Software development
Custom web, mobile, SaaS, cloud, ERP, MVP, and internal business applications built around real workflows, clean architecture, and long-term maintainability.
Software, AI, cloud, automation, and dedicated teams
Result-driven software development company for ambitious teams
Master Union designs, builds, and scales high-quality software on time and on budget. We help companies launch products, modernize legacy systems, add AI, automate operations, and hire senior engineering capacity when speed matters.
Our software development services
Everything you need to build, improve, and scale digital products.
From consulting to delivery, we cover the full software lifecycle. Bring a product idea, an underperforming system, or an overloaded engineering roadmap.
AI and advanced technologies
AI consulting, data pipelines, machine learning, process automation, knowledge assistants, agent-ready systems, blockchain, and integrations that make emerging tech useful in production.
Testing, support, and modernization
Manual and automated QA, security testing, DevOps, cloud migration, data migration, legacy modernization, and continuous product support after launch.
Dedicated teams and staff augmentation
Senior engineers, product builders, AI specialists, QA, DevOps, and delivery talent who can join your roadmap quickly and work as part of your team.
AI delivery
Cloud apps
Fintech
Automation
Web3
Product teams
Technologies
Modern engineering stack for serious product work.
We choose tools based on reliability, speed, hiring market, security, and the systems your company already depends on.
AI and data
LLMs, agents, RAG, data engineering, analytics, business intelligence, automation, and model integration.
Front-end
React, Vue, Angular, TypeScript, design systems, dashboards, portals, and rich web applications.
Back-end
Node.js, Python, Go, Java, .NET, APIs, event systems, databases, and secure business logic.
Mobile
iOS, Android, React Native, Flutter, mobile backends, subscriptions, notifications, and app store delivery.
Cloud
AWS, Azure, GCP, serverless, containers, observability, CI/CD, scaling, and cost control.
ERP and CRM
Salesforce, HubSpot, Odoo, custom CRM workflows, reporting, and operations integrations.
Blockchain
Smart contracts, wallets, token systems, Solana, Ethereum, privacy tooling, and crypto product infrastructure.
Security
Access control, data protection, secure integrations, audit trails, testing, and production monitoring.
Industries
Domain knowledge for software that has to fit the business.
We work across operationally complex industries where speed, security, integrations, and process clarity matter.
Finance and fintech→
Healthcare and life sciences→
Retail and eCommerce→
Logistics and transportation→
Manufacturing→
Real estate and construction→
Marketing and advertising→
Crypto and blockchain→
Portfolio examples
Software outcomes we can help you ship.
Every engagement is scoped around a business result: more throughput, faster launch, cleaner data, stronger product capability, or less operational drag.
Finance OS
$4.8M
AI finance operating system
Unified workflows, reporting, and automation for teams handling fiat, crypto, approvals, and operational finance.
Live routing98%
Intake
AI route
Resolved
Customer operations automation
Intake, qualification, routing, document generation, and support workflows connected to the tools the team already uses.
SaaS build
Modern SaaS product build
Product strategy, UX, engineering, payments, analytics, infrastructure, QA, and launch support from one senior team.
How we work
A practical delivery process from idea to production.
No vague transformation theater. We clarify the goal, choose the right implementation path, ship working software, and keep improving it after release.
Discovery
We review your goals, workflows, technical context, risks, stakeholders, and existing systems.
Solution design
We define scope, architecture, team shape, milestones, integrations, and the first production-ready release.
Development
We build in short cycles with regular demos, clear decisions, code reviews, QA, and transparent progress.
Launch
We deploy, monitor, document, train users where needed, and make sure the system is stable in real use.
Scale
We keep improving performance, user experience, automation coverage, security, and product capability.
Contact us
Tell us what you need to build.
Send a short note about your product, system, team gap, or AI opportunity. We will reply with the clearest next step.
Email: sergej@masterunion.tech
Location: Kanalska 7, Novi Sad, Serbia
Good fit: custom software, AI implementation, automation, web and mobile apps, blockchain systems, and senior engineering capacity.