Fullstack Developer

Us3 Consulting; Kraków; On-site; PLN 120,000 - 180,000; Full time

Job summary

Us3 Consulting is seeking a proactive Fullstack Developer to support the design, development and implementation of a growing platform. You’ll work across both front-end and back-end development, turning technical direction into reliable, secure code and integrations.

You’ll collaborate closely with the team, validate deliverables and help ensure development stays aligned with the technical roadmap, while documenting key decisions and progress.

Qualifications

• Experience across front-end and back-end development.
• Experience building and integrating REST APIs.
• Secure credential/authentication management experience.
• Ability to translate technical direction into working, maintainable code.
• Strong problem-solving skills and ability to work independently.
• Excellent English communication skills for technical discussions.

Responsibilities

• Develop and enhance platform features across front-end and back-end.
• Build and integrate REST APIs and third-party services.
• Translate technical requirements into maintainable, production-ready code.
• Implement secure credential and integration management.
• Contribute to platform design and technical decisions.
• Collaborate with stakeholders to validate deliverables and incorporate feedback.
• Document key technical decisions and solutions.
• Work independently while proactively communicating progress, risks and dependencies.

Skills

Fullstack development

REST APIs

Secure credential/authentication

Code maintainability

English communication

Independent work

Delivery mindset

Tools

Jira REST API

Atlassian tools

ServiceNow Table API

AWS or cloud

Job description

We’re looking for a proactive Fullstack Developer to support the design, development and implementation of a growing platform. You’ll work across both front-end and back-end development, turning technical direction into reliable, secure code and integrations.

You’ll collaborate closely with the wider team, contribute to technical decisions, validate deliverables and help ensure development stays aligned with the technical roadmap.

Key responsibilities

• Develop and enhance platform features across front-end and back-end.
• Build and integrate REST APIs and third-party services.
• Translate technical requirements into maintainable, production-ready code.
• Implement secure credential and integration management.
• Contribute to platform design and technical decisions.
• Collaborate with stakeholders to validate deliverables and incorporate feedback.
• Document key technical decisions and solutions.
• Work independently while proactively communicating progress, risks and dependencies.

Essential skills & experience

• Fullstack development experience, with confidence working across front-end and back-end.
• Strong experience developing and integrating REST APIs.
• Experience with secure credential/authentication management.
• Ability to translate technical direction into working, maintainable code.
• Strong problem-solving skills and ability to work independently.
• Excellent English communication skills, including the ability to explain technical concepts to non-technical stakeholders.
• Collaborative approach with a proactive attitude towards delivery and continuous improvement.

Preferred skills

• Experience with the Microsoft 365 ecosystem.
• Experience with Jira REST API / Atlassian technologies.
• Knowledge of the ServiceNow Table API.
• Experience deploying applications to AWS or another major cloud platform.
• Understanding of cloud services, architectures and deployment practices