Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/20721454/

Work experience

Fullstack Developer

from 02.2025 to 05.2026 (1 year 4 months)
NDA, Дистанційно (Маркетинг, реклама, PR)

- Technical Support Engineer responsibilities – getting feedback from the users, helping them to set up an integration, solve their problems.
- Maintenance of a company’s platform for educating employees. - Implemented RAG across course materials (articles, pdfs, documents). AI usage for writing code.
- Development of an e-commerce solution used for tracking marketing campaigns, sells, etc. Included tons of integrations with main ads platforms - Meta, TikTok, Google; E-Commerce platforms - Shopify, Magento, WooCommerce. AI usage for writing code.
- Technology stack: Node.js, React.js, PHP, API integrations (Google OAuth, Google Drive/Sheets/Docs, Google Ads, TikTok, Meta, Shopify, Hotjar, etc), AI (RAG, custom skills, plugins, spec-driven development)

Fullstack Developer

from 07.2023 to 02.2025 (1 year 8 months)
CloseCall.ai, Дистанційно (Телекомунікації, зв'язок)

- Implemented AI pipelines for analyzing calls (transcribing audio, manually processing calls records to gather dataset for finetuning model, testing different versions of prompts to find that work the best).
- Implemented RAG functionality for customers to be able to chat about daily/weekly reports, documents (provided by customer, pdf/docx).
- Designed and built platform end-to-end as sole developer, taking it from MVP to production platform used by 30+ call center operators and 20 enterprise customers in Australia.
- Scaled system to handle call volume growth from dozens to ~1,000 calls/day over 18 months, including database scaling and query optimization, and infrastructure scaling.
- Grew from individual contributor to technical lead of a 4-person development team as product and business needs expanded. Platform's growth and stability helped the company secure investor funding.
- Technology stack: Node.js (Nest.js), React.js (Next.js), PostgreSQL, Prisma, Docker, Telephony (Twilio, Vonage, Zadarma, VoIP, SIP, Zoiper), BullMQ, AWS (SQS, ECS, EC2, ECR, S3), AI tools (OpenAI models, AssemblyAI, ElevenLabs), LangChain, Redis, OpenAPI.

Backend developer

from 10.2021 to 07.2023 (1 year 10 months)
Physician Partners, Дистанційно (Медицина, охорона здоров'я, аптеки)

- Implemented a RAG helper across the company's internal knowledge base using an internally deployed AI model.
- Built and maintained backend systems processing terabytes of sensitive patient, doctor, and facility data under HIPAA and PHI compliance, within a 12-person cross-functional team (6 backend, PM, QA, frontend).
- Maintained and extended a dual-database system (Google Spanner as primary datastore, Elasticsearch as read-optimized layer), supporting complex multi-filter/sort operations on tables ranging from thousands to 100M+ rows.
- Optimized large-scale SQL queries, indexing, and caching strategies across datasets up to 100M+ rows.
- Authored technical documentation and onboarding specs for the platform's architecture and workflows, supporting knowledge transfer across a 12-person cross-functional team.
- Tech stack: Node.js, Terraform, Kubernetes, Elasticsearch, Redis, RabbitMQ, GCP (Spanner, Pub/Sub, Functions, Logs), OpenAPI

FullStack Developer

from 02.2020 to 09.2021 (1 year 8 months)
Taker.io, Дистанційно (IT)

- Was part of the team (4 FS, 1 Mobile, 2 QA, 1 PM) as a Full Stack developer
- Developed critical features required by stakeholders based on customer development – integrations with 3rd-party APIs (local payment systems, SMS, CRMs, custom APIs), optimizing DB queries, and resolving performance bottlenecks (during promotional periods)
- Implementing background processing via AWS SQS and AWS Lambda
- Developing a complex system of discounts, promo codes, order live order tracking. (WebSockets and GeoLocation APIs)
Implemented Arabic/RTL localization across the frontend, handling text rendering and locale-specific UI.

Різноробочий

from 02.2019 to 09.2019 (8 months)
..., Житомир (Транспорт, логістика)

- Вантажоперевезення
- Допомога в переїздах, перевезенні речей
- Розвантаження/Завантаження вантажів
- Будівля/Ремонт парканів
- Робота на меблевому виробництві

Education

НТУУ "КПІ" імені Ігоря Сікорського

123 Комп'ютерна інженерія, Київ
Higher, from 2019 to 2023 (4 years)

Additional education and certificates

Genesis Product School

2023, 6 months

Knowledge and skills

• Zendesk
• SQL
• Technical support for users
• MS Excel
• Google Sheets
• Google Docs
• Node.js
• JSON
• JavaScript
• Jira
• Адміністрування CRM
• Ведення CRM
• Responsibility
• Communicability
• Educability
• Stress resistance

Language proficiencies

• English — advanced
• Ukrainian — fluent
• Romanian — beginner