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Custom IT Services

Starting something new? Wrestling with legacy tech? Or need something to scale? That’s where our custom IT services come in.

Onix is your “let’s-finally-get-this-done” team, ready to build, stabilize, or innovate your product with AI. No matter what stage you're at, we make your product faster, smoother, and smarter than it is today.

AI-powered development

Automation, analytics, and smarter workflows.

Faster time-to-market

From idea to launch.

Built to scale

Enterprise-grade architecture and senior engineers.

Seamless integration

CRMs, ERPs, booking engines, and platforms.

Rescue & modernize

Stabilize, refactor, and get your product back on track.

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Stats

Trusted by clients
worldwide

82%

of clients return with new projects

100%

of recovery workflows are AI-powered

3+

years average client retention

95%

say we uncovered issues their previous team missed

87%

of rescue audits lead to vendor change within 10 days

25+

years of software development experience

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IT services & industry-focused solutions

We help you tackle your toughest tech challenge, whether it’s building something new, upgrading an old system, or scaling your product fast.
Our professional IT services save you time, reduce risks, and boost your business growth.

Travel & hospitality software development

Want to make running your travel business easier and more profitable?

We provide travel software development services to build booking engines, reservation platforms, scheduling systems, and more, helping you automate processes, delight your users, and drive revenue growth.

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Discovery & product strategy

UI/UX design

Web development

Mobile app development

Custom software development

CRM/ERP development

24/7 support & maintenance

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Our real results speak louder than promises

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Duration:

2+ years

Team size:

8 developers

Keith Scioli

CEO and founder, Golf Live

Online Golf Coaching App

From a broken vendor handoff to a scalable platform.

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Duration:

4+ years

Team size:

9 developers

Eoin Le Masney

CTO, Vyra

Jack Dwyer

CEO, Vyra

Learning Platform Development

From MVP to a full-scale B2B solution.

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Duration:

10+ years

Team size:

10 developers

Tal Revivo

CEO and founder, Adoric

SaaS Marketing Platform

From bug-fixes to a complete product rescue.

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Duration:

3+ years

Team size:

9 developers

Ryan Rosenbaum

CPO, Phlex

Smart Swim Training Tracker

From concept to a community-loved app.

Our core expertise

Travel & hospitality software development

Travel platforms juggle a lot: bookings, availability, pricing, payments, and personalization. We build travel software solutions that take care of the hard stuff, so your users get a great experience, and your business has room to grow.

Custom booking engines & reservation systems

Scheduling & resource management tools

AI-powered personalization & recommendation engines

Fraud detection & secure payments

Legacy travel platform modernization

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We build and rescue projects with modern tech to deliver real business impact

Today’s products can’t survive on simple development alone. That’s why our IT services and solutions combine AI, automation, smart integrations, and modern engineering practices to help your business run smoothly, deliver better experiences, and stay prepared for what’s next.

AI-driven product intelligence

01
AI-driven product intelligence

We integrate intelligent features into custom software products, such as smart search, recommendations, and data-driven logic, to help automate decisions, personalize experiences, and support smarter business operations.

Generative AI & workflow automation

02
Generative AI & workflow automation

We implement generative AI within digital products and internal tools to automate content-related tasks, customer interactions, and operational workflows, helping teams work faster and reduce manual effort.

Cloud-native platforms & scalability

03
Cloud-native platforms & scalability

We design, build, and modernize cloud-native applications that are secure, resilient, and ready to scale, supporting growing user bases, high workloads, and long-term product evolution.

Smart integrations & digital ecosystems

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Smart integrations & digital ecosystems

We build and integrate APIs, third-party services, and legacy systems into cohesive digital ecosystems, ensuring reliable data flow, stable operations, and seamless user experiences across platforms.

Immersive & interactive experiences (AR / XR)

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Immersive & interactive experiences (AR / XR)

We develop immersive and interactive experiences, including AR-based apps, virtual training, and interactive demos that enhance user engagement and support more intuitive product interactions.

Intelligent vision solutions

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Intelligent vision solutions

We implement computer-vision-based features that automate visual tasks such as recognition, verification, and inspection, helping businesses improve accuracy, reduce manual work, and optimize operational processes.

Your product can do more. Make your software smarter, faster, and ready to scale with AI, automation, and advanced engineering.

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See our projects

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France

Tourism

MisterB&B travel platform – 1M+ listings in 200 countries

Solution:

We delivered custom travel software development to upgrade the outdated platform, integrate multiple third-party services, enhance search functionality, and implement a fraud detection and secure payment system.

Result:

1 million accommodations in 200 countries, 900K+ LGBTQ members, and recognition by Forbes as the “gay Airbnb.”

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Australia

Healthcare

Digital health white-label solution – 6 apps live across platforms

Solution:

Onix developed the platform from scratch, redesigned the UX, implemented a flexible task management system and an admin dashboard, and ensured the platform is scalable and customizable.

Result:

6 branded apps live on markets, faster patient self-care, and a scalable platform supporting multiple healthcare organizations.

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USA

Sports & Fitness

Fitness & nutrition platform – all-in-one coaching solution

Solution:

As a software project rescue company, Onix rebuilt the platform architecture, developed a new website and mobile apps, and implemented new functionality.

Result:

A scalable all-in-one solution that lets coaches manage clients, automate routines, and grow their business efficiently.

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USA

Beauty, Cosmetics

Cosmetics AI app – 45K products analyzed for safe skincare

Solution:

Onix built an AI-powered iOS app with a sophisticated admin panel, enhanced project architecture, ingredient database powered by ML, and a personalized skincare recommendation engine.

Result:

45,000+ products analyzed, 100K+ happy users, and a leading ingredient transparency solution.

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Explore our works

Explore how we’ve solved challenges similar to yours.

View case studies
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Our expertise across industries

At Onix, we turn ideas into results. Through custom IT services and software project rescue services, we help businesses innovate, solve challenges, and grow, no matter what you’re building.

Travel & tourism

Our travel software solutions make the traveler experience seamless, ensuring businesses stay efficient and customers stay delighted.

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Healthcare

We develop solutions that enhance patient care, streamline operations, and inform clinical decisions.

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Fitness & sports

We know what modern users expect. Our apps and platforms help users stay active, improve their performance, and retain them daily.

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Edtech

We help organizations of all sizes enhance learning, reduce manual work, and deliver a goal-oriented educational experience.

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Online scheduling & booking

We build intelligent booking and scheduling systems that streamline operations, minimize no-shows, and provide seamless user experiences for service providers and their clients.

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Fintech

We develop robust fintech software that prioritizes security, performance, and seamless user experiences for payments, analytics, and compliance.

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Testimonials

Clients rely on us as an IT services & web development company to build new solutions and fix what others couldn’t.

"Post-refactoring, the codebase became maintainable and scalable, leading to a 30% reduction in bug reports related to legacy code problems. Through proactive bug fixing, the number of critical post-launch issues was reduced by 35%, resulting in a smooth UX and fewer support requests."

Ryan Rosenbaum

CPO, Phlex Sports Co

"They took the time to make suggestions to improve my project. They are very talented and worked quickly to achieve my desired outcomes. When requesting further changes, they were very helpful and took on board what I was saying."

James Harrison

CEO, Blueberry Bagel Publishing

"The outcome of the project exceeded our expectations. Their attention to detail, deep understanding of our objectives, and innovative approach resulted in a top-notch learning management system that will serve our needs and those of our HCP learners exceptionally well."

Sandy Breslow

Owner and Investor, NexusMedX

"Onix has successfully reduced the number of issues in Crashlytics and improved the app's stability, earning positive feedback from end customers. The level of communication felt as though they were an extension of our team."

Peter Altholz

CEO, Bar Crawl Nation LLC

Partner with Onix in the way that works best for you

As a custom IT solutions and services company, we offer flexible options for collaboration, allowing you to select the approach that best suits your goals and timeline.

01

Staff augmentation

Need extra hands? Add Onix specialists to your existing team to fill skill gaps and boost delivery speed.

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Dedicated team

Get a remote team focused solely on your project – hand-picked for your business goals and ready to manage everything from start to finish.

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Time & materials

Perfect for evolving projects. Pay only for the actual hours and resources used, while maintaining flexibility and control.

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Fixed price

Have clear requirements? We’ll provide a precise quote, timeline, and deliver your project on budget – no surprises.

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Full-process development

From idea to launch, our software development service experts cover the full cycle: design, development, QA, and support – all under one roof.

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Stuck in development chaos? Or just need a reliable start? Our experts are ready to jump in.

Blog

Insights from our experts

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Travel Website Development Cost | Guide For 2026

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Best Practices for Outsourcing Software Development in 2026

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MVP in Healthcare: How to Execute, Costs, and Major Milestones

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How to Create Your Own CRM System from Scratch?

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ERP That Works: 30 Ways to Boost Your Company

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Booking Funnel Makeover: What to Test First on Travel Sites

FAQs

How to choose the best custom software development company?

What services does Onix provide as a custom software development company?

How does Onix approach travel and hospitality software development?

Can Onix modernize or rebuild legacy systems without disrupting ongoing operations?

What makes your dedicated development teams different from typical outsourcing vendors?

Do you offer offshore software development services for US and UK companies?

How does your project rescue process work for failing or stalled products?

What industries does Onix specialize in besides travel?

How does Onix ensure high-quality engineering and timely delivery?

Can you integrate AI or machine learning into existing products?

What engagement models do you offer for startups, SMBs, and enterprises?

How do you estimate the cost of custom software development?

Can Onix help with product scaling and long-term maintenance?

How do you guarantee transparency and communication during development?

What makes Onix a reliable long-term technology partner?

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Contact us
newprojects@onix-systems.com
We are hiring
hr@onix-systems.com

SERVICES
  • VR/AR Development
  • AI Solutions Development
  • 3D Art Services
  • iOS Development
  • Web Development
  • UX Audit Services
  • Software Project Rescue Services

INDUSTRIES
  • Travel and Hospitality Software
  • Sustainable Travel Development
  • Online Scheduling and Booking
  • Healthcare Software Development
  • Fintech Solutions Development
  • EdTech Software Development Services
  • Sports & Fitness App Development
  • Custom LMS Development

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  • The Onix Story
  • About Ukraine
  • Referral Program
  • National Holidays

Case Studies

Design portfolio

Blog


Travel
  • How to Build a Travel Mobile App: Features, Tech, and Costs
  • Travel APIs: Types, Benefits, Best APIs &How to Choose
  • How to Choose a Payment Gateway for Travel Businesses?
  • Why and How to Build an Automated Travel System in 2025
  • Travel Fraud Prevention: Protect Your Business
  • A Travel Business's Guide to Seamless Migration

Healthcare
  • Healthcare CRM Development: Key Features & Cost
  • AR & VR in Medical Training: Use Cases & Implementation
  • MVP in Healthcare: How to Execute, Costs, and Major Milestones
  • How to Develop a Telemedicine App: Tips, Features & Costs
  • Healthcare Chatbots: 7 Ways They're Disrupting the Sector
  • Why and How to Achieve Interoperability in Healthcare IT

AI Development
  • How AI is Transforming CRM – And What It Means for You
  • Hand Tracking and Gesture Recognition Using AI
  • Biases in Artificial Intelligence: How to Detect Bias in AI Models
  • Deepfake Threats: How to Protect Your Business?
  • AI Agents: Examples, Use Cases, and Development Basics