Software Engineer – Payments

Job not on LinkedIn

🕒 September 4

🇩🇪 Germany – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 36%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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instellix

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2016

☁️ SaaS

💳 Fintech

🤝 B2B

SaaS • Fintech • B2B

instellix is an enterprise-grade monetization and billing platform provider that helps businesses launch, manage, and scale digital business models. The company offers SaaS software for subscription management, usage-based and hybrid pricing, billing automation, payment management, accounting & taxes, and reporting & analytics, with APIs and integrations for fast deployment into existing IT landscapes. Instellix targets B2B customers — including manufacturers, mobility, IoT, and SaaS vendors — and emphasizes compliance, security (ISO 27001), and global tax/invoicing support to enable complex, multi-party revenue models across markets.

📋 Description

• Design, implement, and maintain microservices in the payments domain • Develop intuitive UIs for complex payment processes • Ensure code extensibility and readability by applying Clean Code principles • Identify technical issues early through tracking, alerts, and monitoring • Monitor the processing of payment instructions, incoming settlements, and webhook calls • Support users and Customer Support with technical issues • Develop and maintain automated tests across relevant testing levels • Help operate platform services on Microsoft Azure and Amazon AWS in collaboration with DevOps • Work cross-functionally, share knowledge through pair programming, and develop solutions together with the team • Challenge existing code and clearly separate responsibilities to create maintainable solutions

🎯 Requirements

• Several years of experience in software development • Strong Java skills • Ideally, experience with Spring Boot and other technologies in the tech stack • Experience with relational and NoSQL databases • Experience with React, TypeScript, and Material UI • Interest in digital payments and financial processes • Experience with external APIs, webhooks, and asynchronous event processing is a plus • Experience in payments, fintech, or integration environments is preferred • Experience with payment service providers such as Adyen or Stripe is helpful, but not required • Interest in Domain-Driven Design, microservices, and hexagonal architecture; practical experience is preferred • Knowledge of Java, Spring Boot, Gradle, and Kubernetes • Experience with Microsoft Azure and Amazon AWS • Willingness and ability to use AI-assisted development tools • Fluent German (at least B2 level) • Good command of English

🏖️ Benefits

• 100% remote work from anywhere in Germany • Workation in EU countries • Highly flexible working hours with no core hours • High-performance laptops with your preferred operating system • High-quality equipment for your mobile office • Individual budget for professional development, conferences, training, or specialist literature • Subsidy for sports and fitness activities • Monthly allowance for ongoing mobile-work costs, including electricity and internet • Support with occupational pension provision • Employee referral program with an attractive bonus • Freedom to contribute your own ideas and take responsibility • Regular team events