App and Integration Services for Innovation and Efficiency

Modernize critical digital systems to accelerate your business’s growth and productivity. Improve the agility of core operations across custom applications, cloud platforms, mobile solutions, and system integrations.

Get a Free Consultation Now

Team Leader

Featured Full Team of App and Integration Specialists

Timothy Mensch

Senior Software Architect

Tim is a senior software architect/engineer generalist. He has built the technology stack for multiple startups from the ground up and has transformed off-track projects into successful launches. He has worked in many domains, including retail, banking, Internet of Things, high-performance servers, machine learning, gamification, and scalable application server design.

Previously at

Experience

15+ Years

Joan Yang

Enterprise Architect and Developer

Joan is an enterprise architect who excels in providing technology and architecture visions that align with business priorities and corporate long-term strategy. With more than 20 years of hands-on experience working as an IT professional, she has established herself as a leader, advisor, collaborator, educator, and influencer in the area of architecture design. Joan believes trust and collaboration are the key factors to lead teams to success.

Previously at

Experience

20+ Years

Hans Luther

Software Architect and Developer

Hans is a senior full-stack developer with a master’s degree in computer information systems and more than 20 years of experience delivering software solutions. He is proficient in various stacks, languages, and databases, focusing on full-stack development using the JavaScript stack (React/Node.js), TypeScript, Python, and the Google Cloud Platform, including Firebase. Hans was a technical lead at startups and Fortune 500 companies like Deutsche Bank and is a resourceful contributor to any team.

Previously at

Experience

20+ Years

TRUSTED BY LEADING BRANDS

OUR SERVICES

App and Integration Services

Enable faster innovation with our comprehensive suite of app and integration services, providing tailored coverage for your every business need.

CUSTOMIZED SOLUTIONS

App and Integration Solutions That Drive Impact

Toptal delivers app and integration 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
On-demand Talent and Teams

End-to-End Delivery by Toptal

Comprehensive project delivery, tailored to your specific requirements.

CEO, Technology Services

Delivery Manager

Software Engineer

Cloud Architect

Full-stack Developer

CRM Solution Architect

Product Manager

QA Engineer

Robert Orshaw

CEO, Technology Services

As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM, Velocity, co-founded Corio, and was CIO for two Fortune 500 companies.

Previously at

Technology Experience

35+ Years

Rachael Karaffa

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

Cleivson Siqueira De Arruda

Verified Expert in Engineering

15+ Years

of Experience

Software Engineer

Cleivson is a senior engineer with more than 15 years of experience working in Agile development and solving business problems by diving deep into the user’s requirements. While working at Amazon, he was able to develop and maintain systems with a high load (millions, sometimes billions, of requests per day) in a highly scalable and highly available environment. Cleivson specializes in C#, Java, and TypeScript languages and can rapidly ramp up in any other technology.

Previously at

Subbu Somasundaram

Verified Expert in Engineering

22+ Years

of Experience

Cloud Architect

Subbu is a subject matter expert in information security and has more than 22 years of information technology experience. He has assisted large enterprise customers in the banking, telecommunication, and e-commerce sectors with security transformation, DevSecOps, security architecture, and implementations. Subbu’s security expertise includes AWS, GCP, IAM, enterprise security, data protection, and application security and compliance.

Previously at

Oliver Ullman

Verified Expert in Engineering

9+ Years

of Experience

Full-stack Developer

Oliver is a React expert who has worked with high-profile clients such as Facebook, Chess.com, and Diem and a full-stack developer who brings energy and intelligence to any team he joins. Oliver's clients value his rapid pace of development and high throughput. His love of programming comes from writing clean, elegant, and scalable solutions.

Previously at

Bogdan Beca

Verified Expert in Engineering

24+ Years

of Experience

CRM Solution Architect

Bogdan has 24+ years of hands-on experience with enterprise-level systems, delivering tens of large projects for top organizations in energy, pharma, telco, e-commerce, banking, and the public sector. As a solutions architect, Bogdan can drive a solution from concept to production or provide end-to-end POCs (or MVPs) regarding solution architecture, design, development, and release pipelines.

Previously at

Savannah Enright

Verified Expert in Product Management

20+ Years

of Experience

Product Manager

Savannah is a seasoned customer experience (CX) strategist and innovation consultant with more than 20 years of experience leading innovation, strategy, and design projects and teams. Previously of Fjord and BCG, she excels in transforming products and experiences to meet modern consumer expectations. Savannah's work spans industries and levels of seniority, where she leads user research, crafts actionable business strategies, and develops innovative concepts across the entire customer journey.

Previously at

Seema K Nair

Verified Expert in Engineering

21+ Years

of Experience

QA Engineer

Seema brings more than 21 years of software testing and quality assurance expertise to the table. She has substantial experience with manual testing and the test automation of web and mobile applications. Seema is a certified Scrum master, an IBM-certified Db2 professional, and an AWS-certified solutions architect comfortable with Agile and Waterfall approaches. Her in-depth knowledge of API and performance testing delivers excellent results.

Previously at

On-demand Talent and Teams

30,000+ vetted professionals, ready to deploy individually or in teams.

Solutions Architect

Data and Analytics Architect

Integration Developer

Salesforce Developer

Digital Transformation Consultant

ERP Expert

SAP Consultant

Cloud Security Architect

QA Engineer

Verified Expert in Engineering

24+ Years

of Experience

Solutions Architect

Piotr is a blockchain architect, software developer, and technical lead with 24+ years of experience working with CERN, Motorola Solutions, universities, and more. He has led projects, served as a Scrum master, and developed and delivered complex web and mobile solutions, including business and technical requirements, architecture, third-party API integrations, data acquisition, and processing for BI. Piotr co-developed the pan configuration language and holds a doctorate in computer science.

Previously at

Verified Expert in Engineering

20+ Years

of Experience

Data and Analytics Architect

Mohammad has 20+ years of experience in building and maintaining large-scale distributed systems, data platforms, and machine learning for a variety of industries. With his master’s degree in computer science from USC, Mohammad has a technical understanding that is deeply rooted. He has excellent communication skills and business understanding. Because of his great interpersonal skills, it is a pleasure to work with him.

Previously at

Verified Expert in Engineering

20+ Years

of Experience

Integration Developer

Mahesh is an IT service professional with more than 20 years of end-to-end presales and delivery experience on large complex assignments involving the integration of multiple platform technologies. He has worked in various industries, including government and finance. Mahesh holds a bachelor’s degree in electronics and communication and is a Google Cloud Certified Professional in cloud architecture, data engineering, network engineering, and security engineering.

Previously at

Verified Expert in Engineering

12+ Years

of Experience

Salesforce Developer

Nirmala is a nine-time certified Salesforce application architect and integration architect with more than 12 years of experience in Salesforce applications development as an architect or lead developer for Salesforce projects. She has worked extensively on Salesforce development, customization, and integration, Salesforce Lightning Platform, Sales Cloud, Service Cloud, Community Cloud, Pardot, Marketing Cloud, Financial Services Cloud, and nCino.

Previously at

Verified Expert in Project Management

28+ Years

of Experience

Digital Transformation Consultant

Mihai is a seasoned program and project manager and transformation consultant with extensive experience in digital transformation, process optimization, automation, software development, and technology integration. He strategically navigates change and manages senior relationships within Tier-1 banks, global blue-chip companies, and startups. He restructures troubled projects, solves problems, and devises operating models and Agile methodologies, fostering collaboration and long-term success.

Previously at

Verified Expert in Management Consulting

20+ Years

of Experience

ERP Expert

Juan is a trusted financial advisor and a hands-on people coach focused on achieving financial excellence and business growth. For more than 20 years, she has supported business revival and upscaling, delivering million-dollar EBIT improvements. Juan's ability to effectively lead economic transformation results from her Lean Six Sigma background. Her freelancing empowers Juan to help a diverse range of businesses to grow effectively and sustainably.

Previously at

Verified Expert in Engineering

13+ Years

of Experience

SAP Consultant

Pierre is a senior SAP consultant with 13+ years of experience using SAP technologies in international projects across a diverse range of industries. With a solution-driven approach and a deep understanding of SAP architecture in both ECC and SAP S/4HANA environments, he has participated in numerous development and implementation projects, including large-scale custom developments and end-to-end SAP S/4HANA life-cycle implementations.

Previously at

Verified Expert in Engineering

13+ Years

of Experience

Cloud Security Architect

Saeid is a cloud security architecture enthusiast with 13+ years experience in software engineering, secure cloud-based architecture, microservices, and applications using modern technologies. Most recently, Saeid has digitalized passport services for the Canadian government with a secure and scalable cloud enterprise solution.

Previously at

Verified Expert in Engineering

18+ Years

of Experience

QA Engineer

Christina is a senior QA engineer with expertise in test automation, test management, and manual testing for web and mobile applications. She has created test automation frameworks from the ground up using Selenium WebDriver in several projects as well as automating API testing using REST Assured and Postman. With experience in both private and public sectors, Christina has worked with large, medium-size, and small startup companies.

Previously at

Optimize Your Business With Toptal’s App and Integration Services

Get a Free Consultation Now

Optimize Your Business With Toptal’s App and Integration Services

Why organizations choose us

Toptal in Action

Discover the cutting-edge benefits our clients enjoy with the global Toptal network.

Casper leverages Salesforce Commerce Cloud integration to enhance its customer experience.

Challenge: As a predominantly digital brand, Casper needed to update its commerce platform to deliver a consistent yet personalized buying experience for shoppers across all channels. Casper’s ideal solution was to add Salesforce Commerce Cloud to its existing Salesforce suite. However, Salesforce Commerce Cloud was a new service for the company. A fast and seamless integration would require specialized knowledge and consultative support.

Solution: Without the needed technical expertise in house, Casper sought out Toptal to simplify the platform integration and help construct a headless architecture for omnichannel versatility. The new Salesforce Commerce Cloud solution delivers a unified commerce experience across all devices, with a flexible ecosystem for building customer-centric experiences.

Impact: Casper’s infrastructure design now powers a hassle-free shopping experience that feels natural and voluntary for the buyer.

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.

Microsoft — Newsweek's Most Reliable Companies in America 2026 ranking. Toptal is ranked #11, the highest-ranked professional services firm.

IBM — Newsweek's Most Reliable Companies in America 2026 ranking. Toptal is ranked #11, the highest-ranked professional services firm.

See the Most Reliable Companies in America

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.

See the Most Reliable Companies in America

COLLABORATION THAT WORKS

How to Partner With Toptal for Your App and Integration Services Needs

Toptal matches you directly with global technology leaders from our network in hours—not weeks or months.

Talk to an App and Integration Lead

A leader from our team will work with you to understand your goals, technical needs, and team dynamics.

Get the Perfect Solution

From full end-to-end delivery to team augmentation—choose the best model for your business and project needs.

The Right Fit, Every Time

Work with Toptal’s App and Integration Services team on a trial basis (pay only if satisfied), ensuring that your needs are ultimately met.

Maximize your business performance with Toptal’s App and Integration Services

Get a Free Consultation Now

NEED WORLD-CLASS APP AND INTEGRATION SERVICES FAST?

Schedule a Call With Toptal’s App and Integration Services Team Today

Robert Orshaw

CEO, Technology Services

As Toptal’s CEO of Technology Services, Robert leads strategy and operations across our technical services portfolio, spanning AI, automation, and operations. He previously served as Deloitte’s Managing Director & Chief Commercial Officer, transforming its Cloud Operate and Engineering business into a multibillion-dollar operation. He held senior roles at IBM and Velocity, co-founded Corio, and was CIO for two Fortune 500 companies.

Get a Free Consultation Now

OUR THOUGHT LEADERSHIP

Explore Insights From the App and Integration Services Field

Read the latest articles and resources to keep you current on emerging trends in enterprise technologies.

Make Your App Profitable: Leverage Mobile Analytics

Building a mobile app isn't cheap—and the harsh reality is that most apps fail. Find out how to leverage fundamental analytics metrics to make sure your app actually turns a profit.

Matthew Knippen

Verified Expert in Engineering

Since 2008, Matthew has built more than 60 iOS apps using Swift and Objective-C. He is best known for taking products from idea to App Store in under eight weeks. He holds a bachelor’s degree in computer science from the Illinois Institute of Technology. His core strengths include native iOS development as well as product development and management.

Expertise

iOS Mobile App

Previously at