Boutique Software & Cloud Engineering
We design and build enterprise APIs, serverless systems, data pipelines, and graph-driven platforms on AWS. Small, senior team — fast delivery, production quality.
Enterprise APIs
Rust/Java, Graph (Gremlin), OAuth2, RBACServerless
AWS Lambda, EventBridge, SQS, API GWData & Pipelines
ETL, Redshift, pgvector, RDSReliability
IaC (Terraform), multi-AZ, observabilitySecurity
Least privilege IAM, encryption, auditsAI Integration
MCP, RAG, cost-optimized LLM opsTech Stack
Services
Architecture & Delivery
- System & data architecture on AWS
- Serverless & event-driven design
- Security reviews, performance testing
Build & Integrate
- Enterprise APIs (OAuth2/JWT/RBAC)
- Graph DB (Amazon Neptune, Gremlin)
- Data ingestion & pipelines (ETL, Redshift)
AI & Automation
- Model Context Protocol (MCP) servers
- RAG & vector search (pgvector)
- Cost-efficient LLM integrations
Ops & Scale
- Terraform IaC, multi-env VPCs
- Observability (metrics/logs/traces)
- Zero-downtime CI/CD pipelines
Selected Work
Master Data Service (MDS)
- Order History API, sub-300ms p95
- Type-safe Gremlin query builder (anti-injection)
- Retail & e-commerce ingestion, 50+ ev/s
Realiko (Proptech SaaS)
- AI-first marketplace, semantic search
- Auto-deployment, multi-AZ, <$1k/mo ops
- MVP → production in 6 months
More references and technical details available on request.
Client Testimonials
"Outstanding technical expertise and delivery speed. ARSIAR built our enterprise API infrastructure on time and exceeded our performance requirements."
"The team's deep knowledge of AWS serverless architecture saved us thousands in infrastructure costs while improving reliability."
Additional references available upon request.
Get in Touch
Reach out directly — we respond to all inquiries within 1 business day.
Company Information
ARSIAR — Boutique Software & Cloud Engineering
Rijeka, Croatia • VAT ID: HR82396347517
Registered in Croatia • Serving clients across Europe & US