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I build cloud infrastructure that you can leave alone. Predictable, reproducible, auditable. Not held together with manual ClickOps and dread. Most teams I work with come to me when one of three things is happening. The AWS bill keeps climbing every month and nobody can explain why. I cut waste on real client workloads by moving idle EC2 to scheduled start and stop, replacing NAT Gateways with VPC endpoints (saves around $35 per month per environment, before traffic), right sizing instances, and surfacing waste with proper tagging and Cost Explorer dashboards. Production was set up in the console two years ago and now nobody dares touch it. I migrate ClickOps environments into Terraform without breaking running services. Module based, workspace driven, with state in S3 and DynamoDB locking. The handover is a repo your team can read, not a black box only I understand. The infrastructure works but it is exposed in places it should not be. I have moved public ALBs to private origins behind CloudFront and WAF, replaced shared IAM users with role based access, locked down security groups, and put secrets in Secrets Manager instead of environment files. Boring, careful work. The kind that prevents the 3 AM call. What I work with daily: - AWS — ECS Fargate, RDS, Aurora, S3, CloudFront, Route 53, Cognito, Secrets Manager, SQS, Lambda, EC2, VPC, IAM, WAF, CloudWatch - Terraform — custom modules, workspace structure, multi account setups, S3 and DynamoDB state - CI/CD — GitHub Actions, GitLab CI, automated database migrations, container scanning - Python — FastAPI services, Celery workers, automation scripts, infrastructure tooling - Security — Cognito with JWT auth, VPC design without NAT, IAM least privilege, audit logging - Containers — Docker, ECS Fargate (Spot and on demand), private ECR Recent work: - Built a battery storage SaaS platform on AWS. FastAPI plus Celery, dual queue ECS Fargate workers (Spot for short jobs, on demand for long ones), Cognito auth, full Terraform from scratch. - Architected a private ML training platform on OVH. GPU workers, Celery, Tailscale private networking, S3 compatible object storage. - Self hosted infrastructure deployment on a Swiss vServer. Docker stack with Keycloak SSO, Traefik with Let's Encrypt, GitLab CI/CD. - Migrated multiple client workloads from public ALBs to private origins behind CloudFront and WAF. - Built scheduled EC2 start and stop automation for a workflow stack to cut idle compute cost. How I work: - Everything goes in Terraform. If it is not in code, it does not exist. - I write things down. Runbooks, decision logs, architecture diagrams. The next person on the project should not need to call me. - I would rather flag a risk early than discover it during a deploy. - If I think the scope is wrong or the approach will not hold up, I will say so. You are paying for judgment, not just hands. Background includes 9 AWS certifications across architect, security, networking, and devops tracks, plus internships at Deutsche Bank and ING Hubs on the Java backend side, and ongoing freelance work across AWS infrastructure, security migrations, and platform engineering. If you are trying to clean up production, get out of ClickOps, cut your AWS bill, or build a new platform from scratch, happy to talk. If your project is more "throw a script together fast and do not worry about it later," I am probably not the right fit.

👋 Hello and welcome! Andrei Petrascu here - Java Backend Developer - Full Stack Developer - Computer Science Engineer - Software Engineer . 🌾 Over 5 years of experience. 💡 Building scalable, cloud-ready web applications for individuals, startups and companies . . 🚀 I Can Help You With - Backend Development with Java 17/21, Spring Boot, Spring Security, JPA, Hibernate, Quarkus - API Design & Integration (REST, SOAP, Binance API, custom APIs) - Database Management — PostgreSQL, MySQL, Liquibase, JPA, Hibernate - Frontend Development with React, Next.js, TailwindCSS, TypeScript - Cloud Deployment — AWS (aws s3 buckets), Vercel, Render, Heroku - Unit Testing — JUnit, Mockito, JaCoCo, - Full Stack Development: web apps development, web applications, integration with 3rd-party APIs (Payments, Trading, AI tools) . . 🤝 Let’s Build Something Great I’m detail-oriented, proactive, and passionate about building reliable, maintainable systems. Let’s discuss your idea — I’ll help you turn it into a high-quality, working product. . . 🌍 Projects auronity.ai — Java backend for AI chat & analytics platform; java backend developer, API integration, spring security, user management, chat management, ai integration, liquibase, postgres, swagger, etc. . agrocentru.ro — Online marketplace connecting buyers and sellers (Java, Spring Boot, Postgres, Liquibase, React, Tailwind, Next.js, AWS, AWS S3 buckets, Vercel, Render). . BMW — Worked at BMW TechWorks Romania using Java, Quarkus, Azure Services, Terraform, IaC, SonarQube, CI/CD, ArgoCD, PostgreSQL, Kafka, Docker, Git, OIDC, and more; Java backend development for enterprise applications. . LMX (UK) (now Connectbase USA) — Java Backend developer. Developed and integrated SOAP and REST APIs for a global telecommunications access platform. . Binance Trading Bots — Startup. Automated trading systems for crypto markets. I implemented crypto trading bots using Binance API, API Integration, Automated Trading Bots for Binance. Binance Spot, Binance Futures . Zub — Dental web app with automated image detection (disease detection and treatment recommendations from X-ray images using AI), patient management. . . 🧠 Tech Stack • Java 17, 21 • Spring Boot Framework • Frontend: React, Tailwind, Next.js • AWS, S3 buckets, vercel, render • Web Services: SOAP, REST • Agile Methodology (Scrum, Jira, Confluence) • Git (GitHub, GitLab, Bitbucket) • Unit Testing: JUnit, Mockito • Debugging • JPA, Hibernate • MySQL, PostgreSQL • Data Structures and Algorithms • Heroku • Binance API, API Integration, Automated Trading Bots for Binance . . . #Full Stack: Java, Java 17, Java 21, Java Developer, Java Backend Developer, Java Spring Boot, Spring Boot, Spring Framework, Spring Boot Developer, Spring Security, Spring Data JPA, Spring MVC, Backend Development, Backend Developer, Full Stack Developer, Full Stack Development, Software Engineer, Software Development, Computer Science, Web Development, Web Developer, API Development, API Integration, REST API, RESTful API, SOAP API, Microservices, Microservices Architecture, PostgreSQL, MySQL, Database Design, Database Management, SQL, Hibernate, JPA, Liquibase, Database Migration, React, React Developer, Next.js, Next.js Developer, Frontend Development, JavaScript, TypeScript, Tailwind CSS, TailwindCSS, Responsive Web Design, Cloud Computing, AWS, Amazon Web Services, AWS S3, Cloud Deployment, Vercel, Render, Heroku, Cloud Architecture, Quarkus, Azure, Azure Services, Docker, Containerization, Terraform, Infrastructure as Code, CI/CD, Continuous Integration, Continuous Deployment, ArgoCD, SonarQube, Git, GitHub, GitLab, Bitbucket, Version Control, Unit Testing, JUnit, Mockito, Test-Driven Development, TDD, Integration Testing, JaCoCo, Code Coverage, Agile Development, Scrum, Agile Methodology, Jira, Confluence, Project Management, Binance API, Trading Bot, Automated Trading, Cryptocurrency, Crypto Trading, Binance Spot, Binance Futures, API Integration Specialist, Third-Party API Integration, Payment Gateway Integration, AI Integration, Machine Learning Integration, Authentication, OAuth, OIDC, User Management, Security, Data Structures, Algorithms, Problem Solving, OOP, Object-Oriented Programming, Design Patterns, Enterprise Applications, Scalable Applications, Web Applications, SaaS Development, Startup Development, E-commerce, Marketplace Development, Healthcare Software, Fintech, Trading Platform, Kafka, Message Queue, Event-Driven Architecture, Maven, Gradle, Swagger, API Documentation, Code Quality, Clean Code, Debugging, Performance Optimization, Telecommunications, Enterprise Software, B2B Applications, Custom Software Development, Software Architecture, System Design, Backend Architecture, Server-Side Development, Java EE, Jakarta EE, JSON, XML, HTTPS, Web Security, Data Privacy, GDPR Compliance, Remote Work, Freelance Developer, Contract Developer, Long-term Projects, Short-term Projects.

Platform & DevOps engineer with 10+ years building infrastructure that ships faster, costs less, and stays up. I help startups and scale-ups across fintech, e-commerce, and SaaS design and operate cloud-native platforms on AWS and GCP. My work spans the full stack of modern infrastructure: Kubernetes cluster design and hardening, GitOps pipelines with GitHub Actions and ArgoCD, Terraform modules for repeatable multi-environment deployments, and observability stacks using Prometheus, Grafana, Datadog, and ELK. Beyond standard DevOps, I bring AI-Ops capabilities that give teams a real edge. I deploy and manage self-hosted large language models using Ollama and Open-WebUI, keeping sensitive data on-premises and fully GDPR-compliant. I build intelligent automation workflows with n8n that replace manual handoffs with event-driven pipelines — from infrastructure events to automated actions without human intervention. Security is built in, not bolted on. I implement DevSecOps controls including WAF, AWS GuardDuty, IAM least-privilege, secrets management, and compliance automation. This matters especially for European clients operating under GDPR. Currently at Thoughtworks as an Infrastructure Consultant, I partner with engineering teams to define platform strategy, reduce cloud costs, and accelerate delivery cycles. 100% Job Success across 19 contracts. Top Rated on Upwork. If you need someone to architect your cloud platform, migrate workloads, build production-grade CI/CD, or introduce AI-powered automation into your workflows — let's connect.

I am a dedicated DevOps Engineer with 10 yoe in the IT industry, with 3 yoe fully hands on DevOps. Proficiencies: CI/CD: Jenkins, Gitlab, ArgoCD Automation: Bash / Go / Python Infrastructure as Code (IaC): Cloudformation, Ansible Cloud Proficiency: AWS, Azure, Openstack Containerization & Orchestration: Docker, Kubernetes, Helm Monitoring: Prometheus, InfluxDB, Zabbix, Grafana

✅ Formerly employed by: IBM, Ericsson, MetroAG, Upwork ► Linux, Unix: +19 years. ► AWS: +10 Years. ► DevOps: +9 years . ► SRE: +7 Years. ► Upwork Talent Cloud Member I love Vim/TMUX and split keyboards. Currently I can only accommodate long-term projects. For European clients VAT Reverse Charge may apply. Thank you very much for reading my profile. I'm looking forward to meeting you! Aldo

Currently an Upwork Expert-Vetted, working as a DevOps Engineer and DevOps Team lead for a company with more than 2.5 million of requests on production web servers and ~16 million requests on static S3 files through CDN each day. - Migrated AWS instances from FreeBSD to Ubuntu 18.04 with zero downtime. - Improved performance of production environments by over 100% by migrating to Ubuntu and by deploying a new stack using AWS Cloudfront in front of our new AWS ALB. - Maintained the CDN infrastructure and global monitoring infrastructure. - Responded to and diagnosed root cause for outages as Incident Manager. - Worked closely with the Development team to build the monitoring and alerting strategy. - Maintained a Gitlab Enterprise instance for internal code. - Extensive experience with AWS EC2, ELB, Cloudfront, VPC, IAM and other AWS technologies. - Since June 2019, responsible for a team of 3, technology strategy and day-to-day operations.