Fullstack Engineer: Build Secure APIs & Scalable Platforms

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

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.