Backend Developer (PHP) — FinTech & Payment Systems

Optimus Search — Germany · Posted ~2 hours ago

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Description

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 developmentCollaborative code reviews and open technical discussionRigorous, automated testing strategiesLarge-scale backend architectures and transaction enginesUncompromising standards for clean, maintainable codeDaily 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 trainingMathematics, physics, or another analytical fieldBuilding production systems in PHP, Java, or PythonAI, machine learning, or research and developmentAgency work, consultancy, or freelance projectsSelf-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 depthA rock-solid grasp of software engineering principlesConfidence working within — and improving — large, intricate systemsKeen interest in building fast, always-available applicationsAbility to use AI development tools responsibly and criticallyRespect for quality: testing, reviews, and code that stands the test of timeA proactive approach to learning and growing your skillsExcitement about financial technology, banking, or payment infrastructure Direct experience in banking or payments is a bonus — but your mindset and drive count for more.