09/17/2026 updated
100 % available
Senior Full-Stack Engineer | Python, FastAPI, Django, React, Next.js, AWS/GCP | ex-CTO
Chișinău, Moldova
Only remote
Bachelor in Business & Administration, ASEM University (2015-2019)About me
10+ years shipping backend systems, APIs and data pipelines that businesses depend on. Ex-CTO: I take a feature or a whole product from requirements to production, remote, for EU/US clients. Python, React, AWS/GCP. Available now, full-time, CET hours.
Java (Programming Language)Application Programming Interfaces (APIs)DevOpsDjangoPython (Programming Language)PostgreSQLMongoDBRedisNext.jsTypeScriptGoogle CloudReact.jsPrompt EngineeringSpring BootBackend
Senior Full-Stack Engineer, 10+ years. Backend-first in Python, with full ownership from database to browser to cloud. I have worked as developer, team lead and CTO, so I can join an existing team as a hands-on senior engineer or take a whole component from requirements to production on my own.
Backend & APIs (Python, FastAPI, Django)
REST APIs and backend services that other systems depend on: Python, FastAPI, Django, Django REST Framework, Pydantic, Celery, RabbitMQ, PostgreSQL, MongoDB, Redis. Built a customer-facing external API with versioned endpoints, JWT/OAuth2 auth, rate limiting and bulk CSV upload. Rewrote one hot path from 48s to 4.5s.
Integrations & Payments
Built an integration framework connecting 88+ external tools (Wiz, CrowdStrike, Tenable, Snyk, Jira, ServiceNow, GitHub, GitLab) behind one fetch, normalise, store contract, so a new partner is a config plus a normaliser. Payment, KYC and wallet integrations in production: Adyen, Stripe, Crossmint, Wirex, TerraPay.
Data Pipelines & Cloud (AWS, GCP)
Multi-tenant ingestion, normalisation and deduplication pipelines on AWS S3, Apache Iceberg, Athena, DuckDB and Parquet. Led a MongoDB to S3/Iceberg migration rolled out behind feature flags with no customer-visible downtime. AWS (ECS, S3, Athena, Bedrock, CDK), Google Cloud (GKE, Helm, KMS), Docker, Kubernetes, GitHub Actions, CI/CD. Shipped 138 releases across dev and prod.
Frontend & Mobile
React, Next.js, TypeScript, Node.js. Mobile via Kotlin Multiplatform. Java and Spring Boot on a 30-service telecom platform serving an app with 1.4M lifetime users.
LLM Features in Production
Classification and scoring pipelines on AWS Bedrock and the Claude API with structured output, batch inference and self-verification prompting.
Web Scraping & Automation
Scrapy and Selenium crawling pipeline monitoring thousands of URLs continuously, with 10+ priority-routed Celery queues.
Leadership
Hired and led teams of up to 6 engineers. CTO for a consumer telecom and fintech platform. Mentored 4 juniors into full-time engineers. Used to inherited codebases, remote teams and clients in the EU, US and Canada.
Working mode: remote, full-time, English C1. Same working hours as CET. B2B invoicing via own company.
Experience
Professional experience10+ years
Freelancer since2021
Languages
EnglishFluentRomanianNative speakerRussianNative speaker
Project history
Consumer telecom and travel eSIM platform with an in-app digital wallet (telecommunications, fintech). Stack: Java, Spring Boot, Kotlin Multiplatform, Next.js, Node.js, PostgreSQL, Redis, nginx, Adyen, Stripe, Crossmint, Wirex, TerraPay.
- Own architecture, cloud infrastructure and the engineering team for a platform of 30 services across 3 environments, serving an app with 1.4M lifetime users
- Led engineering for the in-app digital wallet built with Crossmint and Wirex on the Stellar network, launched inside the official mobile app
- Own the integration surface: card acquiring (Adyen, Stripe), cross-border payout (TerraPay), wallets and KYC (Crossmint), virtual cards (Wirex), eSIM provisioning
- Took the MVNO product live in production and cut a recurring multi-hour web outage to a 15-second self-heal by diagnosing a Node.js heap leak
Enterprise security data platform (SaaS, part of Armis). Stack: Python 3.13, FastAPI, Pydantic, Celery, MongoDB, Redis, AWS S3, Apache Iceberg, Athena, DuckDB, ECS, CDK, Bedrock.
- Built the integration framework connecting 88+ external tools (Wiz, CrowdStrike, Tenable, Snyk, Jira, ServiceNow, GitHub, GitLab) behind one fetch, normalise, store contract, so a new partner is a config plus a normaliser
- Designed the normalisation layer turning 80+ API response shapes into 24+ Pydantic entity types; rewrote one hot path from 48s to 4.5s
- Led the migration of the analytical store from MongoDB to S3/Iceberg with Athena, rolled out per integration behind feature flags with no customer-visible downtime
- Built the customer-facing external API: versioned endpoints, JWT auth, rate limiting, bulk CSV upload
- Designed an LLM classification framework on AWS Bedrock with batch inference and structured output
SEO analytics and backlink monitoring platform (SaaS, marketing technology). Stack: Python, Django 5, DRF, Celery, RabbitMQ, PostgreSQL, Scrapy, Selenium, Claude API, GKE, Helm, GitHub Actions, SOPS.
- Top contributor (about 275 of 724 commits); hired and led 6 engineers across 3 projects
- Built the crawling pipeline monitoring thousands of URLs continuously: Scrapy with Selenium fallback, 10+ priority-routed Celery queues, 3 production replicas
- Ran the platform on GKE with Helm charts per service and KMS-encrypted secrets; shipped 138 releases across dev and prod
- Designed the AI content scoring pipeline on the Claude API with a structured 0-100 rubric and self-verification prompting
- Shipped a versioned REST API: 20+ endpoints, 60 serializers, webhooks