We build full-stack TypeScript applications from Lambda functions to React frontends — TDD-first, pair-programmed, and designed to be owned by your team.
We Build in TypeScript.
We Scale on AWS.
We Run Revenue on HubSpot.
SiteIT Solutions is a bespoke software agency for mid-market companies that need production-grade TypeScript applications, event-driven AWS serverless infrastructure, and HubSpot implementations that connect your product to your revenue operations.
✓ AWS Partner Network · ✓ HubSpot Solutions Partner · ✓ TypeScript-first delivery
import { SQSEvent } from 'aws-lambda';
import { logger } from './lib/logger';
export const handler = async (event: SQSEvent): Promise<void> {
for (const record of event.Records) {
const payload = JSON.parse(record.body);
logger.info({ msg: 'Processing event', payload });
// process with full type safety...
}
};Trusted Technologies & Partner Network
What We Build
We specialize in three interconnected disciplines — because your codebase, your cloud, and your CRM need to speak the same language.
We design and build event-driven AWS infrastructure using Lambda, SQS, SNS, and EventBridge — with CDK infrastructure-as-code and full observability baked in.
We implement HubSpot from the data model up — API integrations, webhook pipelines, custom properties, CMS themes, email templates, and workflow automation that connects your product to your revenue operations.
Why SiteIT
We Go Deep, Not Wide
We're not a generalist shop. We go deep on three problems — and we've seen enough of them to know what breaks.
TypeScript-first, not TypeScript-capable
We don't bolt TS onto a Java shop. TypeScript is our primary language across frontend, backend, and cloud infrastructure — so your codebase speaks one language end to end.
Serverless architecture, not just serverless hosting
Lambda as application design from day one — not lift-and-shift. We architect event-driven systems with SQS, SNS, and EventBridge baked in from the first commit.
HubSpot configured for your data model
We rebuild the object schema before touching a workflow. Not HubSpot's defaults — yours. API integrations, custom properties, and pipeline automation that actually reflects your business.
Bespoke means you own the code
No platform lock-in. Your engineers inherit clean, tested TypeScript they can extend without us. We build for handoff from day one.
Engagement Models
We Work the Way You Need
Most agencies offer one model. We offer the one that fits your team — or the one that replaces one.
Build For You
SiteIT owns full delivery — architecture, development, testing, deployment. You provide the requirements and product direction; we provide the engineering.
“We take full ownership of delivery — from architecture decisions to production deployment. You stay in the loop without being in the weeds.”
Best For
Companies without an in-house team, or teams at capacity
Embed With Your Team
Our engineers integrate into your team — same repo, same standups, same sprint cadence. Peer-level collaboration with built-in TypeScript/AWS/HubSpot knowledge transfer.
“We integrate into your team — same repo, same standups, same standard of delivery. No vendor-client dynamic. Peer engineers who happen to specialize in what you need.”
Best For
Teams needing to add TypeScript, AWS, or HubSpot expertise
How We Build
From brief to production — five phases, test-first, AI-assisted, and built on TypeScript and AWS.
Discovery Phase
TypeScript AuditAWS AssessmentHubSpot AuditEvery engagement begins with a structured technical discovery. For TypeScript projects, we review existing codebases or define a clean architecture from scratch — assessing type coverage, test strategy, and module boundaries. For AWS work, we map the event-driven requirements against Lambda, SQS, SNS, and EventBridge to design the infrastructure topology before a line of CDK is written. For HubSpot implementations, we audit the existing CRM data model — object hierarchies, lifecycle stages, pipeline stages — and document what needs to be redesigned before any workflow automation is built. Discovery ends with a written architecture brief that both teams have verified.
Planning Phase
CDK IaCTypeScript InterfacesHubSpot Data ModelPlanning translates the architecture brief into a sprint-level roadmap. TypeScript API contracts and interface definitions are written before any implementation begins — so both the frontend and backend teams have an agreed-upon shape for the data. AWS infrastructure stacks are scoped as CDK constructs, versioned from day one, and reviewed before provisioning. HubSpot custom object schemas, property groups, and pipeline configurations are designed in full before any portal changes are made. Milestones are set around deployable increments — every sprint ships something observable.
Build Phase
TypeScriptTDDClaude CodeAWS LambdaJest / VitestBuild is where the architecture becomes code. We develop in TypeScript strict mode throughout — no implicit any, no escape hatches. Tests are written before implementation (Test-Driven Development): a failing test defines the contract, passing the test is the definition of done. Claude Code is an active pair partner in this phase — not autocomplete. AI assists with architecture review, implementation generation, and code quality feedback in real time, accelerating delivery without compromising coverage. Lambda handlers are built as stateless, event-driven units. HubSpot private apps and API integrations are coded and version-controlled — not configured in the portal UI.
Analysis & Iteration
CloudWatchX-RayHubSpot SandboxIntegration TestsAfter each sprint increment, we validate the build against both automated and real-world conditions. Integration tests run against AWS services in a staging environment — not mocks. CloudWatch structured logging and X-Ray tracing are configured as part of deployment, not added as an afterthought. HubSpot changes are validated in a sandbox portal before touching production. TypeScript strict compilation and automated test coverage gates run in CI on every push. Stakeholder demos close each sprint cycle — feedback is incorporated in the following planning phase, not deferred to a release.
Continuous Improvement
X-Ray TracingHubSpot AnalyticsRetainerTypeScriptPost-deployment, we stay in the loop. AWS CloudWatch dashboards and X-Ray service maps give us live observability into Lambda invocation patterns, error rates, and SQS queue depths — so we catch performance gaps before they become incidents. HubSpot reporting surfaces CRM data quality, workflow enrollment rates, and lifecycle stage velocity. We run a TypeScript version upgrade cadence as the ecosystem evolves. For clients on a retainer, SiteIT engineers remain available for new feature development, infrastructure scaling decisions, and HubSpot process improvements. The relationship doesn't end at handoff.
See this process applied to real TypeScript, AWS, and HubSpot projects.
See How We've Applied This →The Stack Behind the Work
We go deep on three layers: the application, the cloud, and the CRM. Every engagement is TypeScript-first, serverless where it matters, and connected to HubSpot to close the revenue loop.
Application Layer
Cloud Infrastructure
Revenue & Integrations
Built. Deployed. Owned.
Real numbers from real projects — across TypeScript, AWS, and HubSpot.
Our Work
Work That Ships
Real projects. Real stack. Real outcomes.
Migrating a Legacy REST API to a Type-Safe NestJS Monorepo
A B2B payments platform needed to replace an aging Node.js API with production-grade TypeScript. We rebuilt from the ground up with NestJS, full TDD coverage, and a shared types package consumed by three frontend applications.
Results
- ●Zero regressions after migration
- ●Test coverage from 12% to 94%
- ●TypeScript-only monorepo with full CI/CD ownership transferred to client team
Event-Driven Order Processing at Scale with Lambda & SQS
An e-commerce operator processing 50k+ orders/day needed a resilient, cost-efficient backend. We designed an event-driven architecture with Lambda, SQS dead-letter queues, and SNS fan-out, deployed with CDK infrastructure-as-code.
Results
- ●Processing cost reduced vs. prior ECS cluster
- ●High availability over 6 months post-launch
- ●Full CDK IaC — infrastructure reproducible rapidly
Rebuilding a HubSpot CRM Data Model for a SaaS Revenue Team
A SaaS company had 3 years of dirty HubSpot data and workflows built on default properties. We rebuilt the object schema, created a custom product-to-deal association, and wired a HubSpot API integration to their TypeScript backend.
Results
- ●Pipeline visibility significantly improved across tracked deals
- ●3 manual reporting processes fully automated
- ●HubSpot API integration with real-time sync to product database
Ready to Build Something Precise?
Tell us what you're building. We'll respond within one business day.
Send Your Brief
Prefer to talk first?
Book a 30-minute discovery call. We'll learn about your project and see if there's a fit — no commitment required.
Book a 30-min Discovery CallWhat to expect
- 1
We review your brief
Within 24 hours an engineer reviews your message and identifies the right approach.
- 2
Discovery call
30 minutes to understand your stack, requirements, and timeline.
- 3
Scope & proposal
We scope the work and send a proposal. Billing is $125/hr per consultant, invoiced weekly.
- 4
We get to work
We start with your first sprint — architecture, tests, and working code.