Application Support Specialist
MainstreamBelgrade, Central Serbia, Serbia
Posted January 28, 2026
Full Time
About the Company
Mainstream is a cloud‑centric technology firm headquartered in the SEE region, delivering managed hosting, public, private, and hybrid cloud solutions across six European countries. Leveraging deep expertise in Microsoft Azure, AWS, and Google Cloud, the company offers end‑to‑end services—cloud hosting, IaaS, application development, migration, backup, and disaster recovery—backed by a state‑of‑the‑art HA infrastructure that guarantees 99.99% uptime. What sets Mainstream apart is its value‑first strategy: senior architects conduct in‑depth assessments of clients’ IT environments to design custom, cost‑effective solutions that unlock maximum cloud ROI. With a roster of over 200 enterprise customers and a dedicated 24/7 NOC, the firm combines technical excellence, proactive support, and a culture of continuous innovation to drive sustainable growth for its clients.
Job Description
Implementation, administration, support, and maintenance of middleware applications and third-party applications to enable communication between financial applications across different platforms and interfaces.
Requirements
- 2+ years of experience in middleware/application operations or system administration (preferred)
- Hands-on experience with Linux (Windows is a plus) and app/middleware platforms (JBoss/WildFly, Tomcat, Apache, AMQ/ActiveMQ)
- Experience with monitoring, troubleshooting, incident resolution, and implementing changes/updates
- Good understanding of basic system security and operational best practices
- Docker knowledge required; Kubernetes/OpenShift is a strong plus
- Advanced English and strong communication & organizational skills
Benefits
- Generous Paid Time Off
- 401k Matching
- Retirement Plan
- Visa Sponsorship
- Four Day Work Week
- Generous Parental Leave
- Tuition Reimbursement
- Relocation Assistance
