Achilleas Tsiolkas

Senior Software Engineer at Stealth Startup

Responsible for designing, building, and maintaining microservices and REST APIs that orchestrate data flows from multiple databases for analytics by internal systems. Implemented scalable back-end services using Node.js, Nest.js, and TypeScript; utilized Redis for caching; interfaced with PostgreSQL and MongoDB; versioned and deployed via GitLab; collaborated with data scientists to ensure reliable data delivery and performance.

Senior Software Engineer at Stealth Startup

Created and maintained microservices and REST APIs to manage data retrieved from databases for internal analytics. Technologies: Node.js, Nest.js, TypeScript; Redis; GitLab; PostgreSQL; MongoDB.

Senior Software Engineer at Stealth Startup

Senior Software Engineer responsible for creating and maintaining microservices and REST APIs to manage data retrieved from databases for analysis by internal systems. Technologies used include Node.js, Nest.js, TypeScript; Redis; GitLab; PostgreSQL; MongoDB.

Senior Software Engineer at Code.Hub

Worked on SpotlightPOS application, adding new features and maintaining the project.

Senior Software Engineer at Code.Hub

Contributed to SpotlightPOS by implementing new features and maintaining the application stack. Worked primarily with Node.js and JavaScript, with a front-end focus on AngularJS; integrated MySQL-based data storage and improved data synchronization across services.

Senior Software Engineer at Code.Hub Oxinus Holdings

Worked on SpotlightPOS application, adding new features and maintaining the project. Technologies used include Node.js, JavaScript; AngularJS; MySQL.

Senior Software Engineer at Storfund

Developed microservices and REST APIs to import and manage data from marketplaces (APIs, FTP), including sellers’ daily transactions to support payments calculations.

Senior Software Engineer at Storfund

Developed microservices and REST APIs to import and manage data from multiple marketplaces (e.g., Amazon, Backmarket) via APIs and FTP sources. Processed and analyzed sellers’ daily transactions to support payments calculations. Tech stack included Node.js, Nest.js, TypeScript, Redis, Heroku, and PostgreSQL.

Senior Software Engineer at Storfund

Implemented microservices and REST APIs to import and manage data from various marketplaces (APIs, FTP) including Amazon and BackMarket, processing sellers’ daily transactions for payments.

Fullstack Engineer at Green Panda

Implemented an ATM-like system that recognizes and assesses smartphones wirelessly and pays to bank accounts. Took on DevOps responsibilities in the last 6 months.

Fullstack Engineer at Green Panda

Implemented an 'ATM' that recognizes smartphones wirelessly and deposits/withdraws the offered amount to bank accounts. Led DevOps efforts for the last six months, containerizing services with Docker and orchestrating builds with Jenkins; stack included AngularJS, Node.js, and MySQL.

Fullstack Engineer at Green Panda

Developed an 'ATM' system that recognizes devices wirelessly and initiates payments to bank accounts. Also undertook DevOps responsibilities in the last six months.

Research and Development Engineer at Foundation for Research and Technology – Hellas (FORTH), Institute of Computer Science

Participated in the development of microservices for intelligent home management and control. Worked on AmI - Solertis, which manages behavior scripts that orchestrate facilities in Intelligent Environments and offers an enhanced web-based code editor.

Research and Development Engineer at Foundation for Research and Technology – Hellas (FORTH), Institute of Computer Science

Participated in the development of microservices for intelligent home management and control (AmI - Solertis). Contributed to AmI-TV, a media center, and backend for the Heraklion Public Transport informational system.

Research and Development Engineer at Foundation for Research and Technology – Hellas (FORTH), Institute of Computer Science

Participated in the development of microservices for intelligent home management and control (AmI-Solertis). Worked on AmI-Solertis project managing behavior scripts and an enhanced web-based code editor.

Front End Engineer at Turing Intelligence Technology Limited

Implemented tools for web services management and a platform for users to store and manage algorithms, including a web-based editor and execution tools.

Front End Engineer at Turing Intelligence Technology Limited

Part-time, remote work building tools for web services management and a platform for users to store and run algorithms, including a web-based editor and execution tools. Stack: Angular2, TypeScript, Node.js.

Front End Engineer at Turing Intelligence Technology Limited

Part-time, remote work building tools for web services management and a platform for users to store/manage algorithms, including a web-based editor and execution tools. Technologies include Angular, TypeScript, Node.js.

Undergraduate Student Researcher at Foundation for Research and Technology – Hellas (FORTH), Institute of Computer Science

Thesis work on web services for intelligent home management and control, including an auto-generated RESTful web service parsed from KNX XML exports. Contributed to AmITV, a multimodal media center for an intelligent living room environment.

Undergraduate Student Researcher at Foundation for Research and Technology – Hellas (FORTH), Institute of Computer Science

Thesis: Web services for Intelligent home management and control, including an auto-generated RESTful web service by parsing XML files exported from KNX projects.