Upstaff Developer Profile Directory

• Senior Full-Stack AI Engineer and AI Systems Architect with 10+ years of experience building scalable, high-performance platforms for leading banks across Dubai, the United States, and Europe, as well as taking AI-driven startup products from MVP to production.
• Combines architectural expertise in React, Next.js, TypeScript with a strong business vision, designing cost-optimized Hybrid AI architectures that bridge legacy systems with modern Agentic workflows.
• Leading teams, mentoring engineers, and delivering products from MVP to profitability. 

• 20 years of SRE expertise delivering scalable, containerized infrastructure and fault-tolerant systems across multiple countries
• Firecracker expert with high-level command of security isolation and network isolation. Architected and tuned microVM sandboxes that provide true kernel separation and tightly scoped networking, setting a high bar for safe execution of untrusted workloads.
• Founder of Pullrun (pullrun.dev), a 12MB Rust-native universal runtime unifying OCI image execution across containers, VMs, Kubernetes, and AI agents with native MCP AI orchestration
• Proficient in Rust, Go, Python, Kubernetes, Docker, Prometheus, Grafana, Terraform, and Ansible.

• AVP - Technology Lead with 12 years in IT and 8+ years of architecture and platform engineering experience across regulated financial services.
• GCP-based Kubernetes platforms, IAM and data-risk controls, and a Gemini/Vertex AI-powered RAG agent shipped for a live trading platform.
• Architecting secure AWS production environments: Firecracker MicroVMs, 40+ clusters with Terraform;
• Background spans AWS and GCP environments, IT governance frameworks, cybersecurity and risk reviews, and coordinating transformation and migration work across engineering, security, and compliance teams, SOC2 and ISO 27001.
• Multi-layered data infrastructures (PostgreSQL, ChromaDB/PGVector, and Neo4j) for AI agents

• AI / LLM Solutions Architect and Senior .NET Engineer with 10+ years : enterprise-grade AI-enabled platforms and regulatory systems.
• .NET 8, ASP.NET Core, Python/FastAPI, LangChain, OpenAI/Claude APIs, RAG, vector search, and AI integration architecture.
• Led end-to-end architecture and implementation of German e-invoicing solution with AI document processing and structured invoice workflows.
• Strong background in microservices, DDD, CQRS, event-driven architecture, Azure/AWS cloud, Kubernetes, CI/CD, and production observability.
• Computer Science education with proven skills in backend, frontend, DevOps, testing, and AI platform engineering across insurance, banking, and regulatory domains.

• 15+ years with business analysis and data engineering.
• Data engineer on Databricks + Delta Lake daily: PySpark, Spark SQL, medallion architecture, job tuning, and cost control. Strength is reverse-engineering undocumented legacy warehouses (incl. SAP BW concepts) and reproducing the logic as maintained models and pipelines, with source-to-target reconciliation as the acceptance gate.
• Migration: source cutovers, six-provider schema unification into one canonical model, historical backfills and restatements. Dimensional Gold-Silver-Bronze model and the semantic layer. AWS Flue, MS Fabrick, Power BI.
• Domains: Fintech, payments, AML and regulatory reporting; US retirement & wealth; BMW.

• Engineer with 6+ years in C#, .NET Core, and backend system design.
• Skilled in cloud platforms AWS, and Azure.
• CI/CD pipelines and DevOps for efficient project delivery. Expertise in optimizing PostgreSQL and MS SQL queries.
• Front-end frameworks: React and Angular (4-16).
• Worked in HealthCare, IoT, and Fintech areas, as well as enterprise and Startups.

• 11+ years in native iOS (Swift), Android (Kotlin), and cross-platform (.NET MAUI, Xamarin) mobile development.
• Expert in platform migration (Xamarin to .NET MAUI, PCL to .NET Standard) and performance optimization.
• Proficient in MVVM architecture, RESTful APIs, custom controls, and AI-assisted development tools.
• Collaborated with international teams, notably German engineering teams at Miele and IBM Romania
• Engineering diploma in Electrical Engineering, skilled in C#, C++, .NET technologies, and DevOps tools like Git and Azure DevOps.

• Technical Team Lead with 16+ years in .NET, MAUI, Xamarin, React, and VueJs, leading mobile and web projects.
• 20 mobile apps in production.
• .NET MAUI since 2022 (NET 6). Published a book about .NET MAUI.
• Expertise in CI/CD, ASP.NET Web API, MVVM, N-tier architecture, and cross-platform mobile development.
• Strong background in software engineering principles and best practices, driving high-quality code and team productivity.
• Fluent in Romanian, English, and Italian, with experience in international project collaboration.

• Technology leader, Solution Architect, hands-on builder, and founder with 25+ years of experience designing and building software products and platforms across Agentic AI, cloud, automation, and workflow orchestration, Agentic AI, LLM orchestration, workflow automation, SaaS, and cloud platforms.
• Hands-on Solution Architect, CTO, Founder, Principal Architect, and Developer specializing in Agentic AI, LLM orchestration, workflow orchestration, durable execution, cloud architecture, distributed systems, and product platforms.
• Worked at startups and enterprises (IBM, Automation Anywhere, Stanford University)

• AI product & transformation lead | 8+ yrs product ownership, BA, enterprise delivery & AI workflows. Driving AI products & adoption at Rivian and Volkswagen Group Technologies (discovery→pilot→rollout→optimization).
• Expertise: process mapping, AI use-case prioritization, trade-offs, measurable adoption.
• Hands-on: agents, prompting, RAG, tool-use, workflow automation, evaluation, low-code prototyping.

CORE SKILLS AI

• Transformation: process mapping, use-case prioritization
• Agentic AI & LLMs: agents, prompting, RAG, tool-use, rapid prototyping
• Product & Delivery: roadmaps, PRDs, stories, ACs, Agile/SAFe
• Eval & Adoption: quality, enablement
• Leadership: workshops, alignment, exec comms

• Over 6 years of experience with high-volume data platforms (PySpark, Databricks), and orchestrating pipelines with Apache Airflow and Azure Data Factory. AWS and Azure cloud services for ELT processes.
• Delivered consulting services for Banking (Santander), Retail (Mango, Zalando), Insurance (Reale Seguros), and Industry (Telefónica, Técnicas Reunidas) on Databricks Lakehouse adoption and data platform strategy.
• Strong background in ML model industrialization, ETL processes, and optimization of Spark configurations
• Hosted the first Databricks User Group Meetup in Madrid and attended the DAIS 2025 in San Francisco.

• Ranked among the Top 10 local freelance Python engineers at the age of 17.
• Contributed to projects with a multi-million user base, focusing on backend scalability and production stability.
• Successfully launched and supported a USA educational platform used by students, tutors, and academic institutions.
• Represented the development team at the international Wefi Beyond Banking Summit, presenting a fintech product to a global audience.
• Built and maintained production-grade backend systems, automation tools, Telegram bots, and API integrations for fintech, crypto, payments, and business operations.

• Senior FullStack Engineer with 6+ years of experience delivering scalable web applications in healthcare, eCommerce, marketplaces, and Web3 domains.
• Proficient in React.js, Next.js, TypeScript, Node.js, PostgreSQL, GraphQL, REST APIs, and Web3 integrations including Wagmi and Viem.
• 3+ years on blockchain/Web3 projects: Expertise in building complex features such as crypto payment platforms, NFT marketplaces, multi-chain token launchpads, and real-time healthcare scheduling systems.

• Data engineer with 18+ years in distributed systems and data-intensive platforms, now focused on cloud ETL/ELT (Extract-Transform-Load and Extract-Load-Transform) pipelines and lakehouse architecture.
• Recent work: rebuilding a legacy on-premise SQL/shell/Python pipeline estate as medallion-layered Databricks/Delta Lake pipelines for a global investment bank, and building AWS-native batch and streaming pipelines (EMR/Spark, S3, Lambda, Step Functions, Kinesis) for aglobal financial market-data provider.
• Strong SQL and relational database design; dimensional modelling and data warehousing; data quality, lineage and governance in strictly regulated environments. 
• EU-resident in Sofia.

• 15 years of experience in software and data engineering. Expertise in designing and implementing cloud-native data lakehouse solutions using Snowflake, Azure Databricks, and Apache Kafka with CDC and Lambda/Kappa architectures.
• Proficient in Go, Python, SQL, PL/SQL, ETL, dbt, Airflow, Debezium, and CI/CD pipelines with GitLab, enhancing data ingestion and transformation workflows. AWS and Azure cloud services.
• Led development of zero-downtime upgrade features for VMware vSphere, holding patents for innovative software-defined data center upgrade methods.
• Data consulting for Neoshare AG, DSK Bank, OpenTag EOOD, VMware, CODIX S.A and IBM.

• Over 15 years of expertise in designing and implementing ETL/ELT, high-availability databases and advanced BI solutions across cloud and on-premises platforms, including Snowflake, AWS, Azure, and SQL Server.
• Proficient in SQL (T-SQL, PL-SQL), Python (NumPy, Pandas), MDX, and ETL tools such as dbt, SSIS, and Azure Data Factory, with strong experience in data warehouse architecture and migration projects.
• Solid foundation in computer science with MSc in Microsoft Information Technologies and hands-on experience in Microsoft BI stack, cloud data engineering, and agile methodologies, including SCRUM and Azure DevOps.

• A full-stack Typescript engineer with experience in SAAS, Enterprise, Fintech, Healthcare, and Games, end-to-end ownership, and ability to work fast.
• Seeking a challenging Senior Software Engineer position to deliver exceptional value to users and drive positive impact in our world, and apply extensive background in software engineering:
  • 7 years with PostgreSQL, Node.js (Express, Koa, Fastify), Nuxt, and Storybook.
  • 6 years with Vue.js (lead v1/v2->v3 migrations, VueFire, and Storybook component libraries, Game engine) and React.
• AWS, Azure, Serverless architecture (Lambdas); Containerized infrastructure, testing, performance, and CI/CD.

• Senior Embedded C/C++ Engineer with 6+ years in embedded systems, IoT, and network protocol development
• Experience with embedded Linux, Linux kernel modules, and system-level architecture across Linux and STM32
• Develops software components and firmware in C/C++ and Python, including drivers, communication stacks, and control systems
• Skilled with TCP/IP, UDP, TLS, LWM2M, and real-time data pipelines; experience with low-latency video and telemetry systems
• Debugging and profiling skills (GDB, OpenOCD, Wireshark); works with cross-compilation, Yocto, and CI automation

• 15+ years of experience in web development
• Front-End: JavaScript & TypeScript (React, Angular, Vue.js).
• Mobile: React Native.
• Back-End: Java (Spring Boot, JavaCV + FFmpeg for media processing), Node.js, Next.js, TypeScript, PHP.
• AWS Cloud infrastructure, Lambda/Serverless, SNS/SQS.
• Unit testing, integration testing, testing automation frameworks and tools
• M.Sc in Software Engineering, GAI, LLMs.
• Experience leading and mentoring a team of developers, including assigning tasks, providing guidance, and ensuring the team's success. Conducting assessments and interviews. Ability to motivate and train team members, resolve conflicts, and providing constructive feedback.

• Software engineer with 6+ years in backend/fullstack development (Node.js, TypeScript, microservices), specializing in serverless architectures
• Domain expertise in Travel/Vacations and Payment/Banking systems, currently working at Guesty (data distribution channel management, Booking integrations, payment APIs)
• Built scalable distributed systems with AWS Lambda, Kubernetes, MongoDB, Kafka/RabbitMQ; aware of serverless limitations (compliance, DB coupling, cost)
• Experience with Java, Rust, Solidity; delivered MVPs quickly (Next.js, MongoDB) and onboarded clients efficiently

• Full-Stack Developer with experience in Node.js, Nest.js, and Spring; React (pet projects with Vue).
• Backend expertise in microservices, MongoDB, PostgreSQL, and secure API design (OAuth, JWT, Webhooks). Experience with AWS, Azure, CI/CD, Docker.
• Domain experience: Fintech (SAAS Fintech/BI platform), and Healthcare (DUBAI, Event Management)
• Based in Tel Aviv, an Israeli citizen, open to on-site and hybrid work.

• Software Engineer with 9+ years of expertise in Java, Kotlin, and Spring Boot; DevOps and SRE, and Team Lead roles.
• 4 years with FHIR integrations (US Healthcare project until UA office lay-offs in 2022)
• Proficient in CI/CD pipelines, infrastructure as code (Terraform, Ansible), and monitoring tools (Prometheus, Grafana) with hands-on DevOps experience on OpenStack and cloud platforms.
• DB (MariaDB, MSSQL, MongoDB), messaging systems (RabbitMQ, ActiveMQ, Azure Service Bus), and integration with Shopify and FHIR standards.
• Holds a B.Sc. in Software Engineering

• DevOps Engineer with 5+ years of expertise in automating Azure and hybrid cloud infrastructures using Terraform, Terragrunt, and Azure DevOps.
• Proficient in Kubernetes (AKS), containerization (Docker), and scripting with PowerShell, Bash, Python, and Go to enhance deployment automation and operational efficiency.
• Experienced in managing identity and access with Entra ID, hybrid AD, and securing cloud environments using Defender for Cloud, Sentinel, and CrowdStrike.
• Skilled in building and maintaining CI/CD pipelines with Azure DevOps, GitHub Actions, and GitLab CI, supporting scalable and reliable application delivery.
• Location: Poland, EU timezone

• Full-stack engineer with 8+ years of experience specializing in JavaScript and TypeScript. Strong Computer Science background and a proactive, collaborative team player.
• Expertise in building complex cross-platform applications using React.js, React Native, Angular, Node.js (Nest.js, Express), and Java (JVM ecosystem, Gradle, REST APIs, Android tooling, API integrations).
• Developed AI-powered chatbots with Whisper & HeyGen, real-time messaging platforms, and serverless solutions using AWS Lambda, API Gateway, Cognito, and MongoDB (Mongoose).
• Skilled in Redux Toolkit, RxJS, responsive UI development, accessibility, performance optimization, refactoring, and CI/CD with Serverless Framework.

• Senior Full-Stack engineer with 6+ years of expertise in SAAS, finance, e-learning, gambling, and e-commerce domains.
• Strong in Node.js, TypeScript, Next.js, React, React Native; builds scalable architectures, real-time features (Firebase), and REST/GraphQL APIs.
• Hands-on with CI/CD, Docker, AWS/Vercel, and state management (Redux, Zustand, Vuex).
• Master's in Computer Science from Lviv Polytechnic National University (Ukraine); applies clean code and modular design.
• Skilled in cross-team collaboration, Jest test coverage, and responsive UI with Material UI, Tailwind, and CSS preprocessors.

• Senior JavaScript Engineer with 8+ years of experience; MS in Computer Science and Software Engineering.
• Node.js, TypeScript, PostgreSQL, and AWS; High-load projects with JS/TypeScript, Java, QT, and C++.
• AWS serverless, Lambda functions (migration architectures, reduced infrastructure costs by 40%, microservices that handle 10K+ concurrent requests with latency less than 200ms); Experience migrating monolithic systems to serverless and microservice architectures, optimizing performance and reducing infrastructure costs (~40%);
• Skilled in SDLC practices, including Agile/Scrum, CI/CD pipelines with GitHub Actions and Docker, and pre-test development using Jest and Playwright;

• 6+ years managing IT infrastructure across Azure, AWS, and GCP, with hands-on expertise in Microsoft Intune for Windows, macOS, and Linux environments.
• Strong background in hybrid identity (Active Directory + Microsoft Entra ID), including user lifecycle management, RBAC, OU design, and GPO administration. Experienced in building secure Entra ID environments with PIM, Conditional Access, and Identity Protection for 300+ users.
• Contributed to AD to Azure AD migrations, ensuring secure identity transformation. Skilled in security automation, endpoint protection, and PowerShell/Graph API scripting.

• 7 years of commercial experience with JavaScript, ECMAScript 6. Experience with responsive layout, web sites, mini applications in JS and SPA in Vue.js.
• 5 years with Vue.js framework (including Vue 3 core principles, Style Guide, Composition API, official documentation of the framework).
• Interacting with API endpoints and other web services.
• SOLID, DRY; UI Kit & Bootstrap, Unit tests (Cypress)
• Projects with WordPress
• Intermediary English

• Computer Engineering degree with a background in software architecture, algorithm design, efficiency analysis, and data organization techniques.
• Interest in low- and high-level programming languages like Zig, Rust, Dart, C. Additional knowledge of Python, Ruby, Go, and PHP.
• Strong experience with code testing (Qase.io) and cloud Terraform Automation and Collaboration (Scalr.com) platforms.
• Over 10 years of full-stack web development experience with expertise in TypeScript, Node.js, and PostgreSQL. React, Vue.js, and Angular for front-end tasks.

• Full-stack web developer with more than 10 years of commercial experience.
• Built event-driven integrations using MS stack (APIM + Functions, Logic Apps + Functions) to substitute existing flows written with MuleSoft. 3 years with Azure Logic Apps and Functions; Service Bus, Azure Event Grid, Azure API Management. Was creating event handling and data transformation flows using Azure Logic Apps.
• Has worked on a wide range of projects, including financial remittance systems, medical appointment websites, and payment systems for electronic document exchange services.
• Has experience working with a range of technologies including ASP.NET Core, .NET Core, EF Core, TypeScript, Node.js, Microservices, Kafka, Azure, AWS, Angular, React, Vue.js, and WPF.
• Strong bug-fixing skills and experience with DevOps responsibilities.

• Over 10 years of expertise in full-stack .NET development, specializing in C#, ASP.NET Core, Entity Framework, and MS SQL Server across diverse domains, including FinTech, e-commerce, and SaaS.
• Proficient in Azure integration services: Logic Apps, Azure Functions, Service Bus, Event Grid, API Management. Frequently used Logic Apps + API Management + Functions (especially in migrations) for API exposure, workflows, and custom logic.
• Strong background in migrations & integrations (MuleSoft experience and similar). Skilled in API-led, event-driven, and hybrid patterns — connecting internal systems, third-party services, and cloud components (multi-system flows, async processing, background jobs, notifications, legacy modernization to Azure).
• Strong background in implementing billing systems, real-time event-driven architectures, and multi-tenant SaaS platforms with robust role-based access control and audit capabilities.
• Experienced in frontend technologies, including Blazor, AngularJS, TypeScript, and React
• Skilled in applying SOLID principles, design patterns, CI/CD pipelines, unit and API testing (XUnit), and Agile methodologies to ensure maintainable, high-quality software solutions.

• Software engineer with 20+ years of experience specializing in Node.js (TypeScript) and Python, architecting microservices and event-driven systems using Kafka/Redpanda, ClickHouse, and PostgreSQL.
• Official Oracle Contributor, Active community events/meetups organizer, and open source projects contributor
• Proficient in designing scalable APIs with gRPC, tRPC, and Protobuf, implementing CI/CD pipelines with GitLab CI/GitHub Actions, Docker, and Terraform.
• Holds a Bachelor’s degree in Automation and Computer Technologies. Strong background in system design, cloud-native architectures, and observability practices, including structured logging, metrics, and tracing.