Yevhenii Budanov — Senior Software Engineer

01Summary

Hands-on senior engineer with 15+ years of backend, system design and business-process automation experience.

Over the last 7 years I have specialized in production AI systems — LLM-powered applications, RAG pipelines, agentic workflows, and real-time ML services. I work end-to-end: architecture, implementation, deployment, and operations.

I rely heavily on AI-assisted development (Claude, Cursor, GPT-based assistants) to compress prototyping cycles and free up time for the parts that actually matter — architecture, data modelling, and trade-off decisions. My information-security background keeps performance and shipping speed honest about safety.

02Technical Highlights

AI architecture & agentic systemsProduction LLM applications using RAG pipelines, MCP servers, structured tool use, and multi-step agent orchestration for domain-specific use cases.
High-throughput infrastructureEvent-driven services processing thousands of events per second on Kafka/Redpanda with Redis feature stores and graph-based cascade detection.
Cross-platform deliveryShipped production web + mobile applications with shared TypeScript code (React/React Native, Expo, Tamagui) on serverless AWS backends.
MentorshipLed and mentored small distributed engineering teams (up to 10 engineers) across multiple time zones.

03Core Skills

AI & Machine Learning

LLMs & Agents: OpenAI · Anthropic Claude · Llama · Mistral · LangChain · LangGraph · MCP · structured tool use
Retrieval & RAG: FAISS · Qdrant · Weaviate · Chroma · Pinecone · pgvector · embeddings · semantic / BM25 / hybrid search
ML & NLP: scikit-learn · PyTorch · Hugging Face Transformers · XGBoost · LightGBM · NER · summarization · behavioral bias detection
MLOps & Eval: Model calibration · A/B testing · guardrails · latency monitoring · train/serve consistency · LangSmith
Platforms: OpenAI API · Amazon Bedrock · Hugging Face Hub

Languages & Backend

Languages: Python (10+ y) · TypeScript (7+ y) · JavaScript (15+ y) · PHP (10+ y) · SQL (15+ y) · Bash (12+ y)
Python backend: FastAPI · Flask · Django · Pydantic
Node.js: Express · Fastify · native HTTP · WebSocket · frameworkless Lambda · Zod
PHP: Symfony · Laravel
API design: REST · GraphQL · WebSocket · OpenAPI

Data, Events & Real-time

Relational: PostgreSQL · MySQL · Aurora · RDS · SQLAlchemy · Prisma · Doctrine · Eloquent
NoSQL & Search: MongoDB · DynamoDB · Elasticsearch · Redis
Graph: JanusGraph · Neo4j · Amazon Neptune
Event-driven: Kafka · Redpanda · RabbitMQ · event sourcing · CQRS · sagas · DLQ · backpressure
Real-time: WebSocket · Server-Sent Events

Frontend & Mobile

Web: React · Next.js (Server Components, Server Actions) · React Router · TanStack Query · React Hook Form · Vite · Tailwind CSS · CSS Modules
Mobile: React Native · Expo · Tamagui
State: Zustand · Redux · Context API
Web3: Wagmi · Viem · EIP-712 typed-data signing

Cloud, DevOps & Security

AWS: Lambda · ECS/Fargate · S3 · Aurora · DynamoDB · Bedrock · API Gateway · CloudFront · CloudWatch · IAM · Cognito
GCP & Data Stack: BigQuery (partitioning, clustering) · dbt (incremental models, SCD Type 2) · Airflow · Airbyte
IaC & Containers: Terraform · Docker · Docker Compose · monorepo (pnpm) · microservices · serverless
CI/CD & Observability: GitLab CI/CD · GitHub Actions · Prometheus · Grafana · CloudWatch
Testing & Quality: pytest · Vitest · Jest · Playwright · ESLint · Prettier · TypeScript strict mode
Security: JWT · OAuth 2.0 · RBAC · secrets management · HIPAA-compliant deployments · Information Security degree

04Professional Experience

Senior Engineer & Solutions Architect (Contract)

Data Pro Software Solutions · Boston, MA · Remote, contract engagements

Oct 2015 — Present

Long-term engineering contract delivering AI-powered SaaS products and platform engineering for B2B clients. Acted as lead engineer / architect on each engagement, working with project teams of up to 10 engineers across multiple countries. Industries: FinTech, HealthTech, LegalTech, EdTech. Most client names confidential.

Selected projects

Crypto Market Analytics Pipeline2025

End-to-end data pipeline using the modern data stack. Python ingestion with retry/rate-limiting, BigQuery warehouse with partitioning/clustering (~11× scan reduction), three-layer ELT in dbt with incremental models and SCD Type 2 snapshots, Airflow orchestration with freshness checks, Terraform IaC.

Autonomous Research Assistant — Ozmosys2024

AI agent generating structured, citation-grounded research reports. LangGraph-based planner, real-time web crawling with source filtering, retrieval pipeline, factual-consistency guardrails. React/Next.js frontend, Python backend, ChromaDB.

AI Test Scoring Platform2024

Intelligent assessment system for elementary education that grades scanned handwritten student tests. OCR + geometric layout detection, region segmentation across multiple test layouts, rule-based grading. Designed for offline / low-connectivity classroom deployment.

Legal Document Search Engine2023 — 2024

Conversational search over a regulated-industry legal corpus. Llama-2 + ChromaDB for semantic retrieval, hybrid model routing for compliance-sensitive queries.

AI Medical Knowledge Chatbot — JoVE partnership2022 — 2023

HIPAA-compliant RAG chatbot for healthcare professionals. Indexed thousands of medical documents with HuggingFace embeddings, ChromaDB, LangChain orchestration. Custom medical NLP pipeline with citation tracking. Hosted on dedicated infrastructure with client-specific data isolation.

JoVE — Scientific Video Platform2021 — 2022

Full-stack engineer on JoVE (jove.com), a peer-reviewed scientific video journal and education platform used by 1,800+ universities worldwide. Designed initial backend architecture (Symfony + PostgreSQL) and REST API powering a Next.js frontend with SSR/SSG.

Legal & Business Intelligence Platform — Ozmosys2020

Re-architected an award-winning legal data intelligence platform aggregating LexisNexis, WestLaw, Bloomberg and other sources. NLP-powered entity recognition, AI-powered search with faceted filtering, REST API for CRM integrations.

Cross-cutting infrastructure work. Docker, GitLab CI/CD, AWS (Lambda, ECS, S3, Bedrock), Terraform. Established coding standards, review processes, and agile delivery cadence across distributed teams.

Lead PHP Developer

IT Startup, IPTV Services · Kyiv, Ukraine · Remote

Nov 2013 — Oct 2015

Designed CRM and billing platform for an IPTV service supporting thousands of subscribers.
Developed REST API powering user portals and integrations with set-top boxes and OTT apps.
Optimized schema and Memcached caching, reducing key-path latency by ~30%.
Led a 4-person backend team; established Git-based workflows and agile delivery.

Lead PHP Developer

Bilink.ua · Telecommunications · Kyiv, Ukraine

Dec 2009 — Nov 2013

Built custom CRM and billing platform for a regional ISP with thousands of customer profiles.
Developed self-service portal with real-time balance tracking.
Optimized billing logic and SQL queries on heavy operational workloads.
Introduced version control and standardized deployment practices.

05Education

National Technical University of Ukraine — Igor Sikorsky Kyiv Polytechnic Institute

Specialist Degree · Information Security in Computer Systems and Networks · Kyiv, Ukraine · 2002 — 2008

Five-year program; broadly equivalent to a U.S. Master's degree.

06Leadership & Collaboration

Mentored engineers across distributed teams (up to 10 people, 5+ countries).
Led architecture reviews, documented ADRs, owned trade-off decisions across services.
Established peer review, coding standards, and automated linting on multiple codebases.
10+ years of remote-first work across time zones with product, design, and infra teams.

07Languages

English

B1 / Upper-Intermediate · Working proficiency

Ukrainian

Native

Russian

Conversational

08Availability

Open for work

Open to remote roles worldwide · Contract or full-time · Comfortable with async, multi-time-zone collaboration.