Michael Rajkumar Muthuswamy David
Senior Technical Writer / Documentation Lead • API • Platform • Cloud • Security

Documentation that speeds adoption and reduces support load

Developer docs that ship with the product — and hold up in production.

I lead and deliver documentation for APIs, platforms, cloud infrastructure, and security workflows. My focus is accuracy, testability, and a user journey that gets teams from first success to advanced operations.

View writing samples View resume
API
OpenAPI • REST • examples & errors
Docs
Docs-as-code • reviews • quality gates
Ops
Kubernetes • Linux • runbooks

Writing Samples

Nineteen complete samples across documentation styles. Use the filters below or browse by category.

API & Developer Documentation

Sample API Documentation

Payments API mini-portal: auth, endpoints, pagination, idempotency, errors, and examples.

API Docs REST Errors
Read

GraphQL API Documentation

GraphQL reference: schema overview, queries, mutations, pagination patterns, and error handling.

GraphQL API Schema
Read

Quickstart Guide

Developer onboarding: from zero to first API call with authentication, examples, and troubleshooting.

Onboarding API Quickstart
Read

OAuth 2.0 Authentication

Authentication guide: authorization flows, PKCE, token management, scopes, and security best practices.

OAuth Security Auth
Read

CLI Tool Reference

Command-line documentation: installation, commands, flags, output formats, configuration, and shell completions.

CLI Reference Tools
Read

Release Notes Sample

Changelog format: version headers, categorized changes, breaking change migration guides, and deprecation timelines.

Release Notes Changelog Migration
Read

DevOps & Infrastructure

Docs-as-Code with MkDocs

How to structure docs, enforce quality checks, and publish via CI — with practical patterns.

Docs-as-code CI IA
Read

Kubernetes Troubleshooting

CrashLoopBackOff explained: a safe diagnosis workflow, commands, root causes, and fixes.

Kubernetes Runbook Ops
Read

Docker Deployment Guide

Container documentation: Dockerfiles, multi-stage builds, Compose, security best practices, and troubleshooting.

Docker Containers DevOps
Read

Hardware Documentation Sample

Installation and verification guide for a server NIC in a data center environment.

Hardware Installation Verification
Read

Security

Linux Security Hardening Baseline

Practical hardening guidance: SSH, firewall, logging, patch hygiene, and verification.

Security Linux Baseline
Read

Solution Brief: Secure API + Webhooks

A repeatable blueprint: problem, architecture, rollout plan, security controls, and troubleshooting signals.

Solution Brief Security Webhooks
Read

AI & Emerging Tech

AI Prompt Engineering Guide

Best practices for crafting effective prompts: structure, patterns, output formatting, and iteration strategies.

AI LLM Prompts
Read

AI API Integration Guide

Developer guide for integrating LLM APIs: authentication, streaming, error handling, and cost optimization.

AI API Integration
Read

Transformer Architecture Explained

Deep dive into how Transformers work: tokenization, embeddings, attention mechanisms, and the architecture behind modern LLMs.

AI Architecture Deep Dive
Read

Blockchain Technology Explained

Comprehensive guide to blockchain: cryptographic hashing, consensus mechanisms, smart contracts, and when to use distributed ledgers.

Blockchain Cryptography Deep Dive
Read

Process & Templates

Demo Runbook: 10-Minute Integration Demo

A rehearsable demo script: signature verification, queue decoupling, idempotency, dashboards, plus FAQ/objections.

Enablement Demo Reliability
Read

Incident Postmortem

Blameless postmortem template: timeline, root cause analysis, impact assessment, and actionable follow-ups.

SRE Postmortem Incidents
Read

Architecture Decision Record

ADR template: context, decision drivers, options analysis, consequences, and implementation guidance.

ADR Architecture Decisions
Read

Case Studies

Representative outcomes and working style. I can provide role-specific details during interviews.

API docs that reduce integration friction

  • Problem: Customers struggled with authentication, retries, and error handling.
  • Approach: Standardized endpoint patterns; added examples for success and failure; clarified idempotency, pagination, and rate limits.
  • Result: Faster time-to-first-success and fewer support escalations tied to integration mistakes.

Docs-as-code that ships on release day

  • Problem: Docs slipped because reviews and publishing were manual and late.
  • Approach: Introduced PR-based reviews, preview workflows, link/build checks, and release-aligned doc planning.
  • Result: Faster review cycles, fewer late surprises, and consistently on-time publication.

Operational runbooks that stabilize production

  • Problem: On-call outcomes varied because troubleshooting lived in tribal knowledge.
  • Approach: Created runbooks with triage checklists, safe commands, decision points, and clear escalation inputs.
  • Result: More consistent incident response and smoother handoffs between ops and engineering.

Security guidance that is implementable

  • Problem: Security requirements were policy-heavy and hard to apply consistently.
  • Approach: Converted requirements into a practical baseline with verification steps and exception handling.
  • Result: More consistent hardening across hosts and easier audits because controls are explicit and testable.

What I Deliver

Deliverables I lead and produce for product, platform, and infrastructure teams.

API & Developer Documentation

  • API reference: auth, endpoints, examples, errors, rate limits
  • Developer onboarding and quickstarts
  • Integration troubleshooting and FAQs
  • Release notes and breaking-change communication

Platform, Cloud & Operations Docs

  • Deployment guides (Kubernetes/Linux environments)
  • Operational runbooks and incident-response playbooks
  • Monitoring/observability documentation (alerts, dashboards, SLO context)
  • Upgrade, migration, and rollback procedures

Security Documentation

  • Hardening baselines and secure configuration guidance
  • Least-privilege documentation for access control
  • Audit-friendly verification steps and evidence collection
  • Security posture and operational controls (documentation focus)

Documentation Systems & Quality

  • Docs-as-code workflows: reviews, versioning, publishing patterns
  • Information architecture and navigation design
  • Templates, style guides, and reusable content patterns
  • Content audits, cleanup, and migrations

About

I’m a Senior Technical Writer and Documentation Lead who helps engineering teams ship documentation users can trust. In fast-moving products, docs often become a last-minute deliverable — which creates production risk, support tickets, and frustrated customers. My job is to remove that risk.

I work closely with engineers and product owners to capture real behavior (not just intent), then turn it into documentation that is structured, testable, and easy to maintain. That includes API reference content with examples and error models, onboarding paths for developers, and operational runbooks that help teams diagnose issues quickly.

If you need someone who can both lead documentation work (planning, standards, reviews, quality gates) and still deliver hands-on content, I’m comfortable in that role.

How I work

  1. Start with the user journey (first success → scale → operations).
  2. Make docs testable (inputs/outputs, expected results, versioning).
  3. Write with intent (clear nouns/verbs, consistent terminology, minimal ambiguity).
  4. Ship iteratively (draft early, review often, improve continuously).

Contact

I respond quickly and can share additional samples on request.

Email: muthuswamy.david.linkedin@gmail.com

Location: Remote • open to global opportunities

Availability: Full-time • Contract