Service
Custom Enterprise Applications
Secure web, mobile, and internal applications built around exact enterprise workflows.
Overview
Many teams run critical workflows through spreadsheets, email approvals, disconnected systems, and manual reporting. That works until volume grows, audits become harder, and small mistakes start affecting customers or management decisions.
We translate business processes into secure, maintainable applications with clear data models, role-based access, workflow states, dashboards, audit trails, and integration points. The goal is practical software that teams can actually adopt.
Custom applications give your organization control over how work moves, how data is captured, and how decisions are made. Teams reduce repetitive effort, leadership gets cleaner visibility, and operations become easier to scale.
We design applications for Sri Lankan and regional organizations that need secure, maintainable systems aligned with local operations and global standards.
Start with a discovery session. We will map your current workflow, define the first valuable release, and create a roadmap for a secure enterprise application that can grow with your organization.
Why teams choose Turn Global
- Business-process-first application design
- Secure architecture with role-based access
- Maintainable code and clear release planning
- Integration-ready systems for enterprise environments
Capabilities
What this service covers
7 areas we deliver under Custom Enterprise Applications. Open any of them for the full scope and deliverables.
Web Application Development
Custom web applications built with modern frameworks, secure authentication, and production-grade architecture.
We build custom web applications that handle real business load without breaking. From single-page dashboards to multi-module platforms, our team focuses on maintainable code, fast page loads, and secure data handling. Every project is engineered for the browser, the server, and the long-term roadmap.
Modern Frameworks, Built for Performance
We develop with React and Next.js for the front end and Node.js or .NET on the back end, choosing the stack that fits your team and infrastructure. Server-side rendering and static generation keep initial loads fast and improve search visibility, while client-side hydration delivers a responsive interface. We structure components for reuse, enforce type safety with TypeScript, and set up bundling so the application stays quick as features grow. The result is a codebase your developers can extend confidently.
Authentication, Authorization, and Security
Access control is designed in from the start, not bolted on later. We implement secure authentication using session tokens or OAuth and OpenID Connect, with role-based permissions that map to how your organisation actually works. Sensitive data is encrypted in transit and at rest, inputs are validated server-side, and we guard against common risks such as injection and cross-site scripting. For regulated environments we add audit logging and configurable session policies so compliance teams have the controls they expect.
Integration With Your Existing Systems
Most web applications need to talk to other software. We connect your application to internal databases, ERP and CRM platforms, payment gateways, and third-party APIs through clean, documented interfaces. Where real-time updates matter we use WebSockets or server-sent events so users see changes immediately. We handle data migration carefully, validating records during transfer, and we build integration layers that isolate external dependencies so a vendor change never forces a rewrite of your core application logic.
Deployment, Monitoring, and Handover
We ship to cloud platforms such as AWS, Azure, or your own infrastructure using automated pipelines that run tests before every release. Environments are separated for development, staging, and production so changes are verified before they reach users. We add logging, error tracking, and uptime monitoring so issues surface early, and we document the architecture and operational runbooks. Whether your team takes over or we stay on for support, you finish with full ownership of the source code and the knowledge to run it.
Deliverables
- Responsive web application built with React or Next.js
- Secure authentication and role-based access control
- REST or GraphQL backend with documented data model
- Automated CI/CD pipeline with staging and production environments
- Monitoring, logging, and error tracking setup
- Technical documentation and source code handover
Mobile App Development (iOS & Android)
Native and cross-platform mobile apps for iOS and Android, built for performance and store approval.
We design and build mobile apps for iOS and Android that feel native, run smoothly, and pass store review the first time. Whether you need a customer-facing app or a tool for field staff, we handle the full journey from design through App Store and Play Store publishing. Our focus is reliability on real devices, not just demos.
Native Builds for iOS and Android
For apps that demand the best performance and tight platform integration, we build natively with Swift for iOS and Kotlin for Android. Native development gives you smooth animations, fast startup, and full access to device features such as the camera, GPS, biometric authentication, and Bluetooth. We follow Apple's Human Interface Guidelines and Google's Material Design so your app feels at home on each platform, and we test across a range of devices and OS versions to catch issues before users do.
Offline Support and Push Notifications
Mobile users are not always connected, so we design apps to work offline and sync when the network returns. Local storage, queued actions, and conflict handling keep the experience reliable in poor coverage. We implement push notifications through Apple Push Notification service and Firebase Cloud Messaging, with segmentation so you reach the right users rather than spamming everyone. For apps used in the field, this combination of offline capability and timely alerts often determines whether staff actually adopt the tool.
App Store and Play Store Submission
Getting approved is its own skill, and we manage it for you. We prepare store listings, screenshots, privacy declarations, and the data-safety and app-privacy disclosures both stores now require. We configure signing, provisioning, and release tracks, and we handle the review process including common rejection reasons before they happen. After launch we support phased rollouts, crash monitoring, and the update cadence needed to keep the app compatible with new OS releases and store policy changes.
Deliverables
- Native iOS app in Swift and Android app in Kotlin
- Offline data storage with background synchronisation
- Push notification setup via APNs and Firebase Cloud Messaging
- App Store and Google Play listing and submission
- Backend API and admin panel where required
- Crash reporting, analytics, and post-launch update support
Internal Business Tools & Dashboards
Custom internal tools and dashboards that replace spreadsheets and connect your operational data.
Spreadsheets and disconnected systems quietly cost businesses hours every week and hide errors until they become expensive. We build internal tools and dashboards that pull your data into one place, enforce the right rules, and give each team a clear view of what matters. These tools are not flashy; they are designed to make daily work faster and decisions better informed.
Replace Fragile Spreadsheets With Real Systems
When critical processes live in shared spreadsheets, you get version confusion, broken formulas, and no real access control. We replace these with proper applications backed by a database, where data is validated on entry and every change is recorded. Forms guide users through the right steps, calculations run consistently, and reports reflect live data instead of a copy from last week. The result is fewer mistakes, a single source of truth, and processes that scale beyond what a spreadsheet can safely handle.
Dashboards That Surface the Right Numbers
A good dashboard answers a question at a glance. We work with your teams to define the metrics that drive decisions, then build interactive dashboards with filtering, drill-down, and export. Data is pulled from your databases, APIs, and existing systems, refreshed on the schedule you need, from live to daily. We design for clarity over decoration, so managers see trends and exceptions quickly rather than wading through cluttered charts. Role-based views ensure each person sees the figures relevant to their work and nothing more.
Built for Your Team and Your Workflow
Internal tools succeed when they match how people actually work, so we design around your real processes rather than a generic template. We add role-based permissions, audit trails, and approval steps that reflect your organisation's structure. Tools integrate with the ERP, CRM, accounting, and HR systems you already run, so staff stop re-entering the same data in multiple places. Because these are used daily by employees, we invest in a clean, fast interface and short training so adoption is high from the first week.
Deliverables
- Custom internal application with validated data entry
- Interactive dashboards with filtering and export
- Role-based access control and audit logging
- Integrations with ERP, CRM, and accounting systems
- Data migration from existing spreadsheets and tools
- User training and documentation for staff
Customer Portal Development
Secure self-service portals where customers manage accounts, requests, documents, and payments online.
A customer portal turns repetitive support calls into self-service that customers actually prefer. We build secure portals where your clients view their accounts, submit and track requests, access documents, and make payments without waiting on your team. Done well, a portal reduces support load while giving customers a faster, more transparent experience with your business.
Self-Service That Reduces Support Load
Most support requests are routine: checking a balance, downloading an invoice, updating details, or tracking a request. A portal lets customers handle these themselves, around the clock, which frees your team for higher-value work. We design clear self-service journeys for the tasks your customers ask about most, with status tracking so they always know where things stand. Every routine query a customer resolves alone is one less call or email for your staff, and the savings compound as your customer base grows.
Secure Accounts and Document Access
Portals hold sensitive customer data, so security is central to the design. We implement strong authentication with optional multi-factor login, encrypt data in transit and at rest, and scope every request so customers only ever see their own records. Document libraries let clients access contracts, statements, and reports securely, with permissions controlling who can view or download what. Audit logging records access for compliance, and session controls limit exposure. The portal gives customers convenience without compromising the protections your business and regulators require.
Integrated With Billing, CRM, and Support
A portal is only useful if it reflects accurate, live information, so we connect it to the systems that hold your data. Account details sync with your CRM, invoices and payments link to your billing or accounting platform, and support tickets flow into your help desk. We integrate payment gateways so customers can settle invoices directly, with confirmations updating your records automatically. This integration means customers see real-time, accurate information and your staff are not manually reconciling the portal against other systems.
Deliverables
- Branded customer-facing self-service portal
- Secure authentication with optional multi-factor login
- Account management and secure document library
- Support ticket and request tracking
- Payment gateway and billing system integration
- CRM and back-office system integration
API Design & Development
Well-designed REST and GraphQL APIs with versioning, security, rate limiting, and clear documentation.
An API is a contract between systems, and a poorly designed one becomes expensive technical debt. We design and build REST and GraphQL APIs that are consistent, secure, and documented well enough that other teams can integrate without asking you questions. Whether you are exposing data to partners or connecting your own services, we build APIs that hold up under real traffic.
REST and GraphQL, Designed for Consumers
We choose between REST and GraphQL based on how the API will be used. REST suits straightforward resource access with predictable caching, while GraphQL fits clients that need flexible queries and want to avoid over-fetching. Whichever we use, we design consistent naming, predictable error responses, sensible pagination, and clear status codes so the API behaves the way developers expect. A well-designed API reduces integration time for everyone who consumes it, whether that is your mobile app, a partner, or another internal service.
Versioning, Rate Limiting, and Reliability
APIs evolve, so we plan for change from the start. Versioning lets you ship improvements without breaking existing clients, and we manage deprecation with clear timelines. Rate limiting and throttling protect your services from abuse and traffic spikes, while caching keeps response times low. We add health checks, retries, and graceful degradation so a single slow dependency does not bring everything down. For high-traffic APIs we design for horizontal scaling, ensuring the service stays responsive as the number of consumers grows.
Authentication, Security, and Documentation
We secure APIs with appropriate authentication, typically API keys, OAuth 2.0, or JSON Web Tokens, scoped so each client can only access what it should. Inputs are validated, payloads are size-limited, and we follow practices that guard against common API attacks. Every endpoint is documented, usually with an OpenAPI or GraphQL schema, so consumers get accurate, machine-readable references and interactive docs. Good documentation cuts support requests dramatically and is often the difference between an API that gets adopted and one that frustrates the teams meant to use it.
Integrating Third-Party APIs
Many projects involve consuming external APIs as much as building them, from payment processors to mapping, messaging, and logistics services. We integrate these reliably, handling authentication, rate limits, retries, and the failure modes that external services inevitably have. We wrap third-party calls behind our own interfaces so a vendor's outage or breaking change is contained rather than spreading through your application. Webhooks are handled idempotently so duplicate deliveries do not cause double processing, keeping your data consistent.
Deliverables
- REST or GraphQL API with consistent, documented endpoints
- Authentication via API keys, OAuth 2.0, or JWT
- Versioning strategy and deprecation handling
- Rate limiting, throttling, and caching configuration
- OpenAPI or GraphQL schema with interactive documentation
- Third-party API integrations with resilient error handling
SaaS Product Development
End-to-end SaaS product development with multi-tenancy, subscription billing, and scalable cloud architecture.
Building a SaaS product is different from building a one-off application. You are designing software that serves many customers from one system, bills them automatically, and scales as you grow. We help founders and enterprises build SaaS products from MVP to scale, handling the architectural decisions that are painful to fix later if they are made wrong at the start.
Multi-Tenant Architecture Done Right
Multi-tenancy lets one application serve many customers while keeping each one's data isolated and secure. We choose the right model for your case, whether a shared database with tenant scoping, separate schemas, or isolated databases for customers with strict requirements. Tenant isolation is enforced at the data layer so one customer can never see another's records. We design for per-tenant configuration, custom branding, and onboarding so new customers can sign up and start using the product without manual setup from your team each time.
Subscription Billing and Plans
Recurring revenue depends on billing that just works. We integrate billing platforms such as Stripe to handle subscriptions, plan tiers, trials, proration, upgrades, downgrades, and failed-payment recovery. Usage-based and seat-based pricing are supported where your model needs them. We build the plumbing that connects billing events to feature access, so a customer's plan controls what they can do in the product automatically. Invoices, receipts, and tax handling are configured to your requirements, and dunning flows reduce involuntary churn from expired cards.
Self-Serve Onboarding and Feature Control
Good SaaS lets customers sign up, onboard, and get value with minimal hand-holding. We build smooth signup and onboarding flows, in-app guidance, and the team and role management that business customers expect. Feature flags and plan-based gating let you control which capabilities each tier unlocks and roll out new features safely to subsets of users. Admin tooling gives you visibility into accounts, usage, and support, so your team can manage customers and respond to issues without digging through the database.
Scalable Cloud Infrastructure
SaaS infrastructure has to handle growth without manual firefighting. We deploy on cloud platforms with automated scaling, separate environments, and infrastructure defined as code so it is reproducible. Monitoring, logging, and alerting let you catch problems before customers report them, and automated backups with tested recovery protect tenant data. We build CI/CD pipelines so you can ship frequently and safely. The aim is infrastructure that grows with your customer base while keeping your monthly cost proportional to actual usage rather than guesswork.
Deliverables
- Multi-tenant application with enforced data isolation
- Subscription billing with plans, trials, and proration
- Self-serve signup, onboarding, and team management
- Feature flags and plan-based access control
- Admin dashboard for accounts, usage, and support
- Scalable cloud infrastructure with CI/CD and monitoring
Workflow Automation Applications
Custom applications that automate approvals, handoffs, and repetitive processes across your teams and systems.
Manual processes that pass work between people and systems are slow, error-prone, and hard to track. We build workflow automation applications that move tasks through defined steps automatically, route approvals to the right people, and remove the repetitive work that drains your team's time. The goal is consistent, traceable processes that run themselves and free staff to focus on judgement, not data shuffling.
Automate Approvals and Handoffs
Approval chains often stall in inboxes, with no visibility into where a request is sitting. We model your approval flows in software, routing each request to the right approver based on rules such as amount, department, or type. Reminders chase pending items, escalations trigger when something stalls, and every decision is recorded with a timestamp and reason. Multi-level and parallel approvals are handled cleanly. The result is faster turnaround, a clear audit trail, and an end to the question of who is holding up a request.
Connect the Systems That Hold Your Data
Real automation removes the copying of data between systems. We integrate your workflow app with the ERP, CRM, accounting, email, and document systems your processes touch, so information flows automatically instead of through manual re-entry. A completed step can update a record, generate a document, send a notification, or trigger the next action in another system. By connecting these systems through reliable integrations, we eliminate the gaps where work falls through or gets duplicated, and we keep your data consistent across every platform involved in the process.
Configurable Rules and Clear Visibility
Processes change, so we build automation you can adjust without a developer for every tweak. Business rules, thresholds, and routing can be configured by your team within the limits we set, so policy changes do not become IT projects. Dashboards show where work stands, how long steps take, and where bottlenecks form, giving managers the data to improve the process over time. Notifications keep participants informed without flooding inboxes, and full logging means you can always reconstruct exactly what happened and when.
Deliverables
- Custom workflow application modelling your processes
- Rule-based routing for approvals and task assignment
- Automated reminders, escalations, and notifications
- Integrations with ERP, CRM, accounting, and document systems
- Configurable rules and thresholds for your team to manage
- Process dashboards with audit logging and reporting
FAQ
Common questions
Can you replace our spreadsheet-based workflow?
Yes. We can convert spreadsheet-heavy processes into structured applications with validation, permissions, reporting, and audit history.
Do you build phased releases?
Yes. We typically start with a focused first release, then expand the application based on business priority and user feedback.
Which technologies do you use for web applications?
We typically build front ends with React and Next.js and back ends with Node.js or .NET, using TypeScript throughout. The exact stack depends on your team's skills, existing systems, and hosting environment, which we confirm during the planning phase.
Should we build native or cross-platform?
It depends on your needs. Native suits apps that rely on heavy graphics, deep hardware access, or platform-specific features. Cross-platform with Flutter or React Native can be more cost-effective for standard business apps. We advise on the trade-offs during planning rather than pushing one approach.
Can you connect to the systems we already use?
Yes. We integrate with common ERP, CRM, accounting, and HR platforms through their APIs or databases, so your tools share data rather than creating another silo. Where a system has no API, we use secure imports or scheduled syncs to keep information consistent.
Can customers pay through the portal?
Yes. We integrate payment gateways so customers can pay invoices or fees directly in the portal. Confirmations update your billing or accounting system automatically, removing manual reconciliation and giving customers an immediate record of their payment.
Should we use REST or GraphQL?
REST works well for straightforward resource access and predictable caching, while GraphQL suits clients needing flexible queries without over-fetching. We recommend based on how the API will be consumed and your team's familiarity, and we can combine both where it makes sense.
Which multi-tenancy model is best for our product?
It depends on your security needs, customer size, and budget. Shared databases with tenant scoping are efficient for many products, while separate schemas or databases suit customers with strict isolation requirements. We assess your case and recommend a model that balances cost, isolation, and operational complexity.
What kinds of processes can you automate?
Common candidates include purchase and expense approvals, leave and HR requests, document review and sign-off, onboarding, and any multi-step process that passes work between people or systems. If a process follows rules and involves handoffs, it is usually a strong fit for automation.
Ready to start?
Tell us about your custom enterprise applications needs and we will reply with a practical implementation plan.