards.
• Perform application troubleshooting, debugging, performance tuning, and production support.
• Lead code reviews, mentor developers, and promote engineering best practices.
• Support CI/CD, Azure DevOps, and DevOps automation practices.
• Strong expertise in ASP.NET Core, Web API/REST, Entity Framework/EF Core, and LINQ.
• Strong experience with Microservices architecture.
• Hands‑on experience with SQL Server, stored procedures, database design, and query optimization.
• Experience with Git, CI/CD, and Azure DevOps Pipelines.
• Docker/Kubernetes experience is an advantage.
• Experience with Commercial Banking, Retail Banking, Corporate Banking, lending, credit processing, or financial services platforms.
• Exposure to messaging technologies such as Azure Service Bus, RabbitMQ, or Kafka is preferred.

Fixed Term Employment Contract

Work-Life Balance

Flexible Work Mode

What GeekSoft Consulting Offers

• International, collaborative consulting culture with clear career development paths.
• Comprehensive Dutch benefits package emphasizing well-being, mobility, and career growth.