I’m a Full-Stack Engineer with more than eight years of experience building scalable web applications and distributed systems, along with an additional two years background in embedded systems and low-level architecture. My early experience in embedded systems helped me develop a strong foundation in system design, performance, and core programming principles. During my time in the Greek army, which helped me to gain some experience in system administration and cybersecurity, I transitioned into full-stack development. This shift was driven by my passion for broadening my skills and knowledge but mostly from the passion I have for software design, where I considered the tech field was able to provide bigger challenges and opportunities. Throughout my career, I’ve worked across both backend and frontend systems, with a stronger focus on designing and building high-performance, scalable backend services. Currently I work in the fintech industry where I contribute to large-scale systems focusing on reliability, performance, and maintainability. My core expertise goes around in backend systems and distributed architectures, while also always interested in contributing and designing frontend systems when required. I’m particularly interested in software architecture and in building internal platforms, SDKs, and systems that improve development efficiency and team collaboration.

Petros Fousteris

I’m a Full-Stack Engineer with more than eight years of experience building scalable web applications and distributed systems, along with an additional two years background in embedded systems and low-level architecture. My early experience in embedded systems helped me develop a strong foundation in system design, performance, and core programming principles. During my time in the Greek army, which helped me to gain some experience in system administration and cybersecurity, I transitioned into full-stack development. This shift was driven by my passion for broadening my skills and knowledge but mostly from the passion I have for software design, where I considered the tech field was able to provide bigger challenges and opportunities. Throughout my career, I’ve worked across both backend and frontend systems, with a stronger focus on designing and building high-performance, scalable backend services. Currently I work in the fintech industry where I contribute to large-scale systems focusing on reliability, performance, and maintainability. My core expertise goes around in backend systems and distributed architectures, while also always interested in contributing and designing frontend systems when required. I’m particularly interested in software architecture and in building internal platforms, SDKs, and systems that improve development efficiency and team collaboration.

Available to hire

I’m a Full-Stack Engineer with more than eight years of experience building scalable web applications and distributed systems, along with an additional two years background in embedded systems and low-level architecture. My early experience in embedded systems helped me develop a strong foundation in system design, performance, and core programming principles. During my time in the Greek army, which helped me to gain some experience in system administration and cybersecurity, I transitioned into full-stack development. This shift was driven by my passion for broadening my skills and knowledge but mostly from the passion I have for software design, where I considered the tech field was able to provide bigger challenges and opportunities.

Throughout my career, I’ve worked across both backend and frontend systems, with a stronger focus on designing and building high-performance, scalable backend services. Currently I work in the fintech industry where I contribute to large-scale systems focusing on reliability, performance, and maintainability. My core expertise goes around in backend systems and distributed architectures, while also always interested in contributing and designing frontend systems when required. I’m particularly interested in software architecture and in building internal platforms, SDKs, and systems that improve development efficiency and team collaboration.

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Experience Level

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Intermediate
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Language

English
Advanced
Greek, Modern
Fluent

Work Experience

Full Stack Engineer, Dev Ops, Distributed Systems at Klarna
January 1, 2024 - Present
Designing and evolving backend systems on cloud infrastructure, applying event-driven and distributed system patterns, including messaging, workflow orchestration, and resilience strategies. Contributing to system architecture decisions, including service boundaries, communication patterns, and scalability in high-availability environments. Working with managed cloud services to build reliable and scalable production systems. Driving improvements in system observability and operational excellence. Participating in incident analysis and resolution, improving system reliability and reducing operational risk. Contributing to infrastructure and deployment workflows using cutting-edge technologies and CI/CD pipelines. Collaborating across teams to align on engineering standards and architectural patterns.
Full Stack Engineer, Dev Ops, Researcher at S-Rate
January 1, 2022 - December 31, 2024
Transformed product concepts into production-ready systems; contributed to core architecture and full-stack development. Designed internal SDKs and libraries, improving system performance, integration capabilities, and developer experience. Led development of core platforms and mobile applications, focusing on usability, scalability, and maintainability. Conducted R&D on concurrency models and system performance optimization. Established and improved CI/CD pipelines, ensuring reliable and efficient delivery processes. Mentored junior developers and contributed to team growth and engineering practices.
Full Stack Engineer, Dev Ops, Researcher at Icon Platforms
January 1, 2018 - December 31, 2024
Led development and evolution of legacy platforms used at scale, improving performance, flexibility, and maintainability. Designed and implemented full-stack features and APIs, supporting diverse client and business requirements. Built internal SDKs, libraries, and frameworks, significantly improving development efficiency and consistency. Optimized reporting systems, reducing execution time and improving operational performance. Contributed to DevOps practices and deployment workflows, enhancing delivery and reliability. Mentored junior developers and supported overall team development and knowledge sharing.
System Administrator, Penetration Tester at Greek Army
January 1, 2017 - December 31, 2018
Managed IT systems and infrastructure, ensuring operational stability and security. Gained experience in cybersecurity and penetration testing, identifying vulnerabilities and improving system resilience.
Software Engineer, Hardware Engineer at Locked P.C
January 1, 2016 - December 31, 2017
Designed and developed automation systems combining software and hardware components, focusing on event-driven behavior. Built microcontroller-based systems and supporting libraries, aligned with system-level requirements. Developed wireless sensor networks, improving connectivity, range, and reliability. Led development of automation platforms, enabling dynamic and responsive system workflows.
System Firmware, Software Engineer at Kabooto
January 1, 2016 - December 31, 2017
Developed and customized Android-based systems, including full ROM adaptations for dedicated hardware. Modified and optimized the Linux kernel, improving system stability and performance. Led system upgrades across Android versions, extending device lifecycle and capabilities.
System Administrator at Computer Engineering & Informatics Department [Volunteer]
January 1, 2010 - December 31, 2016
Supported maintenance and operation of departmental servers, ensuring reliability and availability. Provided user support and troubleshooting, improving overall system usability and stability.

Education

Bachelor's degree in Computer Engineering & Informatics at University of Patras, Greece
January 11, 2030 - April 1, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services