Senior .NET Developer

Algoteque; Łódź; Remote; PLN 180,000 - 260,000; Full time

Job summary

ALGOTEQUE is an IT consultancy that helps startups and large companies to create and deliver innovative technologies. Join the payment technology team at one of the largest banks in Poland, working on high-volume, 24/7 systems used by millions of customers daily.

This role is mainly remote with team meetings in the Łódź office twice a month; you will design and develop backend services in C# / .NET 8, build REST APIs, work with MS SQL, and integrate Kafka and IBM MQ.

Qualifications

• 5+ years of experience building backend solutions in C# with MS SQL.

Responsibilities

• Design and develop backend services in C# / .NET 8.

Skills

C# backend development

REST API design

Entity Framework

MS SQL

Web API

Docker

Kubernetes

Visual Studio

Git

Postman/Insomnia

Unit/integration tests

CI/CD processes

Kafka

IBM MQ

SSIS

Azure DevOps

Jenkins

TeamCity

SonarQube

Jira/Confluence

Tools

Docker

Kubernetes

MS SQL

Entity Framework

Web API

Visual Studio

Git

Postman

Insomnia

Kafka

IBM MQ

SSIS

Azure DevOps

Jenkins

TeamCity

SonarQube

Jira

Confluence

Bitbucket

Job description

ALGOTEQUE is an IT consultancy firm that helps startups, mid-sized and large corporations to create and deliver innovative technologies.
Our team has a successful track record in designing, developing, implementing, and integrating software solutions (AI, ML, BI, Web, Automation) for Telecom, Energy, Bank, Insurance, Pharma, Automotive, Industry, e-commerce. We deliver our services both in fixed-price and time-and-materials models, helping our customers achieve their business and IT strategies.

Le poste :

We're hiring: Senior .NET Developer (Backend) – Payment Technologies

Mainly remote | Team meetings in Łódź twice a month | B2B

Join the payment technology team at one of the largest banks in Poland and work on systems used by millions of customers every day: account-to-account transfers, payment cards and BLIK. These are high-volume, 24/7 systems where your work has a direct impact on millions of transactions.

Work model

• Mainly remote work
• The team meets in the Łódź office twice a month

What you'll do

• Design and develop backend services in C# / .NET 8
• Build and maintain REST APIs (ASP.NET Web API)
• Work with MS SQL databases (Entity Framework, query optimization, SSIS)
• Integrate systems using Kafka and IBM MQ
• Write unit, automated and end-to-end tests
• Collaborate with business stakeholders and external vendors
• Take care of code quality and contribute to CI/CD processes

What we expect

• 5+ years of experience building backend solutions in C# with MS SQL
• Strong knowledge of .NET 8, Entity Framework and Web API
• Hands-on experience with Docker and Kubernetes
• Experience with Visual Studio, Git and Postman / Insomnia
• Ability to write unit, automated and e2e tests
• Ease in navigating complex architecture and multiple services
• Independence, strong organization and a goal-oriented mindset
• Strong communication skills and curiosity in working with business and external vendors
• English at B1/ B2 level
• Polish at B2 level or higher
• Your own sole proprietorship (JDG) – B2B cooperation

Nice to have

• Kafka, IBM MQ
• KeyDB / Redis
• SSIS
• Azure DevOps, Jenkins, TeamCity
• SonarQube
• Jira, Confluence, Bitbucket

Interested?

Apply with your CV in English. We will contact selected candidates promptly to discuss the details, the recruitment process and formalities.