07/14/2026 updated

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100 % available

Backend Developer (NodeJS/PHP/Python) · DevOps Engineer · ETL Specialist

Osijek, Croatia
Worldwide
Osijek, Croatia
Worldwide

Profile attachments

December2025.pdf
Sebastijan-Placento-July2026.pdf

About me

Backend + DevOps engineer with 15 years in enterprise systems. Skilled in Node.js, PHP, Python, Bash, ETL pipelines, CI/CD, and multi-cloud (AWS/GCP/Azure) including bare-metal deployments.

HTMLJavaScript.NET FrameworkPHPADO.NETApplication Programming Interfaces (APIs)Agile MethodologyAmazon Web ServicesAnalogue ElectronicsApache HTTP ServerSoftware ApplicationsAtlassian JiraBash ShellC Sharp (Programming Language)UnixC++ (Programming Language)Cascading Style Sheets (CSS)Cloud ComputingComputer ProgrammingComputer NetworksDatabasesRelational DatabasesDebuggingSoftware Design PatternsDesktop ComputingLinuxDevOpsWeb DevelopmentDomain Name System (DNS)GitHubJSONjQueryPython (Programming Language)LaravelPostgreSQLMongoDBMySQLModel View Controller (MVC)RoutingNGINXNode.jsObject-Oriented Software DevelopmentScrum MethodologySoftware ArchitectureRedisScaled Agile FrameworkSoftware EngineeringSQLiteSQL DatabasesSystems ArchitectureJetBrains WebStormWordPressExtensible Markup Language (XML)Zend FrameworkNetwork RoutersGoogle CloudPIC MicrocontrollerPostmanSysadminBackendAdobe MagentoGitVba Programming LanguageCloudflareWeb TechnologiesNestJSRestful ApiNetwork ServerDockerWeb ApiProgramming LanguagesMicroservices
Agile software development, Agile, AWS, analog circuits, Apache, APIs, API, backend, Backend development, BASH scripting, C#, C++, CSS 3, Cloud, cloud solutions, CloudFlare, SSH, Basic programming, Programming, Databases, computers, devOps, Docker, DNS, Eclipse IDE, XML, Git, Github, Google cloud, HTML, HTML 2, INFORMATICS, JIRA, JQuery, JSON, Java, Javascript, Linux, Magento, Microservices, Access, MVC, Mongo, MongoDB, MySQL, routers, Servers, NGINX, NodeJS, NS, Object-oriented programming (OOP), Object-Oriented Programming, PHP, PHP 6, microcontrollers, PostGre, Postman, Programming languages, Python, Redis, Relational databases, RESTful api, routing, SQL, SQLite, Scaled Agile Framework, Scrum, desktop applications, software architecture, DEBUG, Design Patterns, application development, Sysadmin, system architecture, SYSTEM ARCHITECT, UNIX, VHDL, VB6, Web API, Web Development, Web technologies, Webstorm, Wordpress, ZEND

Experience

Professional experience10+ years
Freelancer since2018

Languages

GermanGoodEnglishFluentSlovakNative speakerCroatianNative speaker

Project history

CEO of private company, solo entrepreneur

Debug Labs d.o.o.

Internet & IT

< 10 team member

I design and optimize backend systems and infrastructure with a focus on performance, scalability, and long-term maintainability.
Professionally, I work across PHP, Node.js, Magento, and data pipelines — combining hands-on coding with DevOps practices to build reliable, efficient solutions.
More recently, I’ve been diving deeper into data science workflows and pipeline optimization to support smarter, data-driven platforms.

SOFTWARE ARCHITECT

AGILNO

Internet & IT

10-50 team member

Software Architect, Senior Backend Developer, and DevOps Engineer as needed. My key project was Datalytica, with
additional work on MPT and FutureVault. On Datalytica, I was responsible for optimizing the platform’s data ingestion and transformation processes, as well as overseeing DevOps-related work.

SOFTWARE ARCHITECT

HUMAN INTERACTION COMPANY

Internet & IT

10-50 team member

My role was System and Software Architect on ongoing projects, while also fulfilling roles as a Senior Backend
Developer and DevOps Engineer, as needed. Key projects include contributions to prominent websites like
coolinarika.com, rtl.hr, and a1.hr, where I was responsible for both development and DevOps tasks, focusing on
infrastructure, optimization, and seamless integration between systems.

SOFTWARE ARCHITECT

GAUSS DEVELOPMENT

Internet & IT

50-250 team member

Past roles (historically):
1. Lecturer for Gauss Informatika; PHP advanced class, MVC basics, ZEND basics and Magento 1
2. Maintenance of devices (routers and networks) and internal servers
3. Magento developer and project manager including relations with clients
4. DevOPS and Sysadmin : dedicated server setup and maintenance, site transferring, cloud solutions
AWS + google cloud, etc.)
5. Senior Backend developer
6. Magento Senior Developer
7. Backend (and Magento) Team Leader
8. Software architect
9. Head of Backend development

SOFTWARE DEVELOPER

Našice; JELISAVACWLAN
*System admin,
*maintenance of computers,
*relations with suppliers,
*PHP backend developer + mysql,
*Unix BASH scripting,
*Network setup, routing and security

Portfolio


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