Hire the Top 3% of Freelance Mobile Security Engineers

Toptal is a marketplace for dedicated Mobile Security Engineers. Top companies and startups choose Toptal Mobile Security freelancers for their mission-critical Mobile Security development projects.

No-Risk Trial, Pay Only If Satisfied.

Hire Freelance Mobile Security Engineers

Cesar David Sosa Perez

Freelance Mobile Security Engineer
SpainToptal Member Since September 13, 2022

Cesar is a full-stack software engineer specializing in React Native, Kotlin, and Swift. His broad experience includes developing essential applications in various sectors such as banking, telecommunications, health, and artificial intelligence (AI). Cesar's important area of interest is working with Agile methodologies with CD/CI and the cloud.

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Iliyan Germanov

Freelance Mobile Security Engineer
BulgariaToptal Member Since March 30, 2022

Iliyan co-founded Ivy Apps and built Ivy Wallet: an open-source money manager with 80,000+ installs, a 4.8/5 rating, and 2,797 reviews on the Google PlayStore. The YouTube tech community recognized Ivy Wallet as the best Android UI/UX in 2021. Iliyan is also a functional programming and Kotlin expert. He built from scratch the institutional-grade security Qredo Signing App and developed the fintech mobile wallet: phyre—including its white-label products—which combined have 300,000+ customers.

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Jubaer Alnazi Jabin

Freelance Mobile Security Engineer
SingaporeToptal 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.

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Kristian Kozak

Freelance Mobile Security Engineer
Czech RepublicToptal Member Since January 21, 2022

Kristian is a senior developer focused on data engineering and web development. He has been building software for almost a decade, has leadership experience from a five-person research and development team, and has two published papers under his belt. Kristian specializes in working with data in Python and R and developing web services in Ruby on Rails.

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Jon Fenner

Freelance Mobile Security Engineer
United StatesToptal Member Since April 4, 2018

Jon has over 20 years of experience in leadership, web application design, development, and infrastructure using a variety of platforms, including React, Node.js, React Native, NoSQL, and MySQL. Jon is an exceptional communicator and works well individually and as a team player or leader.

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Joel Teo

Freelance Mobile Security Engineer
SingaporeToptal Member Since November 23, 2021

Joel is a security engineer at ADDX, where he and a colleague maintain the security posture of the entire company. His responsibilities are handling vulnerabilities, remediation, threat modeling, and spearhead initiatives to improve the security of the business' cloud environment. Joel loves to build things to solve or automate practical problems for the people around him and tries out new technologies and concepts that he comes across, such as Kubernetes, Serverless, and containers.

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Aseem Shrey

Freelance Mobile Security Engineer
IndiaToptal Member Since October 17, 2022

Aseem enjoys building DevSecOps pipelines and setting up automation using Go, Python, Terraform, CI/CD pipelines, AWS Lambda, and Google Cloud Platform (GCP), among others. To effectively manage infrastructure security at scale, he often builds fault-tolerant systems and automatic failure detection in these systems. Aseem reviews code changes going to production for security issues and often engages in web app penetration testing.

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Victor Oghifobibi

Freelance Mobile Security Engineer
NigeriaToptal Member Since March 31, 2023

Victor is a cloud architect with 12 years of experience, 3+ in designing and building cloud and hybrid solutions. He is a certified Azure Solutions Architect Expert with a computer science background and a deep understanding of how to undertake end-to-end cloud deployments, architectural design decisions, POCs, and migration plans. Victor specializes in developing highly available, scalable, secure, hybrid cloud environments and migration plans to help customers confidently adopt the cloud.

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Mehedi Hasan Khan

Freelance Mobile Security Engineer
BangladeshToptal Member Since November 13, 2013

Mehedi is a top software engineer who builds delightful mobile apps and related software systems. With nearly a decade of experience designing, architecting, and developing native Android and iOS apps, he has gained expert knowledge of Android/iOS systems, SDLC, Java, Swift, Kotlin, REST APIs, Scrum, clean architecture, and more. Mehedi is a team player and master communicator with a curious mind and an entrepreneurial mindset.

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Shahid Hakim

Freelance Mobile Security Engineer
IndiaToptal Member Since November 16, 2022

Shahid is a skilled cybersecurity professional who thrives on challenges, specializing in offensive security, red teaming, threat modeling, and incident response. He is certified in ethical hacking and blockchain security and excels in strategic threat mitigation. He has documented success in creating robust security frameworks and enjoys mentoring others. With each vulnerability, Shahid uncovers advanced cybersecurity for a safer digital world.

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Joe Bagdon

Freelance Mobile Security Engineer
United StatesToptal Member Since April 4, 2022

Joe is a seasoned security and infrastructure engineering professional with experience performing application and network assessments, writing and enforcing policies, providing defense for an enterprise environment, and administrating infrastructures. He has in-depth knowledge of information security, information technology, and information warfare. Joe is a competent Python programmer, adding automation and integration that reduces workloads.

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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

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley

Director

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller

CEO

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik

Co-Founder

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee

Principal

How to Hire Mobile Security Engineers through Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering 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 Mobile Security engineer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new Mobile Security engineer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

FAQs

  • How are Toptal Mobile Security engineers different?

    At Toptal, we thoroughly screen our Mobile Security engineers to ensure we only match you with talent of the highest caliber. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You’ll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs.

  • Can I hire Mobile Security engineers in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a Mobile Security engineer within 48 hours of signing up.

  • What is the no-risk trial period for Toptal Mobile Security engineers?

    We make sure that each engagement between you and your Mobile Security engineer 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 expert who may be a better fit and with whom we will begin a second, no-risk trial.

Tap Into World-Class Talent

  • Trusted Experts Only

    Trusted Experts Only

    All of our talent are seasoned experts who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

  • The Right Fit

    The Right Fit

    We have a knack for matching you with the right fit. Start working with your new hire on a no-risk trial period, paying only if satisfied.

  • Scale as Needed

    Scale as Needed

    Hire talent within 48 hours and scale your team up or down as needed, no strings attached.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDA’s. Let us take care of the overhead while you focus on building great products.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.

  • Expert Talent Matching

    Expert Talent Matching

    Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.

Top Mobile Security Engineers are in High Demand.

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