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, you will become a part of a cross-functional development team, engineering experiences of tomorrow.

With almost 100 million active users across 25 countries, they're a global food tech company As a recently formed team, they have many opportunities and ideas for sharing value back to the customers within their continuously expanding platform. They're looking for talented and trusted engineers to help them impress their customers.

Responsibilities:

• Back-end development to meet customer's business needs and implement components according to modern software development environment (cloud-based platforms, microservice architecture, etc.)
• Front-end development to meet customer's business needs
• Taking part in the decision-making process in design application architecture, solution development, architecture, and code review
• Develop and review feature design documents and provide inputs/updates to specifications for the solution
• Design and implement a set of various types of tests (unit, integration, functional, etc.)
• Proactive position in solution development, process improvements
• Working in an international distributed team in an Agile environment
• Communicate with PMs, engineers, Architects, QA, and other colleagues and stakeholders
• Delivering the product roadmap and planning
• To use high coding standards, software best practices and write highly testable, automatable and performant code over the whole SDLC

Requirements:

• Experience in software development for more than 5 years
• Excellent knowledge in Computer Science, Computing Theory
  • Paradigm & Principles (OOP, SOLID, DDD, TDD, BDD)
  • Database theory (RDBMS, NoSQL)
  • Code testing practices
  • Algorithms
  • Data structures
  • Architectural, Enterprise and Design Patterns
  • Security patterns, Reverse engineering resistance, Common attack types (OWASP)
• Understanding of network interactions
  • protocols
  • conventions (e.g., REST, RPC)
  • authentication and authorization flows
  • standards and practices (e.g., oAuth, JWT)
• Excellent knowledge and experience in C# and .NET (5+ years)
• Good knowledge of
• Practical commercial experience with:
  • REST API development
  • .NET Framework, .NET Core, ASP.NET (Core, MVC, WebAPI)
  • Testing frameworks (e.g.NUnit, XUnit, MSTest) (more than 2 years)
  • ORM (e.g. Entity Framework, Dapper)  (more than 2 years)
  • RDBMS (e.g. SQL Server, MySQL/MariaDB, PostgreSQL)  (more than 3 years)

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.