Hire Top Freelance Security testing Developers

Aniroodh Parashar

Software Engineer with 9.5+ years of experience in web development, backend development, and server architecture. Expertise in building and maintaining various web/backend solutions, from automobile websites to job portals to freelance platforms with live chat integration . Proficient in server architecture setup, deployment, and optimization. I will give a **full refund** if I am not able to help.

Sourav Paul

Sourav is a Senior Software Developer at IBM Research Lab. He is working as a Full-Stack Developer in building highly scalable, resilient distributed systems. Sourav will help you with to prepare coding interviews, System Design for FAANG and other top product companies Have been passionately solving Leetcode, HackerRank, Codechef, Codeforces, Codesignal problems, and enthusiastically solving problems with the analysis of space... ♛ Career Domain - ▪️ Data structures & algorithms. ▪️ Large-scale distributed systems(HLD/LLD). ▪️ E2E Backend system architecture(API Gateways/LB/Cache/DB/Messaging Queues/Microservices). ▪️ REST APIs/Data Streams/Batch Jobs/Event-driven systems. ▪️ Java/Rx/SpringBoot/Hibernate/MySQL/Cassandra/Docker/Kubernetes/CICD/Git/Cloud. ▪️ Software engineering mentorship to the freshers/experienced professionals. ♛ Key Responsibilities - ▪️ Building scalable quality software solutions by designing, writing code, and unit tests through consistent development practices with a focus on continuous integration/continuous deployment, continuous monitoring, and automated testing(TTD/BDD). ▪️ Debugging software components, identifying code defects, and remediating the buggy flow. ▪️ Participating in code reviews and collaborating on best practices with colleagues. ▪️ Enabling the deployment, support, and monitoring of software across test, integration, and production environments. ▪️ Identifying opportunities for adopting new technologies. ▪️ Demonstrating increased self-reliance to achieve team goals. Influencing team members with creative changes and improvements by challenging the status quo and demonstrating risk-taking. ▪️ Effectively interpreting technical & business objectives, functional/non-functional requirements, involved challenges, and articulating solutions. ▪️ Collaborating with a team of Engineers, Scrum Master, and Product Owner to effectively achieve objectives by clearly communicating ideas and concepts. ▪️ Mentoring and guiding junior team members to success within the team. ▪️ Interviewing college grads/senior engineers as part of global hiring events across the org. ```Feel free to reach out for anything related to,``` ▪️ Software Design/Development/Prototyping/Pair coding. ▪️ Web Technologies/API design/Code reviews. ▪️ Career development/Consulting/Training/Mentorship/Interviews in technology/DSA/System Design. ▪️ Business Idea and its transformation into technology.

Jonathan Kanaan

You need someone that knows the ins and outs of technology and UX. I'm an experienced data scientist, software engineer, and user experience designer that has worked for JPMorgan Chase, the United Nations, American Express, AT&T, and Lockheed Martin as well as for several startups and small businesses.

Olajide Olanrewaju

Freelance Security testing Developer5.0 (219 reviews)

I am a **Multi-talented** professional adept in **Full Stack Web Development**, **Web Security Research**, and **Robotics Engineering**. As a dedicated Web Security Researcher and ethical hacker, I uncover vulnerabilities and mitigate security risks, bridging the gap between development and cybersecurity. Additionally, as a Robotics Engineer, I design and build sophisticated robotic systems, applying my deep understanding of mechanics, electronics, and programming. Passionate about crafting clean, scalable code and innovative robotics solutions, I contribute to projects that prioritize both robust development, cybersecurity practices, and cutting-edge robotic technology.

Gene Zeiniss

With 13+ years in the HighTech industry, including 9 years in FinTech, I specialize in building scalable, high-performance backend systems for eCommerce and financial platforms. My expertise lies in Java, Spring Boot, Microservices, Domain-Driven Design (DDD), and Relational Databases, ensuring businesses have reliable, efficient, and secure infrastructures. Beyond my technical role, I am passionate about mentorship and community impact. I led a Backend Guild, fostering knowledge sharing and best practices across engineering teams. I also co-managed the Tech-Blogging Program at Baot, helping women in tech publish their first technical articles, and served as an Intuit Women’s Network ERG Leader, advocating for career growth and inclusion in tech. Over the years, I played a pivotal role in architectural transformations and financial integrations, including: ✅**Hybrid SDK for Sensitive Data Detection (Intuit)** – Designed a Hybrid SDK that enabled dynamic configuration updates without requiring SDK version upgrades. Extracted validation logic from the SDK and represented it as mathematical expressions. This approach was secured through a patented method: Secure, Dynamically Loaded Input Validation Using Mathematical Expressions. ✅ **Monolith to Microservices Transition (Behalf)** – Led the company’s first microservice transition, mentored other teams, and introduced an Anti-Corruption Layer (ACL) to bridge legacy dependencies and ensure a smooth migration. ✅ **Wells Fargo Integration** – Engineered a seamless connection to enhance payment processing. ✅ **Cross River Bank & PPP Integration** – Led the integration efforts during the pandemic, enabling SMBs to access critical funding through the Paycheck Protection Program (PPP). Now, as a freelance backend engineer, consultant, and mentor, I help businesses architect scalable eCommerce platforms, optimize payment flows, and build robust backend infrastructures tailored to their needs. 💡 What I Offer:🔹 **Backend Development** – Scalable, high-performance Java & Spring Boot applications. 🔹 **Consulting & Mentorship** – Guiding teams on architecture, best practices, and code quality. 🔹 **Code Reviews** – Ensuring clean, efficient, and maintainable codebases. 🔹 **Public Speaking & Thought Leadership** – Sharing insights on backend development, FinTech, and eCommerce. Let’s connect! Whether you need backend expertise, consulting, or mentorship, I’m happy to help. 🚀

Souhail Mssassi

With more than 10 years of experience in cybersecurity as an offensive Security Engineer specialized in application security, cryptography and security of decentralized applications, he assisted several organizations in improving their own cybersecurity strategy. And as an Instructor and a Speaker, he presented Security lectures in universities and Conferences. Recently researching on Formal Verification in the cybersecurity Field. He is Also a Blockchain Developer in Solidity and also working as a Security Researcher in Blockchain.

Johnny B. (Ionică Bizău)

Freelance Security testing Developer5.0 (1739 reviews)

Hey! I am Johnny B. 🙏 (Actually, my Romanian friends call me Ionică, which in English is basically: Johnny). ...and I 💖 emojis! I started coding around 2010, starting with simple static websites, WordPress applications, and then tried Node.js for the first name around 2012. Since then, I have been working with Node.js. I like it a lot. Currently, I do the best in: ★ Node.js 🚀 ​ ​ ☆ Command line tools ​ ​ ☆ Express.js ​ ​ ☆ Passport ​ ​ ☆ Raw/minimal code, without frameworks (e.g. simple HTTP server) ​ ​ ☆ Using npm ​ ​ ☆ Creating npm packages for Node.js (and for the front-end as well) ​ ​ ☆ Scraping the web ​ ​ ☆ Automation of repetitive tasks ​ ​ ☆ Image processing ★ JavaScript ✨ ​ ​ ☆ Creating and importing libraries ​ ​ ☆ jQuery (creating plugins, using them etc) ​ ​ ☆ Scraping ​ ​ ☆ Automation of repetitive tasks ​ ​ ☆ Publishing npm packages ​ ​ ☆ SVG (SVG.js, d3.js) ★ HTML & CSS 🎨 ​ ​ ☆ Fixing CSS quick issues ​ ​ ☆ Implementing mockups ​ ​ ☆ Making the page responsive ​ ​ ☆ SEO tips & tricks ★ Command line 💻 ​ ​ ☆ Shortcut tips ​ ​ ☆ Creating command line tools ​ ​ ☆ Using VIM & Tmux ★ Code Review 👀 ​ ​ ☆ I do code review offline, for Node.js, JavaScript, eventually CSS. ​ ​ ☆ Can be done in a live session as well. ​ ​ ☆ Security checks ​ ​ ☆ I point things that can be done in a better way ★ Using Git & GitHub/GitLab/BitBucket etc. 😸 ​ ​ ☆ Introduction to how Git works ​ ​ ☆ Using Git hosting services (e.g. GitHub, GitLab, BitBucket etc) ​ ​ ☆ Top Git commands ​ ​ ☆ Shortcuts If I can help, I will definitely do it, as long your app is not promoting things that tend to be potentially immoral. For example, I'm happy to help you build an e-shop, but I will probably not build an e-shop designed specifically for selling wine since I am against the use of alcohol for drinking. ♦ 🚀 Node.js: 9 years of experience, ~700 packages published on NPM ♦ 💛 JavaScript: 9 years of experience, lots of libraries you can download freely (https://goo.gl/ewoQsK) ♦ 🗣 Fluent in speaking English & Romanian, and comfortable in Spanish & Portuguese ♦ 😸 GitHub Enthusiast (follow me: https://github.com/IonicaBizau) ♦ 😻 Git & GitHub power user ♦ 🍀 Comfortable with MongoDB (especially, the native driver for Node.js) ♦ ❇️ I will not charge you if I can't fix your issue. Why you can trust me: ★ I am a vegetarian. I have never eaten meat. 🍍🥑🥗 ★ I have never drunk wine, beer, etc. Water is the best. 💧 ★ I work for 6 days, and I rest on the 7th day. That's why I am *not* available on Saturdays (specifically between Friday's sunset and Saturday's sunset, my location at the time—you can my timezone a little bit below). 🙏 ★ I sleep between 9:18 PM and 4:42 AM. Depending on your timezone I can wake up earlier if you book a session with me. 💤 ★ I am a musician (pianist and organist). 🎹 ★ I use VIM on macOS and Linux. 🐧🍏

Scott K

Some recent examples include; 1) Integration and Implementation of Cisco ISE with Trustsec and Cisco ASA/Sourcefire/FireSIGHT/FireAMP for endpoints and Networks 2) integration and implementation of Cisco ISE with Cisco ASA. 3) Integration and Implementation of Cisco ISE, Cisco Trustsec, Cisco AnyConnect and 802.1X authentication with Microsoft Active Directory, Guest Internet access, Cisco ASA, and Sourcefire/FireSIGHT/FireAMP. 4) Transitioned company networks from one company into two while performing all upgrades. Work included Cisco ISE, Cisco Trustsec, Cisco ASA, Cisco Prime, and Cisco WLC 5) Implementation, Integration, Training of Cisco ISE with 802.1X Wired/Wireless configuration with Trustsec.. • Upgrade of WLC and integrate with Cisco ISE and Cisco Prime in over 350 Hospitals across the U.S. • Provide Network Security, Penetration Testing, and network defense strategies to clients throughout the world. • Consult with major utilities on Smart-Grid Cybersecurity and physical security, and provide recommendations and technology implementation (NERC CIP v3 – v5). • Provide Crypto-Currency Consulting and Security recommendations. • Create Solutions based upon Microsoft Azure, AWS and Vmware vCloud Cloud Platforms, VM’s, Databases, Servers, AD, FIM, DNS, IPS, and other cloud base products. • Migration of Windows XP to Windows 7, Windows 8.1, and Windows 10 operating systems. • Cisco Prime, ISE, ACS, and 5508 Controller migrations. • Leader for driving Security Breach issues to closure, while also advising customers on compliance with state and federal laws (NERC / NIST v3-v5) • Served as VP for National Smart grid solution telecommunications provider. • Extensive research on Current security issues. (TLS/SSL,Secp256r1(k1), ECDSA, AES, ECDHE etc.) Attacks and recent vulnerabilities (side-channel attacks, timing attacks etc.) Built a compliant POC for blockchain and related Dapps using IBM Hyperledger, and Solidity. Have created SmartContracts and created New Crypto Coins and tokens. �l�

Daniel ADEMESO

I am a Senior DevOps/SRE with 7+ years of experience, specializing in multi-cloud platforms (AWS, GCP, Azure, OCI) and infrastructure. As a remote Senior DevOps Engineer at Binance, I contributed to a billion-dollar project. My skills include CI/CD tools, IAC with Terraform, Ansible, Docker, Kubernetes, and strong Python and Bash scripting. Additionally, I'm experienced in monitoring and observability using Prometheus, Grafana, ELK stack, and more. My expertise spans both infrastructure, security, and development, ensuring optimal project outcomes. Skills not limited to - AWS, GCP, Azure - Docker, Kubernetes - Terraform (IAC) - CI/CD ( GitHub actions, Gitlab ci, Jenkins) - Python and Bash - Linux - GitOps (ArgoCD, Calico, LinkerD) - Blockchain

Norah Medlin

Dynamic and articulate Technical Program Manager with over two decades of experience in the Software Development space, primarily serving the Education, Government, and Legal Industries. Intimately familiar with both Proprietary and Open Source Application & Reporting environments, bolstered by a strong background in Network, Server & Security administration. Proven knowledge leader and detailed Systems Design Analyst, offering unique strategy and change management techniques toward significant organizational performance and efficiency improvement gains. Provides collaborative tailor-designed solutions from concept to launch, artfully applying industry Best Practices to boost innovation and facilitate Organic Collaboration and Ideation. Continuous Process and Systems Improvement Specialist seeking creative teams. Over 15 years of experience as a Remote First worker and leader in the [Remote](https://www.remotelyone.com/) workers community. Member of the 2020 [Tulsa Remote](https://www.tulsaremote.com/) Workers Program cohort. In off-time, mentors and administers the [Drupal Developers Club](https://facebook.com/groups/drupaldevclub), engages in the [Drupal Slack](https://drupal.slack.com/) workspace, serves on the leadership team for the yearly [MidCamp](https://www.midcamp.org/) event, acts as the Intern Coordinator for [Drupal 4 Gov](https://drupal4gov.us/), and runs the growing [Digital Career Sandbox](https://www.linkedin.com/groups/14421975) community on LinkedIn.