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
MCP for Engineering Teams: Connecting Your Internal APIs to AI Without Regretting It
The developer explainer told you what MCP is. This is the other conversation — the one for whoever owns the systems: what connecting internal APIs to AI actually costs, where the security boundary belongs, and when to build the integration in-house versus bringing in review.
REST API Design That Survives: Versioning, Auth, Errors, and the Parts Nobody Teaches
Anyone can ship an endpoint. The APIs that survive five years of consumers, migrations, and 3 a.m. incidents are designed around the boring parts: versioning you can live with, auth that fails closed, errors machines can parse, and pagination that doesn't lie.
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.
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