# Theodoros Zavos

Theodoros Zavos is a remote worker on Himalayas, Co-Founder & Principal Engineer at BitCraft Solutions Ltd, based in Greece.

Source: https://himalayas.app/@theodoroszavos

```text
Senior full stack engineer at Moosend building .NET 8 microservices and secure AWS service integrations.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Greece |
| Authorized to work in | Greece |
| Salary expectations | 90k+ EUR |
| Job categories | .NET Developer, Backend Engineer, Software Engineer |
| Skills | .NET 8+, .NET Core, ASP.NET Core, C#, Microservices Architecture, RESTful API Design, OAuth, OpenID Connect, JWT, mTLS, Certificate Based Authentication, AWS, Azure, Distributed Systems, Event Driven Architecture |
| LinkedIn | https://linkedin.com/in/theodoros-zavos |

## About

```text
At Moosend, I design, build, and run distributed .NET 8 and ASP.NET Core microservices on AWS. I implement service authentication with OAuth 2.0, OpenID Connect, JWT, mTLS, and certificate-based authentication.

I led upgrades of core .NET services and own build and release pipelines in TeamCity and Jenkins. I also tune database performance and maintain BDD test coverage with Gherkin.

At Intrasoft International S.A., I delivered full stack loan-sector web solutions for the National Bank of Greece in a regulated banking environment. I also designed and documented REST APIs and built Selenium test automation.
```

## Experience

### Co-Founder & Principal Engineer (current)

BitCraft Solutions Ltd. Aug 2025 - Present

```text
Co-founded a software and AI consultancy; define technical standards and review practice across client engagements. Run technical health checks: audit architecture, code quality, infrastructure, and engineering process, and deliver prioritised improvement roadmaps.
```

Skills: Software-Architecture, Code-Review, Technical-Audits, AI, Consulting

### Senior Software Engineer (current)

Moosend. Sep 2022 - Present

```text
Design, build, and run distributed microservices in .NET 8 and ASP.NET Core on AWS, covering RESTful API design, service-to-service communication, and asynchronous processing. Led the upgrade of core .NET services and own build and release pipelines in TeamCity and Jenkins.
```

Skills: .NET-8+, ASP.NET-Core, AWS, RESTful-API-Design, RabbitMQ, Amazon-SQS, DynamoDB, MySQL, Elasticsearch, Lambda, OAuth, OpenID-Connect, JWT, mTLS, TeamCity, Jenkins, BDD, Gherkin

### Founder & CTO

XPensAI / Metabloq. Jan 2022 - Jan 2026

```text
Founded an AWS-based AI product and led a team of three; owned architecture, technology selection, and coding standards.
```

Skills: AWS, AI, Architecture, Technology-Selection, Coding-Standards

### Senior Backend Engineer (Contract)

PwC, IDIKA S.A.. Jun 2025 - Dec 2025

```text
Designed and built backend services and APIs for national-scale public health systems where security, auditability, and reliability governed every design decision. Delivered against formal specifications and fixed milestones alongside client stakeholders and a Big Four delivery team.
```

Skills: Backend-Services, API-Design, Security, Auditability, Reliability

### Software Engineer

more.com. Jan 2022 - Sep 2022

```text
Built pricing and billing microservices for a European cloud payments platform on Azure with Cosmos DB, in transaction paths where correctness was critical.
```

Skills: Azure, Azure-Cosmos-DB, Microservices, Pricing, Billing

### Software Engineer

Intrasoft International S.A.. Apr 2020 - Dec 2021

```text
Delivered full stack loan-sector web solutions for the National Bank of Greece using .NET Core and .NET Framework with ReactJS, within a regulated banking environment. Designed and documented REST APIs, built Selenium test automation, and took project leadership responsibilities.
```

Skills: .NET-Core, .NET-Framework, React, REST-APIs, Selenium, Testing-Automation, Project-Leadership

### PHP / Magento 2 Developer

Netsteps. Jun 2017 - Mar 2020

```text
Built backend and frontend modules, REST and SOAP APIs, and third-party ERP integrations for a certified Magento solution partner; handled deployment and DevOps duties.
```

Skills: PHP, Magento, REST-APIs, SOAP-APIs, ERP-Integration, DevOps

## Education

### University of Patras

Bachelor of Science, Computer Engineering & Informatics. 2012 - 2017

```text
BSc in Computer Engineering & Informatics. Thesis on evaluation of real-time data processing using deep learning algorithms and techniques.
```

## Tech stack

- Selenium
- Jenkins
- MySQL
- PostgreSQL
- .NET Core
- ASP.NET Core
- JavaScript
- Python
- PHP
- C#
- RabbitMQ
- Elasticsearch
- AWS Lambda
- TypeScript
- Git
- Docker
- Solidity
- TeamCity
- Entity Framework Core
- AWS
- Azure

To contact Theodoros, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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