Full-stack Engineer (Kotlin) - Payments Team

Join FlixMobility, a leader in innovative mobility solutions, where technology meets sustainable travel. We offer a dynamic work environment, competitive compensation, and abundant opportunities for professional growth.As a Full-stack Engineer specializing in backend development with Kotlin, you will play a pivotal role in shaping the future of payment syste…

At Viktor, we are revolutionizing workplace efficiency with our AI coworker that seamlessly integrates with platforms like Slack and Microsoft Teams. Our technology connects to a multitude of tools, streamlining functions in finance, marketing, operations, and engineering. We are on a mission to replace a significant portion of the SaaS stack with a single intelligent teammate.Our team is compact yet impactful, providing the opportunity for significant contributions and innovations.The RoleAs an AI Engineer, you'll be at the forefront of developing Viktor. Imagine a scenario where a user requests Viktor to reconcile their Stripe payouts with their financial records. Viktor accomplishes this in real time, within a minute, leading to increased customer referrals and signups.Your primary responsibility will be to enhance Viktor's capabilities, ensuring it serves more clients effectively and reliably. Your work will set the standard for others to follow.Based in Munich, you'll collaborate closely with both founders, taking ownership of critical product areas, and witness your contributions go live the very same day.What You'll DoDevelop the agent runtime: Focus on sandboxed execution, tool orchestration, and memory management, transforming Slack commands into actionable API requests.Implement integrations: Connect Viktor to a wide array of tools including Salesforce, Notion, Stripe, QuickBooks, and more, utilizing OAuth, webhooks, and error handling to enhance customer experiences.Manage infrastructure: Oversee the processing of over 600,000 tool calls daily, ensuring efficiency through container orchestration and autoscaling.Release product features: Deliver functionality that users can access via Slack and Teams, allowing you to see immediate impacts from your work.Adapt to needs: Join a small team where you'll tackle various challenges not limited to the job description.How You'll Know You're SucceedingYou will consistently ship code to production, with your contributions reflecting in the changelog. Your features will directly contribute to customer success, and when challenges arise at any hour, your understanding of the system will enable you to address them efficiently. As your expertise grows, you'll take over responsibilities previously held by the founders.What We're Looking ForProficient coding skills: A strong commitment to AI-assisted development and experience with agent-based architectures and parallelized workflows.

Join Brainlab, a leading innovator in medical technology, as a (Senior) R&D Process Engineer. In this pivotal role, you will leverage your expertise to optimize research and development processes, ensuring our cutting-edge software solutions deliver the highest quality and efficiency. Your technical skills and problem-solving abilities will be essential as you collaborate with cross-functional teams to drive innovation and improve product performance.

Join Our Team at Avelios MedicalAt Avelios, we are dedicated to revolutionizing the healthcare sector through our innovative software solutions. Our mission is to develop a leading software platform that drives data-driven digitization in hospitals and enhances patient care. Our modular software platform is designed to optimize workflows in healthcare settings, utilizing state-of-the-art technology that prioritizes user experience. By using our software, healthcare professionals can deliver exceptional care to their patients. As we expand rapidly, we are looking for passionate individuals to join our diverse team and contribute to the future of healthcare.About the RoleWe are seeking an Automated Software Tester who will play a critical role in ensuring the quality and reliability of our software offerings, specifically in system simulation, cloud services, and data management. You will be responsible for meticulously planning, designing, and executing comprehensive testing strategies. Your success will be measured by your ability to deliver error-free releases, drive test automation, and provide insightful analysis from test results that enhance our software quality. You will support project leaders with technical guidance on testing and quality assurance, facilitating seamless integration and deployment of software components.Your Key ResponsibilitiesDesign, implement, and maintain automated UI testing frameworks for our software solutions.Develop and enhance Page Objects for UI components, ensuring stable and reusable interactions for testing.Organize and execute test cases based on Page Objects to validate workflows and user interactions.Analyze test outcomes, report issues, and continuously enhance test automation coverage and reliability.Collaborate with team members to advocate for testing best practices and ensure high-quality software delivery.Your QualificationsBachelor's degree in Computer Science, IT Security, Electrical Engineering, or a related field.Several years of experience in software testing, preferably with automated UI testing in web applications; experience in creating and maintaining reusable test components is a plus.Strong proficiency in TypeScript and familiarity with automated testing frameworks, ideally with experience in [specific frameworks].

ABOUT USAt Avelios, we are committed to revolutionizing healthcare through our advanced software platform that drives data-driven digitization in hospitals and patient care. Our mission is to provide a modular software solution that streamlines and enhances workflows in healthcare settings, empowering hospitals, doctors, and nurses to deliver optimal patient care. As we continue to grow rapidly, we are eager to expand our team and further our mission to fundamentally improve healthcare through digital solutions. We value diverse backgrounds and consider them a core strength of our organization.THE TEAM AND ROLEIn the role of (Senior) Accounting Manager (all genders), you will take proactive ownership of our accounting functions, financial governance, and ensure audit readiness. You will oversee our essential financial processes, ensuring reliability, strong controls, and scalability—delivering the data and process quality that our management and investors depend on for informed decision-making.You will assume full responsibility for the monthly and annual financial close in collaboration with our external accounting partner, guaranteeing accurate and audit-ready financial data. You will also manage our operational finance processes, encompassing invoicing, accounts receivable, and approval workflows, thereby laying the groundwork for efficient operations and high-quality reporting.Reporting directly to our Head of Finance, you will be the primary liaison for external partners, including tax advisors, auditors, and customer accounting departments.YOUR RESPONSIBILITIESOversee and guarantee the quality of the monthly and annual financial close under HGB, including managing accruals, revenue recognition, reconciliations, and conducting systematic plausibility checks.Lead AR/AP governance: manage invoice runs, dunning processes, payment approvals, vendor relationships, and oversee spending and approval workflows.Enhance our operational finance processes (Procure-to-Pay, Order-to-Cash, approval and control processes), establishing scalable policies, standards, and documentation.Coordinate and communicate with tax advisors, auditors, and other external partners to ensure comprehensive, accurate, and audit-ready documentation.Strategically develop the accounting function and the internal accounting organization, including taking on initial leadership responsibilities.

Join our innovative tech team at Sixt as a Senior Golang Developer. In this role, you will leverage your expertise in Golang to develop cutting-edge software solutions that enhance our operational efficiency and customer experience. You will work closely with cross-functional teams to design, implement, and maintain robust applications that drive our business forward.

At The Exploration Company, we are pioneering the future of space travel with Nyx, our innovative modular orbital vehicle designed for reusability and in-orbit refueling. This vehicle is engineered to carry both cargo and, eventually, human passengers.We are currently seeking a seasoned NDT Level 3 Engineer to join our expanding team in Munich or Bordeaux. This role offers a unique opportunity to engage directly in inspection activities during our initial production phase while also playing a vital role in shaping and enhancing our NDT capabilities for future endeavors.Your MissionConduct and oversee Non-Destructive Testing (NDT) on essential composite and welded aerospace components, utilizing UT, PT, ET, and VT techniques (knowledge of RT is an advantage).Support operations during the early production phase by actively performing inspections to ensure product conformity.Define, validate, and approve NDT methodologies in accordance with EN 4179 / NAS 410 and client-specific standards.Develop comprehensive inspection procedures and guarantee traceability of results.Lead the integration of automated and advanced inspection technologies (e.g., PAUT, robotic NDT).Collaborate closely with Engineering, Quality, and Production teams to address non-conformities and foster continuous improvement.Play a crucial role in establishing the future of the NDT department, including the training, mentoring, and qualification of Level 2 inspectors.Your ProfileCertified Level 3 in accordance with EN 4179 / NAS 410Ultrasonic Testing (UT) – mandatoryPenetrant Testing (PT) – mandatoryVisual Testing (VT) – mandatoryEddy Current Testing (ET) – preferredX-Ray Testing (RT) - preferredAdditional Level III certification according to ASNT-TC-1A (ASNT Level III) or ISO 9712 is highly preferred.Over 8 years of experience in aerospace, space, defense, or similar high-stakes industries.Proven track record in leading NDT efforts and driving quality assurance.

Join Our Team as a Product Engineer InternAt virtuhire, we are on the lookout for a passionate Product Engineer Intern to become a key member of our team focused on developing and enhancing the next generation of AI-driven enterprise finance solutions. In this role within our engineering team, you will significantly influence the creation of specialized features and aid some of the world's leading companies in automating their manual accounting processes.Collaborating closely with our founders and engineering team, you will transform innovative ideas into high-performing, user-friendly features that integrate seamlessly into our clients’ workflows. Your contributions will directly shape how finance teams leverage AI automation on a large scale.Our headquarters are in Munich, with strong connections to San Francisco through Y Combinator.

Role Overview JetBrains is hiring a QA Engineer to support quality and performance for AI assistant features across several locations in Europe. This role centers on testing and improving AI-driven product capabilities, working closely with developers and product managers to maintain high standards for users.

Join Us as a Software Product Owner (f/m/d)At Munich Electrification, we are at the forefront of driving the shift towards electric and connected mobility. We specialize in developing cutting-edge electronic control units for electric vehicles and stationary storage solutions for clients around the globe. Our dedicated international team is made up of exceptional engineers who are passionate about innovation. We pride ourselves on being a small yet specialized team, recognizing the value of every individual, and fostering an environment where each employee can thrive based on their unique skills and needs. Our office, which includes an adjacent prototype and testing lab, is conveniently located in the vibrant heart of Munich at Heimeranplatz.Our Core Values:- Technological Leadership: We push boundaries, innovate swiftly, and anticipate future needs, embracing calculated risks and learning from our experiences.- Sustainability: We are committed to making a positive impact on the environment and motivating others to join us in building a sustainable future.- Team Culture: We believe that work should be fulfilling and enjoyable, fostering inspiration, celebration, and collaboration across our global team.- Entrepreneurial Spirit: We adapt to change with enthusiasm, think boldly, and continually strive for excellence.

airapps seeks a Backend Quality Assurance Engineer based in Munich. This position centers on upholding and enhancing the quality of backend systems, collaborating closely with development teams to help deliver dependable software releases. Key responsibilities Develop and execute thorough test plans for backend services Partner with developers to identify and document software defects Contribute to continuous improvement of software quality Role overview This role requires careful attention to detail and a commitment to supporting reliable backend operations. The Backend Quality Assurance Engineer will play an active part in ensuring that backend releases meet airapps' standards for quality and stability.

Role Overview Veeam Software is seeking a Senior Sales Manager to oversee sales activities in the DACH region (Germany, Austria, and Switzerland). This position is based in Munich, Germany. What You Will Do Develop and execute strategic sales plans for the DACH market Lead and support a team of sales professionals Build and maintain relationships with key clients across Germany, Austria, and Switzerland Drive revenue growth and consistently work to exceed sales targets What We Look For Experience in the technology sector Strong background in sales management with a record of meeting or surpassing goals Ability to guide and motivate a high-performing team Skill in developing client relationships and strategic sales initiatives About Veeam Software Veeam delivers data management solutions to organizations worldwide. The Senior Sales Manager will play a key role in shaping the company’s growth in the DACH region.

JetBrains s.r.o. creates tools that help developers automate repetitive tasks so they can focus on writing quality code. Since 2000, the company has aimed to make software development more productive and enjoyable for engineers worldwide. Role overview The Customer Success Engineer - Kotlin Multiplatform (KMP) supports engineering teams as they adopt KMP in real-world projects. This role guides organizations from their first evaluation through to successful deployment. Along the way, it gathers feedback and collaborates closely with JetBrains product teams to help shape the future of KMP. What you will do Work directly with organizations at various stages of KMP adoption, from initial exploration to production rollout. Assist teams in migrating, integrating, and scaling shared codebases using Kotlin Multiplatform. Support teams moving from experimentation to production and help address technical challenges as they arise. Reach out to potential users who could benefit from adopting KMP. Identify each customer’s technical needs, use cases, and any barriers to adoption. Advise on architecture, feasibility, and strategies for implementing KMP. Collect structured feedback and insights from clients. Collaborate with JetBrains product and engineering teams to influence the KMP roadmap and improve available tooling. Common questions you'll help solve What is the safest way to migrate a large Android app to shared logic? How much code sharing is practical or advisable? How can teams address resistance from iOS developers working with Kotlin APIs? What’s the best way to organize a codebase for collaboration across teams? How can teams resolve slower build times after introducing KMP? How success is measured Organizations deliver Kotlin Multiplatform in production environments. Teams increase their use of shared code over time. KMP adoption continues beyond initial trials. User feedback results in tangible improvements to KMP and its tooling. Requirements Experience working with Kotlin, either for Android or backend development. Understanding of mobile architectures on both Android and iOS, especially with Kotlin. Strong communication skills and a knack for problem solving. Background with cloud technologies and CI/CD pipelines. Ability to collaborate effectively within a team-driven environment. Location This position is available in Amsterdam (Netherlands), Berlin or Munich (Germany), or remote within Germany.

About SE3 Labs SE3 Labs is building Spatial AI by combining advanced 3D computer vision with large language models. The team is focused on enabling machines to understand and interact with physical spaces, opening new possibilities for automation in fields like construction, smart infrastructure, and defense. To make this vision real, SE3 Labs is developing a high-performance robotics platform, starting with UAVs. The company is looking for an embedded engineer who can help build the core systems that allow these machines to communicate, update, and operate reliably in the field. Role Overview The Embedded Software / Firmware Engineer will own the low-level software stack for SE3 Labs' autonomy platform, which covers drones, payloads, and ground systems. This work shapes the reliability, durability, and performance of the flagship product. This is a hands-on, on-site position based at a prototyping and testing facility located 35km from Munich. The role involves close collaboration with hardware, testing, and AI software teams. Some travel may be required for field trials and partner evaluations. Contributions in this role directly impact system architecture and hardware design, helping move products from prototype to real-world deployment. What You Will Do Requirements & Bring-Up: Translate system requirements into embedded software architecture. Bring up new boards and subsystems on Jetson, Arm, and STM32 platforms. Drivers & Interfaces: Design and maintain drivers and hardware-facing code for sensors, cameras, AI accelerators, and communication networks. Kernel & System Layer: Work with embedded Linux, including kernel and device-tree configuration, BSP integration, and board bring-up, to create stable and maintainable systems. Flash, Boot & Deploy: Build and improve tools for flashing, booting, and serial deployment to support development, production, updates, and recovery. Location This role is based at an undisclosed test site approximately 35km from Munich. On-site presence is required, with occasional travel for field testing and partner work.

ABOUT USAt Avelios, we are dedicated to creating a premier software platform aimed at revolutionizing hospital operations and enhancing patient care through data-driven digitization. Our innovative modular software optimizes workflows within hospitals utilizing state-of-the-art technology, ensuring a user-friendly experience. We empower healthcare professionals, including hospitals, doctors, and nurses, to deliver exceptional patient care.As we rapidly expand, we seek to grow our team further to fundamentally enhance healthcare digitization for the better. We celebrate diverse backgrounds and view this diversity as one of our core strengths.THE TEAM AND YOUR ROLEAs a Solution Architect (All Genders) for Clinical Software Solutions, you will work at the confluence of sales, technology, and hospital operations. Your role is to merge your technical architecture expertise with an understanding of clinical and administrative processes, providing support to customers from initial product demonstrations through ongoing projects. By collaborating closely with engineering, project and product management, and sales teams, you will develop tailored, technically feasible solution concepts for our clients.YOUR TASKSDelivering technical support to the sales team throughout the entire sales cycle.Assessing clinical, administrative, and technical requirements of customers.Creating detailed technical concepts, documentation, and solution descriptions for proposals and tenders.Defining and aligning system architectures, APIs, and interfaces.Working closely with engineering, product, project, and DevOps teams.Serving as the primary technical contact for customers during both sales and project phases.Assisting in public and private tender processes.

Join vCluster Labs as a Senior Application Security Engineer and become an integral part of our mission to create a secure ecosystem. In this pivotal role, you will oversee the comprehensive security of our product offerings, ensuring that vCluster sets the benchmark for secure multi-tenancy in Kubernetes. Your expertise will help us establish security protocols that empower our clients to deploy high-privileged workloads with confidence, while you devise thorough strategies that encompass our entire codebase and infrastructure.Your responsibilities will include:Core Product Security: Conduct in-depth security assessments of our core Go-based applications and Kubernetes controllers, including the frontend user interface, with a focus on preventing privilege escalation in our multi-tenant architecture.Threat Modeling: Spearhead the threat modeling initiatives for new features by identifying risks linked to shared GPU resources and multi-cloud environments.Automated Security: Implement 'shift-left' practices by enhancing our CI and developer workflows with integrated security checks that prioritize speed, ensuring security remains a facilitator of engineering velocity. You will also oversee both automated and manual scanning across our product stack.Vulnerability Management: Take charge of the security vulnerability lifecycle, from detection to resolution. You will assess both internal and external reports, drive critical issue resolutions across engineering teams, and maintain effective communication with stakeholders.Feature Development: Contribute to the ideation and development of new features that often address security challenges such as container isolation and breakouts, pushing the limits of what can be achieved in constrained environments.Developer Training: Simplify complex security concepts for all engineers, covering new attack vectors and secure coding practices.You may be a great fit if you possess:Experience: At least 5 years in Application Security or Product Security, particularly within containerized environments.Kubernetes Expertise: A profound understanding of Kubernetes architecture, RBAC (Role-Based Access Control), and container runtime security, along with insight into the unique risks associated with these technologies.

Join rw1 as a Senior Solution Delivery Manager, where you will spearhead the complete delivery of innovative XR software solutions for leading organizations in the life sciences sector. In this pivotal role, you will report directly to the Director of Solution Delivery, transforming client needs and strategic goals into engaging XR experiences that provide significant value and long-term benefits—ensuring that innovation seamlessly aligns with our clients' scientific and business aspirations. As the key liaison between top-tier life-science companies and our multidisciplinary development teams, you will oversee daily operations, ensuring alignment, establishing clear priorities, and upholding high execution standards while proactively identifying and managing risks. You will excel in a dynamic, customer-focused, and innovation-led environment where your dedication to quality and enthusiasm for emerging XR technologies will harness the full potential of this transformative technology, creating a lasting impact for global leaders in the life sciences arena.

As a pivotal member of our team, you will play an essential role in shaping our product by designing, developing, and maintaining the autonomous agents that drive Causa Prima forward. Your work will encompass a variety of tasks, from validating invoices and resolving disputes to negotiating across companies and optimizing cash flow.Key Responsibilities:Agent Architecture: Craft the multi-agent system, defining agent boundaries, event contracts, orchestration patterns, and delineating between LLM reasoning and deterministic enforcement. LLMs will inform while rules will enforce.Document Processing Pipeline: Manage the ingestion, classification, and structured extraction of financial documents (such as invoices, contracts, purchase orders) utilizing LLM-based parsing and vision models, with a focus on sandboxed processing for untrusted documents.Validation & Anomaly Detection: Implement business rule checks, perform three-way matching, detect pricing discrepancies, and identify anomalies over time.Integration Framework: Integrate with platforms such as Gmail, Google Drive, Slack, banking APIs, crypto wallets, and accounting systems, focusing on authentication models, credential lifecycle, and data normalization.Knowledge Graph: Develop a Neo4j context graph that encapsulates implicit business knowledge, providing insights into the reasoning behind decisions, including entity extraction, GraphRAG patterns, and provenance tracking.Multi-LLM Strategy: Establish per-agent model selection, create structured output contracts using Pydantic schemas, and implement an evaluation framework along with a fallback strategy.Compliance & Security: Design agents to operate within a zero-trust model, ensuring independent verification against source data, outbound content review, and prevention of cascading failures from prompt injections.

At JetBrains, we are passionate about code. Since our inception in 2000, we have dedicated ourselves to developing the strongest and most effective developer tools available. Our innovative solutions automate routine checks and corrections, accelerating production and empowering developers to innovate, explore, and create.About the InitiativeJetBrains is transforming from standalone developer tools to a unified, AI-native platform for software development.AI is evolving from a mere assistant within the editor to an essential participant in software planning, building, reviewing, and operating across teams and organizations. This evolution presents new challenges that cannot be addressed by individual tools alone, including governance, security, cost management, observability, and cooperation between humans and autonomous agents.Our mission is to establish a platform that facilitates the adoption of AI in software development in a structured, scalable, and economically efficient manner, without confining companies to closed ecosystems.We are constructing a foundation that unifies developer workflows, team collaboration, and organizational oversight into a coherent system.This platform will act as the execution and governance layer for AI-driven development, tightly integrated with developer tools while designed for cross-team, product, and environmental compatibility.This initiative represents a long-term strategic investment for JetBrains and is a cornerstone of our vision for the future of software development. The RoleWe are seeking a Principal Engineer (JetBrains Cloud Platform, Developer Experience) to spearhead significant enhancements to the development experience across the JetBrains Cloud Platform (JCP).This position is pivotal in enhancing the productivity of JCP engineers through improvements to build systems, CI/CD pipelines, local development workflows, tooling infrastructure, and AI pipelines. You will oversee the developer experience from the local development, build, and testing stages to the transition of code through CI to production. Given the rapid growth of this platform, numerous workflows and processes are still in development. You will define what an exceptional development experience entails and guide the organization toward achieving it. As part of our team, you will:Develop and implement strategies for enhancing the developer experience across the entire JCP platform.Optimize build systems (such as Gradle and Nx) for improved speed, caching, and reliable reproducibility at scale.Establish AI development pipelines to facilitate innovation.

Join Mercura as an AI/LLM Engineering Intern!At Mercura, we are pioneering AI software that serves as the backbone of our economy. Supported by Y Combinator, we have successfully completed a significantly oversubscribed funding round, achieving one of the highest valuations in our cohort. As one of the fastest-growing startups in Europe, we proudly exceeded $2M in ARR within our first year. We are now on a mission to reach $10M ARR by the end of 2026 and are looking for dedicated team members who are ready to dive deep into this exciting journey.Our co-founder, Lukas, hails from a family with over 115 years of experience in the construction industry. Having worked on-site himself, he understands the persistent challenges in the industry, especially the slow and manual quoting processes. In an age where AI is becoming integral to industries, we are committed to enhancing human expertise and empowering individuals to focus on what only they can do.About the RoleAs an AI/LLM Engineering Intern, you will be instrumental in developing agentic AI systems from concept to deployment. This dynamic and hands-on position is ideal for engineers who possess a strong technical foundation, a proactive mindset, and a passion for innovation. You will be involved in creating robust AI systems that are production-ready—from retrieval and LLM orchestration to tool-using agents and seamless product integration.We hold our interns to the same standards as our full-time employees, entrusting them with ownership of projects and ensuring they are individuals we would want to collaborate with in the long term.If you are a passionate builder who thrives at the intersection of LLMs, data systems, AI, data engineering, and full-stack development, this is an incredible opportunity to influence how users engage with AI in practical workflows.Your ResponsibilitiesAgentic Systems: Design and develop LLM-powered agentic systems from experimentation to production deployment.Retrieval & Context: Create retrieval and context pipelines (RAG, hybrid search, structured retrieval) to facilitate reliable reasoning over vast amounts of technical and business data.AI Evaluations: Build evaluation and monitoring systems to assess and enhance AI performance in an operational environment.Data Pipelines: Construct scalable pipelines for processing and structuring large volumes of unstructured documents and data.