Pragmatic AI-Powered
Custom Software Development
Cross Sonic is a custom software development company that helps enterprises turn AI investment into measurable engineering results, backed by 8 years of software, cloud, data, and security delivery.
Trusted by enterprise teams:
What we do
Custom software development services covering the full product lifecycle, from AI and cloud to data, modernization, and QA.
AI-Enabled Software
Copilots, intelligent search, and forecasting embedded into products with production-grade controls.
Custom Software Development
Enterprise applications, SaaS products, and portals built by senior engineers from start to finish.
Cloud Solutions and Services
Cloud migration and DevOps across AWS, Azure, and Google Cloud, all without stopping the business.
Data and Analytics
Data platform engineering, warehouse modernisation, and BI your teams actually use.
Legacy Modernization
Replace fragile systems and connect disconnected tools while operations keep running.
QA and Security
Manual and automated testing plus the security controls production environments require.
Industries we serve
We partner with enterprises across industries to solve complex challenges through practical, scalable technology. Our domain experience shortens discovery and exposes risk before development gets expensive.
Deep expertise across your tech stack.
From modern frameworks to legacy platforms, we work with the languages, clouds, and AI tooling enterprise software runs on.
The numbers we're judged on
Every figure here comes from a client project. Ask us about any of them on a call and we'll walk you through the work behind it.
Read the case studies →- products in production since 2019, across aviation, healthcare, and fintech
- 80+
- products in production since 2019, across aviation, healthcare, and fintech
- of clients rate delivery 4/5 or higher in quarterly reviews
- 98%
- of clients rate delivery 4/5 or higher in quarterly reviews
- faster patient response for a telehealth client, with operating costs down 30% in the same year
- 45%
- faster patient response for a telehealth client, with operating costs down 30% in the same year
Client results you can measure
See how focused engineering work translates into faster operations, stronger engagement, and software teams can rely on.
Built Centralized Digital Hub, Simplified Crew and Passenger Operations
Austrian Airlines
45%
Faster Access to Crew Applications
Austrian Airlines is the flag carrier of Austria and a subsidiary of the Lufthansa Group. It is a member of the Star Alliance, one of the world's largest global airline alliances.
From Missed Messages to Massive Conversions: Automating Customer Engagement for a Retail Brand
Reflys
75%
Faster Reply Time
We helped a retail brand turn slow manual messaging into a simple automated sales system with Reflys. Customers now get instant replies, timely follow ups, and personal conversations across WhatsApp, Instagram, and Facebook.
From Messy Learning to a Thriving Procurement Hub: How Cross Sonic Powered Procurement League
Procurement League
3x
More Active Pros joining discussions
We helped Procurement League bring online training, certifications, and a busy community under one roof, which made learning and networking faster and a lot more enjoyable.
No guesswork.
Just software that delivers.
Senior engineers only
Vetted, AI-fluent senior engineers on every project, never juniors on your budget.
Teams shaped to your roadmap
From a single developer to a full dedicated team, with flexible engagement models.
Overlap with your workday
Real-time collaboration across US and European hours, with clear English throughout.
Start in days, scale anytime
Onboard a team within days, then scale up or down as your priorities shift over time.
- Software developers
- QA engineers
- UX designers
- Data scientists
- Project managers
Build your dedicated development team.
Schedule a callOur development process. Clear, fast, accountable.
Start with a discovery call.
We map your goals, constraints, and success criteria, including the team structure, timeline, budget, and skills your software project needs.
Shape the solution and team.
Within days we finalize scope, agree on an engagement model, and onboard senior engineers matched to your stack.
Build, measure, and adapt.
Development starts against agreed milestones, with transparent progress tracking, regular demos, and continuous adjustment to your priorities.
Need enterprise software built, modernized, or scaled? Let's plan your project.
Schedule a call
