Refactor CV content for clarity and impact; update PDF version

content/cv.md

@@ -8,16 +8,18 @@ nik@nik4nao.com | github.com/nikafiq | nik4nao.com
 
 ## PROFESSIONAL SUMMARY
 
-Backend engineer with 3 years of professional experience designing,
-building, and operating distributed backend systems on GCP and AWS.
-Strong in Go and Python, with hands-on production experience in
-high-throughput event-driven services, Kafka-based pipelines,
-Kubernetes, and cloud-native data platforms. Experienced in designing
-systems with strict reliability, ordering, idempotency, retry safety,
-and production-safe migration requirements. Applies AI/LLM tools with
-deliberate guardrails in daily workflows. Trilingual in English,
-Japanese (JLPT N1), and Malay. Strong typed-language foundation and
-able to ramp quickly into Java backend development.
+Backend engineer with 3 years of professional experience building and
+operating Go-based distributed backend systems on GCP and AWS. Strong
+ownership mindset with end-to-end responsibility across architecture,
+implementation, deployment, production reliability, and continuous
+improvement. Known for mechanism-driven problem solving, clear
+technical documentation, and open knowledge sharing across teams.
+Hands-on production experience with high-throughput event-driven
+microservices, Kafka-based pipelines, Kubernetes, and cloud-native data
+platforms. Experienced in designing systems with strict reliability,
+ordering, idempotency, retry safety, security, and production-safe
+migration requirements. Applies AI/LLM tools with deliberate guardrails
+in daily workflows. Trilingual in English, Japanese (JLPT N1), and Malay.
 
 
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@@ -41,7 +43,7 @@ able to ramp quickly into Java backend development.
 - Built cloud-native platforms across GCP, AWS, and Azure using
   Kubernetes, ECS/Fargate, Lambda, Aurora, DynamoDB, and Kafka.
 
-- Bilingual/trilingual engineer (EN/JA/Malay) with daily
+- Trilingual engineer (English/Japanese/Malay) with daily
   cross-functional communication across Japanese and overseas teams.
 
 
@@ -57,28 +59,29 @@ next-generation carrier messaging platform initiative. Designing and
 operating a distributed GCP/GKE backend pipeline bridging high-volume
 upstream message delivery with a downstream consent fulfillment API.
 
-- Proposed and led adoption of a Kafka-based queuing architecture;
-  designed the end-to-end pipeline with GKE, Managed Kafka
-  (8 partitions keyed by account_id), and Cloud Spanner under a
-  1500 TPS downstream global cap with strict per-account_id ordering
+- Designed system architecture and selected Kafka as the messaging
+  backbone based on ordering, reliability, and scalability requirements
+  under a 1500 TPS downstream global cap
 - Designed request coalescing with singleflight, reliable offset commit
   ordering (offsets committed only after durable Spanner writes),
   graceful shutdown, and a cronjob-based retry pipeline — achieving
   at-least-once delivery with no data loss on crash
-- Refactored the user-info-fetch API (a separate Spanner read service
-  accessed by the Gateway aggregator team at 1500 TPS): guided a junior
-  engineer through initial implementation, then led a full refactor
-  introducing hashed phone number lookup, removing non-indexed searches,
-  and tuning indexes — cutting CPU usage by ~30% under sustained load
-- Led Locust performance testing at 120 TPS steady and 600 TPS burst;
-  used results to right-size GKE CPU and memory for stable production
-  behavior
-- Designed OpenTelemetry + Datadog + Wiz observability stack; built CI
-  controls with semantic version tag enforcement and least-privilege
-  Workload Identity
-- Led TDD adoption, authored team dev guidelines, identified and
-  escalated a 1-month deadline slip, and stepped up as informal tech
-  lead during a leadership gap
+- Proposed and implemented hashed phone number lookup in Spanner to
+  avoid access hotspots, eliminate non-indexed searches, and improve
+  CPU efficiency under sustained load
+- Improved team development efficiency by optimizing GitHub Actions
+  CI/CD workflows, scoping full test runs to pull requests, improving
+  build cache usage, and reducing unnecessary image builds to shorten
+  feedback cycles
+- Designed observability for distributed services using OpenTelemetry,
+  Datadog, and tracing to improve production visibility and incident
+  response
+- Authored architecture and design documents, including Kafka adoption
+  rationale and request coalescing design, to align teams through clear
+  written mechanisms
+- Strengthened security and compliance posture by designing logs to mask
+  PII, implementing secure service-to-service authentication with
+  Workload Identity, and enforcing least-privilege access controls
 - Applied AI tools (Copilot, Claude, Gemini, ChatGPT) in daily
   workflows with deliberate guardrails: output validated through testing
   and review, AI excluded from security-sensitive logic
@@ -115,11 +118,11 @@ Azure-based delivery.
 
 | Category | Details |
 |---|---|
-| **Languages** | Go, Python, TypeScript/JavaScript, Java (learning; strong typed-language foundation) |
-| **Backend** | Distributed systems, event-driven architecture, REST APIs, pub/sub, concurrency, retry design, idempotency, fault tolerance |
-| **Cloud — AWS** | ECS/Fargate, Lambda, Aurora/RDS, DynamoDB, Glue, CDK, CodePipeline, Bedrock, Secrets Manager |
+| **Languages** | Go, Python, TypeScript/JavaScript |
+| **Backend** | Distributed systems, event-driven architecture, microservices, REST APIs, pub/sub, concurrency, retry design, idempotency, fault tolerance, familiarity with Protocol Buffers and gRPC through personal projects |
 | **Cloud — GCP** | GKE, Cloud Spanner, Managed Kafka, BigQuery, Cloud Trace |
-| **Cloud — Azure** | Web Apps, ADB2C, Azure Pipelines |
+| **Cloud — AWS** | ECS/Fargate, Lambda, Aurora/RDS, DynamoDB, Glue, CDK, CodePipeline, Bedrock, Secrets Manager |
+| **Cloud — Azure** | Web Apps, Azure AD B2C, Azure Pipelines |
 | **Data** | MySQL, Aurora, PostgreSQL, DynamoDB, Cloud Spanner, Kafka, Redis |
 | **DevOps** | Docker, Kubernetes, ArgoCD, CI/CD, IaC (Terraform, AWS CDK, Ansible) |
 | **Observability** | OpenTelemetry, Datadog, distributed tracing |
@@ -139,8 +142,7 @@ Azure-based delivery.
 | 基本情報技術者試験 (FE) — IPA Fundamental IT Engineer | Aug 2024 |
 | JLPT N1 — Japanese Language Proficiency | Dec 2022 |
 
-*In progress: AWS Solutions Architect – Professional (SAP),
-Applied Information Technology Engineer (AP)*
+*In progress: Applied Information Technology Engineer (AP)*
 
 
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