Backend Developer (PHP) — FinTech & Payment Systems

Optimus Search; Nürnberg; Vor Ort; EUR 65.000 - 90.000; Vollzeit

Zusammenfassung

Optimus Search is seeking a Backend Developer to join our team in Germany. You will build and maintain transaction-processing systems powering FinTech and payment operations, with PHP as the primary language and Java as a strong companion.

You’ll contribute to a reliable, scalable infrastructure and write clean, maintainable code. You’ll participate in code reviews, automated testing, and continuous improvement.

Qualifikationen

• Production systems experience or building backend services.
• Strong analytical, problem-solving, and debugging skills.
• Familiarity with AI-assisted development tools.

Aufgaben

• Develop and maintain transaction-processing systems.
• Participate in code reviews and automated testing.
• Apply AI tooling responsibly and critically.

Kenntnisse

PHP programming

Analytical thinking

Backend architecture

Ausbildung

Formal CS/Engineering training

Tools

Java

Python

Claude AI tools

Jobbeschreibung

Backend Developer (PHP) — FinTech & Payment Systems

Based in Germany

Focus: PHP · Java · High-Resilience Platforms · AI-Enhanced Engineering

The role:

We’re on the lookout for an inquisitive, sharp-minded Backend Developer to join our team and help shape the robust, mission-critical infrastructure that powers FinTech and payment operations.

This isn’t about checking off buzzwords on a resume. We need someone who can dissect complexity, reason through challenges, and engineer dependable solutions, because in our world, speed, stability, and precision are everything.

What You’ll Be Working With

You’ll develop and maintain the transaction-processing systems that form the backbone of financial services — where reliability is never optional. Our engineering culture is built on teamwork, modern practices, and continuous improvement:

• Agile workflows and iterative development
• Collaborative code reviews and open technical discussion
• Rigorous, automated testing strategies
• Large-scale backend architectures and transaction engines
• Uncompromising standards for clean, maintainable code
• Daily integration of Claude and other AI development tools

AI is deeply embedded in our process — and it’s here to stay. That means we need developers who don’t just accept AI-generated code at face value: you’ll understand, question, debug, and elevate what it produces.

Who We Hope to Find

While PHP is our primary language, we’re equally interested in strong backend engineers coming from Java or other solid technical backgrounds. We care far more about how you think than exactly what you’ve listed.

Your background could be:

• Formal software engineering or computer science training
• Mathematics, physics, or another analytical field
• Building production systems in PHP, Java, or Python
• AI, machine learning, or research and development
• Agency work, consultancy, or freelance projects
• Self-directed learning or an unconventional career journey

Our team has grown from all kinds of professional paths — the common thread is sharp analysis, genuine curiosity, and real enthusiasm for FinTech and payment technology.

What Matters Most to Us

• Clear, logical problem-solving and analytical depth
• A rock-solid grasp of software engineering principles
• Confidence working within — and improving — large, intricate systems
• Keen interest in building fast, always-available applications
• Ability to use AI development tools responsibly and critically
• Respect for quality: testing, reviews, and code that stands the test of time
• Proactive approach to learning and growing your skills
• Excitement about financial technology, banking, or payment infrastructure

Direct experience in banking or payments is a bonus — but your mindset and drive count for more.