Custom software
development services
Full-lifecycle custom software development services: we build custom web systems, SaaS dashboards, and cross-platform mobile apps — from Next.js portals to React Native interfaces — engineered for high user volume, real-time data, and production resilience.
Custom software development services we deliver
Browse our most requested services — or book a call and tell us exactly what you need.
Full stack web application development & software systems
We don't build marketing templates or Webflow sites. We engineer full stack software — production applications with complex logic, real-time data, and high-volume scalability.
Next.js web applications
Full-stack web applications built with Next.js and React — from customer-facing portals to high-performance SaaS tools. Engineered with server-side rendering, robust APIs, and enterprise scalability.
- Server-side rendered web apps
- REST and GraphQL APIs
- Authentication systems
- Multi-tenant architecture
React Native mobile apps
Cross-platform mobile applications that run natively on iOS and Android from a single codebase. Includes deep hardware integrations and full App Store and Google Play publishing support.
- iOS & Android from one codebase
- Expo & bare React Native
- App Store & Play submission
- Native device integrations
SaaS platform development
Multi-tenant SaaS architectures designed to scale from MVP to millions of requests. Complete with subscription billing, role-based access control, analytics dashboards, and production security.
- Multi-tenant architecture
- Stripe subscription billing
- Role-based access control
- Admin dashboards
AI-powered applications
Web and mobile applications with AI embedded natively at the core. Includes OpenAI and Claude API integrations, RAG search pipelines, document parsing, and intelligent user workflows.
- OpenAI & Claude integrations
- RAG-powered search & Q&A
- Document processing pipelines
- Vector database setup
Custom AI model development
Fine-tuned LLMs, computer vision models, and custom neural networks trained on your internal data. Delivered with full model weight ownership and complete deployment documentation.
- Computer vision models
- Fine-tuned LLMs
- Anomaly detection models
- Training pipeline docs
Trading dashboards & portals
Custom web-based portals and analytics dashboards for funds, signal providers, and prop firms. Engineered with live market feeds, P&L analytics, and low-latency websocket execution.
- Live data feed integrations
- P&L & performance analytics
- Drawdown alerts
- Subscriber portals
Internal tools & business apps
Bespoke internal software and operations portals built around your business workflows to replace spreadsheets and disconnected SaaS subscriptions with a single unified system.
- Workflow-specific logic
- Role-based access control
- Custom integrations
- Reporting & analytics
Technologies we build with
Hover or click on any technology to view our development capabilities, included services and official tools.
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Web & app projects we've delivered
Real projects. Real outcomes. Built for live users and live business operations.
Autonomous AI voice agent & conversational sales platform
Businesses miss high-value inbound sales leads and customer support calls outside standard office hours, while human phone reps face high turnover, inconsistent qualification, and manual CRM entry bottlenecks.
Companies handling high call volumes — across prop trading firms, fintech brokerages, medical clinics, legal practices, and high-ticket service businesses — struggled with missed inbound inquiries, high support costs, and slow response times. Basic chatbots offered rigid, robotic text responses, while human staff could not provide 24/7 coverage, leading to lost revenue and delayed follow-ups.
Engineered PSI AGENT — an enterprise-grade autonomous conversational AI platform deploying human-sounding neural voice agents over phone lines and WebRTC with sub-300ms ultra-low latency. Powered by deterministic vector knowledge bases for zero-hallucination answers, real-time live appointment booking via Calendly/Google Calendar, automated multi-turn qualification, and native two-way synchronization with HubSpot, Salesforce, and internal CRMs.
Delivered 24/7 autonomous phone call coverage with sub-300ms response latency, 100% automated CRM record logging, and zero missed calls — slashing operational support costs while booking qualified sales appointments round the clock.
AI ad creation tool with website scanning and brand extraction
Creating on-brand ad creatives for multiple platforms and sizes requires design skills, brand knowledge, and significant manual effort — putting consistent ad production out of reach for most small and mid-size businesses.
A platform needed to give its clients the ability to create professional ad creatives for Google, Facebook, and Instagram — in multiple sizes — without needing a designer or manual brand setup. Clients had no way to automatically extract their own brand colors, logo, and imagery from their website, and no tool that combined that extraction with AI-generated copy and layout generation in a single workflow.
An AI system that accepts any website URL as input and automatically scans the entire site to understand its content, brand identity, and visual assets. The system extracts the brand logo, identifies the color theme, retrieves all site images for user selection, and generates a website description. From that description, the platform generates punchlines, header text, and CTA button text using AI — then assembles ad creatives in the correct dimensions for each selected platform, color-matched to the extracted brand palette. Users can generate complete, on-brand ads across Google, Facebook, and Instagram without any design input.
Clients can produce on-brand ad creatives across multiple platforms and sizes from a single URL input — with no designer involvement and no manual brand setup. Logo extraction, color matching, image selection, AI copy generation, and layout assembly are fully automated, reducing ad creation from hours of design work to a guided self-serve workflow.
AI diamond analysis & buying platform
GIA certificates alone can't reveal every flaw — buyers had no way to see light leakage, hidden inclusions, or symmetry issues before committing thousands of dollars to a diamond.
Two veteran diamond suppliers wanted to help engagement ring buyers avoid overpaying — but a GIA certificate alone hides real flaws: light leakage from poor cut proportions, high-risk inclusions certificates minimize, and off-center tables that reduce brilliance even in "Excellent" graded stones. Buyers had no easy way to catch this before spending thousands.
A proprietary AI diamond analysis tool using computer vision to scan actual diamond images and certificate photos — detecting light leakage, dead zones, high-risk inclusions and symmetry issues that grading reports alone don't surface. Paired with an AI-powered diamond search across millions of certified natural and lab-grown stones, plus a platform for unbiased retailer reviews and free expert consultations.
Buyers can now upload a diamond report or image and get an instant visual breakdown of hidden flaws before they spend a dollar, alongside search and comparison tools spanning millions of stones. The platform has helped thousands of couples buy with confidence, backed by a 4.9/5 Google rating.
Why clients choose PSI Square as their custom software development company
Full-stack capability under one roof
Frontend, backend, database, infrastructure, AI integrations, custom model training and mobile — we cover the full stack. No overhead from coordinating multiple specialists. One team, one point of contact, one standard of delivery across every layer of your product.
Built to be maintained, not just launched
We write clean, documented, component-driven code that your team or any future developer can understand and extend. No black boxes, no undocumented workarounds, no clever code that only the original developer can read.
Production from day one
Every application is built for live users and live load — not optimised after launch. Performance, security, error handling and scalability are built into the architecture from the start, not retrofitted when problems appear.
You own everything, always
Full source code ownership on every project — including trained model weights, training pipelines and workflow configurations where applicable. No vendor lock-in, no licensing fees, no proprietary dependencies on our own tools or infrastructure.
How we work
A structured process that keeps your project on track from brief to live deployment.
Free consultation
We start with a 30-minute call to understand what you're building, who it's for and what technical requirements are already defined. We'll ask about your existing stack, your user base and any integrations you need — and give you an honest view of what's achievable and in what timeframe.
Scope & specification
We produce a written scope document covering architecture decisions, tech stack, feature list, integrations and delivery phases. For projects involving custom model training, this includes a data requirements assessment. You sign off on the spec before development begins.
Development in sprints
Development begins within 5 business days of approval. We work in focused sprints with regular deliverables — so you see working software throughout the build, not just at the end. Staging environment access provided from the first sprint.
QA & testing
All applications go through functional testing, cross-browser and cross-device testing, and performance review before delivery. Custom AI models are evaluated against held-out test sets. For mobile apps, we test on real devices across iOS and Android before App Store submission.
Deployment & handoff
Full deployment to your chosen infrastructure, with documentation, a codebase walkthrough and a handoff session. Post-launch support available. Most clients return for their next phase within 90 days.
Is this the right fit for you?
We work best with clients who have a clear product vision and value software that's built to last.
This is a strong fit if you
Have a defined product, tool or application you want built — not just a vague idea
Need a full-stack team that can own the entire build, including AI and model layers
Want production-quality code with documentation you can hand to any developer
Are building a SaaS product, internal tool or customer-facing application with real users
Want a development partner, not just a contractor who disappears after delivery
Probably not the right fit if you
Need a simple marketing website or landing page — we're not the most cost-effective option for that
Don't have a defined feature set and want us to design your product strategy from scratch
Are primarily comparing on hourly rate rather than total outcome and code quality
Need something built and live in under a week with no specification
Not sure what you need? Book a free call — we'll tell you honestly whether we're the right fit and, if not, what kind of team you should be looking for.
BOOK A FREE CONSULTATIONWhat clients say about working with us
Real feedback from verified clients, direct-NDA projects and live deployments.
"The Next.js dashboard they built replaced our entire spreadsheet reporting setup. It's fast, the data is live and the AI-generated summaries save our team hours every week. Exactly what we asked for, on time and documented properly."
Muhammad Okasha Razzaq
Founder & Principal Systems Architect
Production-Grade Engineering with Direct Architectural Review
Every web application, React Native mobile app, and SaaS platform built by PSI Square is architected for production reliability from day one. Under the technical oversight of Muhammad Okasha Razzaq, our engineering team ensures database query optimization, clean state management, automated CI/CD pipelines, and defensive security measures that prevent post-launch bottlenecks.
We protect client intellectual property under bilateral mutual non-disclosure agreements (NDAs) and deliver 100% full source code, environment configurations, and deployment scripts upon delivery. Review our technical stack on our dedicated tech stack page or explore sibling systems capabilities including algorithmic trading development and AI agents & workflow automation.
Explore Our Complete Engineering Ecosystem
Algorithmic Trading Development →
Institutional-grade algorithmic trading software, custom Expert Advisors (MT4/MT5), TradingView Pine Script bots, and low-latency FIX API bridges.
AI Agents & Automation →
Autonomous AI voice agents, AI SDRs, smart document extractors, and end-to-end n8n workflow automations integrated directly with your CRM.
Verified Client Case Studies →
Browse detailed case studies of deployed web applications, React Native mobile apps, and enterprise SaaS solutions engineered for high user volume.
Frequently asked questions
Find immediate answers about our tech stack, timelines, code ownership, AI model training, and how we price projects.
How projects are priced
Custom software development engagements range from focused MVPs (starting from $3,500, delivered in 6–10 weeks) to full-scale multi-tenant SaaS platforms and enterprise portals ($15,000–$40,000+, delivered in 3–5 months). Every project is scoped individually with fixed-price milestones or dedicated monthly engineering sprints.
All deliveries include full source code ownership, production deployment scripts, automated testing, and 30 days of post-launch warranty and bug fixes. We also offer dedicated monthly SLA maintenance and DevOps support.
Book a free 30-minute consultation with a senior software architect. We will review your technical requirements and deliver a detailed scope, timeline, and quote within 24 hours.
Ready to build your product?
Whether you need a Next.js web application, a React Native mobile app, a full SaaS platform or a product powered by a custom-trained AI model — tell us what you're building. We'll scope it, architect it and deliver it to production standard. Most projects start within 5 business days.
Or email info@psi-square.net · We reply within 24 hours · NDA available on request