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Newsweek Ranks Toptal Toptal Ranked #1 Most Reliable Professional Services Company in America. Skip to Navigation Skip to Content Skip to Footer Related Skills: Software Developers Perl Developers DevOps Engineers Software Architects Kubernetes Developers Rust Developers Full-stack Developers Python Developers More Hire System Security Developers Hire the Top 3% of Freelance System Security Developers Toptal is a marketplace for top system security developers, engineers, programmers, coders, architects, and consultants. Top companies and startups choose Toptal system security freelancers for their mission critical software projects. Hire a Top System Security Developer Now No-Risk Trial, Pay Only If Satisfied. Clients rate Toptal system security developers 4.9 / 5.0 on average based on 6,181 reviews. Talent Navigator Find and hire Top System Security Developers worldwide. Simply click on your preferred time zone on the map. Trusted by leading brands and startups Hire Freelance System Security Developers View Scott Scott Wedekind Freelance System Security Developer Verified Expert in Engineering UTC-07:00 United States Toptal Member Since January 4, 2023 Scott is an IT network and security professional experienced in client-facing consulting and security services. Specialized in network security architecture and implementation, including security strategy, LAN and WAN design, firewall, endpoint security, and network management, he is known for his ability to translate complex information for non-technical audiences. Scott is a dedicated leader who uses business-driven security practices to maximize business effectiveness and minimize risk. Show More System Security View Joshua Joshua Neuman Freelance System Security Developer Verified Expert in Engineering UTC-06:00 United States Toptal Member Since November 23, 2022 Joshua is a seasoned cybersecurity professional with deep experience and knowledge in governance, risk, compliance (GRC), auditing, vulnerability management, network security, and network engineering. He has consulted for both the US government and the private sector. Joshua's previous roles include lead network defense security engineer, product owner and stakeholder, voice over IP (VOIP) engineer, and information assurance lead. Show More System SecurityCiscoTech FreelancingCybersecurity View Sonali Sonali Johri Freelance System Security Developer Verified Expert in Engineering UTC-05:00 United States Toptal Member Since September 13, 2023 With five years of experience in cybersecurity, Sonali specializes in managing large projects, Cisco devices, network security, and cyber monitoring. Her skills span server architecture, vulnerability testing, regulatory compliance, VPNs, and firewalls. She excels in interdisciplinary teamwork, thrives in high-pressure settings, and has strong problem-solving acumen. Sonali's dedication to cyber monitoring and innovative security solutions positions her to drive impactful contributions. Show More System Security View Chigozie Chigozie Ejeofobiri Freelance System Security Developer Verified Expert in Engineering UTC+00:00 United Kingdom Toptal Member Since November 18, 2022 Chigozie is a network security consultant with over 14 years of experience working with organizations to use technology to support and drive business goals. He has extensive knowledge of network perimeter security, defense-in-depth architectures, zero-trust designs, security operations, system security risk analysis and assessment, and project management. Chigozie is also highly experienced in perimeter security implementation of on-premise and cloud firewalls. Show More System Security View Kehinde Kehinde Alabede Freelance System Security Developer Verified Expert in Engineering UTC+00:00 United Kingdom Toptal Member Since December 13, 2023 Kehinde is a skilled network security engineer with experience building secure connectivity solutions using various IT technologies in hybrid and complex environments. Adept at scripting, automation, and designing and implementing firewalls and cybersecurity solutions, he delivers efficient data movement and automated network workflows. With analytical and problem-solving skills, Kehinde successfully solves network problems with minimal downtime to production. Show More System SecurityVisioCisco View Asif Asif Khan Freelance System Security Developer Verified Expert in Engineering UTC+03:00 Saudi Arabia Toptal Member Since October 10, 2022 Asif is a senior network security engineer with almost a decade of experience in the network security domain. He has managed multiple security projects and specialized in firewalls, including Palo Alto Networks, Panorama, Fortinet, Cisco, and F5. Asif's various certifications show he is committed to mastering and maintaining the skills and knowledge in his field of expertise. Show More System SecurityWindows Development View Anuj Anuj Pratap Freelance System Security Developer Verified Expert in Engineering UTC+05:00 India Toptal Member Since March 30, 2023 Anuj is an accredited IT security professional with 14+ years of hands-on and academic experience. As a security operations center manager, he has gained extensive knowledge of network security implementation, deployment, configuration, and support. Anuj's areas of expertise are next-generation firewalls, load balancers, IPsec VPN, vulnerability assessment, network intrusion prevention systems (IPS/NIPS), cloud security solutions, solution documents, and high- and low-level designs. Show More System SecuritySystem AdministrationCrytographerSoftware Architecture View Jubaer Jubaer Alnazi Jabin Freelance System Security Developer Verified Expert in Engineering UTC+08:00 Singapore Toptal Member Since July 18, 2022 Jubaer, an OSCP specialist, holds a reputable position in information and cloud security. With 5+ years of experience, he discovered the Apple vulnerability (CVE-2023-23526) and identified vulnerabilities in 300+ companies like Apple, Grab, Google, Yahoo, Facebook, and Uber. Jubaer excels in HackerOne, writes insightful articles, and creates Python and Go tools. His expertise spans security compliance (GRC) and Web3 technologies, making him invaluable in securing data and systems. Show More System SecurityPenetration TestingCybersecurityWeb DevelopmentDatabaseCloudflare View Ilia Ilia Tivin Freelance System Security Developer Verified Expert in Engineering UTC+08:00 Singapore Toptal Member Since November 8, 2022 Ilia is a cybersecurity professional and a public speaker who has worked with clients in various domains such as government, defense, manufacturing, banking, and finance. He has designed secure, resilient, and adaptable architectures that stand the test of time. Ilia's broad background includes advising executive management on strategic security initiatives and how to progress them in the organization. Show More System SecurityIncident responseCloud EngineeringCybersecuritySOC 2 (Service Organization Control)Technical WritingCloudflareCloud ArchitectureSystem Administration View Jihye Jihye Cho Freelance System Security Developer Verified Expert in Engineering UTC+09:00 South Korea Toptal Member Since June 15, 2021 She is a seasoned QA lead and automation engineer with extensive experience driving quality across fintech, multimedia, and enterprise B2B platforms. A specialist in building robust E2E frameworks from scratch using Cypress and TypeScript, she seamlessly bridges the gap between functional testing, API validation, and web app security. Driven by a deep sense of ownership, she excels at establishing shift-left quality cultures in fast-paced, remote environments to ensure seamless product delivery. Show More System SecuritySQLPostmanJiraAgile DevelopmentWeb DevelopmentQA AnalysisAPIREST API View Saqib Saqib Rana Freelance System Security Developer Verified Expert in Engineering UTC+12:00 New Zealand Toptal Member Since April 12, 2023 Saqib is a results-driven professional with 10+ years of experience implementing IT network security solutions. He specializes in firewalls, load balancers, routing and switching, cloud or VPN solutions, web proxies, and automation. Saqib also manages multivendor devices, including Fortinet, Palo Alto, Check Point, FortiGate, Cisco—ASA, ISE, WSA, and Firepower Threat Defense or Management Center—Forcepoint, A10 Networks, Aruba, Splunk, FortiAnalyzer, and F5 BIG-IP web application firewalls. Show More System SecurityCloud EngineeringCisco Discover More System Security Developers in the Toptal Network Start Hiring THE TOPTAL ADVANTAGE 98% of Toptal clients choose to hire our talent after a risk-free trial. Toptal's screening and matching process ensures exceptional talent are matched to your precise needs. Start Hiring System Security Hiring Resources Resources to Hire System Security Developers Job Description TemplateInterview QuestionsJobs Toptal in the press ... allows corporations to quickly assemble teams that have the right skills for specific projects. Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting. Our clients Creating an app for the game Leading a digital transformation Building a cross-platform app to be used worldwide Drilling into real-time data creates an industry game changer Testimonials Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of Tripcents as any in-house team member of Tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a startup, they are our secret weapon. Brantley Pace CEO & Co-Founder How to Hire System Security Developers Through Toptal 1 Talk to One of Our Client Advisors A Toptal client advisor will work with you to understand your goals, technical needs, and team dynamics. 2 Work With Hand-selected Talent Within days, we’ll introduce you to the right system security developer for your project. Average time to match is under 24 hours. 3 The Right Fit, Guaranteed Work with your new system security developer for a trial period (pay only if satisfied), ensuring they’re the right fit before starting the engagement. EXCEPTIONAL TALENT How We Source the Top 3% of System Security Developers Our name “Toptal” comes from Top Talent—meaning we constantly strive to find and work with the best from around the world. Our rigorous screening process identifies experts in their domains who have passion and drive. Of the thousands of applications Toptal sees each month, typically fewer than 3% are accepted. Start Hiring Today STEP 1 Language and Personality Evaluation 26.4% of applications pass The first step of the screening process is a comprehensive English language and communication evaluation. We also assess personality traits, seeking only those who are passionate and fully engaged in their work. STEP 2 In-depth Skill Review 7.4% of applications pass We test each applicant’s technical knowledge and problem-solving ability through various assessments. Every member of the Toptal network is an expert in their domain, and we typically only advance candidates with exceptional results in this phase. STEP 3 Live Screening 3.6% of applications pass Toptal screeners, who are experts in their functional domain, interview each system security developer. Our screeners provide specific live exercises, looking for problem-solving ability, depth of experience, communication ability, and creativity. STEP 4 Test Project 3.2% of applications pass Each candidate is assigned a test project to evaluate whether they can “walk the walk.” Test projects take 1-3 weeks and are comprehensive and provide real-world scenarios for candidates to demonstrate their competence, thoroughness, professionalism, and integrity. STEP 5 Continued Excellence Top 3.0% of system security developers As a quality-first company, we demand the best from our talent, so they can deliver the best to our clients. This principle permeates every Toptal engagement and delivered project. Only the top 3% of Developers can consistently perform at this level. FAQs Typically, you can hire system security developers with Toptal in about 48 hours. For larger teams of talent or full end-to-end project delivery, timelines may vary. Our talent matchers are highly skilled in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network. Once you select your system security developer, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time. To hire the right system security developer, it’s important to evaluate a candidate’s experience, technical skills, and communication skills. You’ll also want to consider the fit with your particular industry, company, and project. Toptal’s rigorous screening process ensures that every member of our network has excellent experience and skills, and our team will match you with the perfect system security developers for your project. At Toptal, we thoroughly screen our system security developers to ensure we only match you with the highest caliber of talent. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. In addition to screening for industry-leading expertise, we also assess candidates’ language and interpersonal skills to ensure that you have a smooth working relationship. When you hire system security developers with Toptal, you’ll always work with world-class, custom-matched system security developers ready to help you achieve your goals. You can hire system security developers on an hourly, part-time, or full-time basis. Toptal can also manage the project end-to-end based on your specific requirements as part of our Consulting and Services offerings. Whether you hire a system security developer for a full- or part-time position, you’ll have the control and flexibility to scale your team up or down as your needs evolve. Our system security developers can fully integrate into your existing team for a seamless working experience. We make sure that each engagement between you and your system security developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another system security developer who may be a better fit and with whom we will begin a second, no-risk trial. Toptal Lets You Hire Fast, With Unparalleled Success Trusted Talent Only Our talent network is composed of thoroughly vetted professionals who ramp up quickly, function as essential team members, and deliver results. Precise Matching Our experienced talent matchers specialize in identifying talent that fits your needs. They work to understand your exact requirements and hand-select the best professionals for your project. Seamless Hiring We handle all aspects of billing, payments, and NDAs, streamlining the hiring process so you can focus on innovation, not overhead. No-risk Trial Period We want to be sure your engagement is a total success, so we offer a no-risk trial period. Work with your new hire for up to two weeks and pay only if you’re satisfied. Effortless Scaling We help you scale your team up or down as needed, with quick and efficient hiring in under 48 hours. Flexible Engagements Our flexible engagement models allow you to choose the engagement type that suits your needs and adjust it anytime: hourly, part time, or full time. Featured Toptal System Security Publications University of Minnesota Linux Ban Prompts Questions About Open Source By Michael J. McDonald Keep It Encrypted, Keep It Safe: Working with ESNI, DoH, and DoT By Brian Wojtczak Performance and Efficiency: Working with HTTP/3 By Brian Wojtczak Top System Security Developers Are in High Demand. Start Hiring