Senior Software Engineer - Payments

Join our dynamic team at doco1 as a Senior Software Developer. This on-site role in vibrant Madrid offers a unique opportunity to work on cutting-edge software solutions in a collaborative environment. You will be responsible for designing, developing, and maintaining high-quality software applications, contributing to all phases of the software development life cycle.

Who You Are:You are a dedicated and customer-oriented developer who thrives on enhancing user experiences through data-driven solutions. Your enthusiasm for diagnosing and resolving production challenges drives you to proactively identify and eliminate issues.Your expertise encompasses cloud technologies, automation, infrastructure as code, networking, and microservices. You possess strong programming skills in Python, Java, or Go, with a keen desire to expand your knowledge further.You demonstrate a solid understanding of software engineering principles throughout the software development lifecycle, including coding standards, code reviews, security protocols, source control, build processes, automated testing, deployment, monitoring, chaos engineering, and self-healing operations. You are proficient with tools and technologies such as CloudFormation, Terraform, New Relic, AWS Lambda, Serverless architecture, Elasticsearch, Docker, Kubernetes, Spark, Flink, Jenkins, GitHub, Artifactory, and Jira.Your strong analytical and problem-solving skills, combined with effective verbal and written communication, enable you to lead production incident responses and postmortems successfully.What to Expect as a Member of the SRE Team at WatchGuard:The SRE team at WatchGuard is responsible for ensuring the reliability and security of our production cloud environments, collaborating closely with application development teams to deliver exceptional customer experiences. As you familiarize yourself with our systems, your responsibilities will include:Collaborating with development teams to ensure seamless production operations and managing large-scale event responses.Establishing operational and security policies, standards, and processes for development teams.Assisting development teams in defining, monitoring, and achieving their service level agreements through well-defined service level indicators and objectives.A Typical Day in the Life of a Site Reliability Developer on the SRE Team at WatchGuard:As a Site Reliability Developer at WatchGuard, your daily activities might involve:Working collaboratively with application teams in production environments across AWS, Azure, and hybrid cloud infrastructures to ensure effective monitoring, security, reliability, automation, and support.Promoting a culture of operational excellence through simplification, automation, analysis, and process evolution.Advocating for security and operational best practices to establish your reputation as a cloud expert among our diverse global development teams.Striving for the best possible customer experience, even during challenges, by actively participating in incident management and resolution efforts.

Join atexis as a Software Developer and be a vital part of our innovative team. You will work on exciting projects, leveraging the latest technologies to create high-quality software solutions. We are looking for passionate developers who thrive in a collaborative environment and are eager to contribute their skills to impactful projects.

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.

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.

Role Overview JetBrains is looking for a Senior Fullstack Developer to focus on AIR Automations. This role involves working closely with a skilled team to build and improve automation solutions. The position calls for strong experience in both frontend and backend development to create reliable applications that support customer workflows. Location Options include Belgrade, Berlin, Madrid, Munich, Prague, or remote within Germany.

Join our dynamic team at Sopra Steria as a Senior Developer in Madrid! We are looking for an innovative and experienced professional to contribute to our exciting projects in a collaborative environment. In this role, you will leverage your technical skills to deliver high-quality software solutions while mentoring junior developers.

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.

Who we are:Geotab® is a global leader in IoT and connected transportation, recognized as a certified “Great Place to Work™.” Our diverse and talented team collaborates to empower businesses, enhance community safety, and promote sustainability.At Geotab, we are at the forefront of security and fleet management, connecting commercial vehicles to the internet and delivering advanced web-based analytics. Our open platform, along with Geotab Marketplace®, offers diverse third-party solutions, enabling businesses of all sizes to streamline operations by integrating vehicle data with other assets. With billions of data points processed daily, we leverage data analytics and machine learning to boost productivity, reduce fuel consumption, enhance driver safety, and ensure compliance with regulatory changes.We are expanding our team and seeking passionate individuals who think outside the box and desire to make a significant impact. Our dynamic environment presents challenges that require adaptability and willingness to embrace new tasks, even those not outlined in the job description. Join us for a rewarding career filled with opportunities for innovation, excellent benefits, and a fun, inclusive work culture. Discover what it means to be a part of Geotab by visiting our blog and following us on Instagram. Join our talent network to learn more about career opportunities.

zooplusse is seeking a Senior AI Engineer in Madrid with a focus on the Software Development Life Cycle (SDLC). This position centers on designing and implementing AI solutions that support both product development and operational efficiency. Role overview This role involves leading efforts to improve system architecture and optimize machine learning models. Collaboration with teams from different disciplines is a key part of the work, as projects often span multiple areas of the company. What you will do Design and implement AI-driven solutions for software development and operations Collaborate with cross-functional teams to refine system architecture Work on optimizing machine learning models to enhance performance Who we are looking for The ideal candidate brings deep experience in artificial intelligence and a strong background in software development. Leadership in technical projects and a drive to advance technology are important qualities for this role.

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

Join our dynamic team at Sigma Software Group as a Senior TypeScript/Node.js Developer. We are seeking an innovative and experienced developer to contribute to our cutting-edge Swedish ad platform. You will work collaboratively with a talented group of professionals, enhancing our technology stack and delivering high-quality software solutions.

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.

Greetings! We are Fever, the leading technology platform for culture and live entertainment globally. Our mission? To make culture and entertainment accessible to all. Leveraging our proprietary technology and data-driven insights, we are transforming the way individuals engage with live events. Each month, our platform captivates over 300 million people across more than 40 countries, enabling them to discover extraordinary experiences while empowering event creators to scale, innovate, and connect with new audiences. Our achievements? We've partnered with industry giants like Netflix, F.C. Barcelona, and Primavera Sound, presented award-winning experiences internationally, and received backing from top global investors! Quite impressive, isn't it?To fulfill our mission, we seek proactive individuals with a hands-on approach, excited to influence the future of entertainment! Are you ready to be part of this journey? ROLE OVERVIEW The Experience Site Manager will oversee the complete management of our experience site in Madrid, showcasing unique events within a single venue. You will be the business leader responsible for ensuring exceptional operational efficiency, outstanding customer service, and financial viability. Located in Madrid, you will collaborate with the local Management Team and report directly to the Fever Originals Local Team. You will lead daily operational decisions and drive continuous budget and operational enhancements. Additionally, you will work on strengthening the brand within the local community through partnerships and private events. This position demands an action-oriented individual who is ready to take ownership of the site while adhering to the policies and procedures established by our Corporate Team and Production Partners. VIRTUAL REALITY EXPERIENCES Our VR experiences offer a chance to step back in time and explore scenes from history, uncovering hidden parts of the world or lost civilizations. Visitors equipped with virtual reality headsets will embark on a journey into a unique universe that is both enriching and entertaining.

Role overview Nexthink is looking for a Senior Site Reliability Engineer in Madrid to help strengthen the reliability and performance of our systems. This role works closely with engineering teams to build and support scalable infrastructure. Automation and process improvement are key parts of the work, all aimed at delivering a smooth user experience.

Nexthink is seeking a talented Java Engineer who possesses a strong passion for learning and innovation. If you are someone who enjoys challenging the status quo and is eager to enhance your skills, you will be a perfect fit for our dynamic team. We are focused on pushing the boundaries of digital employee experience, and we need your expertise to help us lead the way.As a motivated, results-oriented, and detail-focused individual with a sense of product ownership, you will thrive in our collaborative environment. This is a unique opportunity to join a fast-paced, Silicon Valley-like unicorn company, and we are excited to meet you!In this role, you will be responsible for designing, building, and delivering robust and scalable distributed services that process billions of events, utilizing modern cloud-native features and techniques. Your contributions will enhance the reliability and efficiency of our platforms, directly influencing our product and engineering DevOps practices to ensure high system availability, scalability, and performance.

Join our innovative team at Sopra Steria as a Senior Java Developer! In this pivotal role, you will be responsible for developing high-quality software solutions, optimizing application performance, and collaborating with cross-functional teams to deliver exceptional results. Your expertise in Java will be key to driving our projects forward.