Senior Full Stack (.NET) Engineer

Salary range: B2B - 39-44 + VAT 💰

Ciklum is looking for a Senior Full Stack 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 Full Stack Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.

Client for this project is a leading global provider of audit and assurance, consulting, financial advisory, risk advisory, tax, and related services. We are developing an innovative automation platform for the client. It is a globally operating, complex system that is built to enhance and unify the process of collecting, processing and providing Tax and Financial services. The platform is actively used on a daily basis and the team continues to add new features that automate the business flows.Built from the ground up on a fresh codebase, we have been actively developing it. There is no legacy code, and we use the ultra-modern technology stack.

Responsibilities:

• Participate in requirements analysis and translate business needs into scalable technical designs and architectures

• Collaborate with US and vendor teams to produce software design and architecture for enterprise applications

• Write clean, scalable, maintainable code using C#, .NET Core, ASP.NET Core Web API, Entity Framework, and SQL Server

• Develop Angular 11+ front-end applications with TypeScript, HTML5, CSS3, applying component architecture and design patterns 

• Participate in pull request code review processes and provide constructive feedback to team members

• Test, deploy, and monitor applications and systems across development, staging, and production environments

• Revise, update, refactor, and debug code across the full stack to maintain high-quality, low-defect releases

• Develop, support, and maintain applications and technology solutions, ensuring they meet or exceed client expectations in scope, functionality, and time 

• Become familiar with all development tools, testing frameworks (NUnit), methodologies, and Agile processes

• Demonstrate a strong understanding of best industry standards in software development, version control (Git), and architectural patterns (DDD, SOLID, microservices)

• Ensure quality and low bug rates of code released into production through rigorous testing (BDD) and performance tuning

• Work on Agile projects, participate in daily Scrum calls, and provide task updates to cross-functional teams

• Collaborate with on-shore and off-shore team members, and work staggered shifts as needed to overlap with US teams and project deliveries

Requirements:

• 5+ years of experience in commercial software development with a focus on backend technologies

• Excellent knowledge of computer science and computing theory, including:

• OOP, DDD, SOLID, TDD, BDD principles 

• Database theory (RDBMS, NoSQL) 

• Algorithms and data structures

• Design, architectural, and enterprise patterns 

• Understanding of network protocols and conventions (HTTP, REST), authentication and authorization flows (OAuth, JWT, SAML) 

• Excellent knowledge and commercial experience with C# and .NET, including:

• .NET Core, ASP.NET (Core, MVC, Web API) 

• ORM frameworks (Entity Framework, Dapper) 

• RDBMS, especially SQL Server 

• Messaging systems (Azure Service Bus) 

• Cloud providers, especially Microsoft Azure 

• Testing frameworks (NUnit) 

• Web servers and deployment pipelines 

• Version control systems (Git) 

• 2+ years of hands-on experience with Angular 11+ component architecture, applying design patterns and best practices

• Experience with Angular State management (NgXs)

• Hands-on experience with Kendo UI, Angular Material, or SpreadJS libraries

• Experience with NoSQL databases (MongoDB)

• Knowledge of key-value storages (Redis, Memcached)

• Basic knowledge of containerization and orchestration (Docker, Kubernetes)

• Upper-intermediate English or above for effective communication with US counterparts and distributed teams

Desirable:

• Experience with Search Engines (ElasticSearch, Azure Search)

• Experience with REST API development for mobile applications

• Experience with integration with 3rd party solutions and external services

• Exposure to micro-frontend architecture

• Knowledge of Yarn, Webpack, MongoDB, NPM, Azure DevOps Build/Release configuration

• Experience with SignalR, ASP.NET Core, and WebSockets for real-time communication. Willingness to work extra hours to meet deliverables and ensure project success

• Exposure to Application Insights & Adobe Analytics for monitoring and telemetry

• Understanding of cloud infrastructure design and implementation (Azure, AWS)

• Experience in CI/CD configuration and DevOps practices (Azure DevOps, Terraform)

• Good knowledge of data analysis in enterprises

• Experience with Databricks, Snowflake, or MS Fabric as data platforms

• Exposure to Docker configurations and Kubernetes orchestration for containerized deployments

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.