Guides
Practical guides to decide and act
AI, automation, websites and apps, cloud: what we learned on real projects, written for the people who make the decisions, with our sources whenever we quote a figure.
- Sep 29, 2026 · 5 min readHow to build an AI agent for your businessHow to build an AI agent that is useful at work: pick the task, write its rules, connect it to your tools, test it on real cases and keep people in control.
- Sep 29, 2026 · 4 min readWhat is n8n? Definition, uses and limitsn8n is a workflow automation tool that connects your software. What it does, how it works, cloud or self-hosted, pricing model and its limits for a business.
- Sep 29, 2026 · 5 min readn8n vs Make vs Zapier: which to choose for an SME?n8n, Make or Zapier: what each tool bills, where your data runs, which one you can host yourself, and how to choose for your business's own workflows.
- Sep 29, 2026 · 7 min readHow much does an app cost? What drives the priceHow much does an app cost? Developer day rates from Silkhom's 2025 barometer, App Store and Google Play fees, and what raises or lowers the days of work.
- Sep 29, 2026 · 5 min readWebsite not showing on Google: causes and fixesYour website does not show up on Google? Check indexing, the noindex tag, robots.txt, your sitemap and redirects. The usual causes, and how to fix each.
- Sep 29, 2026 · 4 min readBpifrance Diag Data IA: eligibility, cost and processBpifrance's Diag Data IA: who qualifies, 8 days of an approved expert over 3 months, cost and subsidy, deliverables, and how to prepare for it.
- Sep 29, 2026 · 4 min readHow to automate supplier invoice processingHow to automate supplier invoices: receipt, AI extraction, checks, matching, approval and posting. And what France's e-invoicing rollout changes.
- Sep 26, 2026 · 7 min readQuestions to ask a cloud migration partner before you signWhat to ask a cloud migration partner before signing: inventory, strategy per app, landing zone and security, cutover and rollback, costs and handover.
- Sep 26, 2026 · 6 min readModernizing a legacy application: where to startWhere to start modernizing a legacy application: assess it, stabilize production, build a test safety net, then replace it piece by piece instead of rewriting.
- Sep 26, 2026 · 6 min readWhat a paid software discovery phase should deliverWhat a paid discovery phase should produce before you commit to a build: decisions, tested risks, estimate ranges, a first milestone and a clean exit.
- Sep 26, 2026 · 6 min readWriting a software project brief that gets comparable quotesWhat to put in a software project brief so partners quote accurately: problem, users, systems, data, budget range, what to leave open, and mistakes to avoid.
- Sep 26, 2026 · 7 min readFixed price or time and materials: choosing a contract modelWhen fixed price or time and materials fits a software project, who carries which risk, and hybrids such as capped time and materials or phased fixed price.
- Sep 26, 2026 · 7 min readEvaluating an AI agent proof of concept before you scale itHow to judge an AI agent proof of concept: success criteria, evaluation sets, cost and latency, human review, data and security boundaries, and failure modes.
- Sep 25, 2026 · 7 min readMigrating hundreds of legacy apps to AWS without stallingA practical method for moving hundreds of legacy VM applications to AWS: inventory, upgrade or rebuild per app, block-split teams, cutover and rollback.
- Sep 25, 2026 · 6 min readHow to cache high-traffic APIs with Redis and ElasticsearchMeasure P95 first, then apply cache-aside, sensible TTLs, invalidation and stampede protection with Redis and Elasticsearch. Plus what you should never cache.
- Sep 25, 2026 · 6 min readReal-time dashboards with Laravel, Redis and WebSocketsHow to build real-time dashboards and alerts on high-volume streams with Laravel: buffered ingestion, queues, broadcasting, aggregation and dynamic thresholds.
- Sep 25, 2026 · 7 min readUsing AI agents safely for code review, tests and deploysA practical guide to AI agents for engineering chores: choosing tasks, tool boundaries, plan-then-act, logged tool calls, reviewable diffs and evaluation.
- Sep 25, 2026 · 6 min readHow to upgrade a critical Java 8 application to modern JavaA practical plan to move a critical Java 8 application to a current LTS release: dependency inventory, stepped upgrades, tests, pitfalls and load testing.
- Sep 25, 2026 · 6 min readHow to secure APIs that handle sensitive or regulated dataPractical controls for APIs carrying banking, energy or utility data: threat modeling, authorization, least privilege, data minimization, secrets, audit logs.
- Sep 25, 2026 · 5 min readFreelancers, agency or partner: how to staff a projectCompare freelancers, agencies and engineering partners on accountability, speed, cost, coordination and quality control, plus a checklist to choose a model.
- Sep 25, 2026 · 5 min readQuestions to ask before hiring a software partnerThe questions to ask a software engineering partner before you sign: who does the work, track record, scope, code ownership, security, handover and red flags.
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