Custom software development services

Relevant is a custom software development company trusted to deliver impactful, custom-built solutions to industry leaders worldwide. With a team that brings both deep expertise and strategic vision, we craft custom software that does more than meet technical requirements — it becomes a key force behind your business’s growth.

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Custom software services we provide:

Software product development

Drive product innovation with a full-spectrum software development approach focused on your business goals and objectives. We take products from concept to deployment, incorporating market insights and user needs into each stage. With expert attention to quality and scalability, our software products deliver measurable value, strong performance, and ongoing adaptability as your market evolves.

SaaS app development

Transform your SaaS vision into a robust, scalable platform with our custom software development services. We architect each app with cloud-native principles and optimized infrastructure designed to scale effortlessly while maintaining uptime and robust data integrity. Our SaaS solutions ensure peak performance under heavy loads, adhere to stringent security requirements, and deliver a seamless user experience across devices.

Web development

Create an impactful web presence with our comprehensive web development service. Our web application development encompasses the entire lifecycle of creating a secure, powerful platform that meets your business needs. From in-depth technology consulting and user-centered design to scalable back-end and responsive front-end development, we ensure every element aligns with your goals.

Mobile app development

In mobile app development, we prioritize a user-centered approach and integrate features like GPS, augmented reality (AR), voice recognition, etc. Each app we build, whether for iOS, Android, or both, delivers a seamless, intuitive experience crafted to maximize engagement and strengthen brand loyalty.

Enterprise software development

Achieve seamless integration and efficiency across complex enterprise processes. Our enterprise software development service encompasses every aspect needed to create resilient, adaptable solutions for complex business operations. Each system aligns smoothly with your infrastructure to enhance resource use, raise productivity, and improve operational efficiency across departments.

Software development for startups

Turn your idea into reality with our startup-focused development. Our approach to startup development centers on agility, scalability, and strategic focus. We work closely with founders to define essential features that validate the concept, create early traction, and attract investors. Each solution is engineered to adapt as your market insights grow, which ensures you have a flexible, growth-ready foundation from the start.

MVP development

Get your product to market swiftly with a purpose-built MVP that includes only the most impactful features. Our team defines key features to validate your concept, guiding each step to ensure rapid deployment and measurable impact. From early-stage MVPs to full-scale applications, our custom development services help you attract users, secure funding, and position yourself for growth in competitive markets.

API development

Build a future-ready system with APIs crafted for secure connections, stability, and high performance. Our API development emphasizes secure connections, high performance, and seamless integration, which enables your custom software to interact smoothly across third-party platforms. Each API supports complex interactions that enhance operational efficiency and user experience within multifaceted systems.

Desktop application development

Equip your organization with custom desktop software that meets demanding operational needs. We offer full-cycle desktop development for Windows, macOS, and Linux, with support at every phase, from planning to launch. Our team ensures your solution aligns with the budget, meets deadlines, and delivers the functionality needed to enhance productivity and streamline critical workflows.

Software development consulting

Our custom software development consulting supports each development phase with strategic guidance, from requirements gathering to deployment. We focus on risk mitigation, precise planning, and technical alignment to ensure your product meets specifications, budget, and timeline, delivering a solid foundation for future growth.

Third-party software integration

We specialize in third-party software integration to remove compatibility issues and maintain system integrity. Our integration service includes end-to-end planning, execution, and thorough tests to ensure seamless communication between applications and optimized workflows, all without disruption to your current operational structure.

Legacy software Modernization

We extend the life of your outdated systems by upgrading their core functionalities and aligning them with current technology. Our software modernization services improve system performance, security, and adaptability, and offer cost-effective solutions that maximize your assets without full replacement.

Other development services we provide:
  • • Full-stack application development
  • • Custom UI/UX design and Ideation
  • • Code review
  • • Project management consulting
  • • DevOps services and consulting
  • • Cloud migration
  • • Compliance assessment
  • • Quality assurance and software testing

Why Relevant as a custom software development company?

01

Comprehensive in-house services

As a leading custom software development company, we handle every phase of your project — strategic planning, business analysis, design, development, deployment, and support — all under one roof. This in-house approach guarantees seamless collaboration, quality consistency, and efficient communication from concept to launch.

02

Broad technological expertise

Our expertise spans the latest technologies - the Internet of Things (IoT), AI, machine learning, cloud-based applications, big data, computer vision, and cybersecurity. This broad skill set allows our developers to build custom software solutions aimed at meeting the specific challenges, regulatory standards, and technical requirements of your industry.

03

Top-tier tech talents

We handpick the top 1% of talent, building a team of expert software engineers, designers, and project managers who blend technical expertise with innovative ideas. Each custom software developer is focused on achieving the goals of your project, which ensures that your custom software development services drive your business forward.

04

Award-winning partnerships

With over 200 global clients, 100+ active projects, and a 98% retention rate, our custom software development firm offers exceptional services that consistently earn recognition. Our award-winning custom software solutions help clients achieve measurable success in competitive markets and establish long-term collaborations.

05

On-time, on-budget delivery

Our disciplined planning and precise execution ensure that custom software development projects are completed on schedule and within budget. Through streamlined workflows and effective communication coupled with proactive risk management, we help you avoid delays and unexpected costs, keeping your software development smooth from start to finish.

06

Stable teams for long-term success

With an 80% employee retention rate, we offer stable, dedicated teams that build in-depth knowledge of your project. This continuity strengthens client relationships, supports growth, and enables our custom software development company to adapt solutions as your needs evolve, delivering reliable, long-term success.

Let's build something exceptional together. Your journey starts with just one click!

Petro Diakiv

Petro Diakiv

Business Development Manager

Anna Dziuba

Anna Dziuba

VP of Delivery

What to Expect Next?

  1. Our BizDev managers will reach out within 24 hours to dive deeper into your requirements and discuss your project idea.
  2. If needed, we'll sign an NDA to ensure your project details are fully protected.
  3. Our skilled software development experts will provide tailored advice and suggest the best development path.

Our clients’ successes

Volkswagen Genser App
Developing React Native app with gamification elements
Marketing & Advertising
Norway
View case
My Theory Test app by James May
Building #1 driving app in the UK
Edtech
UK
View case
Airthings
Visualizing air quality sensor data in a web dashboard
IoT
Norway
View case

Engagement models

Decide which model best suits your project

FAQ

Which cooperation model works best for my custom software project?

We offer flexible cooperation models to suit different needs. For example, we recommend our full-cycle development services for a complete, end-to-end solution. If you need a specialized team, our dedicated custom software developers focus exclusively on your project. Our team augmentation services provide skilled experts for businesses with an in-house team to fill in specific gaps.

How do you make sure projects stay organized, and communication is clear?

Each project is assigned experienced project managers and business analysts who act as your points of contact. They keep you updated with regular progress reports, and we often include visual snapshots to make complex updates easy to understand. We keep you closely involved in every key decision with regular check-ins, open feedback sessions, and clear communication. You’ll always be informed about each milestone, update, or challenge, so you know exactly where things stand.

How will you protect my project’s data and ensure full compliance with regulations?

Relevant integrates secure development lifecycle practices and “Data Protection by Design,” which ensures full compliance with GDPR, ISO 27001, and other critical standards for ultimate software safety. If you have particular compliance needs, we’ll address those, too, so you can feel confident that your data’s protected and fully compliant.

How do you handle support and maintenance after the software is launched?

After launch, we remain committed to your software’s success. Our team of custom software developers actively monitors its performance, steps in to fix any issues quickly, and fine-tuns functionality as needed. When your business grows or shifts direction, we’re on hand to update and enhance the software so it continues to meet your needs seamlessly and grants a competitive edge.

Can custom software work for small businesses, or is it just for large companies?

Absolutely, custom software application development is a great option for small businesses, too. Unlike off-the-shelf software, which may lack critical features, custom development addresses your specific processes and challenges. While it involves an upfront investment, the long-term benefits, such as streamlined workflows, enhanced productivity, and scalable design, make it worthwhile.

Wait!

Do you know that we helped 200+ companies build web/mobile apps and scale dev teams?

Let's talk about your engineering needs.

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