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.

Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn.

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.