Senior Full Stack Developer

Join Keepit’s mission to secure the digital world and shape the future of global cloud backup.

About the role

We are looking for an experienced Full Stack Developer to design, build, and maintain production-grade applications and systems using JavaScript, TypeScript and Node.js. In this role, you will collaborate with cross-functional teams across sales, marketing, and operations to deliver scalable and reliable solutions. A proactive approach, strong collaboration skills, and a commitment to continuous improvement are key to success in this role.

About you

Required qualifications:

• 5+ years of professional experience in full-stack application and system development

• Proven track record building and maintaining production-grade applications

• Experience working with cross-functional teams including sales, marketing, and operations

  
  

Core Technologies:

• Strong proficiency in JavaScript/TypeScript for both frontend and backend development

• Deep understanding of PostgreSQL database design, optimization, and management

• Expert-level knowledge of RESTful API design, development, and consumption

• Experience with SOAP API integration and XML processing

• Proficiency with modern frontend frameworks (React, Vue, or Angular)

• Backend development experience with Node.js or similar server-side JavaScript frameworks

  
  

Integration & Automation:

• Hands-on experience with iPaaS platforms: Zapier, Workato, or n8n

• Ability to design and implement complex multi-system integrations

• Experience building custom connectors and middleware solutions

• Understanding of event-driven architectures and webhook implementations

  
  

About us

Our platform provides customers with an immutable, historical archive of their data in systems such as Microsoft 365, Google Workspace, Salesforce, Entra ID, Dynamics 365, and Zendesk.

We protect our customers against everything, ranging from ransomware to simple accidents.

The majority of our back-end components are written in clean, modern C++ using mainly purpose-built components. Components responsible for business processes and data mining are built using Common Lisp. Everything runs on Linux.

We pride ourselves on backing up billions of objects over foreign APIs using imperfect networks on systems with finite memory and making it all happen in a performant, reliable, and predictable way.

We offer:  

• Official employment – Umowa o pracę contract

• 4 additional working days of vacation leave per full calendar year 

• 3 days of internal sick leave without a doctor`s note 

• Health and Life Insurance

• Employee Capital Plan (PPK)  

• Multisport card compensation  

• Coverage of professional training sessions, meetups, etc.

• English-speaking club with native speakers 

• Polish language classes

• Internet and Glasses reimbursement

• Cosy office in Krakow city centre (Długa, 72) with beverages, fruit, and cookies 

• Winter and summer parties, events, team-buildings 

  
  

We kindly ask you not to provide us with any sensitive categories of personal data when applying for a job with us. When applying for the vacancy, Keepit will process your personal data, and therefore we recommend that you also read our privacy policy, which describes our processing of personal data and your rights as a data subject.

If you notice any misconduct or irregularities that fall within the scope of our whistleblowing procedure, please click here to report them.