Application Security Services

Application Security Services —
Safeguard Your Applications

Secure your digital assets with Toptal. Our tailored application security services are carefully designed to identify vulnerabilities, strengthen your applications, and protect you and your customers against threats.
Get a Free Consultation Now
Clients Served
30,000+
Total Vetted Professionals
20,000+
Toptal Total Projects Delivered
85,000+
Years in Business
15+

TRUSTED BY LEADING BRANDS

Our Services

Toptal Application Security Services

Security Operations Management:

Application Vulnerability Assessment

Uncover vulnerabilities with vulnerability assessment to prevent breaches and ensure regulatory compliance.

Secure Code Review

Gain visibility into coding errors that threat actors use to compromise sensitive data and application availability.

Penetration Testing

Test your applications against real-world tactics, techniques, and protocols used by threat actors.

Application Architecture Security Review

Identify application vulnerabilities, minimize security risks, and ensure compliance with regulatory standards.

Threat Modeling

Identify and evaluate potential threats and risks to applications and proactively implement risk-mitigation measures.

Secure-by-Design Consulting

Build trust and loyalty through AI algorithms focused on user needs.

Security Training and Awareness

Train developers, QA, and product owners to enforce secure development policies, procedures, and practices.

Secure Gen AI Application Integration

Implement security controls in generative AI integrations to prevent data loss and ensure data integrity.

Secure API Development

Implement APIs that follow security best practices for authentication, authorization, and data protection.

Software as a Service (SaaS) Security

Protect your SaaS applications from threats and unauthorized access with comprehensive SaaS security measures.

Application Security Monitoring

Maintain application integrity post-deployment through application security monitoring and operations integration.

Web Application Security

Proactively identify web application vulnerabilities commonly used by threat actors to support early risk reduction.

Looking for guidance about the perfect application security service for your needs?

Get a Free Consultation Now
PARTNERSHIP THAT WORKS

How We Deliver Application Security Solutions

Our application security experts, who have experience at leading companies, develop and deploy tailored solutions to meet your business needs and unique industry demands for sustainable results and long-term success.

1

Discover

A leader from our team works with you to understand your business challenges, pain points, and strategic goals to uncover new opportunities and identify the options to reach your objectives.
2

Define

Toptal leaders collaborate with your team to define your specific goals and service needs, evaluating multiple approaches and aligning requirements with your strategic objectives to define the best solution.
3

Develop

We will create your unique project timeline, process, and first drafts, whether your project involves modeling a user journey or defining your brand identity.
4

Deploy

Toptal will get to work, tracking quality assurance, handling project management, and maintaining the delivery schedule.
Zohra Ibrahimi
Zohra Ibrahimi
Information Security Practice Lead

Zohra is a seasoned cybersecurity and risk executive with more than 15 years of experience leading enterprise risk management, cybersecurity strategy, IT governance, and regulatory compliance initiatives across Fortune 500 companies and global organizations.Zohra is a seasoned cybersecurity and risk executive with more than 15 years of experience leading enterprise risk management, cybersecurity strategy, IT governance, and regulatory compliance initiatives across Fortune 500 companies and global organizations.

Previously At

Grant Thornton
CUSTOMIZED SOLUTIONS

Application Security Solutions That Deliver Value

Toptal delivers leading application security services through its diverse talent network and flexible delivery models. We implement the right skills at each project phase, blending expertise from various roles for seamless execution.
End-to-End Delivery by Toptal
Comprehensive project delivery, tailored to your specific requirements.
Information Security Practice Lead's avatar
Information Security Practice Lead
Delivery Manager's avatar
Delivery Manager
Application Vulnerability Analyst's avatar
Application Vulnerability Analyst
Application Security Developer's avatar
Application Security Developer
Application Security Architect's avatar
Application Security Architect
API Security Specialist's avatar
API Security Specialist
Threat Modeling Specialist's avatar
Threat Modeling Specialist
Application Security Project Manager's avatar
Application Security Project Manager
Zohra Ibrahimi
Zohra Ibrahimi
Toptal Logo

Information Security Practice Lead

Zohra is a seasoned cybersecurity and risk executive with more than 15 years of experience leading enterprise risk management, cybersecurity strategy, IT governance, and regulatory compliance initiatives across Fortune 500 companies and global organizations. As Toptal’s Information Security Practice Lead, she takes a strategic, business-aligned approach—building scalable, results-driven security programs that not only protect critical assets but also enable business growth.

Previously at

Grant Thornton

Experience

15+ Years

Rachael Karaffa
Rachael Karaffa
Toptal Logo

Delivery Manager

Rachael serves as a Delivery Manager at Toptal with a focus on leading diverse global teams in developing innovative solutions for our clients. She works across multiple disciplines, including technology, marketing, and management consulting. Rachael specializes in managing people and client relationships, process optimization, and driving teams toward optimal business outcomes.

Previously Managed Client

Experience

9+ Years

Aseem Shrey
Aseem Shrey
Verified Expert in Engineering
Experience Icon

5+ Years

of Experience

Application Vulnerability Analyst

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.

Previously at

Sorin Trimbitas
Sorin Trimbitas
Verified Expert in Engineering
Experience Icon

15+ Years

of Experience

Application Security Developer

Sorin is a software developer who enjoys challenges involving automation and security. Highly motivated by exciting projects, Sorin pushes himself to find solutions that work.

Previously at

Claudio Nazzari
Claudio Nazzari
Verified Expert in Engineering
Experience Icon

19+ Years

of Experience

Application Security Architect

Claudio has 19+ years of software development experience and a cybersecurity degree. He has handled back-end, front-end, and full-stack development, DevSecOps, application security, penetration testing, and solutions architecture. With his combined expertise, Claudio focuses on helping companies by developing and architecting secure and resilient web and mobile applications.

Previously at

Peter Zaki
Peter Zaki
Verified Expert in Engineering
Experience Icon

10+ Years

of Experience

API Security Specialist

Peter is a security professional with 10 years of experience helping major multinational companies protect their infrastructures and customers. He designs secure systems and applications, providing guidance on security practices for web, cloud applications, and APIs. His expertise includes secure application development, cloud-native security, and DevSecOps. Peter holds certifications as a CISSP, OSCP, and AWS Solutions Architect – Associate.

Previously at

Arun Pillai
Arun Pillai
Verified Expert in Engineering
Experience Icon

12+ Years

of Experience

Threat Modeling Specialist

Arun is a senior DevSecOps architect with 12+ years of experience and a master's degree in information technology. He has worked with government departments, banks, telecoms, healthcare companies, and small- to medium-scale enterprises worldwide.

Previously at

Mladen Gavrancic
Mladen Gavrancic
Verified Expert in Project Management
Experience Icon

25+ Years

of Experience

Application Security Project Manager

Mladen is a senior project manager and GRC consultant with extensive experience leading multicountry project teams in the banking and insurance sectors.

Previously at

Looking for guidance about the perfect application security service for your needs?

UNRIVALED EXPERTISE

Our Talent Has Worked With Top Companies

Having previously worked with these leading global companies, our talent brings valuable insights and expertise to deliver world-class outcomes.

Google
OpenAI
Meta
Microsoft
Apple
GoogleOpenAIMetaMicrosoftAppleIBMTeslaOracleAccentureAmazon Web ServicesAirbnbintelDuolingoBooking.comSAPHBOAdobeCiscoNvidiaSAS

Toptal Ranked #1 Most Reliable Professional Services Company in America

Newsweek and Statista’s rankings were based on an independent survey of more than 2,400 decision-makers at Fortune 500s.

Newsweek's Most Reliable Companies in America 2026 ranking. Toptal is ranked #11, the highest-ranked professional services firm.
1Microsoft
2IBM
3Amazon
11Toptal
12Adobe
33Accenture
39Deloitte
66Cognizant
80McKinsey & Company
101KPMG

Highest ranked across all industries

Other Professional Services

Methodology for the Rankings

How likely the respondent is to recommend the selected company to others.

Measures the convenience of interaction with the company and efficiency of processes.

Measures the company’s cost-effectiveness and quality relative to price.

Measures whether the company consistently meets or exceeds expectations in quality and timeliness of deliverables.

Measures the company’s ability to consistently fulfill commitments and maintain customer trust.

OUR THOUGHT LEADERSHIP

Explore Insights From the Application Security Field

Read the latest articles and resources to keep you current on emerging trends in digital innovation, customer experience, product design, UX best practices, and more.

Ask a Cybersecurity Engineer: Trending Questions About AI in Cybersecurity

In this ask-me-anything-style Q&A, leading Toptal cybersecurity expert Ilia Tivin responds to colleagues’ questions on AI in cybersecurity and provides data and network protection tips and best practices.

Read More
Ilia Tivin

Ilia Tivin

20 Years of Experience
Ilia is a cybersecurity professional and developer with wide-ranging experience in the government, defense, manufacturing, and finance sectors. A former cloud security architect at Hewlett Packard Enterprise, he now advises executive clients on planning, prioritizing, and executing strategic security initiatives.

Previously at

Hewlett Packard EnterpriseCisco

Looking for guidance about the perfect application security service for your needs?

Get a Free Consultation Now