Backend Developer (.NET + C#)

This role emphasizes technical problem‑solving, software development, and the delivery of high‑quality code. The.NET/C# Developer will also support internal systems and collaborate with cross‑functional teams to ensure that development aligns with company goals.

Expectations – the experience you need

About the role:

Our client offers a variety of valuable customer communication tools, pulling and organizing telephone, and other multi‑channel engagement data, into any configuration needed; empowering the company’s teams to drill down from summary reports visualizations, showing high‑level trends, into discrete calls or interactions, to facilitate context’s understanding.

This position focuses on designing, implementing, and maintaining robust software solutions to meet the needs of our customers and internal teams. As a key member of the development team, you will contribute to the ongoing improvement of the client’s platform while solving complex technical challenges. This role emphasizes technical problem‑solving, software development, and the delivery of high‑quality code.

Additionally, the .NET/C# Developer will support internal systems and collaborate with cross‑functional teams to ensure that development aligns with company goals.

The Backend Developer role requires strong technical expertise combined with practical, integrated use of AI tools throughout the software development lifecycle. AI usage is a core expectation rather than an optional skill.

Candidates must demonstrate hands‑on experience using AI‑assisted development tools such as Cursor, GitHub Copilot (Visual Studio/VS Code), Claude Code, Codex, or similar solutions. Evaluation focuses not only on tool familiarity, but onhow developers actively collaborate with AI during planning, coding, and problem solving.

Developers are expected to use AI during code planning and implementation, showing how they structure prompts, interpret responses, validate outputs, and iterate based on AI feedback. Strong candidates rely on AI as part of their normal workflow, especially when approaching complex features, using large language models to explore solutions, refine architecture decisions, and accelerate development.

Advanced AI usage is preferred, including leveraging LLMs for feature design, problem decomposition, and solution exploration before and during implementation.

Domain experience in contact center or telecommunications environments is valuable, particularly familiarity with concepts such as agents, call queues, call groups, transfers, conferencing, and support workflows.

In addition to technical capability, candidates should demonstrate strong communication and collaboration skills, clearly explaining their reasoning, decisions, and AI‑assisted approach to solving problems.

The ideal candidate combines backend engineering expertise, effective communication, domain awareness, and mature AI‑integrated development practices.

Some of the main responsibilities for the role include:

• Design, develop, test, and maintain software features and enhancements for the client’s Platform using .NET/C#
• Solve complex technical challenges, ensuring robust and scalable solutions
• Troubleshoot and resolve technical issues related to the platform and provide input on root cause analysis for identified problems being part of the on‑call rotation
• Collaborate closely with the Product, QA, and Customer Success teams to deliver new features and resolve issues effectively
• Participate in code reviews to ensure code quality and adherence to best practices.
• Build and maintain integrations with third‑party systems such as HubSpot and other internal tools
• Optimize and maintain our internal administration and billing systems
• Continuously improve the platform by researching and implementing new technologies, tools, and techniques
• Collaborate with Sales, Marketing, and accounting teams to address their technical and development needs.
• Work with AI tools.

Qualifications

• +90% English written and oral (at least B2 level) with excellent communication skills
• 3 years of hands‑on software development experience with C# and .NET
• Strong experience with Microsoft SQL, Azure, and business intelligence
• Experience in telephony engineering or the contact center industry is a plus
• Hands‑on experience with AI tools
• Proficient in debugging, diagnosing, and solving complex technical problems
• Strong understanding of software development principles and design patterns
• Experience with modern development practices, including CI/CD pipelines, source control (e.g., Git), and automated testing
• Knowledge of RESTful API design and development
• Exceptional problem‑solving and analytical skills with a focus on delivering practical solutions
• Strong project management and cross‑functional collaboration skills
• Excellent verbal and written communication skills to effectively share technical concepts with both technical and non‑technical stakeholders
• Ability to prioritize tasks and work effectively in a dynamic, fast‑paced environment
• Knowledge and use of AI tools.

Our offer – professional development, personal growth

Hover on each benefit to learn more

Decide on the form and conditions of your employment

*Applicable in: Poland & Latam & MD/RO

Flexible employment and remote work

Work with the latest technologies for industry leaders

*Applicable in: Poland & Latam & MD/RO

International projects with leading global clients

Travel to clients’ and work in their environments

*Applicable in: Poland & MD/RO

International business trips

Work comfortably in a relaxed and inspiring atmosphere that does not enforce a dress code

*Applicable in: Poland & Latam & MD/RO

Non‑corporate atmosphere

Develop your skills at work – language classes come to you

*Applicable in: Poland & MD/RO

Language classes

Develop your competences and skills through skill centers and webinars

*Applicable in: Poland & MD/RO

Internal & external training

Take care of the health of you and your loved ones

*Applicable in: Poland & MD/RO

Private healthcare and insurance

Work out, swim and enjoy other fun activities

*Applicable in: Poland & MD/RO – monthly sport budget

Multisport card

Take part in activities that support your physical and mental health