Kotlin has features that make it an ideal language for back-end development. Learn what these features are and how you can use them to create high-performing systems.
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Backend Development Services – Build Scalable, High-performance Systems
Create a stronger technical foundation for your applications with Toptal’s Backend Development Services. Our backend engineers build server-side systems that process data efficiently and keep applications responsive as demand increases.
Get a Free Consultation NowClients Served
35,000+
Total Vetted Professionals
30,000+
Toptal Total Projects Delivered
85,000+
Years in Business
15+
TRUSTED BY LEADING BRANDS
Our Services
Toptal Backend Development Services
Handle complex backend requirements with expertise spanning new development and system integration. Toptal’s backend engineers work across languages, frameworks, databases, and cloud environments to select an approach that fits your application’s technical requirements.
API Development
Create REST and GraphQL APIs that give applications a clear and dependable way to exchange data with internal and external services.
Database Design
Structure relational and NoSQL databases for better storage and retrieval while accounting for growing volumes of application data.
Backend Architecture
Plan the server-side structure of your application with an architecture designed for maintainability and future growth.
Microservices Development
Separate complex applications into focused services, making individual components easier to update and deploy.
Third-party System Integration
Connect your back end with third-party tools such as payment systems and data providers for reliable information exchange.
Cloud Backend Development
Develop cloud-based back ends with computing resources tailored to your application’s performance and traffic demands.
Backend Authentication and Security
Strengthen backend security with authentication and access controls that limit sensitive data and system functions to authorized users.
Performance Optimization
Improve response times and prepare applications for heavier traffic by finding and addressing backend performance bottlenecks.
Data Pipelines and Processing
Move and transform application data through pipelines built to handle growing volumes and complex processing needs.
CMS and Admin Panel Development
Create CMS and admin tools that let internal teams manage content and user accounts without making changes directly in the backend.
Backend Migration and Modernization
Update aging backend systems with modern technologies while planning migrations to limit disruption to existing applications.
Backend Maintenance and Support
Keep backend systems current after launch with monitoring, software updates, and technical support when issues arise.
Looking for guidance about the perfect backend development service for your needs?
Get a Free Consultation NowPARTNERSHIP THAT WORKS
How We Deliver Backend Development Services
Our backend development experts, with 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 goal is to build a new API or service, improve backend performance as traffic grows, or modernize a legacy system.
4
Deploy
Toptal will get to work, tracking quality assurance, handling project management, and maintaining the delivery schedule.
Robert Orshaw 
CEO, Technology Services
CEO, Technology ServicesAs 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.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
CUSTOMIZED SOLUTIONS
Backend Development Solutions That Deliver Value
Toptal delivers leading backend development 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
Back-end Developer
Software Engineer
Back-end Developer
Software Engineer
Cloud Architect
Database Developer
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
Britney Bogard
Verified Expert in Engineering
11+ Years
of Experience
Back-end Developer
Britney has extensive experience utilizing the AWS ecosystem of tools to build reliable, scalable, and expansive web services. She excels at turning ambiguous use cases into detailed technical requirements. Britney joined Toptal to work with companies that make data-driven decisions and value the delivery of functional, tested, and quality code over all else.
Previously at
Martun Karapetyan
Verified Expert in Engineering
14+ Years
of Experience
Software Engineer
Martun has over 14 years of experience as a software engineer, mainly working on algorithm-heavy applications with C++. He's worked for notable companies like Google and Mentor Graphics and has successfully delivered several challenging freelance projects. He loves innovating and delivering incredible products with the highest code quality. Martun communicates exceptionally well and does his best to over-deliver on every project.
Previously at
Frank Ji
Verified Expert in Engineering
13+ Years
of Experience
Back-end Developer
Frank is a seasoned professional currently working as a software engineer at Amazon. He previously served as the VP of engineering at Penfield.AI, a Toronto AI startup pioneering in empowering human-machine intelligence in the cybersecurity space. Frank also worked as a senior engineer at Meta's enterprise trust organization, helping to build Facebook's privacy and compliance software infrastructures. He also worked on IBM WebSphere Java Runtime, which powered many Fortune 500 Java applications.
Previously at
Jongwook Kim
Verified Expert in Engineering
22+ Years
of Experience
Software Engineer
With more than 22 years of experience, Jongwook develops simple and robust software that delivers value to customers. Jongwook believes that showing the client working software first and evolving the product together is important to the development process, so he welcomes changing requirements. Jongwook enjoys problem-solving and communicating with motivated individuals.
Previously at
Fabrice Triboix
Verified Expert in Engineering
26+ Years
of Experience
Cloud Architect
Fabrice is a DevOps engineer with extensive experience in AWS, Kubernetes, and Terraform. He is highly focused on automation using CI/CD and infrastructure as code, always opting for the simplest solutions to complex problems. Fabrice has worked with clients such as Cisco, Topps, MyDocSafe, Armedia, HMRC, and the UK Home Office, as well as medium-size companies and startups. His greatest joy comes from seeing his work being utilized in production and making a positive impact on his clients’ businesses.
Previously at
Berenice Harillo
Verified Expert in Engineering
20+ Years
of Experience
Database Developer
Berenice is a senior database engineer with solid experience working with relational and non-relational databases on-premises and in different clouds. She excels in managing massive data sets with various tools and dealing with performance issues. As a database expert, Berenice enjoys migrating it to the cloud and creating models and ETL in data warehousing.
Previously at
On-demand Talent and Teams
30,000+ vetted professionals, ready to deploy individually or in teams.
Back-end Developer
Data Engineer
DevOps Engineer
Back-end Developer
DevOps Engineer
Database Developer
Back-end Developer
Data Engineer
.NET Developer
Verified Expert in Engineering
21+ Years
of Experience
Back-end Developer
Ken started C/C++ programming in secondary school in order to make computer games. This enabled him to land internships at NASA and Microsoft while attending Virginia Tech. After graduation, he worked at Google for 10 years as a member of the Chrome and Search teams, developing cross-platform desktop applications, web apps, and distributed systems.
Previously at
Verified Expert in Engineering
35+ Years
of Experience
Data Engineer
Davide is a data engineer certified by Microsoft Azure and AWS and an experienced data architect. He is the author of "Business Intelligence with MicroStrategy Cookbook." With a career spanning two decades in data warehousing, using relational and NoSQL databases, Davide's job consists of loading, transforming, and visualizing large amounts of data. Lately, he has been working on Cloud Big Data projects with Fortune 500 clients.
Previously at
Verified Expert in Engineering
23+ Years
of Experience
DevOps Engineer
Michelle focuses on scaling and prototyping projects and starting initiatives quickly. She uses automation, process streamlining, and lean methodologies to deliver consistent results efficiently. Michelle has a background as a web developer and systems/DevOps engineer, with more than 23 years of professional experience at companies ranging from 10 to more than 100,000 employees.
Previously at
Verified Expert in Engineering
14+ Years
of Experience
Back-end Developer
Javier loves challenges and new technologies. He has a strong background in C++, Python, and the vast cloud DevOps experience, and is AWS certified. He has worked with large companies such as Intel and Amadeus, and for several startups and research-based companies. Javier is currently based in France and can communicate in Spanish, English, and French.
Previously at
Verified Expert in Engineering
15+ Years
of Experience
DevOps Engineer
Bartłomiej is a DevOps engineer with more than 15 years in this field. His overall experience in IT began with the role of Linux sysadmin for companies like IBM. His DevOps and IaC Terraform journey started with migration to AWS of the TomTom map-making application. He started using Kubernetes while working with IDEMIA and developed this skill with PMI and Vizlib. With the last-mentioned company, he also gained over a year of experience with GCP.
Previously at
Verified Expert in Engineering
44+ Years
of Experience
Database Developer
Rade has four decades of experience with Oracle products (database, tools, applications, middleware, and business intelligence). With so many years of hands-on, in-depth experience under his belt, it can safely be said that Rade is a world-class expert in Oracle databases, SQL tuning, and development. Recently, he's been working on Oracle Fusion Cloud Application implementations.
Previously at
Verified Expert in Engineering
12+ Years
of Experience
Back-end Developer
Dominik is a technological leader and product engineer with more than 12 years of experience. He has a strong background in CI/CD, DevOps, and creating extraordinary end-user-centric products. Dominik has helped accelerate the cloud transformation at SAP by scaling CI/CD for more than 20,000 developers. He is a passionate team leader, speaker, coach, and mentor.
Previously at
Verified Expert in Engineering
30+ Years
of Experience
Data Engineer
Gabriel more than 30 years of experience installing, managing, and using SQL, NoSQL (key-value, columnar, graph), time-series, spatial, in-memory, and cloud databases. He's worked with 10TB OLTP databases, 10TB data warehouses, tables with 10+ billion rows, and databases with 10,000+ tables.
Previously at
Verified Expert in Engineering
23+ Years
of Experience
.NET Developer
Tiago is a full-stack developer with 23 years of experience. His preferred technologies are Angular 2+ on the front end, C# .NET on the back end. He's experienced in ideating, managing, and developing solutions from the ground up. He's also a certified scrum master/product owner and agile methodologies enthusiast with experience managing scrum teams. He's worked for both startups and notable companies like HP and Dell.
Previously at
Looking for guidance about the perfect backend development service for your needs?
Looking for guidance about the perfect backend development 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.
Why organizations choose us
Toptal in Action
Discover the cutting-edge benefits our clients enjoy from the global Toptal network.
Toptal cuts API response times by more than 90% for global agritech company.
Challenge: The company’s employee data management system was struggling to process thousands of employee relationships efficiently, with API response times reaching 20-25 seconds. The company needed to improve performance while preparing the system to handle future growth.
Solution: Toptal first optimized the company’s Amazon Neptune setup using Gremlin, cutting response times by 50%. The team then recommended and implemented a migration to Neo4j, using new indexing strategies and incremental testing to further improve API performance and scalability.
Outcome: API response times fell from 20-25 seconds to just 1-2 seconds, exceeding the company’s expectations. The new Neo4j system also gave the company a more scalable foundation for handling growing data demands.
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.
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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 Backend Development Field
Read the latest articles and resources on backend development, with practical insights into building and maintaining the systems behind modern applications.
Verified Expert in Engineering
Vitaly is a full-stack developer who has extensive experience in creating apps with Node.js, React, and .NET, including the maintenance of a healthcare platform with nearly 20 million users.
Verified Expert in Engineering
Marcos has 17+ years in IT and development. His passions include REST architecture, Agile development methodology, and JS.
Backend Development Related Offerings
Explore Related Services and Roles
Pair Toptal’s Backend Development Services with related competencies to effectively tackle your business challenges.
Custom Software Development ServicesAPI Development ServicesNode.js Development ServicesPHP Development ServicesPython Development ServicesWeb Application Development ServicesFull-stack Development ServicesEnterprise Software Development ServicesSaaS Development ServicesArtificial Intelligence ServicesLLM Development ServicesCRM Development ServicesERP Software Development ServicesEnterprise Application Integration ServicesData Engineering ServicesDevOps ServicesCloud Infrastructure Services
Looking for guidance about the perfect full-stack development service for your needs?
Get a Free Consultation Now