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ANATOLII FESENKO CONTACT

Full-Stack Developer [open contact info](look above in the "contact info" section)
LinkedIn
GitHub
WORK EXPERIENCE Telegram
RoBeauty, Remote — Acting CTO / Lead Full Stack Developer
Feb 2026 – Present Location: Mykolaiv, Ukraine
● Built an AI developer agent that scaled the IT department across (Open to relocation)
company projects, taking over the workload of 2–3 developers and
replacing lengthy developer recruitment.
● Launched a Telegram bot connected to the CRM from scratch, HARD SKILLS
giving sales managers a communication channel and self-serve
access to bonuses, order status, and order details; eliminated 15%
Programming: JavaScript,
of information-clarification calls.
● Created 2 monitoring and event-tracking systems for Facebook TypeScript, Node.js, SQL
(Pixel & CAPI), Google Analytics 4, and TikTok (Pixel & CAPI),
improving ad analytics with accurate cost-per-lead and Frameworks, libs: Express, Nest,
conversion-rate figures and raising ad campaign success rates. React, Redux, MobX, Sequelize
● Designed 2 AI-based data collection and analytics systems that
extract detailed insights from ad creatives and transcribe sales calls TypeORM, Electron, Puppeteer,
for pattern analysis and error correction, saving marketing 20–30 Playwright, Telegram Bot API
hours weekly and tripling tested hypotheses and A/B tests.
● Spearheaded 2 revenue initiatives from concept to full DB: PostgreSQL, Redis, Supabase
implementation as part of the top management team, increasing
Web: HTML5, CSS/SASS,
company profit by 3.1% and 3.7%.
Bootstrap, REST APIs
RoBeauty, Remote — Full-Stack Developer
Tools: Docker, Postman, AWS,
Sep 2025 – Feb 2026
● Delivered 20+ automations for the sales, production, and finance Cloudflare, Nginx, Linux, CI/CD
departments to speed up routine CRM tasks: data validation and (GitHub Actions)
autofill, web interfaces for quick editing of gifts, products, and sets,
and automatic addition of gifts to deals. VCSs: Git, GitHub
● Integrated 10+ client-side features connecting Tilda forms to Kommo AI: OpenAI API, LLM integrations,
CRM via custom API bridges, including quick Nova Poshta
city/branch selection and live survey results. AI agents
● Automated 10+ Google Sheets workflows with n8n on a Linux VPS,
Automations: n8n
plus shell-script backups (PostgreSQL, code, Nginx), saving 20
person-hours weekly.
● Configured 10+ webhooks for sending email newsletters and SMS
campaigns to customers.
● Implemented a custom integration with a Polish payment system to SOFT SKILLS
accept local payments.
● Active Listening
NDA (Freelance Team), Remote — Full-Stack Developer
Mar 2023 – Sep 2025 ● Healthy Communication
● Engineered 2 social media traffic-generation bots from scratch with ● Open-Mindedness
Puppeteer and Playwright, scaling to hundreds of instances via
Docker containers and AWS ECS and running 1,000+ successful ● Valuing Diversity
bot instances. ● Strategic Reasoning
● Optimized the lead generation pipeline with algorithm of
transformations, raising subscription conversion by 60% and lead ● Confidence
conversion by 20%. ● Systems Thinking
● Shipped 10+ traffic-management tools: a subscription payment
reminder service, automated proxy activity checker, Docker
container config editors, web page wrappers, and Chrome
extensions for parsing and scraping.
● Developed 6 admin panels within a Telegram bot for business
process management.
● Programmed 10+ single-page applications (SPAs) with React,

Express, and PostgreSQL. LANGUAGES
● Co-developed a Chromium-based anti-detect browser for enhanced
privacy, similar to AdsPower and Dolphin Anty. ● English – B1
● Connected 20+ form-filling integrations that send data to target
● Ukrainian – Native speaker
funnels.

Logistics, TrackEnsure Inc, Remote — Data Specialist Team Lead
Oct 2023 – Sep 2025
● Reviewed 10,000 team reports to identify flaws and technical issues
in team members’ work, raising device problem detection quality by
20%.
● Streamlined spreadsheet operations through automation, cutting
time spent on spreadsheets by 80%.
● Coached team members’ soft and hard skills through weekly 1-on-1
and full-team meetings, driving 30% higher team efficiency, 30%
more verified transactions, and 5% better detection of systemic
errors and bugs.
● Executed a project improving the accuracy of GPS coordinates read
from truck drivers, cutting incorrect driver-log coordinates by 5%.
● Improved service quality, contributing to an 11% annual increase in
customer growth.

Logistics, TrackEnsure Inc, Remote — Data Specialist
Aug 2021 – Oct 2023
● Analyzed 15,000 transactions and documented 50 system
vulnerabilities across 2,000 reports, driving a 30% increase in
system performance.
● Refined the transaction verification algorithm, cutting average
verification time by 8% and increasing detection of potential system
errors by 25%.
● Identified 20 hidden issues in reading and transmitting
driver-logbook data to the server, increasing received data volume
by 4%.
● Mentored and trained 3 interns after being selected for top
performance, laying the foundation for the department’s growth.

Government organization, SOE “Mykolaivstandartmetrology”,
Office — Technological Engineer
May 2018 – Aug 2020
● Tested 150 pieces of precision equipment for compliance with the
highest industry standards and precision requirements.
● Authored 50 calibration standards that set the benchmark for
consistent and reliable equipment assessments.
● Managed the processing and production of 20,000 calibration result
documents under strict quality-control protocols, delivering every
report on time.
● Performed 100 comprehensive calibrations using the latest
reference standards to ensure accurate and reliable measurements.
● Led a validation readiness initiative bringing all departmental
processes into regulatory compliance; completed annual validation,
cutting lead time by 20%.

EDUCATION
National Shipbuilding University— Master’s degree, Information and
measurement technology
Sep 2015 – Dec 2020