.NET Software Engineer

Site; United States; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Flexible engagement model

Global IT talent

Modern tech stacks

Security compliance

People-first culture

23 days PTO

Job summary

TEAM International Services in Spain is seeking a Backend Engineer to join our banking platform team. You will build production-grade backend services in C# / .NET, focusing on correctness, reliability, auditability, and maintainability.

The role involves designing APIs, working with SQL databases, applying clean architecture, and writing unit and integration tests. You will collaborate across product, operations, QA, and other engineers to deliver reliable financial solutions.

Qualifications

• Solid C# / .NET backend experience.
• Good understanding of REST APIs, SQL, and service-based architecture.
• Experience with testing, CI/CD, and code reviews.
• Awareness of messaging, retries, idempotency, concurrency, and transactional boundaries.
• Ability to reason through ambiguous requirements and identify edge cases.
• Strong ownership mindset: you care about what happens after the code is deployed.
• Experience with RabbitMQ, Redis, Azure/AWS, Docker, observability tools, or financial systems is a plus.

Responsibilities

• Build and maintain backend services using C#, .NET, and ASP.NET Core.
• Design APIs, background workers, and message-driven workflows.
• Work with SQL databases, Entity Framework, and performance-sensitive data access.
• Apply clean architecture principles across use cases, domain logic, repositories, and infrastructure.
• Write meaningful unit and integration tests.
• Support production systems with good logging, monitoring, and failure handling.
• Collaborate with product, operations, QA, and other engineers to clarify requirements and deliver reliable solutions.

Skills

C# / .NET

REST APIs

SQL

Service-based architecture

Testing

CI/CD

Code reviews

Messaging

Retries

Idempotency

Concurrency

Transactions

Edge cases

Ownership

RabbitMQ

Redis

Azure/AWS

Docker

Observability

Financial systems

Tools

Docker

RabbitMQ

Redis

Azure

AWS

Job description

We're a global IT consulting company and a software development service provider that helps organizations operate at their best. With 30+ years of experience, +6 Global locations, and +1000 employees, TEAM combines technology expertise, valuable insights, business intelligence, and a client-centered approach to address challenges in business operations, digital transformation, risk management, compliance, business continuity, and more.

Our client is a technology company for the art market

We are looking for a Backend Engineer to join our banking platform team.

You will build production-grade backend services in C# / .NET, working on financial product flows where correctness, reliability, auditability, and maintainability matter.

This role is for someone who can do more than complete tickets. We want an engineer who understands the product context, asks good questions, owns their work end-to-end, and can make sensible technical decisions without needing every detail spelled out.

What you’ll do

• Build and maintain backend services using C#, .NET, and ASP.NET Core.
• Design APIs, background workers, and message-driven workflows.
• Work with SQL databases, Entity Framework, and performance-sensitive data access.
• Apply clean architecture principles across use cases, domain logic, repositories, and infrastructure.
• Write meaningful unit and integration tests.
• Support production systems with good logging, monitoring, and failure handling.
• Collaborate with product, operations, QA, and other engineers to clarify requirements and deliver reliable solutions.

What we’re looking for

• Solid C# / .NET backend experience.
• Good understanding of REST APIs, SQL, and service-based architecture.
• Experience with testing, CI/CD, and code reviews.
• Awareness of messaging, retries, idempotency, concurrency, and transactional boundaries.
• Ability to reason through ambiguous requirements and identify edge cases.
• Strong ownership mindset: you care about what happens after the code is deployed.
• Experience with RabbitMQ, Redis, Azure/AWS, Docker, observability tools, or financial systems is a plus.

Good fit if you

• Ask “what problem are we solving?” before jumping into code.
• Think about business rules, failure modes, auditability, and supportability.
• Keep code clean, testable, and maintainable.
• Challenge unclear or risky requirements constructively.
• Can own a backend module or feature from design to production.
• Have a background with banking/finance/payments domains

What We Offer

At TEAM International, you’ll have the opportunity to work on impactful projects alongside top professionals, collaborate with international clients, and leverage the latest technologies.

Work with global IT talent in a flexible engagement model

Be part of challenging, high-impact projects with modern tech stacks

Full compliance with security and regulatory standards

A supportive, collaborative, and people-first environment

23 days of paid time off per year, plus paid public holidays