We Build What You Need
From AI systems to full infrastructure — the Passisto engineering team delivers custom technology solutions that scale with your business.
What We Build
End-to-end engineering
Six practice areas, one team. We cover the full technology stack so you work with one partner instead of managing many vendors.
AI Systems
Custom intelligence for your business
- Custom LLM fine-tuning & deployment
- RAG pipelines & vector databases
- AI chatbots & virtual assistants
- Document intelligence & extraction
- ML models & recommendation engines
Cloud Development
Scalable cloud-native architecture
- Cloud-native app development (AWS/Azure/GCP)
- Serverless & microservices architecture
- Cloud migration & modernization
- Multi-cloud strategy & optimization
- Cost engineering & FinOps
DevOps & Infrastructure
Ship faster, fail less
- CI/CD pipeline design & automation
- Kubernetes & container orchestration
- Infrastructure as Code (Terraform)
- Observability, monitoring & alerting
- Security hardening & compliance
Business Automation
Eliminate repetitive work
- Workflow automation & RPA
- Business process optimization
- API integrations & webhooks
- Automated reporting & dashboards
- Scheduled jobs & event-driven systems
Custom Software
Built exactly to spec
- Full-stack web application development
- SaaS product development from scratch
- REST & GraphQL API design
- Mobile apps (iOS, Android, React Native)
- Legacy system modernization
Data Engineering
Turn data into decisions
- Data pipeline & ETL architecture
- Real-time streaming (Kafka, Flink)
- Analytics dashboards & BI tools
- Data warehouse design & optimization
- Data governance & quality frameworks
Custom AI Systems
We design and build end-to-end AI solutions tailored to your domain — from fine-tuning models on your proprietary data to deploying production RAG pipelines that your teams actually use.
- Domain-specific models: Fine-tune LLMs on your internal documents, tone, and terminology.
- Knowledge retrieval: RAG pipelines that answer questions from your private knowledge base with source citations.
- Agents & automation: Autonomous AI agents that execute multi-step tasks across your existing tools.
- Production deployment: Scalable, monitored inference endpoints with latency and cost optimization.
// Your data stays on your infrastructure
const pipeline = await createRagPipeline({
model: 'your-fine-tuned-llm',
sources: ['sharepoint', 'confluence', 's3'],
privacy: true,
})
// Result
answer: "Based on your Q3 policy document..."
sources: ['policy-2024.pdf', 'hr-handbook.md']
confidence: 0.94
How We Work
From idea to production
A repeatable, transparent process refined across dozens of enterprise projects.
Discovery Call
We start by understanding your business goals, technical constraints, and timeline. No templates — just honest conversation.
Architecture & Plan
Our engineers design a tailored solution: technology stack, milestones, team composition, and a clear delivery roadmap.
Build & Iterate
We build in sprints with full visibility. Weekly demos, async updates, and a shared project board — you're always in the loop.
Launch & Support
We handle deployment, monitoring, and the first months of support so your system runs smoothly from day one.
Why Passisto Dev
Built by practitioners
Fast time-to-value
We move quickly. Most projects have a working prototype in under 4 weeks.
Senior engineering talent
The same engineers who built Passisto work on your project. No outsourcing.
Enterprise-grade quality
Security, scalability, and maintainability are non-negotiable in everything we deliver.
Ready to build something great?
Tell us about your project. We'll get back to you within 24 hours with a clear next step.