Senior .NET Engineer

Ciklum is looking for a Senior .NET Engineer to join our team full-time in Poland.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About the role:

As a Senior .NET Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Together, we will work on the project for a fast-growing, profitable, well-funded and dynamic global payments company serving thousands of corporates and millions of end-users in over 200 countries. You will be a part of the Money Movement team.

Responsibilities:

• Back-end development to meet customer’s business needs and implement components according to modern microservice architecture

• Taking part in the decision-making process in application architecture, solution development, architecture and code review

• Develop and review feature design documents and provide inputs and updates to solution specifications

• Design and implement various types of tests including unit, integration, and functional tests

• Proactive contribution to solution development and process improvements

• Working in an international distributed team in an Agile environment

• Communicate with PMs, engineers, architects, QA, and other stakeholders

• Deliver product roadmap and planning activities

• Use high coding standards and software best practices to deliver highly testable, automatable, and performant code across the SDLC

Requirements:

• More than 5 years of experience in software development

• Excellent knowledge of clean code practices, OOP, and OOD

• Strong knowledge of programming paradigms and principles including OOP, SOLID, DDD, TDD, and BDD

• Strong understanding of database theory including RDBMS and NoSQL

• Strong knowledge of code testing practices

• Strong understanding of algorithms and data structures

• Strong understanding of architectural, enterprise, and design patterns

• Strong understanding of security patterns, reverse engineering resistance, and common attack types including OWASP

• Strong understanding of network interactions including protocols, REST and RPC conventions, authentication and authorization flows, and standards such as OAuth and JWT

• Excellent knowledge and hands-on experience in C# and .NET

• Hands-on experience with REST API development

• Hands-on experience with .NET Framework, .NET Core, and ASP.NET (Core, MVC, WebAPI)

• More than 2 years of experience with testing frameworks such as NUnit, xUnit, and MSTest

• Experience with ORM tools such as Entity Framework and Dapper

• Experience with RDBMS such as SQL Server, MySQL/MariaDB, and PostgreSQL

• Strong experience with key-value storages such as Redis

• Experience with messaging systems such as RabbitMQ, Azure Service Bus, Apache Kafka, ActiveMQ, AWS SQS, and Google Pub/Sub

• Experience with web servers

• Experience with version control systems such as GIT

• Experience with Continuous Integration tools such as GitLab Pipeline, Jenkins, and Azure DevOps

• Experience with builders

• Experience with NoSQL databases such as MongoDB, Elasticsearch, and CouchDB

• Experience with troubleshooting, profiling, and debugging applications

What`s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door environment

• Growth focus: Take on large-scale projects with a global impact and expand your expertise

• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications

• Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies

• Flexibility: Enjoy flexibility – full remote working possibilities

• Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations

About us:

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.
With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.

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Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.