Driving Quality
and Efficiency
in Software Development
Senior SDET & AQA Lead with 10+ years building test automation, CI/CD and performance solutions for web & mobile products. I help engineering teams ship web & mobile products faster and safer through solid test automation and quality strategy.
About
I am a Senior SDET & AQA Lead focused on building reliable, maintainable test automation and quality processes for web & mobile products. Over the last 10+ years, I have worked as a hands-on engineer and a lead, combining deep technical work (frameworks, CI/CD, performance) with mentoring and quality strategy for multiple teams.
My goal is to make releases predictable and safe: move critical checks into automation, integrate them into CI/CD, and align quality work with real business priorities instead of 'test coverage for its own sake'.
What I Do as a Senior SDET / AQA Lead
- Design and evolve test automation architecture for web & mobile (UI, API, integration) using TypeScript/Node.js
- Build and maintain automation frameworks with Playwright, WebdriverIO, Appium, Detox and Flutter integration tests
- Integrate automated tests into CI/CD (GitLab, GitLab CI, Bitrise, AWS) to catch issues before production and make releases predictable
- Define quality strategy and metrics together with engineering and product, focusing on business-critical user flows
- Mentor QA/SDET engineers, set coding standards, code review practices and testing guidelines across teams
- Collaborate with developers and DevOps on performance, reliability and observability improvements
- Design and build AI/ML systems: RAG pipelines, semantic agent routing, embedding optimization, and GPU inference infrastructure
Technologies I Work With
A modern tech stack powering enterprise-grade test automation and quality engineering
Core Stack
TypeScript / Node.js, Playwright, WebdriverIO, Appium, Detox, Flutter integration tests, REST APIs, CI/CD (GitLab, GitLab CI, Bitrise, AWS), Docker, Linux. Python, FastAPI, PostgreSQL + pgvector, PyTorch, ROCm.
Also worked with: Cypress, Java/Selenide, performance and monitoring tools. Redis, asyncpg, tree-sitter, genetic algorithms.
From Junior to Lead
10+ years of continuous growth in QA Automation Engineering
IT Light
Junior QA Automation Engineer
Started automation journey building first test suites
IT Light
Junior QA Automation Engineer
Started automation journey building first test suites
Tamga Digital
QA Automation Engineer
Built automation frameworks for enterprise clients
Tamga Digital
QA Automation Engineer
Built automation frameworks for enterprise clients
Revenue Grid
Middle QA Automation Engineer
Led test architecture for SaaS platform
Revenue Grid
Middle QA Automation Engineer
Led test architecture for SaaS platform
EPAM Systems
Senior QA Automation Engineer
Enterprise-scale automation & team leadership
EPAM Systems
Senior QA Automation Engineer
Enterprise-scale automation & team leadership
Favbet Tech
QA Automation Lead / SDET
Leading QA automation strategy & team
Favbet Tech
QA Automation Lead / SDET
Leading QA automation strategy & team
Experience
10+ years of hands-on engineering and leadership experience in test automation, CI/CD integration, and quality strategy for web & mobile products.
Remote / Hybrid
Tech Stack Deep Dive
Key Responsibilities
- Built and led a TypeScript/Playwright-based automation framework for web & mobile, increasing regression coverage to 80%+ and reducing release time
- Integrated E2E and API tests into CI/CD (GitLab / Bitrise / AWS), catching critical issues before production and cutting production incidents
- Defined quality strategy and critical user journeys together with engineering and product, aligning testing efforts with business impact
- Mentored and coached 5-10 QA engineers, introduced code reviews, coding standards and shared testing practices across teams
- Led mobile automation implementation for iOS and Android using Appium and Detox, stabilizing release cycles
Achievements
- 80%+ Regression coverage achieved for web & mobile products
- Quality gates Integrated into CI/CD pipelines preventing risky releases
- 5-10 engineers Mentored and coached across multiple QA teams
- Mobile automation Introduced for iOS and Android, reducing manual testing cycles
Remote — NDA
Tech Stack Deep Dive
Key Responsibilities
- Designed and built a production RAG pipeline with hybrid search: dense vector retrieval (cosine similarity) + BM25 sparse retrieval, fused with RRF reranking
- Built a custom embedding optimization harness with iterative experiment loops that hill-climb text descriptions using retrieval benchmark feedback (+15% similarity improvement over 14 experiments)
- Implemented semantic routing layer matching queries to 30 specialized expert agents via cosine similarity — achieved hit_rate = 1.000 on 101 validation queries
- Self-hosted GPU inference on AMD RX 7900 XT (20GB VRAM) using ROCm with bfloat16 model weights and batch encoding pipeline (~10–30x faster than sequential)
- Applied genetic algorithm for text genome optimization: population-based search with cosine similarity fitness, single-point crossover, and keyword-level mutation
Achievements
- 100% Agent routing accuracy on 101 validation queries across 30 categories
- +15% Embedding similarity improvement via iterative optimization harness
- 10-30x Faster inference via GPU batch encoding pipeline
- RAG pipeline Hybrid search with HNSW indexing, BM25, and RRF reranking in production
Expertise & Technology Stack
A curated collection of tools and frameworks mastered over 10+ years of building enterprise-grade automation solutions.
Test Automation Frameworks
Enterprise-scale test infrastructure.
Programming Languages
Core engineering capabilities.
CI/CD & DevOps
Infrastructure & Pipeline integration.
Testing Strategy
Comprehensive QA approaches.
Tools & Platforms
Essential ecosystem mastery.
Leadership
Soft skills & Management.
AI & ML Engineering
Building production AI systems: RAG pipelines, semantic routing, embedding optimization, and GPU inference infrastructure. Combining ML research with engineering rigor.
RAG Pipeline Architecture
Hybrid search with dense vectors (cosine similarity) + BM25 sparse retrieval, fused with Reciprocal Rank Fusion reranking
Embedding Optimization
Iterative benchmark-driven optimization with genetic algorithms — response-space prompt phrasing for retrieval alignment
Multi-Agent Routing
Semantic routing layer matching queries to specialized expert agents via 4-axis dense vector encoding
GPU Inference Infrastructure
Self-hosted inference on AMD ROCm with bfloat16 weights, VRAM budget management, and batch encoding pipelines
AI Tools & Platforms
AI Integration Achievements
- Built production RAG pipeline with hybrid vector + keyword search and RRF reranking
- Achieved 100% hit_rate on 101 validation queries across 30 agent categories via semantic routing
- Improved embedding retrieval alignment by 15% through iterative optimization with genetic algorithms
- Self-hosted GPU inference with 10-30x batch encoding speedup on AMD RX 7900 XT (20GB VRAM)
Embracing AI to Build the Future of QA
I actively integrate AI tools into QA workflows, from test generation to code review, helping teams work smarter and deliver faster.
GitHub Activity
478 contributions in the last year
478 contributions in the last year
Top Languages
Selected Projects
Key automation and quality initiatives showing architect-level thinking and hands-on delivery.
Studies
Rate
Focus
Enterprise E2E Automation Framework
Built enterprise test automation platform from scratch serving 20+ teams and 100+ engineers. Reduced regression cycle 90% (3 weeks → 3 days) saving $180k/year. Eliminated 80% of integration tests through contract testing while achieving 95% coverage.
The Challenge
The organization faced a critical challenge: multiple applications built with different technology stacks (React, Angular, Vue) had no unified testing approach. Each team maintained their own testing solutions, leading to inconsistent quality gates, duplicated efforts, and a 3-week regression cycle that was blocking rapid delivery.
The Solution
Architected a modular framework with TypeScript + Playwright as the core, supporting multiple test runners
Impact Analysis
Quantifiable results achieved post-implementation
More Case Studies
What Colleagues Say
Feedback from team members and colleagues I've had the pleasure to work with at Favbet Tech.
For Hiring Managers
If you are looking for someone who can go beyond "writing tests" and take ownership of test automation, quality strategy and CI/CD integration, this is where I can help.
I work best in environments where:
- Quality is treated as a shared responsibility, not just a QA task
- There is room to improve automation architecture and processes, not only "add more tests"
- Teams are ready to collaborate on making releases faster and safer at the same time
Contact
If you would like to discuss a Senior SDET / AQA Lead role, feel free to reach out:
Email: andrey.peretyatko@hotmail.com
LinkedIn: linkedin.com/in/andrew-peretyatko
Location: Montenegro (open to remote / EU-friendly time zones)