Codify SaaS Blog - Page 6
Code-first guides and deep dives on building B2B SaaS products, designing APIs, scaling web apps, and modernizing legacy software.
Twilio SMS Verification & Alerts in NestJS
An unprotected SMS endpoint is a public form attached to your credit card. Here's a production Twilio SMS verification setup in NestJS: OTPs in Redis, toll-fraud defense, E.164 formatting, async delivery webhooks, and the rate limiting that actually keeps a code secret.
SaaS Team Invitation System Implementation Guide
How to implement a SaaS team invitation system in NestJS with token-based invites, email delivery, role assignment at acceptance, and invitation management UI.
SaaS Slack Integration: OAuth, Notifications & Commands
Meeting users in Slack turns your app from a tab they forget into a workspace they live in. Here's a production NestJS Slack integration: multi-tenant OAuth, HMAC signature verification, Block Kit notifications, and slash commands that ack in time and process in a queue.
SaaS Multi-Currency Support in PostgreSQL
Store money in a FLOAT column and your ledger drifts away from your bank balance one fraction of a cent at a time. Here's multi-currency support done right in PostgreSQL: integer or NUMERIC money, immutable historical FX rates, conversion in SQL, and staying in sync with Stripe.
Real Estate SaaS MLS Integration & Property Data
There's no single 'property database' — there are ~500 MLS boards, each with its own schema and rules. Here's MLS integration done right: RESO Web API over legacy RETS, OData delta sync, field normalization, PostGIS map search, edge-proxied images, and staying IDX-compliant.
HubSpot Integration in NestJS: Sync CRM Data
A two-way CRM sync looks simple until your update triggers a webhook that triggers another update, forever. Here's a production HubSpot integration in NestJS: OAuth, ID mapping, behavioral events, the source-attribution lock that breaks circular loops, async webhooks, and rate-limit survival.
How to Review a Software Development Proposal — Red Flags and Green Flags
When you receive a software development proposal, you're evaluating an outsourced team for your most critical asset — your code. Few documents say as much about an agency's expertise as a proposal. Here are the red flags and green flags every founder should look for before signing.
SaaS MVP Over-Engineered? What to Build First
An over-engineered MVP is the most expensive way to learn nothing about your market. Here's the short list of what to actually build first, the enterprise features to defer until a contract asks for them, and the technical debt you're allowed to take on.
How to Price SaaS Development Projects (Agency Guide)
Hourly billing punishes you for being fast and good. Here's how we price SaaS development projects at the agency: value-based packages, a paid discovery phase, three-option proposals, and how to defend the number without discounting your way to bankruptcy.
Fixed Price vs Time and Materials: Software Contracts
How you pay for software quietly shapes the software you get. Here's the honest breakdown of fixed price vs time and materials — the hidden risk premium, the quality incentives each model creates, and the phased hybrid contract we actually recommend.
TypeORM Problems on Large Projects (and Alternatives)
TypeORM is lovely until your tables hit millions of rows. Here are the four TypeORM problems that show up at scale — hidden N+1s, cartesian joins, fragile migrations, runtime type leaks — the alternatives worth evaluating, and how to migrate without a big-bang rewrite.
SaaS Timezone Handling: Storage, Display, Scheduling
Store a recurring 9am reminder as a UTC timestamp and it'll fire at 3am the day the clocks change. Here's SaaS timezone handling that survives DST: UTC for the past, wall-clock plus IANA zone for the future, safe display, zone-aware scheduling, and correct reporting.