Senior Full Stack Engineer

Company Description

Our mission as a company providing IT services is to provide our clients all over the world with the best solutions. We manage to do this by analyzing the needs of our clients and matching them to the skills and aspirations of our employees. Therefore, one of our main motivations is to provide each Employee and Consultant with a satisfying experience. Joining us means being part of a community with diverse personalities. Start your adventure with act digital Polska!

Job Description

The project focuses on building AI-powered software development platforms designed to automate and streamline large parts of the Software Development Lifecycle (SDLC). The solution is already being used by multiple engineering teams across different business areas. Developers will work closely with business stakeholders to deliver innovative solutions, while also contributing to the development of AI capabilities, team enablement and knowledge sharing.

Responsibilities

• Developing full-stack applications, covering both backend and frontend components.

• Using AI-powered development tools to automate and optimize software engineering processes.

• Building and enhancing capabilities, knowledge and skills for AI agents.

• Applying AI tools safely and efficiently, with particular attention to token usage and cost optimization.

• Working closely with business stakeholders and engineering teams across different business areas.

• Supporting the adoption of AI-driven development practices across the organization.

• Training and mentoring other developers and teams.

• Sharing technical knowledge and contributing to the development of engineering teams.

Requirements

• Senior-level experience in software development.

• Strong hands-on experience with Java and Spring Boot.

• Practical experience with AWS.

• Frontend development experience with React or Angular.

• Strong understanding of microservices and web service architecture.

• Hands-on experience using AI coding tools in an enterprise environment, such as Claude Code or OpenAI tools.

• Experience with GitLab and DevSecOps practices.

• Fluent English, both written and spoken.

• Excellent communication and interpersonal skills, including experience presenting solutions to business stakeholders and training other teams.

• Willingness to travel to the UK for business trips (approximately 40% of working time spent on-site at the UK office each month).

Nice to have

• Experience with Python or .NET Core.

• iOS or Android development experience.

• Claude (Anthropic) or OpenAI certifications.

• Familiarity with open-source AI frameworks and agent harnesses.

• Experience building AI agents and developing agent skills.

• Understanding of token economics and AI usage cost optimization.

Additional Information

• Type of contract: B2B

We offer

• Access to local and international projects - Clients from France, Germany, Portugal, UK, and Benelux.

• Professional development support - trainings, technical certificates, conference participation, foreign language classes, and soft skills trainings are subsidized for up to 2 000 PLN.

• Bonus for recommending Candidates starting from 6 000 up to 10000 PLN.

• Fully paid Medicover healthcare card.

• Psychological support program WellBee.

• Multisport card.

• Regular integration events and gifts.

• Long-term cooperation.

• Relocation Program.

If You applied for this position the Controller of your personal will be ACT DIGITAL POLSKA Sp. z o.o., with its registered office at Przyokopowa 31, 01-208 Warsaw. The personal data provided by you will be processed for the purpose of the recruitment process and for future recruitment processes.

You have the right to access the content of your data, request their rectification, erasure, restriction of processing, the right to data portability, the right to object to the processing of your data and the right to lodge a complaint to the President of the Personal Data Protection Office.