Andrei Tara, Developer in Bucharest, Romania
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Andrei Tara

Bio

Andrei holds a PhD in AI and Federated Learning and has 15+ years of experience building enterprise applications used by global companies such as Siemens, Volkswagen, AVL, and NXP. He specializes in designing flexible, scalable architectures across stacks. As the founder of TransylvaniaLabs, he delivers intelligent solutions that create measurable business value. He also contributed to building federated learning Protocol, applying decentralized, privacy-preserving AI in real-world environments.

Portfolio

Transylvania Labs
Amazon Web Services (AWS), WordPress, Android, Swift 3, iOS, Java, Angular...
DATADVISE LLC
Technical Leadership, LangChain, Data Pipelines...
Feedback 5280
Python, Data Scraping, Web Scraping, PostgreSQL, OpenAI API, CI/CD Pipelines...

Experience

  • JavaScript - 15 years
  • Java - 10 years
  • PHP - 6 years
  • Java EE (Jakarta EE) - 5 years
  • Laravel 5 - 3 years
  • Blockchain - 1 year
  • Blockchain Platforms - 1 year

Preferred Environment

Agentic AI, Python, Java, Springbot, Angular, Large Language Models (LLMs), PyTorch

The most amazing...

...thing I've built is an AI orchestration layer that composes multiple models using chain-of-thought and advanced reasoning for solid results at scale.

Work Experience

CTO

2015 - PRESENT
Transylvania Labs
  • Created a web-based B2B portal used by companies across Germany to trade goods and services on high-volume sales.
  • Implemented a web-based micro-financing platform and Android app used to provide better loans for everyday people in Indonesia.
  • Created an iOS application used to track user data consumption and propose better plans for their phones.
  • Developed a WordPress platform used by users in Australia to find the best phone plans.
  • Created an AI conversational chatbot for retail, used to help users find the best-fitting products.
  • Built a web-based platform that allows users to create and share their unique traveling experiences and visited objectives.
  • Created an iOS school attendance application used by parents and teachers in the US.
Technologies: Amazon Web Services (AWS), WordPress, Android, Swift 3, iOS, Java, Angular, Node.js, Laravel, Agentic AI, LangChain, n8n, AI Agents, eCommerce, Full-stack, OpenAI, Spring Security, Docker, REST APIs, Spring Boot, Enterprise Java Beans (EJB) 3, TypeScript, Architecture, Ionic, Machine Learning

CTO

2025 - 2026
DATADVISE LLC
  • Defined the end-to-end architecture and data model for aggregating macroeconomic, demographic, and alternative datasets across emerging markets; established normalization, metadata/provenance, and quality gates to support trustworthy insights.
  • Built the MVP ingestion and insights foundation: connector pipeline (scheduled pulls, parsing, validation), unified storage/indexing, and an AI-assisted analysis layer that turns raw data into decision-ready briefs, alerts, and summaries.
  • Led iterative delivery from zero to MVP, running architecture reviews, translating business requirements into a prioritized backlog, and mentoring engineers while setting up SaaS essentials.
Technologies: Technical Leadership, LangChain, Data Pipelines, Retrieval-augmented Generation (RAG), CTO, Marketing Analytics, Agentic AI, Data Analysis, Data Analytics, AI Chatbots, Chatbots, Time Series

Senior Data Platform Engineering Lead — Denver Artists Portal (MusicTech)

2025 - 2025
Feedback 5280
  • Scraped and normalized event data from an initial Denver venue site, creating a continuously updated table of past and upcoming shows in PostgreSQL to power the MVP website.
  • Built an artist database with unique IDs and event associations; implemented cleaning rules and fuzzy matching to remove irrelevant entries and prevent duplicate artist records.
  • Integrated OpenAI API enrichment into the pipeline, adding bios/genres/links for artists and exposing structured datasets/views to the site for gig discovery and peer analytics.
  • Designed idempotent PostgreSQL ingest (staging and COPY upsert ON CONFLICT) with composite indexes; published materialized views for events/KPIs.
Technologies: Python, Data Scraping, Web Scraping, PostgreSQL, OpenAI API, CI/CD Pipelines, Playwright, Redis, FastAPI, Artificial Intelligence (AI), ChatGPT API

AI Automation Engineer

2025 - 2025
Octa
  • Designed and implemented AI-driven agents that automated the full invoicing lifecycle, from data extraction and validation to invoice generation and reconciliation.
  • Developed a scalable automation framework using Python, LangChain, and Temporal, enabling seamless orchestration of finance operations.
  • Evaluated and optimized workflow automation tools to identify the most efficient setup for finance workflows.
Technologies: Python, Large Language Models (LLMs), AI Agents, Agentic AI, n8n, OpenAI, LangChain, Machine Learning, Artificial Intelligence (AI), ChatGPT API

Enterprise Automation Engineer — BPMN & RPA

2019 - 2022
WebINTENSIVE Software, LLC
  • Designed and delivered a multi-tenant business management SaaS with role-based access, SSO (OIDC/SAML), audit trails, and tenant isolation; built admin and usage metering to support secure, scalable operations.
  • Built a low/no-code workflow automation engine: drag-and-drop designer, BPMN-style orchestration, human/robot tasks, SLA timers, conditional branching, and versioned deployments over an event-driven queue.
  • Implemented RPA: standardized templates and versioning, centralized orchestration/scheduling, queue-based work allocation, robust exception handling with human-in-the-loop, secrets vaulting, and KPIs dashboards for transparency and control.
Technologies: Java, SQL, Spring, Angular, Jakarta EE (Java EE or J2EE), Springbot, Spring MVC, Spring Data JPA, Spring Security, Docker, REST APIs, Spring Boot, Enterprise Java Beans (EJB) 3, Java EE (Jakarta EE), API Gateways, PostgreSQL, TypeScript, Node.js, Robotic Process Automation (RPA)

Back-end Platform Engineer — Recipe Management (Foodtech)

2018 - 2019
Paragon Creations, Ltd. (via Toptal)
  • Built an enterprise recipe platform that centralizes formulations, approvals, and production specifications. It adds draft, review, approval flows, versioning, audit trails, and rollbacks to meet traceability and compliance needs (e.g., HACCP, allergens).
  • Designed REST APIs for recipes, ingredients, costs, allergens, and change history. Documented with OpenAPI, secured with RBAC and tokens, and instrumented for observability. Added validation, rate limits, and CI/CD for low-latency scale.
  • Tuned large relational databases with indexing, partitioning, and caching to cut heavy queries from seconds to milliseconds. Built ETL to ingest supplier data and sync BOMs with ERP/MES. Enabled backups, replication, and alerts for high availability.
Technologies: Angular, JPA, Microsoft SQL Server, Hibernate, Quartz, Spring Boot, Spring MVC, Java, SQL, Spring, Spring Data JPA, Spring Security, Docker, REST APIs, Enterprise Java Beans (EJB) 3, PostgreSQL

Senior Software Engineer — Secure Messaging (Govtech)

2018 - 2018
Government Connect (via Toptal)
  • Built a secure chat app for a U.S. government use case with MFA login, roles, audit logs, and strong encryption. Deployed in a hardened, isolated environment with full monitoring.
  • Added peer-to-peer end-to-end encryption: modern key exchange, session ratcheting, forward secrecy, message authentication, key rotation, and secure on-device storage. Servers never see plaintext.
  • Built the back end on Firebase using Auth, Firestore, Cloud Functions, and Cloud Messaging. Wrote security rules, enabled offline sync, set up CI/CD, monitoring, alerts, autoscaling, and cost controls.
Technologies: Firebase, Spring Boot, Ionic 3, Angular, JavaScript, Ionic, REST APIs, Node.js, TypeScript

eCommerce Solutions Architect (PHP/LAMP)

2017 - 2018
TeePublic (via Toptal)
  • Customized an e-store solution in PHP/MySQL: built modules/themes, tailored catalog/search, checkout, and admin workflows; added payment/shipping integrations and multilingual support while keeping core updates clean and maintainable.
  • Optimized performance end-to-end: profiled PHP, refactored hot paths, tuned MySQL schemas and indexes, added Redis/OPcache, async jobs, and CDN caching; ran load tests and fixed bottlenecks for faster page loads.
  • Containerized the stack using Docker, writing lean Dockerfiles and Docker Compose files for development parity. Developed CI/CD pipelines to build, test, and push images, enhancing reproducibility and rollback safety.
  • Deployed on AWS: ECS/Fargate (or EC2) for app, RDS for MySQL, S3 and CloudFront for assets, ALB and Auto Scaling, CloudWatch logs/alarms; set up backups, IAM least-privilege, WAF, and parameterized secrets.
Technologies: Amazon Web Services (AWS), Docker, SSL, MongoDB, MySQL, LAMP, PHP, Laravel

Protocol Architect — Layer1 Blockchain

2017 - 2018
Elrond Network
  • Led protocol R&D for adaptive state sharding, designing state/transaction/network sharding, dynamic shard resizing, validator sampling/reshuffling, and secure cross-shard messaging. Analyzed liveness and safety to support a high-throughput architecture.
  • Implemented a secure proof-of-stake mechanism featuring VRF-based leader selection, BLS aggregate signatures, fast finality, and fork choice, along with slashing and staking economics. Hardened the system against long-range attacks, nothing-at-stake issues, and Sybil attacks.
  • Delivered production-grade core and tooling by optimizing P2P gossip, mempool, and execution pipelining; added snapshots/checkpoints and parallelism; built testnets/benchmarks, telemetry/alerting, CI/CD, and operational runbooks to scale throughput.
Technologies: Sharding, Adaptive, Blockchain, JavaScript, Java, REST APIs, Cryptography

Enterprise Applications Engineer — Supply Chain

2012 - 2017
Paradine Development
  • Built a robust supply-chain management platform with Java EE on JBoss, backed by IBM DB2. Designed modular services and predictable deployments to support planning, procurement, logistics, and analytics across regions and many business units globally.
  • Owned the back end with SEAM, Hibernate, and EJB, crafting transactional services, JPA mappings, and batch jobs. Tuned connection pools, caching, and lazy loading; hardened security; added messaging, auditing, and test coverage for reliable releases.
  • Delivered a JSF-based front end using HTML, CSS, XML, and JavaScript. Built reusable components, forms, and dashboards with Ajax interactions, validation, and internationalization; ensured responsive layouts, accessibility, and cross-browser support.
  • Implemented complex business processes over large datasets: rules engines, validation pipelines, and scheduled ETL. Modeled master data with ECLASS; integrated with SAP; optimized DB2 queries and stored procedures for speed and scale at Paradine 24/7.
Technologies: JavaScript, Enterprise Java Beans (EJB), Hibernate, Java EE (Jakarta EE), Spring Data JPA, Spring Security, Enterprise Java Beans (EJB) 3, JBoss Seam

Social Web Applications Developer

2011 - 2012
Mayabo
  • Developed social applications (like Facebook and Twitter) using PHP and MySQL.
  • Developed, migrated, and deployed web applications on Amazon AWS cloud infrastructure.
  • Handled front-end development using HTML, CSS, XML, and JavaScript.
  • Handled back-end development using Kohana and Zend.
  • Developed a Magento extension.
Technologies: Kohana, Zend Framework, JavaScript, PHP

Business Application Developer

2010 - 2011
Sotec
  • Developed Java and Python web applications under the Google App Engine platform.
  • Developed C# ASP.NET web applications under the Microsoft Windows Azure cloud.
  • Created front-end solutions using HTML, CSS, XML, and JavaScript.
Technologies: JavaScript, ASP.NET, C#, Python, Java

Experience

DIY4U — Collaborative Production Engineering Platform

DIY4U is an EU H2020 project (GA 870148) that digitalizes the formulation, production, and supply of particulate & liquid FMCG via an Open Innovation platform and digitally enabled micro-factories (“fablabs”). It enables decentralized, customer-centric design and compliant small-batch production, accelerating innovation from idea to local manufacturing. The consortium spans six industry partners and seven research groups across seven EU countries, including SINTEF (coordinator), Procter & Gamble (P&G) (industrial anchor), and the Centre for Process Innovation (CPI) (technical lead).

Trading Studio — Algorithmic Trading Solution

Trading studio designed to test, simulate, and automate algorithmic trading strategies across multiple exchanges using the CCXT framework. The platform unifies three trading modes: backtesting on historical market data, paper trading with virtual funds under live market conditions, and automated live trading through secure connections to user exchange accounts.

The system includes a library of indicator-based strategies (RSI, EMA/DEMA, MACD, Bollinger Bands, Williams %R, Stochastic Oscillator, etc.) with fully configurable parameters and risk settings for detailed optimization and performance tuning. A dedicated pattern-analysis module supports detection and evaluation of common price-action and candlestick patterns, as well as strategy logic driven by order-flow behavior.

UPSIM — Industrial-grade Simulation

https://itea4.org/index.php/project/upsim.html
UPSIM is an ITEA 3 (Call 6) project that makes simulation trustworthy, repeatable, and shareable for credible digital twins—supporting design exploration, virtual testing, and predictive maintenance. With secure collaboration and end-to-end traceability across tools and partners, it turns simulation into a strategic asset that improves quality, speeds time-to-market, and reduces cost. The project sits under Smart Engineering, uniting 31 partners across six countries, led by Virtual Vehicle Research GmbH with major players like Audi, Volkswagen, Bosch, Infineon, DLR, and Philips.

Eptos

A framework of software modules to set up product master data repositories. Product master data repositories are used for the development, maintenance, and publication of organization-wide multilingual and cross-system product master data.

Its main responsibility is modeling items according to the ISO29002, ontoML, and eCl@ss connected to external systems (SAP, TeamCenter, etc.).

Tech stack: Java EE, Hibernate, Seam, JBoss, WebSphere, JSF, Richfaces, Oracle, DB2, SOAP, REST, JAXB, Ant, JBoss cluster, Infinispan

BigCart Hub

An enterprise eCommerce platform for Continental subdivisions to create and manage a common shopping cart for industrial procurement, centralizing approved vendor catalogs and contract pricing while enabling shared carts with role-based permissions, configurable approval workflows (cost thresholds, cost centers, multi-level sign-off), and full audit trails.

WhatBot — Tell It What to Buy

A Facebook Messenger bot that helps users find, compare, and purchase products directly in chat. The system combines an LLM for natural, multi-turn dialogue with specialized agents for intent detection, product search/recommendation, cart/checkout, and order tracking. It syncs the WordPress product catalog, supports rich replies (cards, carousels, quick actions), and hands off to a human when needed. Analytics and guardrails ensure relevant recommendations and safe responses.

Data Mining Rresearch Tool

A research tool used to study the network topology, user perception, and user feelings about a social media event.

Tech stack: Python, CouchDB, NLTK, and NetworkX

Whooparoo

A social media sales accelerator platform that allows integration with eCommerce platforms (Magento and osCommerce) as well as monitoring and optimizing of the sale funnel.

Tech stack: PHP, Kohana, Facebook API, Twitter API, Magento, MySQL, Amazon AWS, Ubuntu

What Phone

A startup founded in 2012 meant to offer the best solutions for telephony subscriptions for users in Australia and the UK. It allows the user to make an informed decision assisted by an intelligent algorithm.

Tech stack: PHP, WordPress, MySQL, Amazon AWS, Ubuntu, Google Analytics API

1locate

A mobile application seeking to connect users with nearby deals on restaurants and pubs.

Tech stack: JavaScript, Sencha Touch

maCouples

A social game where users can create tops of friends couples.

Tech stack: PHP, Kohana, MySQL, JavaScript, jQuery

Another Eight

A London-based fashion eCommerce solution.

Tech stack: PHP, Magento, HTML/CSS, MySQL, Amazon AWS, Ubuntu

Amahi Sync

A mobile application used to manage files on the Amahi private cloud platform.

Teach stack: Ruby, Ruby on Rails, JavasScript, Sencha Touch 2.0, Fedora

Education

2018 - 2024

PhD in Artificial Intelligence

Lucian Blaga University - Sibiu, Romania

2010 - 2012

Master's Degree in Decentralized Systems & Cryptography

Lucian Blaga University - Sibiu, Romania

2006 - 2010

Bachelor's Degree in Computer Science

Lucian Blaga University - Sibiu, Romania

Skills

Libraries/APIs

Node.js, jQuery, REST APIs, Quartz, React, PyTorch, Keras, Facebook SDK, OpenAI API, Playwright

Tools

Eclipse IDE, n8n, PhpStorm, Visual Studio, Git, Subversion (SVN)

Languages

Python, PHP, JavaScript, Java, SQL, TypeScript, C#, Swift 3, Swift, Java EE 8

Frameworks

Angular, Spring, Laravel, Spring MVC, Spring Boot, JBoss Seam, Laravel 5, AngularJS, Hibernate, Seam, Spring Security, Ionic, ASP.NET, Zend Framework, Kohana, Ionic 3, JPA, .NET 4, Android SDK, Sencha Touch, jBPM

Platforms

Docker, Blockchain, Blockchain Platforms, Java EE (Jakarta EE), JBoss, Jakarta EE (Java EE or J2EE), Eclipse, WordPress, Firebase, Amazon Web Services (AWS), Linux, Visual Studio 2016, iOS, Android, Oracle Database, LAMP, Oracle, IBM WebSphere

Storage

PostgreSQL, JBoss AS, Spring Data JPA, MongoDB, Microsoft SQL Server, IBM Db2, Memcached, MySQL, Redis, Data Pipelines

Paradigms

Adaptive, Agile Software Development, Compiler Design

Other

Enterprise Java Beans (EJB) 3, Artificial Intelligence (AI), Architecture, Machine Learning, Agentic AI, LangChain, OpenAI, Large Language Models (LLMs), AI Agents, eCommerce, Full-stack, API Integration, Cryptography, API Gateways, Data Scraping, Web Scraping, ChatGPT API, Robotic Process Automation (RPA), Sharding, SSL, Enterprise Java Beans (EJB), Federated Learning, Decentralized AI, Research, Ontologies, Semantic Web, Data Mining, Big Data, Big Data Architecture, Large-scale Web Crawlers, Networks, Hardware Design, Data Compression, Encryption, Operating Systems, Large Language Model Operations (LLMOps), Springbot, SAP, Distributed Ledger Technology (DLT), Natural Language Processing (NLP), Semantics, Digital Twin, Data Governance, Design Exploration, Simulation Process & Data Management, CI/CD Pipelines, FastAPI, Algorithmic Trading, Backtesting, Paper Trading, Technical Analysis, Technical Leadership, Retrieval-augmented Generation (RAG), CTO, Marketing Analytics, Data Analysis, Data Analytics, AI Chatbots, Chatbots, Time Series

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