System Design & Architecture Consulting
A system-design document for your next major build — service boundaries, data ownership, integration patterns — argued out before a single line of code is written.
Pick your starting point
Outcome of this engagement
A system-design document for your next major build — service boundaries, data ownership, integration patterns — argued out before a single line of code is written.
What you receive
- System-design document (~20-30 pages) — services, boundaries, data flows, integration patterns, deployment topology
- Architecture decision records (ADRs) — written rationale for each major call, so your team has the WHY in writing 6 months from now
- C4-style diagrams (context, container, component) — exportable as SVG / PDF for stakeholder presentations
- Trade-off table — for each major decision, the alternatives we considered and why we picked this one
- 90-min walkthrough call — we present the design to your engineering team and absorb their pushback before it's frozen
Is this service the right fit for you?
Book this if you…
- You're about to start a new major build (a new service, a new module, a v2 rewrite) and want to do the design once, properly, before code
- You're a CTO at Series A who's been promoted into architecture decisions but wants a senior outside collaborator to argue them with
- You're facing a microservices vs monolith decision and want a senior engineer who's seen both go wrong to help you choose
Don't book this if you…
- You're past the design stage — code is already shipping. Take Architecture Review (#architecture-review) instead — that's a different engagement for a different moment
- You want a "best practice" cookie-cutter answer — system design is a contextual decision. We argue with you, we don't hand you a template
- You're solo and pre-product-market-fit — you'll throw away whatever we design within 6 months. Ship something, learn, then come back
Why This Service
Most delivery problems are architectural: unclear ownership, weak boundaries, missing observability, and premature distribution. We help you design a practical architecture that teams can actually ship and operate.
Key Benefits
Clear Boundaries & Ownership
Define domains, responsibilities, and interfaces to reduce coordination cost and delivery friction.
Scalability & Reliability by Design
Design for load, failure modes, consistency, and resilience — before the system becomes too expensive to change.
Architecture Decisions with Trade-offs
Choose patterns and technologies based on constraints, not trends — with documented reasoning.
Production-Ready Delivery
Make observability, security, and operational readiness part of the design, not an afterthought.
What This Service Includes
- Architecture workshops and discovery sessions
- System design review and risk assessment
- Service boundaries, APIs, and integration design
- Data architecture: storage, consistency, and migration strategy
- Observability and operational readiness checklist
How We Work Together
A straightforward engagement — from first call to measurable results.
Discovery Call
We discuss your goals, stack, and challenges. No commitment required — just a clear conversation.
Tailored Plan
We propose a focused engagement scope aligned with your team size, timeline, and actual needs.
Deliver & Follow Up
We execute the engagement and provide written findings, next steps, and optional follow-up support.
Who you'll be working with
Oleksii Anzhiiak
Software Architect, Senior .NET Engineer & Co-Founder
Currently leads architecture for ToyCRM.com — a multi-tenant CRM platform built on .NET by our team. The same patterns and design decisions used there appear directly in the courses: identity & auth, distributed services, code review culture. You learn from engineers actively shipping production code, not from a textbook.
Frequently Asked Questions
Yes. We evaluate constraints, team structure, delivery goals, and operational maturity to recommend a pragmatic approach.
Yes. We can produce lightweight architecture docs (C4, ADRs, diagrams) and keep them aligned with delivery.
Want to build this skill in-house instead?
Companies with engineering bandwidth sometimes prefer to upskill the team rather than buy the engagement. If that's you, here are the courses that cover the same ground — taught by our senior engineers in the same voice as our consulting work:
Read alongside this engagement
Durable Execution for Agents: The Fifth Discipline Your .NET Background Already Prepared You For
Spec is the truth. Context is the assembly. Evals are the proof. OpenSpec is the operating system. The substrate underneath — the thing that keeps a multi-step agent alive across retries, restarts, and the human-in-the-loop who walks away from their desk at 5pm — is durable execution. Every .NET engineer who's ever shipped a MassTransit saga already understands the pattern; here's how it maps onto serious AI agents in 2026, and why it's the fifth discipline that finally closes the arc.
OpenSpec in 2026: The Operating System for Spec-Driven Development
Six weeks ago I installed @fission-ai/openspec. Yesterday I shipped a 14-file change in 90 minutes from a 200-line spec, in a brownfield codebase three engineers have been editing for two years — no merge conflicts, no review escalation. This is the senior-architect deep-dive on why OpenSpec is the first SDD tool that doesn't collapse under production reality.
Evals in 2026: The Test Suite for Systems That Aren't Deterministic
Your AI feature worked yesterday and fails today. No code change, no prompt change, no model change. That's what life without evals looks like. This is the third leg of the spec → context → evals trinity — and the discipline most teams skip.
What's Included
- Senior-level system design expertise
- Architecture decisions aligned with business goals
- Scalability, reliability, and performance focus
- API, data, and integration design
- Security and observability considerations
- Clear diagrams and actionable recommendations
What You'll Achieve
- Clear and scalable system architecture
- Reduced long-term technical risks
- Better alignment between tech and business
- Improved system reliability and operability
- Confidence in future scaling decisions
Ready to Get Started?
Contact us today to learn more about how this service can help you