Senior Full Stack .NET Developer

PROJECT INFORMATION:

Industry: Banking

Client: A company from Sweden / start-up environment

Remote work: 100%

Project language: English

Business trips: Occasionally to Sweden, maybe one per year

Project length: 12 months contracts + prolongations

Start: ASAP / Flexible - we are focused on finding the best candidate

Assignment type: B2B

Remuneration: 35-45 EUR/h

Localization in the organization: this consultant will be a part of a Core Development Team of 9 Full Stack Developers.

The first challange and focus: on the customer service backoffice application (greenfield).

Introduction & Summary

We are seeking a Senior Full-stack developer with experience building scalable and secure backend services and clean, user-friendly frontend applications. Experienced working with microservices, designing API’s and working across a range of different serverless databases. Skilled at writing clean and testable code, particularly with .NET 9/10, microservices, AWS (hybrid and serverless) and modern authentication mechanisms. A strong understanding of database optimizations and API design is essential for this role, along with the ability to deliver responsive user interfaces and robust backend services.

Main Responsibilities

The main duties of the Senior Full Stack .NET Developer include:

• Develop backend microservices in .NET and frontend applications in Vue.

• Design API’s and user facing applications.

• Build and maintain end-to-end BDD integration tests.

• Optimize database access using Entity Framework Core.

• Assist the rotating support schedule by reviewing logs, troubleshooting production issues and communicating findings with stakeholders.

Key Requirements:

Backend Skills

• Modern .NET/C# – Developing high-performance backend services and APIs in .NET 8 and 10

• Entity Framework (EF Core) – ORM for data modeling, LINQ queries, migrations, and database optimization

• gRPC Services – Implementing high-throughput, low-latency communication between distributed services

Frontend Skills

• JavaScript/TypeScript – Experience building SPAs with Vue.js

• API Integration – Consuming REST and gRPC services

Database & Cloud

• Relational Databases – Serverless MySQL (Aurora) with EF Core

• NoSQL - DynamoDB

• Cloud Platforms – AWS deployment, containerization with Docker & Kubernetes

• Distributed queues – SQS and SNS

Other Technical Skills

• Version Control: Git / GitLab

• CI/CD Pipelines: GitLab , Octopus

• Testing: Integration- and unit testing in .NET,

• Agile/Scrum methodology

Nice to haves

• Node.js / Express – Building RESTful APIs, middleware, and microservices

• Authentication & Authorization – Experience with OAuth2, OpenID Connect, JWT, IdentityServer

• BDD-testing using Gherkin and .NET