Senior Full Stack Engineer

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.

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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.