Scalable system architecture & AI autonomy for modern business.
We design and engineer high-load systems, microservices, and autonomous AI/LLM workflows. We combine uncompromising engineering rigor with direct Fractional CTO accountability.
Of hands-on experience in distributed systems and high-throughput backend architecture.
Concurrent users & millions of daily API requests during critical transactional peaks.
Spec-Driven Development, Domain-Driven Design, and rigorous end-to-end type safety.
Average p95 latency across optimized mission-critical API execution paths.
[00:00.012] RAG_INGEST: RAG_INGEST: Fetched 3 policy chunks from pgvector (cosine_sim: 0.941)
[00:00.089] LLM_REASON: LLM_REASON: Evaluated return window constraint: eligible (14 days left)
[00:00.145] TOOL_EXEC: TOOL_EXEC: Calling ERP API endpoint /orders/TK-9042/grant_rma
Architectural precision and deterministic AI.
We don't build vanity prototypes. We deliver fault-tolerant production systems that scale transactions, reduce operational expenses, and eradicate core business bottlenecks.
B2B AI Automation & Agentic Workflows
We build autonomous multi-agent systems, enterprise RAG pipelines with verifiable source grounding, and automated back-office/e-commerce workflows (n8n, Python, LLM APIs). Zero hallucinations in mission-critical operational data.
High-Load E-Commerce Architecture
Scaling mission-critical transaction engines, enterprise ERP integrations (SAP, Comarch, Subiekt), and courier logistics with asynchronous queuing (RabbitMQ, Redis, Kafka). Surge-proof for Black Friday volumes.
Fractional CTO & Tech Advisory
Independent architectural audits, technical debt liquidation, vendor due diligence, and senior engineering mentoring. Seasoned executive technical leadership without full-time C-level overhead.
Legacy Modernization & Monolith Refactoring
Evolutionary transition from monoliths to domain microservices or Vertical Slice Architecture using the Strangler Fig pattern. Zero business interruptions, zero risky "big bang rewrites".
Engineering proof instead of promises.
Real architectural challenges, measured production telemetry, and tangible before-and-after results delivered on production.
Scaling a Transactional Engine to 65k CCU During Black Friday
The system threw HTTP 504 Gateway Timeouts at 12k concurrent users. Severe PostgreSQL lock contention and synchronous processing bottlenecked flash-sale events.
Deployed an Event-Driven architecture on RabbitMQ with asynchronous order confirmation, distributed Redis Cluster cache with key sharding, and high-performance PHP runtime via RoadRunner.
Run an architectural diagnosis for your system.
Select your current technical bottleneck and operational scale to get an immediate architectural recommendation and estimated time-to-impact.
Critical Path Transaction Optimization (High-Load)
Uncompromising technology selection.
We don't chase hype. We curate battle-tested tools with proven production maturity that deliver maximum throughput, fault tolerance, and predictable horizontal scalability.
Backend & Core Engineering
Tools selected for throughput, ecosystem maturity, and type-safe stability.
Optimal TCO, mature transaction engines, high throughput with OPcache/RoadRunner.
LangChain, LlamaIndex, n8n integrations, advanced vector math and embeddings.
Dedicated microservices with high concurrency and microsecond latency.
End-to-end type safety, reactive BFF layers, and webhook integrations.
Databases & Event-Driven Streaming
Database architectures and message brokers guaranteeing ACID consistency and horizontal scale.
Advanced partitioning, B-Tree/GIN indexing, pgvector for semantic search.
Rate limiting, sub-millisecond cache, task queues, and Redlock synchronization.
Async order processing, At-Least-Once delivery, scalable event sourcing.
Product search for hundreds of thousands of SKUs, fuzzy matching, faceted filters.
Cloud Infrastructure, Containers & Telemetry
Predictable, auditable infrastructure designed with Infrastructure-as-Code.
Horizontal Pod Autoscaling (HPA), zero-downtime rolling deploys, reproducible environments.
Canary releases, microsecond routing, dynamic SSL, circuit breakers.
Right-sizing instances, multi-region failover, 40%+ cloud bill optimization.
Distributed tracing, real-time alerting, p99 latency heatmaps, synthetic monitoring.
Architecture Patterns & Quality Standards
Engineering methodologies that protect against tech debt and organizational silos.
Separating business logic from infrastructure, clear domain ownership, modularity.
Strict OpenAPI / AsyncAPI contracts, schema generation, automated validation.
Decomposing legacy systems slice by slice with 100% operational uptime.
Pydantic/Instructor schema validation, deterministic fallback, zero hallucinations.
Transparent rules, zero hidden risks.
We tailor our engagement model to your business maturity: from rapid audit interventions and strategic Fractional CTO leadership to complete turnkey engineering delivery.
Sprint / Architecture Audit
BEST FIT FOR:Companies struggling with performance bottlenecks or preparing for rapid scale.
In-depth, uncompromising review of system architecture, databases, security, and technical debt. Concrete diagnosis backed by an actionable roadmap.
Fractional CTO / Architecture Retainer
BEST FIT FOR:Scale-ups and high-growth e-commerce requiring seasoned engineering leadership.
Ongoing technical leadership, active guidance on critical architectural decisions, senior developer mentoring, and external vendor oversight.
End-to-End Implementation
BEST FIT FOR:Organizations launching advanced AI modules or refactoring mission-critical subsystems.
Comprehensive architecture, implementation, and production deployment of bespoke AI agents/RAG or microservice transactional modules.
Senior Engineering Leadership with Direct Accountability.
No agency middlemen, junior developers, or inflated account teams. You collaborate directly with a Principal Architect who designs, audits, and owns mission-critical systems.
Przemysław Sobolewski
Principal System Architect & Fractional CTO
Specialist in high-load distributed architectures, legacy monolith decomposition (Strangler Fig), and production-grade B2B AI automation. Over a decade of hands-on experience rescuing failing transaction engines, scaling systems for 65k+ CCU peaks, and acting as Fractional CTO for tech-driven enterprises.
Deeply committed to Domain-Driven Design (DDD), Spec-Driven Development, and deterministic AI guardrails. Based in Wrocław, Poland, serving visionary founders, CTOs, and boards across the EU and US.
Answers to critical engineering questions.
Transparent collaboration, zero corporate fluff. Learn how we address the most common architectural concerns of executive boards and engineering leaders.
Consult system architecture without intermediaries.
You speak directly with a Principal Architect and high-load practitioner, not a junior sales representative. We respond within a maximum of 24 business hours.
Book a 30-min Discovery Call
Instant slot reservation via Calendly without back-and-forth emails.