Modernizing a legacy system without stopping the business
Software engineering from New Delhi, for teams in India and abroad
Eryon designs and engineers custom digital products, enterprise applications and business systems built around real operational needs — from first architecture to long-term scale.
The screenshots are from systems we have designed and engineered.
Internal platforms that encode how your business runs — approvals, scheduling, projects and payroll.
Multi-role dashboards and portals for staff, partners and customers.
iOS and Android apps connected to the systems behind them.
Multi-tenant products with billing, onboarding and room to grow.
One system of record for sales, operations, people and money.
Fast storefronts with the order operations to support them.
01 — Understand
We sit with the people who do the work, map the process as it runs today and find where time, money and data are lost.
02 — Design
Roles, workflows and a data model that reflect your business — designed and tested with your team before a line of production code.
03 — Engineer
Clean architecture, automated tests on critical paths, security in the data model and infrastructure you own.
One team for architecture, product, infrastructure and support — so nothing is lost between hand-offs.
From first release to a product that serves many customers reliably.
Web and mobile applications built for daily operational use.
Environments, pipelines and monitoring that make releases routine.
Pipelines and reporting you can trust.
APIs and events connecting the tools you already run.
Rule-based work taken off your team's desk.
Access control and hardening designed in, not bolted on.
Interfaces designed around real tasks, with the engineers who build them.
Three systems from manufacturing, healthcare and education — the problem, the system we built and what changed for the business.
Sales and inventory CRM for a stone distributor
Workforce management for hospital staff
School ERP with web and mobile apps
01
Workshops with the people who run the process today. We map how work actually moves, where it stalls and what the system must never get wrong.
02
A written scope: users and roles, core workflows, integrations, non-functional requirements and a release plan you can hold us to.
03
Data model, service boundaries, hosting, security model and the trade-offs behind each choice — reviewed with your team before code starts.
04
Short sprints with a working demo every week. Code review on every change, automated tests on the paths that carry money or data.
05
Functional QA, role-by-role acceptance, performance checks and a security pass before anything reaches production users.
06
Staged rollout, monitoring and a support window. Then the backlog of improvements that only real usage reveals.
Part of our team's working stack — see the technology page for where each has been used in delivered work.
01
Event-driven services, row-level security, multi-tenant data models — we make architecture decisions deliberately and write them down.
02
We start with how work moves through your organisation, not with a feature list. The software follows the operation.
03
Working software demonstrated every week, a written scope, and estimates with their assumptions attached.
04
You own the code and infrastructure. We stay for support and the improvements real usage reveals — or hand over cleanly.
Custom software for businesses: web applications and portals, mobile apps, SaaS products, CRM and ERP systems, e-commerce platforms, business automation, data dashboards and the cloud infrastructure they run on.
It depends on the number of users and roles, workflows, integrations and design depth. We start with a short discovery and then give a written estimate for a clearly scoped first release, so the budget is agreed before development begins.
A focused first release usually takes a few months. We plan releases so your team uses part of the system early, and you see working software every week.
We are based in New Delhi and work with clients in India, the USA, the UK, the UAE, Australia and Canada, delivering remotely with agreed working-hour overlap.
Mainly React, Next.js and TypeScript on the front end; Java Spring Boot, Node.js and Python on the back end; PostgreSQL, MongoDB and Redis for data; React Native and Flutter for mobile; and AWS, Azure or Google Cloud with Docker and Kubernetes.
Yes. Every release includes a support period, and most clients continue with an agreement for monitoring, fixes and planned improvements.
Let's turn the idea into a system your business can actually use.
