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Santo S.

NLP & Prompt Engineer · Junior

Indonesia · Rate on request

Professional Overview

Non-coding Advanced Prompt Engineer and AI Evaluator specializing in rule-based instruction architecture. I design robust prompting pipelines and behavioral guardrails to convert unpredictable LLM outputs into deterministic, stable text through rigorous multi-layered iteration cycles.

Experience

Company
Freelance / Independent Projects
Jan 2022 – Jul 2026
Role title
Advanced Prompt Engineer & AI QA Specialist

AI Expertise

NLP & Prompt Engineering Automation & AI Workflows

Skills

Prompt Engineering RAG Statistics Hugging Face

Description of Responsibilities

  • Designed advanced rule-based system prompts and text guardrails.
  • Managed 80+ text iteration cycles to ensure stable LLM outputs.
  • Audited AI responses to eliminate logical errors and hallucinations.
  • Built structured prompt frameworks for precise verification workflows.
  • Optimized prompt contexts and markdown tags for literal output formatting.

Key Achievements / KPIs

  • Reduced AI hallucinations by 40% through strict rule-based guardrails.
  • Optimized prompt contexts to save up to 25% in model token efficiency.
  • Maintained a 95% adherence rate to guidelines across massive test cycles.
  • Successfully executed 80+ iterative cycles for complex workflow prompts.

Education

School
SMA 1 PAKEL TULUNGAGUNG
Jun 2007 – Sep 2009
Degree / Program
High School Diploma

Field of Study: General Studies

Areas of Expertise

NLP & Prompt Engineering

Build natural language processing systems, fine-tune large language models, and craft reliable production prompts for AI-powered products.

Open to

Full-time Part-time Freelance Contract Contract-to-hire

Experience Level

Junior

Current location

Indonesia

Time Zone

Jakarta UTC+7

Primary Work Language

English

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