Hire the Best Antispam and Antivirus Specialists

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Karthik R.

Linux & Windows System Administrator | Automation Specialist

Chennai, India
$15 per hour
88 jobs
$9K+ total earnings

✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 9+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

Reem B.

15 years as Linux admin.Devops,SRE,Cloud. cybersecuirty specilasit.

Tallinn, Estonia
$44 per hour
69 jobs

I have more than 15 years of working experience as a Linux admin. Installing updating testing new Confluence plugins using Apache JMeter and Jenkins !! Tuning and upgrading the Environment, Apache tomcat, Oracle JDBC, Monitoring the JVM. USING Grafana and Influx DB. checking for Java threads problems !! check CPU and Memory usage and Apache tomcat ORACLE errors. Installing configuring Linux, Apache, MySQL, PHP .postfix Nagios,Zabbix.MySql . troubleshooting . and log monitoring and docker. I studied both cyber security and digital forensics coursed. So I have practical experience on the following . Security: Ethical Hacking & Countermeasures, Managing Secure Network Systems,Linux Networking, and Security, Conducting Penetration and Security Tests, Securing Wireless Networks, Investigating Network Intrusions and Computer Forensics. Malware analysis. Reverse Engineering. Principles of Secure Software Design.Hadoop. networking Tools: Wireshark.

Nicky L.

Senior IT Solution Architect | Multi-Cloud, Network & Security Expert

Puchong, Malaysia
$30 per hour
1 job
$31 total earnings

I am an experienced Solutions Architect and Systems Engineer specializing in designing, implementing, and securing robust, high-availability enterprise IT infrastructure. With over a decade of hands-on experience across full lifecycle deployments, I serve as a bridge between complex business needs and rock-solid technical execution. Whether you need end-to-end cloud migration, network perimeter hardening, or seamless cross-border technical coordination, I deliver solutions optimized for performance, scalability, and security. What I Do Best: Enterprise & Hybrid Cloud Architecture: Designing and deploying scalable infrastructure across multi-cloud environments, on-premise clusters, and hybrid virtualization platforms (VMware vSphere/vCenter, KVM). Multi-Vendor Network & Security Engineering: Integrating enterprise perimeter security, zero-trust models, and complex routing using Fortinet FortiGate, Palo Alto, and Check Point firewalls alongside Cisco, HP, Dell, and Huawei switches. Pre-Sales Strategy & RFP Execution: Translating ambiguous business goals into detailed Bills of Materials (BoMs), technical specifications, and winning RFP/Tender proposals aligned with client budgets. Linux & Windows Automation: Maintaining and optimizing enterprise Linux distributions (Red Hat, CentOS, Ubuntu) and Windows Server environments, leveraging Bash and shell scripting to streamline IT operations. Bilingual Technical Delivery (English & Japanese): Leading cross-border technical engagements, solution reviews, and architectural alignment between global headquarters, expatriate stakeholders, and local execution teams in fluent Business Japanese and English. High-Level Escalation & Troubleshooting: Serving as a top-tier escalation lead to isolate and resolve mission-critical disruptions across complex WAN/LAN networks, virtual systems, and security perimeters. Let’s connect to discuss how I can help design, optimize, or scale your enterprise IT operations.

Cleverson P.

Linux Infrastructure & Security | OPNsense | Proxmox | Wazuh | Zabbix

Matinhos, Brazil
$18 per hour
5 jobs
$900+ total earnings

I help businesses secure and optimize Linux infrastructure, firewalls, VPNs and virtualization environments. Specialized in: Network & Security: OPNsense | pfSense | Wazuh SIEM Wireless & Infrastructure: Ubiquiti UniFi Ecosystem Virtualization & Backup: Proxmox VE | Proxmox Backup Server VPN & Connectivity: WireGuard | OpenVPN | Cloudflare Tunnel SysAdmin & DevOps: Linux Servers | Docker | Reverse Proxy Core Services: Network Troubleshooting | Infrastructure Hardening I work mainly with: VPN issues Firewall configuration Secure remote access Reverse proxy problems Linux server deployments Monitoring and log analysis High availability environments I focus on fast troubleshooting, security best practices and stable infrastructure delivery. If you need someone to solve infrastructure and security problems quickly and professionally, let’s talk.

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What does an Antispam and Antivirus specialist do?

An Antispam and Antivirus specialist configures email security gateways to block spam, viruses, and malware before they reach user inboxes. This role focuses on tuning detection policies and managing quarantine workflows to maintain secure communication channels without disrupting legitimate business correspondence. You analyze message logs and threat reports to identify false positives and adjust filtering rules accordingly.

  • Configure antispam and antivirus scanning behavior for inbound email processing by defining specific filter actions such as deliver, drop, quarantine, or notify. You set up message routing rules within the email security gateway to enforce these policies consistently across the organization.
  • Tune security settings including URL handling, sandboxing, and exception lists to reduce risk while minimizing false positives. This work involves reviewing detection outcomes from message logs and reports to refine filters and ensure legitimate emails pass through without unnecessary delays.
  • Integrate email security logging with a Security Information and Event Management (SIEM) system for continuous monitoring and alerting. You investigate spam and malware detections by analyzing log-based findings and coordinate security incidents using integrated investigation views to resolve threats quickly.

How to hire an Antispam and Antivirus specialist on Upwork

Step 1: Post a job

Define your email security needs clearly to attract qualified candidates. Use the Job Post Generator powered by Uma™, Upwork's Mindful AI to draft a precise description in seconds. Describe your requirements in a few sentences, and Uma creates a tailored post for this role. You can write a new post, update a saved draft, or reuse an existing one.

  • Specify the email security gateway or secure email platform you use so candidates confirm compatibility with your infrastructure.
  • List required policy management tasks, such as configuring filter actions like quarantine, drop, or notify for detected threats.
  • Mention integration needs, such as connecting email security logs to your SIEM for centralized monitoring and alerting.

Step 2: Evaluate candidates

Look for proof of hands-on experience with email threat detection and policy tuning. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to speed up your review. Focus on candidates who show measurable improvements in false positive reduction or threat capture rates.

  • Review portfolio items that document specific tuning changes, such as adjusted exceptions or URL handling rules that reduced risk.
  • Check for investigation outputs, such as log-based findings from spam or malware detections that led to resolved security incidents.
  • Verify experience with operational reports that track message security activity and filter outcomes over time.

Step 3: Interview your top choices

Discuss technical approaches to balancing security strictness with email deliverability. Schedule and conduct interviews within Upwork Messages, which generates an immediate transcript and summary after each session. Ask about their process for validating filter effectiveness without blocking legitimate business communication.

  • Ask how they configure quarantines or notification behaviors to keep users informed about blocked messages.
  • Request examples of how they triage issues using message logs and dashboards to validate scanning effectiveness.
  • Discuss their method for coordinating security incidents using integrated logging and investigation views.

Step 4: Agree on scope and begin work

Set clear milestones for policy configuration, testing, and documentation. Use Upwork Messages and the contract workroom for all communication and project management. Upwork verifies identity, offers Hourly Payment Protection, tracks hours, and holds project funds for security.

  • Define deliverables such as configured antispam and antivirus policies with documented filter actions for email processing.
  • Require documentation of security settings, including routing rules, scanning parameters, and quarantine behaviors.
  • Set a milestone for submitting tuning changes and verification results that confirm adjusted filters work as intended.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring an Antispam and Antivirus specialist cost?

$500-$1,500 per project is a typical range for focused Antispam and Antivirus specialist work. Final pricing depends on scope, technical complexity, required integrations, source-material quality, revision needs, and the freelancer's experience level.

Policy configuration

$500-$1,200/project

Entry-level to mid-level
  • Defined antispam and antivirus policies with specific actions
  • Configured notification behaviors for blocked messages
  • Recorded routing and scanning parameters for reference

Log investigation

$1,200-$2,500/project

Mid-level
  • Reviewed message logs to identify spam or malware patterns
  • Compiled findings from security event investigations
  • Listed filter adjustments to reduce false positives

Gateway integration

$2,500-$4,500/project

Mid-level to senior-level
  • Linked email security logs to monitoring systems
  • Set up automated notifications for detected threats
  • Verified data flow between gateway and analytics tools

Advanced tuning

$4,500-$7,000/project

Senior-level
  • Updated allowlists and blocklists to refine filtering accuracy
  • Adjusted URL handling settings for enhanced safety
  • Measured filter effectiveness after optimization changes

Custom security architecture

$7,000-$12,000/project

Expert-level
  • Architected complex message processing workflows
  • Built comprehensive security controls for enterprise scale
  • Documented full system configuration and maintenance steps

Frequently asked questions

Is hiring an Antispam and Antivirus specialist worth it?

For most businesses, yes: hiring an Antispam and Antivirus specialist is worthwhile. These experts configure email gateways to block malicious content before it reaches inboxes, which reduces the risk of data breaches. They also tune filters to stop false positives, so legitimate messages reach users without manual intervention.

How do I evaluate Antispam and Antivirus specialist candidates?

Look for candidates who describe specific actions they took to tune email security policies and reduce false positives. A strong candidate explains how they configured quarantine rules or integrated email logs with a SIEM tool to track threat patterns.

What tasks does an Antispam and Antivirus specialist handle?

An Antispam and Antivirus specialist configures scanning behavior for inbound email and manages filter actions like quarantining or dropping messages. They also review security logs to investigate detections and adjust settings to maintain protection levels.

Which tools do Antispam and Antivirus specialists use?

These specialists work with email security gateways and admin portals to set scanning policies and manage quarantine workflows. They also use log reporting views and SIEM integrations to monitor email threat activity and validate filter effectiveness.