Practical engineering knowledge

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In-depth guides on AI integration, architecture decisions, mobile development, and product design — written by engineers who ship weekly.

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AI & LLMsSystem DesignReact & Next.jsMobileProduct DesignDevOpsTech Consulting

Guides

14 guides,
zero fluff.

TOPICSAI · Architecture · Frontend · Mobile

WRITTEN BYEngineers who ship weekly

UPDATED2025 – 2026

🤖

AI & LLMsAdvanced

Building a production RAG pipeline with LangChain and Pinecone

A step-by-step guide to setting up a retrieval-augmented generation system that handles real production traffic — including chunking strategies, re-ranking, and observability.

RAGLangChainPinecone+2

18 min read

⚡

AI & LLMsIntermediate

LLM fine-tuning vs. RAG: when to use which

Most teams jump straight to fine-tuning when RAG would have done the job in a fraction of the time. This guide breaks down the trade-offs with real examples.

Evaluating AI outputs: a practical framework for production

Benchmark leaderboards lie. This guide walks through how we evaluate AI quality in production — automated evals, human review, and regression testing.

EvalsLLMTesting+1

15 min read

⚛️

React & Next.jsIntermediate

Next.js App Router: patterns we use on every project

After shipping 10+ Next.js apps on the App Router, here are the layout patterns, data-fetching strategies, and error boundaries that we've standardised on.

Next.jsApp RouterReact+1

14 min read

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React & Next.jsBeginner

Server Components vs Client Components: a decision framework

The boundary between server and client components is the most common source of confusion in new Next.js projects. This guide makes the decision mechanical.

Next.jsRSCPerformance+1

10 min read

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System DesignAdvanced

Designing a multi-tenant SaaS architecture on AWS

From database isolation strategies to per-tenant rate limiting — a complete architecture guide for building multi-tenant products that scale without data leaks.

AWSMulti-tenantPostgreSQL+1

22 min read

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System DesignIntermediate

Choosing the right database for your product in 2025

Postgres, DynamoDB, MongoDB, Redis — each has a role. We break down the decision matrix we use when starting new projects based on access patterns and scale.

PostgreSQLDynamoDBMongoDB+1

16 min read

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MobileIntermediate

React Native vs Flutter in 2025: the honest comparison

Both ecosystems have matured. Here's how we pick between them for each client based on team skills, platform requirements, and long-term maintainability.

React NativeFlutteriOS+1

13 min read

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MobileAdvanced

Offline-first mobile apps: architecture and sync strategies

Building apps that work without connectivity is hard. This guide covers conflict resolution, optimistic updates, and background sync patterns we've battle-tested.

React NativeOfflineSync+1

20 min read

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Product DesignIntermediate

Design systems for product teams: from zero to Figma tokens

A practical guide to building a design system that developers will actually use — including token naming conventions, component APIs, and documentation.

FigmaDesign SystemTokens+1

17 min read

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DevOpsAdvanced

Zero-downtime deployments with GitHub Actions and AWS

How we set up blue/green deployments, database migrations, and rollback strategies so our clients never experience downtime during a release.

GitHub ActionsAWSCI/CD+1

19 min read

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Tech ConsultingIntermediate

The tech audit: how to evaluate an inherited codebase

When a client hands you a legacy system, you need a repeatable process for assessing risk, debt, and scalability. This is the checklist we use.

AuditLegacyArchitecture+1

11 min read

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Tech ConsultingBeginner

Writing an engineering spec your team will actually follow

Most specs are either too vague or too detailed. This guide covers the one-page format we use that's detailed enough to build from but light enough to change.

SpecsPlanningEngineering+1

9 min read

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DevOpsAdvanced