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OLEKSII KUZNIETSOV
Telegram: @thunder follower
[open contact info](look above in the "contact info" section) ⋄ [open contact info](look above in the "contact info" section)

PROFILE
Senior Software Engineer with strong depth on both sides of the stack: production backend and mobile systems.
Owns products end to end (architecture, APIs, clients, deployment, and team direction). Used to taking on the
hard cross-cutting work that turns a working app into a reliable production system. Experience in MedTech and
AI-powered products, with a Master’s focus in ML and CV. Leads by example: mentoring engineers, setting technical
direction, and delivering complete outcomes.

TECHNICAL SKILLS

Languages Python, Go, TypeScript, JavaScript, Dart, Kotlin, Java, Swift, PHP, C/C++
Backend Django, Node.js (NestJS, Express, Next.js), Gin, Laravel, Java Spring
Data PostgreSQL, MongoDB, SQLite, Firebase, ChromaDB
AI / ML CV, fine-tuning, BERT/RoBERTa, PyTorch, TF, LLM/RAG, YOLO, CNNs, Google ML Kit, ARKit
Infra Docker, CI/CD, AWS, Google Cloud, Terraform, MinIO, Redis
Frontend React, Next.js, Vue.js
Mobile Flutter, Android SDK, iOS
Quality Unit/integration/golden tests, profiling; SonarQube, Ostorlab, Patrol

EXPERIENCE
Senior Software Engineer / Team Lead 2022 – Present
Sparrow BioAcoustics (Canada) — MedTech
• Owned full delivery cycle for AI-powered healthcare products: architecture, implementation, release, and ongoing
optimization.
• Built and maintained backend platforms for clinical data collection and labeling (Django, Next.js) used by ML
and product teams.
• Built an admin panel for clinic operations: managing clinics, users, and operational workflows for internal and
hospital staff.
• Developed NestJS backends for production mobile apps alongside Flutter clients.
• Collaborated closely with ML engineers on model I/O and performance.
• Designed scalable client-server architecture; profiled and eliminated bottlenecks in C++ audio engines and
application runtimes.
• Deployed and operated services with Docker and cloud infrastructure; worked under HIPAA constraints (multiple
certifications).
• Enforced high quality bar: unit/integration with 90%+ coverage across owned backend and mobile codebases.
• Led product delivery across mobile and backend while mentoring engineers and testers, running code reviews,
and driving technical roadmap decisions.
Founder / Software Engineer 2025 – Present
Personal Startup — Fitness product
• Owning product architecture end-to-end: mobile client, backend APIs, and infrastructure.
• Exploring CV features for workout planning and user guidance as part of the product vision.
Middle Flutter Developer → Tech Lead 2022 – 2023
Enzobit → Beatoken (Denmark)

• Built NFT marketplace and crypto wallet apps; owned Flutter architecture and code quality.
• Developed Express.js backends for marketplace and wallet flows.
• Mentored juniors and enforced review standards in a fast-moving product environment.
Flutter Developer (Freelance) 2020 – 2023
• Delivered multiple client-server products full-cycle: requirements, implementation, release, support.
• Strong practice in estimation, client communication, and autonomous ownership of delivery.
Flutter Developer 2021 – 2022
Ubrainians (Ukraine)
• Shipped commercial apps (Cvety.kz, Studentocity) across UI, networking, and business logic.
Java Spring & Android Native Developer 2021 – 2022
NDA (Ukraine)
• Implemented features and fixed critical bugs in Kotlin/Java on high-load platforms with strict performance
SLAs.
Full-stack Developer (Freelance) 2018 – 2021
• Built frontend (React.js) and backend (PHP, Java Spring) for international clients.
• Delivered a school website from scratch: UI, frontend logic, and backend integration.
QA Tester 2019 – 2020
Utest.com, Test.io
• Manual testing of web/mobile apps; detailed bug reports; strong grounding in edge cases and product quality.

EDUCATION
National Technical University of Ukraine ”Igor Sikorsky Kyiv Polytechnic Institute”
Bachelor’s Degree in Informatics and Computer Engineering (software engineering)
Master’s Degree in Informatics and Computer Engineering (ML and Computer Vision)
Killhouse / 3rd Separate Assault Brigade
Certified FPV Engineer

LEADERSHIP & TEACHING
Technical Lead — Student Council, KPI
• Led internal software tools for university students; mentored student developers.
Physics & Mathematics Tutor
• Taught school and early-university students; prepared pupils for External Independent Testing and university
physics exams.

ADDITIONAL
Languages: English (B2), Ukrainian (Fluent)
Interests: Applied ML/LLMs, hiking, cycling, gym