NestJS consultant for teams planning a microservices split
Architecture audit plus migration or integration plan. Built by someone who ran a NestJS service across 40+ payment providers at $1B+ unicorn scale.
Who this is for
CTO of a fintech or B2B SaaS validating a NestJS monolith-to-microservices split or an auth and payments integration plan.
The pain today
- Wrong microservice boundaries can cost you months.
- The team has never executed a monolith-to-microservices split.
- Payments integration has no reference architecture internally.
- Leadership wants a document before committing 6 engineers for a quarter.
The outcome you get
- A written NestJS architecture audit.
- A microservices extraction plan with phases, hours, risks.
- An auth and payments integration plan if that is the question.
- Fractional CTO follow-up available if scope grows.
What the NestJS audit covers
The audit reads the module graph, the dependency-injection topology, the controller-to-service-to-repository layering, the auth and guard stack, the ORM patterns (repository vs active record, query builder vs custom SQL), the queue layer, the testing strategy, and the microservice transport choices. For each finding: severity, business-cost framing (latency, uptime, engineer hours, cloud dollars), and estimated hours to fix. The microservice-split question gets its own section: where the bounded contexts actually live, which service moves first, which services stay in the monolith forever.
bolttech Payment Service as the reference architecture
At bolttech I led the NestJS Payment Service integrating 40+ payment providers across Asia and Europe. It shipped 99.9% uptime, 15+ new international markets, and zero post-launch critical bugs. The architecture choices there — provider adapters behind a unified interface, retry policy per provider, idempotency keys everywhere, structured event log, async webhook handlers on BullMQ — are the reference I bring to new payment and orchestration audits. If your NestJS service talks to external APIs and cannot afford to lose a transaction, that codebase pattern is the one to copy.
Sample microservices extraction plan
Three-phase plan for a mid-size NestJS monolith. Phase 1 (2 weeks): identify the one service that must extract — usually the one with different scaling characteristics or different ownership. Phase 2 (4 to 6 weeks): extract that service on shared database first, then on its own database, with the monolith reading via the new API. Phase 3 (2 weeks): deploy separately, set up independent CI/CD, add service-level monitoring. Total: 8 to 10 weeks to extract one service. Repeat only when the business case is clear.
Pricing and deliverable
Advisory engagement at $4,500 per month (pro-rated for 1 to 4 week scope). You get a written architecture audit, a microservices or integration plan, a 60-minute debrief call with leadership, and a 2-week follow-up. If you want me to execute the Applications subscription at $3,499 per month covers implementation. Most teams do the audit first.
Recent proof
A comparable engagement, delivered and documented.
Unified payment orchestration across Asia and Europe
Delivered the payment orchestration platform at bolttech, a $1B+ unicorn, with 40+ integrations across multiple regions.
Frequently asked questions
The questions prospects ask before they book.
- Do you know payment-specific NestJS patterns?
- Yes. bolttech was a 40+ payment provider integration environment. Retry policies, idempotency, webhook handling, reconciliation jobs — that is where I lived for 15 months.
- Is microservices the right answer?
- Usually no — at startup scale. The audit often recommends staying on a modular monolith and extracting only the one service that truly needs independent scaling.
- GraphQL in NestJS?
- Yes. Code-first with TypeGraphQL or schema-first with Apollo. The audit includes a REST vs GraphQL recommendation based on client types and team size.
- How long does a NestJS audit take?
- 1 to 4 weeks. A 100k-line NestJS monolith with tests takes 2 to 3 weeks. Larger multi-service setups take 4.
- Can you cover the frontend too?
- Yes — if the audit is about the full stack. React plus NestJS is a common combination (bolttech was exactly this). The scope gets written up front.
Ready to start?
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