Senior C#/.NET Backend Engineer - Anti-Fraud & Modernization

QUANTEAM (RAINBOW PARTNERS Group); Porto; On-site; EUR 65,000 - 90,000; Full time

Benefits offered by this job

Health insurance

Extra holiday: Christmas Eve or New Y'

Access to Quanteam Academy

Elevate Program

Consultant Expert support

Job summary

Quanteam, founding entity of RAINBOW PARTNERS, is a consulting firm focused on Banking and Financial Services. We are seeking a Senior C#/.NET Backend Developer – Anti-Fraud based in Porto to design and implement backend solutions for fraud monitoring and trading controls.

The role involves modernization, data processing workflows, and secure software practices within an Agile team. The position offers a permanent CTI contract, health insurance, extra holidays, and access to Quanteam Academy for

Qualifications

• 6–9 years of backend development experience.
• Strong proficiency in C#, .NET and .NET Framework.
• Advanced SQL skills, including stored procedures and views.
• English B2 level or above, Porto-based.
• Experience with Agile and DevSecOps practices.

Responsibilities

• Develop and maintain backend applications for anti-fraud monitoring.
• Design robust, scalable solutions in C#/.NET.
• Modernize legacy systems and upgrade architectures.
• Collaborate with stakeholders in an Agile environment.

Skills

Backend development

C# / .NET

SQL & DB design

RESTful APIs

SOLID principles

Agile methods

DevSecOps

English (B2+)

Tools

SQL Server

Job description

Quanteam, founding entity of RAINBOW PARTNERS, is a consulting firm focused on Banking and Financial Services. We are seeking a Senior C#/.NET Backend Developer – Anti-Fraud based in Porto to design and implement backend solutions for fraud monitoring and trading controls.

The role involves modernization, data processing workflows, and secure software practices within an Agile team. The position offers a permanent CTI contract, health insurance, extra holidays, and access to Quanteam Academy for