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Engineering insights

Practical decision frameworks, case studies, and technical guides from teams who build production software every day.

30 Articles 17 Frameworks 4 Case Studies 9 Guides

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30 articles

Decision Framework 12 min read

Build vs Buy Software: The Complete Decision Framework for 2025

Should you build custom software or buy an existing solution? A complete decision framework with cost analysis, trade-offs, and real-world examples.

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Kairosys ·
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Case Study 10 min read

How We Migrated a $2B Fintech Payment System With Zero Downtime

A case study on modernizing a fintech payment platform using the strangler fig pattern — reducing processing time by 60% with zero downtime.

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Kairosys ·
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Decision Framework 9 min read

AI Agents vs Traditional Automation: When to Use Each

AI agents and traditional automation serve different purposes. Learn when to use each approach and how to combine them for maximum impact.

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Kairosys ·
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Technical Guide 10 min read

The AI Production Gap: Why Your Pilot Never Reaches Production

Most AI experiments never become production systems. Learn the common failure patterns and how to bridge the gap from proof of concept to reliable production.

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Kairosys ·
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Decision Framework 11 min read

Legacy Software Modernization: Rewrite vs Refactor

Should you rewrite your legacy software from scratch or refactor incrementally? A practical comparison with real-world examples and decision criteria.

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Kairosys ·
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Case Study 10 min read

Multi-Tenant Architecture: How We Cut SaaS Costs by 70%

How we redesigned a single-tenant SaaS platform to support multi-tenancy, reducing per-customer infrastructure costs by 70% while improving isolation.

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Kairosys ·
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Decision Framework 9 min read

In-House Team vs Technology Partner: An Honest Comparison

Should you hire an in-house team or work with a technology partner? An honest comparison of cost, speed, quality, and control for each approach.

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Kairosys ·
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Case Study 8 min read

How AI Document Processing Reduced Healthcare Admin by 94%

A healthcare network reduced clinical document processing from 45 minutes to 2.5 minutes per document using an AI pipeline with 99.7% accuracy.

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Kairosys ·
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Decision Framework 9 min read

MVP vs Full Product: When to Start Small and When to Go All In

Should you build an MVP or the full product? A guide to making the right investment decision based on your stage, market, and risk tolerance.

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Kairosys ·
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