Hire Freelance System Security Developers
Mark Castagneri
Freelance System Security Developer
Mark is a risk assessor, program manager, security operations engineer, and architect with over 10 years of experience implementing risk reduction initiatives. He has a deep understanding of various security frameworks and tools. Mark has successfully developed budgets, risk-informed roadmaps, and project plans and has led multidisciplinary teams to effectively reduce risks and demonstrate compliance with standards, as confirmed by 3rd-party auditors.
Show MoreJohn Mbuthia, M.Sc., CISSP
Freelance System Security Developer
John has 17+ years of experience managing all aspects of IT and cybersecurity for Fortune 500 organizations and small operations. His expertise includes risk mitigation through balanced processes and controls, BCM, GRC, IAM, security operations, third-party risk, social media brand protection, training and awareness, physical security controls, incident response table-top exercises, and vulnerability management. John has consistently created compliant environments safe from emerging threats.
Show MoreElias Diab
Freelance System Security Developer
Elias is a highly dedicated business, technical, and strategic information security, cybersecurity, and risk management officer, executive, consultant, advisor, expert, and specialist. With over 30 years of worldwide experience, he specializes in building, managing, and maintaining information security and cybersecurity programs designed to protect your organization's systems and assets from internal and external threats and help organizations achieve their regulatory compliance requirements.
Show MoreNicusor Serban
Freelance System Security Developer
Nick is a site reliability engineer who uses the best practices out there to enhance an app's DevOps lifecycle. He can automate everything from the code to testing, the release management, deployment, operations, monitoring, and CI/CD pipelines. He's also good at bringing your entire app stack into a nice Docker stack managed by either Compose, Swarm, or Kubernetes. Nick also worked as a developer with C#, Node.js, PHP, Python, among others.
Show MoreRogelio Nicolas Mengual
Freelance System Security Developer
Rogelio is a versatile, positive, and self-motivated full-stack engineer with over twelve years of work experience in many programming languages, frameworks, and platforms. He enjoys taking on new challenges and constantly strives to learn new skills.
Show MoreIvan Sedlak
Freelance System Security Developer
Ivan has over 12 years of professional hands-on experience using a wide range of Microsoft technologies, mainly on enterprise web applications, security, internet, and serverless functions. His previous position was in a private company working as a senior .NET full-stack developer, software architect, and team leader. He has worked primarily on large-scale projects. Ivan has been working with Toptal clients since 2015.
Show MoreYuriy Polonskiy
Freelance System Security Developer
Yuriy is the type of developer who believes that simplicity is the highest sophistication. Along with having several years of experience, he brings an eye for detail, a considerate and measured personality, and superb communication skills. His strongest skills are in DevOps—over four years of experience—but he’s also quite good with Python, AWS, cloud technologies, among others.
Show MoreZoran Žunko
Freelance System Security Developer
Zoran is a veteran software engineer with over 15 years of professional experience. All around Salesforce.com—consultant, architect, developer, administrator—he's also a PMP certified project manager. He can work with anything related to Salesforce, ranging from regular configurations/customizations, communities, integrations, mobile apps, or org reviews.
Show MoreKarlo Smid
Freelance System Security Developer
Karlo is a senior test engineer with skills in test automation, team leadership, and documentation. As a software tester, he likes to break stuff that others think works. As a team leader, he has proven abilities allowing him to build teams from scratch and streamline the QA process to perfection.
Show MoreKanwaljeet Singh
Freelance System Security Developer
Kanwal is a cloud security architect with over a decade of experience with Azure, IT security operations, security information and event management (SIEM), information security, and vulnerability management. His expertise is backed by various cybersecurity certifications from vendors such as ISC2, Microsoft, Cisco, and Palo Alto Networks. Kanwal is currently working on projects related to the cloud and cybersecurity.
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