Engineering as a service, not a ticket.
You don't need a vendor with a portfolio of templates — you need someone who ships production systems. Each engagement is scoped, priced up front, and delivered milestone by milestone.
I design and ship AI agents that go beyond demos: grounded on your data, instrumented with tracing, and evaluated against real failure modes before they ever touch production traffic.
What you get
- Agent architecture and tool design tailored to your domain
- Evaluation harness with regression tests for every prompt path
- Observability, tracing, and cost controls
- Human-in-the-loop review for high-stakes decisions
- Agent architecture & tool design
- Evaluation harness
- Observability & tracing
- Human-in-the-loop review
- 01Discovery
Map the workflows, data, and failure modes that matter.
- 02Prototype
A working agent on real data within two weeks.
- 03Harden
Evals, tracing, and guardrails for production.
- 04Ship
Deploy with monitoring, alerts, and handoff paths.
Fixed Scope
A well-defined agent system with a clear spec.
Retainer
Ongoing agent engineering and iteration.
Audit
Review and harden an existing agent stack.
Can you work with our existing LLM stack?
Yes. I work with any provider — OpenAI, Anthropic, open-source models via providers — and will match whatever you already use.
How do you evaluate agent reliability?
Every agent ships with an evaluation harness: golden datasets, regression tests for each tool path, and tracing to catch drift after launch.
From event ingestion to warehouse modeling, I build data platforms that stay fast as your volume grows and never lose an event.
What you get
- Event pipeline and ingestion architecture
- Warehouse modeling and transformations
- Streaming ingestion with replay guarantees
- Monitoring, alerts, and data quality checks
- Pipeline architecture
- Warehouse modeling
- Streaming ingestion
- Monitoring & alerts
- 01Map
Sources, events, and reporting needs.
- 02Pipe
Ingestion with exactly-once semantics.
- 03Model
Warehouse layers that answer questions fast.
- 04Watch
Freshness, quality, and alerting.
Fixed Scope
A defined pipeline or migration.
Retainer
Ongoing data engineering.
Can you work with our existing data stack?
Usually yes. I will meet your stack where it is, and only propose changes where they earn their keep.
When you need a whole product shipped, I assemble the stack, build the system, and take it to production — handling design, engineering, and launch in one engagement.
What you get
- Product scoping and architecture
- Full-stack implementation
- Design system and front-end build
- Deployment, monitoring, and handover
- Product architecture
- Full-stack build
- Design system
- Launch & handover
- 01Scope
Product spec, scope, and milestones.
- 02Build
Weekly shippable increments.
- 03Polish
Design, performance, and edge cases.
- 04Launch
Deploy, monitor, and hand over.
Fixed Scope
A fully-specified product build.
Retainer
Product team augmentation.
Can you own the whole product?
Yes. Many engagements are product-to-launch: I scope, build, design, and deploy, with you reviewing every weekly increment.
Money movement is unforgiving. I build ledgers, payment flows, and reconciliation systems engineered for correctness under pressure — where a missed cent is a bug.
What you get
- Payment flow and provider integration design
- Immutable ledger with audit trails
- Automated reconciliation and exception handling
- Compliance hooks and failure drill plans
- Payment flow design
- Ledger & reconciliation
- Compliance hooks
- Failure drill plans
- 01Model
Money flow, accounts, and state machines.
- 02Build
Ledger core with idempotency and audit logs.
- 03Drill
Simulate failures and prove recovery.
- 04Ship
Roll out with monitoring and reconciliation.
Fixed Scope
A complete payments flow with a defined spec.
Retainer
Ongoing payments engineering and support.
Do you integrate with African payment providers?
Yes — Flutterwave, Paystack, and international providers like Stripe and Adyen are all in the toolbox.
Slow is a bug. I profile, load-test, and harden systems so your p95 stays flat during traffic spikes and your on-call sleeps through the night.
What you get
- Load and soak testing with real workloads
- Latency profiling and bottleneck removal
- Incident response playbooks
- SLO dashboards and alerting
- Load & soak testing
- Latency profiling
- Incident playbooks
- SLO dashboards
- 01Profile
Find the actual bottlenecks.
- 02Test
Break it under load on purpose.
- 03Fix
Remove the tail, measure the win.
- 04Protect
SLOs, alerts, and runbooks.
Fixed Scope
A performance engagement with defined targets.
Retainer
Ongoing reliability engineering.
What does a typical engagement improve?
Most engagements cut p95 latency by 40-70% and reduce on-call pages by eliminating the known tail, within the first few weeks.
Regulated industries need systems that can prove they are safe. I harden applications, model threats, and build the audit trails regulators actually ask for.
What you get
- Threat modeling and security review
- Access control and least-privilege design
- Audit logging and immutable trails
- Compliance runbooks for SOC 2 / ISO 27001
- Threat modeling
- Access control review
- Audit logging
- Compliance runbooks
- 01Assess
Map assets, threats, and gaps.
- 02Remediate
Close the highest-risk gaps first.
- 03Prove
Build the evidence trail.
- 04Maintain
Runbooks and continuous monitoring.
Audit
A comprehensive security assessment.
Fixed Scope
Specific hardening projects.
Do you handle SOC 2 preparation?
I build the technical controls and evidence trails that make SOC 2 and ISO 27001 audits straightforward — working alongside your compliance team.
Discovery & Architecture Audit
A free 30-minute review of your stack, followed by a written plan: scope, milestones, and the highest-impact improvements ranked by ROI.
Scoped Build
Fixed-price delivery in short milestones with weekly demos. Transparent async updates, no surprise invoices, and no hand-wavy timelines.
Handoff & Long-Term Care
Documented systems, CI/CD in place, and an optional retainer for maintenance, monitoring, and iteration — you stay the owner.
Common questions, answered upfront.
What do you need from me to start?
A one-page brief is enough: the problem, the users, and what success looks like. I will ask the sharp questions from there.
How fast do you reply?
Within 24 hours on weekdays, usually faster. If I am fully booked, I will say so and recommend someone good.
Do you work with early-stage teams?
Yes — a fixed scope with weekly increments works well for startups that need momentum without a hiring cycle.
Can you join an existing team?
Yes. Retainer engagements embed me as a senior engineer on your team, shipping alongside your people.
Have a system that needs building?
Let's talk about your project — I'll tell you honestly if it's a fit, and give you a clear path to ship.
hello@martinsai.name.ng · Response within 24h