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September 6, 2026

Senior Systems Integrations Specialist

Senior • On-site

130 - 135 PLN/yr

Warsaw, MZ, Poland

Responsibilities

  • Conduct stakeholder interviews and workshops to gather business and technical requirements.
  • Analyse existing documentation and systems to identify gaps and improvement opportunities.
  • Facilitate requirements-elicitation sessions with cross-functional teams.
  • Document functional and non-functional requirements using appropriate methodologies.
  • Create and maintain requirements specifications, process flows, system designs and technical documentation.
  • Develop user stories and acceptance criteria using Gherkin syntax.
  • Produce UML diagrams and BPMN process models.
  • Maintain documentation version control in GitHub or equivalent platforms.
  • Design REST APIs in line with best practices and organisational standards.
  • Create data models and database schemas aligned with business requirements.
  • Develop system architecture diagrams and technical specifications.
  • Design integration patterns and data-flow diagrams.
  • Collaborate with business stakeholders to validate requirements, review designs and gather feedback.
  • Coordinate daily with developers, architects and technical teams to ensure feasibility and alignment.
  • Facilitate workshops, design sessions and stakeholder presentations.
  • Ensure compliance with internal requirements and analysis standards.
  • Review and validate requirements against organisational methodologies and frameworks.
  • Conduct quality reviews of documentation and design artefacts.
  • Maintain compliance with data-governance and data-management policies.
  • Participate in peer reviews and continuous-improvement initiatives.

Requirements

  • Strong experience in eliciting, analysing and documenting business and technical requirements.
  • Proven stakeholder-management experience and collaboration with cross-functional teams.
  • Hands-on knowledge of REST API principles, design patterns, best practices and API design.
  • Practical experience in data modelling, including logical and physical data models and entity relationships.
  • Understanding of data-governance principles, data-quality standards, data lineage and compliance requirements.
  • Knowledge of data-lifecycle management, data integration and data-architecture principles.
  • Intermediate SQL skills and understanding of relational databases.
  • Experience with BPMN for process mapping and workflow documentation.
  • Experience with UML for system design and technical documentation.
  • Understanding of SDLC methodologies, including Agile, Waterfall and DevOps.
  • Ability to create system architecture diagrams, technical specifications and integration designs.
  • Familiarity with GitHub or equivalent version-control platforms.
  • Strong technical-documentation skills.
  • Understanding of enterprise-architecture principles.
  • Strong analytical thinking and problem-solving skills.
  • Effective communication skills for stakeholder management.
  • English proficiency at B2 level or higher.

Nice to have

  • Knowledge of Gherkin syntax for writing acceptance criteria in a BDD approach.
  • Experience with GitLab, Bitbucket or equivalent version-control platforms.

Benefits

  • Private medical care.
  • Co-financing for the sports card.
  • Constant support from a dedicated consultant.
  • Employee referral program.

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