Business workflow guides and development insights

Inside the products: code review and real-time SaaS

Explore the workflows behind two of my builds: how AI PR Reviewer connects GitHub changes to actionable findings, and how ChatKnot connects live conversations to persistent operational data.

Jev AI vs ChatGPT and Claude: should your business use it?

Read the plain-English guide to Jev AI, TypeSafe's new decision model. It compares Jev with ChatGPT and Claude on speed, cost and accuracy, lists real business use cases and limits, and includes a free monthly cost calculator.

Planning a service marketplace MVP?

Use the service marketplace MVP checklist to define the first customer request, provider response and operator handoff. It draws on my attributed React Native workflow experience at Vurks and helps you prepare a build brief before choosing screens.

How do you scale a React and Node.js app past 1,000 concurrent users?

Start with measurement rather than assuming one universal architecture. Common improvements include horizontally scaling stateless Node.js services behind a load balancer, adding appropriate SQL or MongoDB indexes, using connection pools, caching repeated reads with Redis, serving static assets through a CDN, and moving CPU-heavy work to queues or workers. Instrument slow requests and database queries first so each change addresses a real bottleneck.

When should a SaaS product switch from REST to GraphQL?

Consider GraphQL when multiple clients need different views of related data and maintaining those views through REST has become difficult. The tradeoff is additional schema, resolver, caching and authorization work. A simple CRUD product can remain on REST; endpoint count alone is not a reason to migrate. GraphQL also requires an API evolution strategy as clients and fields change.

How do you structure a multi-tenant MongoDB database for SaaS?

One option is a shared database with shared collections: documents carry a tenant identifier, and application reads and writes must enforce the authorized tenant scope. Indexes should reflect the actual tenant-scoped queries. A tenant identifier in a token is not sufficient by itself; the server must validate identity, membership and permissions. Separate databases are another option when operational or isolation requirements justify them.

How do you implement real-time features with Socket.io in a production SaaS?

When Socket.IO runs across multiple servers, a compatible adapter can distribute events between instances. The Redis adapter uses Pub/Sub for that coordination; it is not a durable message store. Authorize room membership and validate event payloads. Design persistence, retries and duplicate handling around your product requirements, because Socket.IO defaults to at-most-once delivery. My ChatKnot case study shows where live events and persistent application data fit in the product.

What is the right database architecture for a multi-tenant SaaS?

For many SaaS products in 2026, PostgreSQL with Row-Level Security (RLS) is a strong option because it can enforce tenant isolation at the database level and supports relational queries. MongoDB can suit document-heavy products with flexible schemas. The right choice depends on access patterns, reporting needs and operational constraints. Avoid adding per-tenant services before compliance or scale requirements justify the extra operational cost.

What makes a Next.js app slow and how do you fix it?

Measure the slow route before choosing a fix. Check server response time, large images, client-side JavaScript and third-party scripts separately. Rendering and caching choices depend on whether data is public, personalized or frequently updated. For JavaScript weight, use the tools in the Next.js package bundling guide to identify expensive dependencies before changing imports or splitting components. Repeat the measurement after each change.

How do you reduce Time to First Byte (TTFB) in a Next.js SaaS app?

Investigate the time spent in network requests, database access and server rendering. Keep the application and database appropriately located, reduce avoidable queries and cache only when the data can safely be reused. Public pages and personalized dashboards have different requirements. Moving execution to an edge location does not guarantee a fast response if it still waits on a distant database.

For a first measurement of a public page, including server response time and real-visitor data, run my website health check.

How do you scope a maintainable SaaS MVP?

Start with one user outcome and map the complete workflow required to reach it. Agree on access rules, data ownership, acceptance criteria and handover expectations before expanding the feature list. Choose tools the team can maintain, document important tradeoffs and test the core workflow. A deadline needs a scope assessment; no fixed number of weeks guarantees a maintainable product. See my SaaS MVP development scope for what to include in an initial brief.

How should a founder budget for a SaaS MVP?

Separate development effort from recurring hosting, database, email, payments and maintenance costs. Estimate the core workflow first, then account for integrations, migration, security requirements and release work. Ask for assumptions and exclusions alongside the quote. I provide a project-specific estimate after reviewing the brief; this page does not promise a universal price or delivery timeline.

To set out the workflow, scope and constraints before asking for quotes, use the website brief builder.

When should a product team choose React Native over Flutter?

Choose React Native when the team already works in JavaScript or TypeScript, web and mobile products share business rules or design systems, and the React ecosystem reduces delivery risk. Flutter can be a good fit for teams invested in Dart or products requiring highly controlled custom rendering across platforms. Evaluate native-module needs, accessibility, hiring, release workflows and long-term ownership - not only prototype speed.