You will get high performance full stack systems
Project details
Most software problems aren't caused by missing code; they're caused by bad code.
This gig is for clients who need real engineering: a backend API, a frontend module, or a complete feature built to professional standards. Every delivery follows clean architecture principles, focuses on performance and security, and is designed for long-term maintainability.
You'll receive clean source code, clear communication, and reliable delivery. Premium packages include detailed documentation, architecture guidance, and CI/CD or deployment support.
If you want software that still works six months from now, not just something that runs today, this gig is for you.
Incomplete or unclear requirements may impact delivery time.
This gig is for clients who need real engineering: a backend API, a frontend module, or a complete feature built to professional standards. Every delivery follows clean architecture principles, focuses on performance and security, and is designed for long-term maintainability.
You'll receive clean source code, clear communication, and reliable delivery. Premium packages include detailed documentation, architecture guidance, and CI/CD or deployment support.
If you want software that still works six months from now, not just something that runs today, this gig is for you.
Incomplete or unclear requirements may impact delivery time.
Programming Languages
HTML & CSS, Java, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, PSD to HTML, DesignWhat's included
| Service Tiers |
Starter
$450
|
Standard
$1,200
|
Advanced
$3,000
|
|---|---|---|---|
| Delivery Time | 4 days | 10 days | 14 days |
Number of Revisions | 0 | 0 | 0 |
Design Customization | |||
Content Upload | |||
Responsive Design | |||
Source Code |
6 reviews
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JC
Joao C.
Dec 11, 2024
Full Stack Angular / Spring Boot Developer
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Thuc N.
Oct 29, 2020
BRAZIL JOB - Need foreigners working in Brazil
Great work!
AM
Anup M.
May 12, 2020
WEB application in Spring boot
This freelancer is skilled and does good work. He always is available when you message. He understood the requirements quickly and delivered a high quality work product. Though we had to go through multiple iterations due to the changes in requirements , he handled it smoothly, We highly recommend Bernard.
AM
Anup M.
May 12, 2020
Architectural analysis for XML datamapper
Very much skilled, patient and cooperative.
Was able to describe the approach to solution immediately. Understood issues that were hidden in between the lines of the job
Was able to describe the approach to solution immediately. Understood issues that were hidden in between the lines of the job
JC
Joao C.
Apr 8, 2020
Full Stack Angular / Spring Boot Developer
Bernard has perfect communication and technical skills, both from a frontend and backend perspective.
We continue to working with him on an ongoing basis through other upwork contracts.
We continue to working with him on an ongoing basis through other upwork contracts.
About Bernard Arjan
End-to-End Engineer | Scalable SaaS & Platform Systems
Bolsward, Netherlands - 8:56 am local time
With 15+ years in engineering, starting from a background in computer science, embedded systems and electronics, I bring an end-to-end perspective that goes beyond typical full-stack development.
I work closely with teams to design systems, make technical decisions, and take ownership of delivery, ensuring solutions perform reliably in real-world production environments.
I have worked on systems operating at real scale. Platforms processing 100,000+ transactions per month. National healthcare systems handling 10,000+ records daily across 350+ hospitals.
My focus is simple: deliver systems that work in production, reliably, efficiently, and at scale.
I typically get involved when:
• A system needs to scale or be re-architected
• Performance or reliability becomes a bottleneck
• There is a gap between idea and execution
• Teams need clarity in technical direction and ownership
I work across the full lifecycle:
• System design and architecture
• Technical decision-making and delivery ownership
• Backend and frontend development
• Cloud-native infrastructure and deployment
• Performance, scalability, and reliability
What makes my approach different is the combination of hands-on development and system-level thinking. I stay close to the code where it matters, while also guiding architecture, simplifying complexity, and helping teams move forward with clear technical direction.
Beyond implementation, I help teams improve delivery, reduce complexity, and build sustainable engineering practices through better architecture, testing, and technical leadership.
I work remote-first through my consulting company, collaborating with teams across Europe and the US. Originally from the Netherlands and currently based in Brazil, I align well with European time zones and distributed teams.
If you are building or scaling a system and need someone who can take ownership from concept to delivery, as a partner or contractor, feel free to reach out.
I engage in direct and transparent collaborations only.
Steps for completing your project
After purchasing the project, send requirements so Bernard Arjan can start the project.
Delivery time starts when Bernard Arjan receives requirements from you.
Bernard Arjan works on your project following the steps below.
Revisions may occur after the delivery date.
Steps you’ll take to get the project done
I review your requirements, clarify scope, and confirm expectations before starting.
Planning & Setup
I define the technical approach, architecture, and set up the development environment.