Senior Software Engineer - Integrations

Build the future of HR Tech. Join CatalystOne as a Software Engineer (Integrations) in Oslo or Stockholm!
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Transform the future of integrations at CatalystOne!
We’re looking for a Senior Software Engineer - Integrations to join us in Oslo or Stockholm to design and build seamless integrations between CatalystOne, our customers and our partners. If you thrive in collaborative environments, love working with APIs and cloud technologies, and want to contribute to a high-impact SaaS platform, we’d love to hear from you.

What You’ll Do as a Senior Software Engineer

• Develop & maintain Integrations - Build high-quality integrations between CatalystOne and external partners, ensuring seamless data flow.
• Work in an agile, collaborative environment - Participate in Scrum with bi-weekly sprints, daily stand-ups, and solve problems together.
• Understand & implement API requirements - Analyze API documentation from partners/customers and build reliable, scalable integration solutions.
• Optimize & maintain our Integration Platform - Continuously improve integration performance and reliability using Microsoft Azure and Kubernetes.
• Write clean, efficient code - Follow best practices in software development to ensure maintainability and team readability.
• Troubleshoot & support existing integrations - Work proactively with the team to handle integration errors and improve system resilience.

What We’re Looking For

• Technical experience: Proven experience as a Senior Engineer or in a similar role, with proficiency in Python or C#.
• Cloud & integration expertise - Experience with Microsoft Azure integration services and API-driven development.
• Collaboration & communication - Enjoys pair programming, team troubleshooting, and knowledge sharing.
• Agile experience - Comfortable working in a Scrum environment with sprints and structured workflows.
• Kubernetes & DevOps - Experience deploying and managing cloud applications efficiently.
• Fluency in English and ideally a Scandinavian language.
• Authentication & security - Familiarity with authentication protocols (OAuth, JWT, etc.).
• Experience in B2B SaaS integrations.

Why Join Us?

• Innovate in a Fast-Growing SaaS Company - Work on meaningful integration projects that impact global customers.
• Collaborative Culture - Work closely with a supportive, team-oriented group that values knowledge sharing.
• Flexible Hybrid Work - Balance work and life with remote-friendly policies.
• Comprehensive Benefits – Choice of tech, private healthcare, gym/sports allowance and more country-specific benefits.

CatalystOne does not accept unsolicited resumes from search firms/recruiters. CatalystOne will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to the specific open position(s). Search firms/recruiters submitting resumes to CatalystOne on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary.

We would like to inform you that all candidates who receive a job offer will be subject to a background check.

Department
Technical Consulting

Role
Integration Developer

Locations
Oslo office HQ, Stockholm office

Remote status
Hybrid

Contact Mark Mc Daid Talent Acquisition Manager – People & Culture