About Bernard Arjan
Senior Software Engineer and remote freelance consultant with experience building secure, scalable web and mobile applications. Based in LATAM (Brazil), working fully remote with international and distributed teams. Strong background in Java, Angular/Ionic, system architecture, and team leadership, with a product-focused and collaborative mindset.
Dutch
Native or bilingual
English
Fluent
Portuguese
Fluent
Remote only
Primarily works remotely
Experience
- Draaisma.techFull-Stack Engineer (Self-employed)DIGITAL AND ITJanuary 2016 - Today (10 years and 7 months)Vitoria, Vitória - State of Espírito Santo, BrazilSituation: Delivered software consulting services to international clients via Upwork, primarily startups and SMEs building SaaS and platform-based products requiring scalable, production-ready systems.Task: Design and implement secure, high-performance applications capable of handling real-world transaction volumes while ensuring maintainability and rapid delivery.Action: Architected and built 10+ full-stack web and mobile applications, implemented scalable backend systems, introduced CI/CD pipelines and automated testing, and led/mentored distributed teams (2–5 engineers).Result: Delivered platforms capable of processing 100,000+ transactions per month, improving system stability, reducing post-release defects by ~30%, and enabling reliable transaction processing at scale.Takeaway: Developed strong expertise in designing scalable production systems while balancing speed, quality, and business requirements in client-driven environments.
- SciensanoFull-Stack Engineer (Remote)RESEARCHNovember 2020 - December 2025 (5 years and 1 month)Brussels, BelgiumSituation: Contributed to national public health platforms used by 350+ hospitals, managing sensitive medical data in a highly regulated environment.Task: Ensure system reliability, data security, and compliance while supporting continuous delivery and long-term maintainability.Action: Led a remote cross-functional team, designed and developed full-stack solutions (Java/Spring Boot, Angular), improved system architecture, and mentored engineers to increase delivery efficiency.Result: Maintained secure and stable systems processing 10,000+ health records daily across 350+ hospitals, improving reliability and reducing release cycle times.Takeaway: Built deep expertise in designing secure, compliant, and highly reliable systems in mission-critical environments.
- ETPI Sistemas e AutomaçãoFull-Stack Engineer (Hybrid)ENERGY AND UTILITIESSeptember 2016 - November 2020 (4 years and 2 months)Vitoria, Vitória - State of Espírito Santo, BrazilSituation: Developed a nationwide SaaS platform for sanitation service management, supporting operational field teams across Brazil, including 100+ teams in Espírito Santo.Task: Build backend systems and integrations to support real-time data synchronization and improve operational efficiency for field workers.Action: Implemented backend services, real-time synchronization, and workflow digitization, and introduced infrastructure and security improvements.Result: Enabled mobile-based operations for 100+ field teams (~500+ workers), improving task execution, coordination, and system reliability across regions.Takeaway: Strengthened ability to design systems that directly support real-world operations and real-time distributed workflows.
Recommendations
Be the first to recommend Bernard Arjan
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Cisco certified network associate Oracle certified java programmer Oracle certified master java developerCisco certified network associate Oracle certified java programmer Oracle certified master java developer
- Bachelor's DegreeNHL Hogeschool2006Bachelor's Degree