Senior Backend Software Engineer - Scalability and Performance

Join our innovative team as a Senior Software Engineer specializing in orchestration and automation at Celonis in Madrid. In this pivotal role, you will be instrumental in designing and developing cutting-edge software solutions that enhance our automation capabilities. Collaborate with cross-functional teams to streamline processes and drive efficiency across our platforms.

At Celonis, we are the global pioneers in Process Intelligence technology and a rapidly growing SaaS company. Our mission is to revolutionize productivity by integrating AI, data, and intelligence into core business processes. Ready to make a difference with us?The TeamJoin our expanding Orchestration & Automation team, where you will play a pivotal role in guiding teams and engineers to create and maintain resilient, reliable, and scalable systems. You will take ownership of our product's health, ensuring its availability and performance across the board, and actively contribute to software development and maintenance.Enhance your expertise using cutting-edge technologies including Java, Go, TypeScript, DevOps tools, CI/CD, containerization, orchestration, and infrastructure as code, while collaborating with your engineering team and the Platform and SRE organization at Celonis.The RoleAs an Engineering Manager, you will oversee a team of up to 6 engineers specializing in Orchestration & Automation. Your role involves supporting your team in delivering robust solutions across the entire technology stack, from backend to frontend, and from platform to product. You will collaborate in a strong cross-functional environment, working alongside product, UX, and engineering teams to bolster our orchestration & automation capabilities and shape the future with composable enterprises. Expect to be hands-on, contributing to features and fostering the growth of your team's skills and capabilities.Key ResponsibilitiesManage a team of up to 12 individual contributorsEnhance the professional development of engineers, focusing on performance managementCollaborate with leadership and cross-functional teams to ensure impactful product functionalityWork with Product, Platform, SRE, and QE teams to deliver end-to-end solutions with high availability and reliabilityDevelop the team's roadmap in conjunction with product management, streamlining internal discovery and delivery processesGuide a technical roadmap to align our systems with modern standards and best practicesContribute to development across frontend and backend technologies

Location: Madrid Office About Aircall Aircall builds an AI-driven customer communications platform used by over 22,000 businesses worldwide. Our product brings together voice, SMS, WhatsApp, and AI features in a single workspace, helping teams boost revenue, resolve issues faster, and scale their operations efficiently. Headquartered in Paris, Aircall has a strong global footprint with offices in Seattle, Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our company is growing quickly, supported by leading investors and advances in AI across our product lines. Our Culture We focus on customer satisfaction, data-driven decisions, and meaningful results. Team members are encouraged to take ownership, keep learning, and act quickly but thoughtfully. Collaboration, trust, and impact shape our daily work. About the New Product Unit Aircall is launching a New Product Unit dedicated to advancing autonomous sales. The team is building an AI Orchestration Layer that records and understands customer interactions across calls, video, email, and WhatsApp. This system will automate sales workflows such as CRM updates, follow-ups, task creation, and coaching insights. Our long-term vision is a self-optimizing Sales OS powered by specialized AI agents working together to improve revenue processes. Role Overview: Senior Backend Software Engineer (Python) This position calls for an experienced backend engineer with strong Python skills, ready to work beyond traditional backend boundaries. The role suits someone who values both clean architecture and practical progress, and who can balance high-quality work with the need for speed in a startup setting. What You Will Do Tackle complex technical challenges, including distributed systems, AI orchestration, architecture, performance, and scalability Contribute to the design and implementation of backend systems for the AI Orchestration Layer Work closely with product and engineering teams to deliver new features Iterate quickly, shipping solutions and learning from feedback Who Will Thrive Engineers who enjoy solving difficult problems and making architectural decisions Those who can dive deep into technical details while keeping an eye on rapid delivery People who take pride in their work and appreciate the pace of a growing company

Role overview Celonis is looking for a Senior Engineer in Workday Integration & Automation based in Madrid, Spain. The position focuses on improving how Workday connects with other systems and developing automation that supports business operations. What you will do Refine and optimize integration processes for Workday systems Create and improve automation solutions to increase operational efficiency Collaborate with teams across the company to design and implement integration strategies aligned with business objectives

Role overview Miratech seeks a Business Analyst specializing in Platform & Orchestration for its Madrid office. This position centers on enhancing platform capabilities and streamlining orchestration processes to better serve business needs. What you will do Collaborate with teams across departments to gather requirements for platform and orchestration initiatives Convert business objectives into actionable insights and recommendations Help maintain alignment between platforms and the expectations of clients and stakeholders Contribute to the ongoing improvement of platform features and orchestration workflows Location This role is based in Madrid.

About Air Apps Air Apps builds AI-powered planning tools for individuals and entrepreneurs. Founded in Lisbon in 2018, the company has grown to offices in Lisbon and San Francisco and reached over 100 million downloads worldwide. As a self-funded, family-founded business, Air Apps focuses on long-term impact and practical solutions that help people manage resources and plan more effectively. QA Automation Engineer – Madrid (Onsite) The QA Automation Engineer will play a key role in developing and maintaining automated testing frameworks and regression test suites. This work helps ensure the quality, stability, and performance of Air Apps’ products across both web and mobile platforms. Collaboration is central to the role. The QA Automation Engineer will work closely with developers, product managers, and other QA professionals to design and implement automated testing strategies, increase test coverage, and improve the efficiency of the testing process. What You Will Do Develop and maintain automated test frameworks and regression suites Work with cross-functional teams to implement effective automated testing strategies Enhance test coverage and improve testing efficiency for web and mobile applications Help ensure the stability, performance, and reliability of Air Apps’ products Work Location and Relocation Support This is a fully onsite position in the Madrid office Relocation assistance is available for qualified candidates

Ebury empowers ambitious businesses to achieve global expansion, and we apply the same philosophy to our workforce. We promote innovation, collaboration, and problem-solving, creating an environment where every employee feels valued, supported, and empowered to thrive.If you are a team player eager to revolutionize global business operations, reach out to us. We would love to explore how Ebury can enhance your career and help you shape the future.Senior Software EngineerMadrid Office - Hybrid: 4 days in the office, 1 day working from homeThe FinCore Engineering team at Ebury is looking for a talented Software Engineer to play a vital role in our diverse team located across South America and Europe. The successful candidate will be responsible for developing and optimizing our multi-currency accounting system and facilitating foreign currency exchanges. Your contributions will be essential as we strive to elevate our platform and deliver the best FX experience for our clients and operational teams.As a Senior Software Engineer, your technical expertise will be crucial to our ongoing innovation and growth. We prioritize collaboration and commitment, functioning in a distributed model where effective teamwork is essential.

Ebury empowers ambitious businesses to achieve global growth, and we adopt the same philosophy for our team members. We promote innovation, collaboration, and problem-solving, creating an inclusive environment where everyone feels valued, supported, and empowered to thrive.If you are a collaborative individual eager to revolutionize how businesses operate on a global scale, we invite you to connect with us. Let's explore how Ebury can fast-track your career and enable you to shape the future.Senior Software Engineer (Money Flows)Ebury Madrid or Malaga Office - Hybrid: 4 days in the office, 1 day working from homeThe Engineering team at Ebury is searching for a Senior Software Engineer to play a pivotal role within our diverse team across South America and Europe. The successful candidate will be responsible for developing and optimizing our multi-currency account systems, as well as managing incoming funds and outgoing payment processes. Your contributions will be vital as we continually enhance our platform to deliver an unparalleled payment experience for our clients and operational teams.As a Senior Software Engineer, your technical expertise and skill set will be crucial to driving our innovation and growth. We value strong collaboration and commitment, working effectively within a distributed team.

Join T-Systems Iberia as an IMS Automation Engineer and drive innovation in our automation processes. We are looking for a skilled professional who will play a critical role in enhancing our operational efficiency through automation.Your responsibilities will include designing, developing, and implementing automated solutions in our IMS environments, ensuring seamless integration and functionality. You will work collaboratively with cross-functional teams to identify opportunities for automation and contribute to our continuous improvement initiatives.

At KingMakers, we are proud to be the leading platform for sports and iGaming entertainment in Africa, where millions of players engage daily across various markets. Since our inception with BetKing in Nigeria in 2018, we have rapidly expanded our footprint, most recently with the acquisition of SuperSportBet in South Africa. Our dynamic Product & Engineering organization boasts hubs across Europe and Africa, and we are committed to scaling our innovative technology platform in real-time.In this pivotal role, you will be at the forefront of our growth trajectory by driving our payments infrastructure. Every market expansion hinges on our payment systems, which handle every deposit, withdrawal, and transaction across all regions we serve. As we grow, you will face increasing complexities involving more markets, payment providers, and regulatory environments, alongside higher transaction volumes.This role is high-impact; your work will directly influence the financial infrastructure that supports our operations across multiple markets. Reliability, accuracy, and performance are paramount, and your engineering contributions will have immediate implications for both our players and the business. You will be an integral part of a collaborative squad, involved in the entire software development lifecycle, from design to production ownership.Key Responsibilities:Design, develop, and maintain payment processing services, integrating with third-party payment providers, PSPs, and financial networks.Manage features from inception to delivery, including technical design, testing, monitoring, and production support.Utilize event-driven architectures (Kafka, Service Bus) to facilitate reliable, asynchronous processing of high-volume financial transactions.Contribute to a microservices architecture built on .NET/C#, with REST APIs, gRPC, and Azure cloud infrastructure.Work closely with product managers, QA engineers, and other teams (Risk, Platform, Player Account) to create seamless user experiences.Participate in code reviews and contribute to the overall quality of engineering within the squad.Assist in diagnosing and resolving production incidents by identifying root causes.Engage in technical discussions to advocate for optimal solutions.

Join Ebury, a leading fintech company revolutionizing the financial services landscape. We are looking for a Senior Software Engineer to be a pivotal part of our innovative team in Madrid. In this role, you will leverage your expertise to develop and enhance our cutting-edge financial solutions, collaborating with cross-functional teams to deliver exceptional products.

Join aircall, a leading AI-driven customer communication platform, as we innovate the way businesses interact with their customers. With over 22,000 companies relying on our services, we integrate voice, SMS, WhatsApp, and AI into a unified workspace designed to enhance efficiency and drive revenue.Our vision is simple yet powerful: empower teams to work smarter, not harder. With tools like our AI Voice Agent for automating routine calls and AI Assist Pro for real-time guidance, we ensure that our teams can achieve peak performance and fast resolutions.Headquartered in Paris, with a strong presence in North America and multiple offices including Madrid, London, and New York City, aircall is backed by top-tier investors and is rapidly evolving through AI innovation across various product lines.At aircall, you will be part of a dynamic and ambitious team focused on impactful results. We prioritize ownership, continuous learning, and agile practices. If you thrive in a collaborative and fast-paced environment, you will flourish here.We are seeking a dedicated and enthusiastic Senior Software Engineer to enhance our engineering department and contribute to our innovative projects.In this role, you will oversee the design, development, deployment, and maintenance of essential features that deliver significant value to our customers. You will champion operational excellence and best practices while mentoring your team and the wider engineering community.Your work will focus on elevating quality, excellence, and agility within our delivery processes. You will work primarily with NodeJS and Typescript, ensuring our solutions are effectively hosted on AWS.

At Celonis, we are at the forefront of Process Intelligence technology, recognized globally as a leader among the fastest-growing SaaS companies. Our mission is to harness the power of AI, data, and intelligence to revolutionize business processes, and we're seeking talented individuals like you to help us achieve this vision. Are you ready to make an impact?The Team:Join our dynamic Celonis Support Services team, a vital component of our 3-Level Support model, as a dedicated 2nd Level Technical Support Engineer. Your base will be in Madrid, where you will report directly to the Director of Customer Support.The Role:As a Senior Software Support Engineer, you will be an essential player in diagnosing and resolving intricate technical and product-related challenges across the Celonis Product Suite. You will act as a vital link between our global customers, partners, and our internal Value Engineering & Delivery, Development, and Product Management teams. We are looking for someone who is enthusiastic about becoming a deep technical expert in Celonis infrastructure and software while contributing to a customer-centered SaaS environment.Your Responsibilities:Focus on expert technical analysis, resolution of complex incidents, and driving ongoing improvements in support operations:Deliver 2nd Level technical support for customer inquiries related to Celonis Systems & Products.Act as a Technical Contact for Premier Customers.Take ownership of complex cases by accepting, qualifying, driving, and resolving them in alignment with ITSM processes and KPI standards.Conduct in-depth analysis, diagnosis, and recovery of complex technical issues, frequently collaborating with customers and internal Product and Engineering teams.Engage in Root Cause Analysis (RCA) activities to enhance the team’s support Knowledge Base.Actively contribute to Continual Service Improvement (CSI) initiatives, including Knowledge Centred Service (KCS).Prepare and present Webcasts on selected technical topics for customers and internal support staff.Participate in an on-call schedule to ensure continuous global coverage.

Welcome to Adyen! At Adyen, we revolutionize the financial technology landscape by providing a comprehensive suite of payment, data, and financial solutions. Our esteemed clients include industry giants like Meta, Uber, H&M, and Microsoft, solidifying our position as the go-to financial technology platform. We are driven by ambition and innovation in every aspect of our work. We believe in fostering a dynamic environment where talented individuals can thrive. Our culture encourages ownership, collaboration, and problem-solving amongst diverse teams facing unique technical challenges. Together, we develop ethical and innovative solutions that empower businesses to achieve their goals efficiently. About Our Financial Products: Adyen is expanding its horizons beyond payments, creating a comprehensive range of embedded financial services tailored for platforms, marketplaces, SaaS businesses, on-demand services, and crowdfunding initiatives. Our mission is to facilitate seamless global management of payments and financial services through cutting-edge API integrations and hosted solutions. Our innovative platform enables businesses to: Execute onboarding, verification, and compliance processes across diverse markets. Manage transactions and expedite payouts and bank transfers in preferred currencies. Provide value-added services such as capital lending and the issuance of payment cards and bank accounts. Our team is dedicated to developing the technology that underpins this unified platform, focusing on various critical areas. Your Role: Develop and maintain our high-performance distributed platform. Contribute to architectural design decisions ensuring our platform's scalability. Mentor and coach junior engineers, fostering a culture of feedback and continuous improvement. Collaborate with a diverse and inclusive team. Launch quickly and iterate frequently, impacting businesses and customers from day one. Identify and enhance platform components for greater robustness and scalability. Work across teams and time zones to drive initiatives, review code, and embrace constructive feedback.

About Speechify Speechify builds tools that turn text into audio, making reading more accessible for millions. With over 50 million users, our products convert everything from PDFs and books to Google Docs and websites into spoken word. Our apps span iOS, Android, Mac, and Chrome, with our Chrome extension earning recognition as Chrome Extension of the Year by Google and a 2025 Design Award for Inclusivity from Apple. Our team of nearly 200 works fully remotely across the globe, drawing on experience from companies like Amazon, Microsoft, and Google, as well as top academic backgrounds. Collaboration is central here, with engineers, AI researchers, and product thinkers working closely together. Role Overview: Senior Software Engineer – Windows/Desktop Applications This Madrid-based role focuses on building and shaping native Windows desktop applications. The position calls for deep knowledge of Windows App SDK, WinUI, C#, XAML, and occasional C++. What You’ll Do Lead the design and development of native Windows desktop apps using Windows App SDK, WinUI, C#, XAML, and C++ as needed. Define and uphold standards for code architecture, performance, memory management, UI responsiveness, and compatibility across Windows versions. Advance accessibility by integrating support for accessibility APIs, ensuring the app remains usable for all, including users with disabilities. Collaborate with product designers, UX researchers, QA, and other stakeholders to plan features and set long-term strategy for the Windows platform. Manage the full lifecycle of features: from concept and design through implementation, testing, release, and ongoing maintenance. Troubleshoot and resolve complex bugs, performance bottlenecks, and architectural issues, recommending effective solutions. Location Madrid, Spain

Ebury empowers ambitious enterprises to tap into global growth, mirroring our commitment to our team members. We promote innovation, collaboration, and problem-solving, nurturing an environment where everyone feels valued, included, and equipped for success.If you're a collaborative thinker eager to redefine global business operations, reach out to us. We’re excited to explore how Ebury can fast-track your career and allow you to shape the future.Senior Backend Engineer - JavaScript/TypeScriptEbury (Madrid/Málaga) Office - Hybrid: 4 days in the office, 1 day working from home per weekEbury is a rapidly growing FinTech company on a mission to transform international trade. Our Client Operations Automation squad is at the forefront of this transformation, working on the "Internal Engine" of our global delivery organization.We're advancing beyond conventional automation into the realm of Agentic Orchestration. Your role will extend beyond scripting; you'll design high-performance distributed systems and AI-driven processes that facilitate real-time compliance, client lifecycle management (CLM), and sophisticated RFI workflows.Technical Leadership & Team ContextIn this pivotal role, you will serve as the primary technical leader of your squad, collaborating with three mid-level engineers and one Associate Engineer. You will be the lead architect and mentor, establishing engineering standards and guiding the technical roadmap for enhanced operational efficiency at Ebury.Your ImpactArchitect Intelligent Systems: Spearhead the design and implementation of intricate state machines and workflow orchestration utilizing Temporal and Node.js/TypeScript.Production-Grade AI: Implement and enhance Gemini in production to automate non-deterministic operational tasks, converting manual reviews into streamlined, automated processes.Drive Strategic KPIs: Take ownership of technical objectives that lower our Manual Intervention Rate and enhance Average Handling Time (AHT) for global client operations.Engineering Excellence: Set best practices for observability, "exactly-once" execution, and resilience within distributed systems.Mentorship: Contribute to the team's development through RFC reviews, technical workshops, and collaborative coding sessions with mid-level and associate engineers.

About Speechify Speechify helps people access information by listening instead of reading. Users can listen to articles, cloud documents, and books on their phones, making learning more flexible and accessible. As the top-ranked app in its category, Speechify continues to grow quickly and reshape how people consume audio information. Role Overview The Core Experiences Team builds and maintains the services and SDKs that support Speechify’s product across many platforms. As a Senior Software Engineer in Madrid, this role combines product development with infrastructure work. The position suits someone who enjoys designing reliable APIs, creating straightforward systems, and improving user experience through thoughtful engineering decisions. What You Will Do Collaborate with Product Teams to define project scopes, improve processes for faster customer feedback, and balance integration and user experience needs across teams. Deliver solutions through Speechify’s cross-platform SDK. Improve existing features for better performance, including faster load times and smarter parsing, by refining abstractions and algorithms. Build cloud functions, lightweight backend services, and jobs using Kotlin. What We Look For Strong systems thinking and a preference for simple, effective design. Ability to move quickly, generate ideas, and distinguish between immediate deliverables and projects that need more time. Focus and adaptability within a startup setting, knowing when to collaborate and when to work independently. Experience working with designers, marketers, and product managers; able to inspire and negotiate across disciplines. Location: Madrid, Spain

zooplusse is looking for a Senior AI Software Engineer to strengthen its team in Madrid. This position centers on the software development lifecycle (SDLC) for AI-driven products. Role overview This engineer will work closely with colleagues from different disciplines to create and implement AI algorithms. The focus is on building solutions that improve user experiences and contribute to business goals. Key responsibilities Take part in all phases of the SDLC for AI projects, from initial design through deployment. Work with cross-functional teams to define and deliver technical solutions. Develop and refine advanced algorithms for real-world applications. Location This role is based in Madrid.

At Groupon, we are a dynamic marketplace dedicated to connecting customers with unique local experiences and services. With over a million merchant partners worldwide, we empower local businesses to thrive in a landscape often dominated by e-commerce giants. Our commitment is to enhance local economies through performance-driven partnerships.We are undergoing a transformative journey that emphasizes results and innovation. Despite our global presence with thousands of employees, we foster a culture that encourages creativity, rewards boldness, and celebrates achievements. Here, your contributions can lead to immediate impact, blending the advantages of a large corporation with the autonomy typically found in smaller companies.We invite you to join our Marketing Engineering team as a Senior Systems Engineer (SRE III). In this pivotal role, you will design, implement, and manage robust email infrastructure and automation systems.Your expertise will be essential in developing email delivery platforms, system infrastructure, and automation pipelines that facilitate extensive customer communications. Collaborating with engineering and platform teams, you will ensure our systems are secure, highly available, and user-friendly.This position is perfect for individuals with a passion for infrastructure, a solid foundation in email systems and Linux, and a commitment to reliability, automation, and operational excellence.