Siznex is a bespoke software development company building enterprise applications, SaaS platforms, agentic AI systems, and cloud-deployed solutions. From Node.js server-side backends to large language model integrations, we ship production software that scales.
What sets us apart: We have a dedicated Node.js and cloud deployment team, an in-house agentic AI practice, and a software testing team embedded in every sprint. One company covering every layer of your technology stack.
Every engagement covers the full software delivery lifecycle, from architecture and server-side development to cloud deployment, intelligent automation, and ongoing software quality assurance.
Siznex rebuilt our entire insurance broker platform from a legacy monolith to a cloud-native microservices system on AWS. The Node.js migration cut our API response times by 60% and the QA team caught critical regression issues before every release. First software vendor in 5 years that actually delivered on time.
We needed an agentic AI system that could process unstructured contract documents and extract structured data into our ERP. Siznex built the RAG pipeline, the LLM integration, and deployed it to Azure, all within 10 weeks. What used to take our team 3 days per contract now runs in 4 minutes.
Siznex built our multi-tenant SaaS platform from scratch, including Stripe billing, role management, and a full analytics dashboard. They also handled the entire AWS deployment and set up our CI/CD pipeline. 18 months later the platform handles 2,400 active tenants with zero downtime.
Our in-house AI agent practice builds autonomous systems that go beyond chatbots. Agents that reason, use tools, call APIs, read documents, and complete multi-step workflows inside your existing software infrastructure, deployed and managed by our cloud team.
Most software agencies treat cloud deployment as a final step handled by a generalist. Siznex has a dedicated Node.js and cloud infrastructure team involved from architecture planning through production launch, ensuring bespoke software is built to deploy cleanly and scale reliably.
Our Node.js team builds high-performance REST and GraphQL APIs, event-driven microservices, real-time systems with WebSockets, and serverless functions. Proven across SaaS platforms, enterprise applications, and AI agent backends.
Dedicated cloud infrastructure team managing AWS, Azure, and GCP. CI/CD pipeline configuration, Docker containerisation, Kubernetes orchestration, legacy system migration to modern cloud architecture, and ongoing cloud management after launch.
Software quality assurance runs alongside development from day one. Unit tests, integration tests, automated regression suites, load testing, security scans, and user acceptance testing before every release, not only at project close.
Bespoke enterprise applications for complex workflows, high-volume data, and long-term use
Our bespoke software development services cover enterprise application development from initial architecture through cloud deployment. We build scalable, maintainable systems on Java, .NET, Python, and Node.js server-side backends with React and Angular frontends. Every enterprise application is designed around your specific workflows and integration requirements. Architecture decisions account for current load, projected growth, third-party system integrations, and security and compliance standards from day one. Semantic search, ERP integration, real-time data pipelines, and multi-region deployments are standard capabilities in our enterprise software practice.
Autonomous AI agents, multi-agent systems, RAG pipelines, and large language model integrations
Our AI agent development practice builds production-grade agentic systems that reason, plan, and act inside your software. We build multi-agent orchestration systems where AI agents collaborate on complex tasks, RAG pipelines that ground large language model outputs in your proprietary data, and AI-powered workflows that replace brittle rule-based automation with intelligent decision-making. Every agentic AI solution is deployed to production via our dedicated cloud team with monitoring, rate limiting, and cost management included. Use cases include document intelligence, automated research pipelines, code generation agents, customer service automation, and business process orchestration.
Workflow automation, RPA, event-driven architectures, and AI-powered process automation
Our advanced automation services go well beyond off-the-shelf workflow tools. We design and build custom automation systems covering robotic process automation for repetitive back-office tasks, event-driven architectures that react to real-time data streams, and AI-powered automation that handles unstructured inputs and edge cases traditional rule-based systems cannot. Every automation solution integrates with your existing software stack and is deployed via our cloud management team with full observability and alerting. Intelligent automation via large language models is available as an upgrade to any workflow where decision complexity exceeds simple conditionals.
Multi-tenant SaaS platforms, subscription billing, and cloud-native product delivery
Siznex is a SaaS development services company that builds multi-tenant platforms from architecture through production. Our SaaS product development covers tenant isolation strategies, subscription and billing integration, role-based access control, usage analytics dashboards, API-first design, and cloud-native deployment on AWS or Azure. We work with both new SaaS ventures building from scratch and established software companies adding SaaS capabilities to existing products. SaaS performance benchmarking and scalability testing are part of every engagement.
Dedicated Node.js and cloud team covering AWS, Azure, GCP, CI/CD, and containerisation
Siznex has a dedicated Node.js and cloud infrastructure team embedded in every custom software project from architecture phase through post-launch. Cloud deployment covers AWS (EC2, ECS, Lambda, RDS, S3, CloudFront), Azure (App Service, AKS, Azure Functions, Cosmos DB), and GCP. We configure CI/CD pipelines using GitHub Actions or GitLab CI, containerise with Docker, orchestrate with Kubernetes, and take on ongoing cloud management after go-live. Cloud migration from legacy on-premise systems is a standard offering, including lift-and-shift and full re-architecture paths depending on complexity and budget.
Automated software testing, load testing, security scanning embedded throughout every sprint
Software quality assurance at Siznex is not a handover gate, it is embedded in every development sprint from day one. Our dedicated testing team writes automated test suites in parallel with feature development, which catches defects early and reduces costly late-stage rework. QA on custom software projects covers unit testing, integration testing, end-to-end test automation, load and performance testing, security vulnerability scanning, and user acceptance testing. We define the test strategy during the architecture phase and maintain test coverage throughout the build. Every cloud deployment goes through QA sign-off before release.
Connect custom software to ERP, CRM, payment gateways, and data platforms via REST and GraphQL
Bespoke software rarely runs in isolation. Our integration team connects new custom software to existing ERP systems (SAP, Oracle, custom builds), CRM platforms, payment processors, data warehouses, and third-party SaaS tools via REST and GraphQL APIs. We build the integration layer with proper error handling, retry logic, data transformation pipelines, and monitoring so integrations remain reliable as both systems evolve. API documentation, versioning strategy, and developer portal setup are included where relevant.
Our technology stack covers every layer of bespoke software delivery. Technology choices are driven by project requirements, scalability needs, and long-term maintainability, not familiarity.
Every bespoke software project starts with a no-obligation consultation where we review your requirements, assess technical complexity, and provide a written estimate before any commitment is made.
We review your requirements, assess complexity, recommend the right technology stack including whether agentic AI or intelligent automation applies, and provide a written estimate with delivery timeline.
System architecture, database schema, API contracts, cloud deployment plan, and UI/UX are all finalised before production code begins. Software testing strategy is also defined at this stage.
Iterative sprints with automated software testing running in parallel. Backend services, cloud infrastructure, and any AI agent or automation components are built and tested together, not sequentially.
Our dedicated cloud team handles production environment provisioning, CI/CD pipeline setup, load testing, security scanning, and the final deployment sequence before go-live sign-off.
Ongoing cloud infrastructure management, software updates, performance monitoring, and maintenance contracts available. We remain responsible for the system after handover.
Siznex offers end-to-end bespoke software development services including enterprise application development, SaaS product development, agentic AI solutions, large language model integration, intelligent automation, Node.js server-side backends, cloud deployment and infrastructure management, third-party API integration, and software quality assurance.
Yes. Siznex builds agentic AI systems using large language models, multi-agent orchestration frameworks, and intelligent workflow automation. Our AI agent development covers autonomous task execution, LLM-powered decision pipelines, RAG systems, and integration with existing business software, all deployed to production by our dedicated cloud team.
Siznex has a dedicated Node.js and cloud infrastructure team managing deployments on AWS, Azure, and GCP. Services include cloud-native architecture design, containerisation with Docker and Kubernetes, CI/CD pipeline setup, legacy system cloud migration, and ongoing cloud management post-launch.
Software testing at Siznex runs throughout the development cycle, not only at handover. This covers automated test suites, unit and integration testing, load and performance testing, security vulnerability scanning, regression testing, and UAT support. The QA strategy is defined during architecture phase and maintained throughout the build.
Yes. Siznex is a SaaS development services company building multi-tenant SaaS platforms, subscription billing systems, user access management, API-first architectures, and cloud-native software products. We cover the full product lifecycle from architecture through cloud deployment and ongoing support.
Our technology stack includes Node.js, Python, Java, and .NET for server-side backends, React and Angular for frontends, AWS, Azure, and GCP for cloud infrastructure, Docker and Kubernetes for DevOps, PostgreSQL, MongoDB, and MySQL for databases, and leading LLM frameworks for AI agent development.
Bespoke software projects at Siznex start at $20,000. Final investment depends on scope, integrations, AI or automation components, cloud infrastructure requirements, and software testing coverage. We provide a detailed written estimate during the free consultation before any engagement begins.
Most bespoke software projects take 4 to 8 months depending on scope. Smaller SaaS platforms or automation systems can be delivered in 8 to 12 weeks. Projects involving agentic AI, large language model integration, or complex cloud infrastructure typically require 6 to 9 months. All timelines are defined and committed to in the scoping phase.
Tell us about your project. We will review your requirements, advise on the right approach including agentic AI and intelligent automation, and send a detailed written estimate within 48 hours.
No commitment required. Written estimate within 48 hours.
