Senior Backend .NET Engineer

●

4 hours ago

Greece, Attiki, Athens, 118 55

Full Time

Senior

Hybrid

Basic Information

Horizon365 is seeking an experienced Senior Backend .NET Engineer to design, develop, and evolve backend systems powering its enterprise SaaS products for HR, workforce management, and workplace operations. The role is hands-on, involves architectural contributions, and is based in Aigaleo, Athens on a hybrid basis.

Responsibilities

Build and maintain backend services and RESTful APIs using C# and .NET.
Develop efficient data access solutions and optimize SQL Server performance.
Design secure and scalable solutions following established engineering practices.
Troubleshoot complex issues and improve application performance.
Implement integrations with external systems and enterprise services.
Collaborate with engineers and product stakeholders throughout the development lifecycle.
Contribute to code reviews, technical discussions, and engineering best practices.

Requirements

.NET

.NET Core

.NET Framework

Active Directory

ADO.NET

Analysis

Analytical Skills

API Development

Architecture

Back-end Development

CI/CD

Data Migration

Database Design

Database Management

Design Strategy

Entity Framework

Git

Identity and Access Management (IAM)

Interpersonal Communication

Microservices

Microsoft Azure

Microsoft SQL Server

Problem solving

Project Scope Development

REST APIs

RESTful Web Services

Transact-SQL (T-SQL)

5+ years of professional experience in backend development with C# and .NET.
Strong experience building HTTP APIs / RESTful services.
Solid knowledge of SQL Server, T-SQL, and relational database design.
Hands-on experience with Entity Framework / EF Core.
Understanding of SOLID principles, Dependency Injection, layered architecture and Microservices.
Experience with authentication, authorization, error handling, and logging.
Confidence working with complex, existing codebases and multi-project solutions.
Familiarity with Git and collaborative development workflows.
Strong problem-solving skills and good communication in Greek and English.

Benefits

Continuous education

Private health insurance

Remote work options

Hybrid working model based at our offices in Aigaleo, Athens.
Competitive compensation package based on experience and expertise.
Ticket Restaurant meal vouchers (introduced after an initial period of employment).
Private health insurance (introduced after an initial period of employment).
The opportunity to work on established, evolving enterprise SaaS products.
A supportive, collaborative engineering environment.
Opportunities for professional growth and continuous learning.

Good to have

Advanced T-SQL, including stored procedures, indexing, transactions, and query optimization.
Familiarity with ADO.NET and stored-procedure-based data access.
Knowledge of Redis, distributed caching, and cache invalidation.
Experience with Microsoft Entra ID, Active Directory, SSO, and RBAC.
Background in multi-tenant SaaS or enterprise business applications.
Experience with background processing, notifications, and third-party integrations.
Familiarity with Azure services and IIS hosting.

Senior Backend .NET Engineer

Basic Information

Responsibilities

Requirements

Benefits

Good to have

About the company

About the company

Senior Backend .NET Engineer

Basic Information

Responsibilities

Requirements

Benefits

Good to have

About the company

About the company