Why Choose CalCom?

About the Role

We are looking for a hands-on Linux expert to lead the implementation of our solution in enterprise customer environments.

This is a technical, customer-facing role focused on Linux infrastructure, troubleshooting, and security hardening. You will be responsible for deploying, customizing, and supporting our product in real-world production environments.

This role is ideal for someone who enjoys working close to the systems, solving complex problems, and taking ownership from implementation through ongoing support.

Responsibilities

• Lead end-to-end implementation of CalCom’s Linux solution in enterprise environments
• Perform hands-on Linux hardening across large production systems
• Install, integrate, and configure the CalCom CHS platform
• Provide Tier 1 & Tier 2 support, including troubleshooting and issue resolution
• Investigate system behavior related to security policies, OS configurations, and infrastructure changes
• Customize and automate deployments using scripting tools
• Work closely with Product and R&D teams to improve the solution based on real customer needs
• Collaborate directly with customer IT and infrastructure teams

Requirements

• 5+ years of hands-on experience in Linux system administration in production environments
• Strong experience with RHEL / OEL / AWS Linux / Ubuntu
• Proven ability to troubleshoot complex system and infrastructure issues
• Experience with scripting (Bash / Shell / Python)
• Experience with LDAP systems
• Experience with configuration management tools (Ansible / Puppet / Chef)
• Familiarity with enterprise infrastructure (Active Directory, DNS, DHCP)
• Strong communication skills and ability to work with customers

Additional Requirement:
Ability to pass security background checks required for working with financial institutions

Nice to Have

• Experience with Linux hardening (CIS benchmarks or similar)
• Experience with security tools such as iptables, SELinux
• Background in cybersecurity or regulated environments

About the Role

The most important thing for you to succeed in this role is your mindset, a “Can Do” attitude and willingness to learn new things!

This is a hands-on, multi-disciplinary position that combines sales operations, executive support and administrative management. The ideal candidate is highly organized, proactive, and enjoys working in a dynamic environment with both local and global teams.

You’ll work closely with our leadership team, account manager, and other departments to ensure smooth operational execution and efficient business processes.

Responsibilities

Sales Operations

● Work closely with the Account Manager to manage CRM data, sales reports, and follow-ups.

● Support contract processing, invoicing, and coordination between sales, finance, and operations teams.

● Track and report sales performance metrics.

● Assist in maintaining accurate customer and opportunity records.

Office & Administrative Operations

● Oversee day-to-day office management and administrative tasks.

● Coordinate scheduling, meetings, and travel for executives and visitors.

● Manage vendor relationships and office supplies.

● Support HR and finance with documentation, contracts, and reporting needs.

Executive Administration

● Provide administrative and logistical support to company executives.

● Prepare presentations, meeting materials, and reports as needed.

● Help maintain clear internal communication across departments.

Requirements

● Experience in office management, executive administration, or operations.

● Experience in a tech or cybersecurity company – an advantage.

● Strong organizational and multitasking skills with attention to detail.

● High proficiency with MS Office / Google Workspace; experience with CRM systems (e.g., HubSpot, Zoho, Salesforce).

● Excellent communication skills in Hebrew and English (written and spoken).

● Ability to work independently, handle sensitive information, and meet deadlines.

About the Role

CalCom is seeking a visionary and hands-on R&D Manager to lead our engineering efforts and drive the technical evolution of our flagship cyber product focused on automated device hardening.

This is a hybrid leadership + hands-on role, combining ownership of product development with direct responsibility for complex customer environments and production support. You will bridge the gap between strategy, execution, and real-world deployments, ensuring our solutions perform reliably in enterprise environments.

You will work closely with the Product team to translate product vision into scalable, secure, and high-performing systems—while also ensuring strong support for existing customers and deployments.

With AI tools rapidly shifting the R&D landscape, you will also lead and orchestrate our AI transformation into aligning our product development to advance and adopt rapid development models.

Responsibilities

• Lead and mentor the R&D team, fostering a culture of ownership, quality, and accountability
• Own the full software development lifecycle, from design to deployment and maintenance
• Work closely with Product and Architecture to translate roadmap into scalable, secure solutions
• Provide hands-on support to enterprise customers, especially in Linux-based environments
• Troubleshoot complex production issues, including failures caused by hardening, upgrades, or infrastructure changes
• Support and oversee deployments at key customers, ensuring stability and performance
• Manage environments across Windows and Linux (multiple flavors), including application operation on Windows systems
• Work with enterprise technologies such as Active Directory, SQL, and IIS
• Write and maintain scripts (PowerShell, VBScript) as needed
• Balance urgent customer needs with long-term product and architectural improvements

Requirements

• 5+ years of experience in R&D leadership roles, preferably in cybersecurity or enterprise software
• Strong hands-on experience with Windows and Linux environments (including hardening and IT Administration)
• Proven ability to support enterprise customers worldwide and troubleshoot complex system issues
• Experienceworking with AI tools, Active Directory, SQL, IIS, and scripting tools (PowerShell, VBScript)
• Strong leadership skills with a hands-on, problem-solving mindset
• Ability to operate under pressure and manage both development and production challenges
• Excellent communication skills in Hebrew and English
• B.Sc. in Computer Science or a related field (M.Sc. – advantage)

This role requires a rare combination of deep technical expertise, customer-facing capability, and leadership. The ideal candidate will be comfortable operating across development, infrastructure, and real-world production environments.