Serafeim Makris

Software Engineer

Brussels, Brussels Region, Belgium10 yrs 6 mos experience

Highly Stable

Key Highlights

Over 10 years of experience in software engineering.
Expert in PKI and digital identity solutions.
Awarded Microsoft Imagine Cup winner.

Stackforce AI infers this person is a Cybersecurity expert specializing in digital identity and cloud solutions.

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Skills

Core Skills

Software ArchitectureCloud ComputingPkiDigital IdentityFull-stack DevelopmentBackend SolutionsSoftware Engineering

Other Skills

Cloud ApplicationsDevOps AutomationeIDASDigital SignaturesAPI SecurityNode.jsETL PipelinesData SynchronizationERP SystemsAPI DevelopmentB2B WebsitesMicroservicesDocker ProductsGitSpring Boot

About

Empowering organizations to build secure, scalable technology in the digital identity and cloud space. With over 10 years’ experience as a Senior Software Engineer, Solution Architect, and Consultant, I specialize in architecting and delivering robust backend systems, cloud-native platforms, and eIDAS-compliant PKI and digital signature solutions for enterprise and public sector clients. My expertise spans PKI, digital identity, API security, and the transformation of legacy infrastructures into modern, high-performing ecosystems. I’m recognized for driving measurable business results and solving complex technical challenges—whether building national eID and PKI platforms (Cyprus, Bahrain), optimizing cloud infrastructures, or mentoring teams on best practices and delivery excellence. My work has been awarded (Microsoft Imagine Cup winner) and trusted by organizations requiring enterprise-grade security and reliability. Fluent collaborating both within focused engineering teams and large cross-functional environments, I bridge technology, compliance, and business to deliver tangible impact. If you’re looking for a tech partner to scale, innovate, and de-risk your digital transformation, let’s connect and shape your next success story.

Experience

Self-employed

Freelance Senior Software Engineer

Nov 2024 – Present · 1 yr 4 mos · Brussels, Brussels Region, Belgium · Remote

Designed and developed scalable .NET cloud applications for enterprise and startup clients, enabling growth and rapid deployment.
Consulted on cloud migration strategy, reducing infrastructure costs by 30% and increasing platform resilience.
Mentored development teams and introduced best practices for secure software delivery and DevOps automation.

Software ArchitectureCloud ApplicationsDevOps AutomationCloud Computing

European commission

Senior Conference Operator

Nov 2024 – Present · 1 yr 4 mos · Brussels, Brussels Region, Belgium · On-site

Adacom cyber security

Senior PKI Developer

Jun 2019 – Oct 2024 · 5 yrs 4 mos · Greece · Hybrid

Established and led the development department, acting as the Solution Architect for all major PKI, eIDAS, and digital identity projects.
Delivered 28+ critical backend and cloud solutions, ranging from national eID platforms (Cyprus, Bahrain) to enterprise-scale digital signature integrations with major vendors.
Designed system architectures, security models, and certificate management processes, ensuring adherence to the highest standards of compliance and performance.
Recruited and mentored a lean engineering team (just two core developers) while coordinating closely with broader cross-functional groups, external contractors, and enterprise stakeholders.
Demonstrated versatility delivering major projects in both compact and complex multi-team environments, bridging engineering, compliance, and business needs.

PKIeIDASDigital IdentityBackend Solutions

Intale

Full Stack Engineer

Apr 2018 – Jun 2019 · 1 yr 2 mos · Greece

Took full ownership of the backend infrastructure powering thousands of IoT-enabled Raspberry Pis in production environments, refactoring and gradually migrating the legacy PHP 5.5 codebase to a modern Node.js stack for maintainability, scalability, and higher performance.
Designed and implemented robust data synchronization workflows between edge devices and the central .NET API, managing diverse database schemas (per-client schema pattern: e.g.) and ensuring reliable and secure data flow.
Developed ETL pipelines to transfer operational data from client-specific databases via API to analytics/data warehouse environments (enabling Power BI and 3rd-party integrations), unlocking business reporting and actionable insights.
Maintained and evolved the Cordova-based API responsible for automated iOS app releases, streamlining deployment and update cycles in the field.
Mentored junior engineers and introduced C# coding standards and best practices for the back-office system, supporting knowledge transfer and code quality within the team.

Node.jsETL PipelinesData SynchronizationFull-Stack DevelopmentBackend Solutions

Alfacon s.a. (άλφα σύμβουλοι πληροφορικής α.ε.)

ERP Consultant And Full Stack Developer

Sep 2015 – Apr 2018 · 2 yrs 7 mos · Athens

Collaborated with stakeholders to gather requirements and present ideas for the ERP system.
Created and designed reporting tools for the accounting and management departments.
Created B2B websites for pharmacy and manufacturing companies.
Developed bridges between various ERP solutions and websites.
Handled customer expectations and conducted training sessions.
Ensured clear communication between all parties involved in the projects.
Successfully developed and managed several ERP systems, resulting in improved business operations.
Successfully created custom APIs for e-shop interfaces, leading to increased efficiency and productivity.
Successfully created B2B websites for pharmacy and manufacturing companies, leading to increased business opportunities.
Successfully integrated various ERP solutions and websites, improving the overall workflow.