Senior Fullstack Engineer at Aircall | Madrid

Managing expenses shouldn’t be a headache. At Pleo, we’re revolutionizing the way businesses handle spend management by creating solutions that simplify financial processes for both finance teams and employees. Our goal is to empower organizations to 'go beyond' traditional methods.Since our inception 10 years ago, we’ve embraced the philosophy of ‘Pleo’, meaning ‘more than you’d expect’, which has been pivotal to our success.We are currently at a significant juncture in our growth journey; every decision we make affects our more than 40,000 customers, our business, and our collective achievements. We are looking for individuals who take pride in identifying customer needs, transforming complex challenges into straightforward solutions, and respectfully challenging the status quo. With our ambitious goals ahead, we are a dynamic and diverse team of over 850 individuals from more than 100 nationalities, dedicated to shaping the future of business spending.About the RoleWe are seeking a skilled Backend Engineer to join our innovative team at Pleo. In this position, you will play a crucial role in building and scaling our backend systems, engaging in exciting projects as we expand our product and service offerings. If you are passionate about solving intricate technical challenges and thrive in a culture that values transparency, collaboration, and innovation, we invite you to apply.What You’ll Be DoingAs a Backend Engineer, your responsibilities will include:Designing, building, and maintaining scalable microservices primarily using Kotlin.Collaborating with cross-functional teams to develop innovative solutions across various domains such as Platform, Services, and SMB.Analyzing system performance and implementing optimizations to ensure high reliability and scalability.Participating in code reviews and post-mortems while mentoring fellow engineers.Proactively addressing technical debt and guiding the team through challenges and migrations.What You BringThis role is ideal for you if you possess:Experience in server-side languages, particularly Kotlin, along with expertise in distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Proficiency with relational databases such as PostgreSQL and familiarity with testing frameworks (e.g., JUnit, Testcontainers).

Managing corporate spending can often be a challenging endeavor, with convoluted processes that hinder efficiency for finance teams and employees. At Pleo, we are revolutionizing this process. We provide financial solutions designed to simplify money management, making it seamless and remarkably efficient for everyone involved. Our mission is to empower businesses to 'go beyond' traditional spending methods.The name 'Pleo' translates to 'more than you’d expect', and this philosophy has underpinned our success over the last decade.We find ourselves at a crucial juncture in our growth; every decision we make impacts over 40,000 customers and is vital to our mutual success. We seek individuals who are committed to understanding customer needs, transforming complex challenges into straightforward solutions, and questioning the status quo—all while aiming high. With ambitious goals propelling us forward, we embrace the journey of discovery and innovation. Our team consists of over 850 talented individuals representing more than 100 nationalities, all dedicated to shaping the future of business spending.About the RoleWe are in search of a Senior Backend Engineer to join our dynamic team at Pleo. In this role, you will play a key part in developing and scaling our backend systems while engaging in exciting projects as we enhance our product and service offerings. If you are passionate about tackling complex technical challenges and thrive in a culture that prioritizes transparency, collaboration, and innovation, this position is made for you.Your ResponsibilitiesAs a Senior Backend Engineer, you will:Lead the design, development, and maintenance of scalable microservices primarily using Kotlin.Collaborate with cross-functional teams to create innovative solutions across various domains including Platform and Services.Analyze system performance and implement optimizations to ensure high reliability and scalability.Participate in code reviews, conduct post-mortems, and mentor fellow engineers.Proactively address technical debt and guide the team through technical challenges and migrations.QualificationsYou will excel in this role if you possess:Strong expertise in server-side programming, particularly in Kotlin, and experience with distributed systems, microservices, and various cloud environments such as AWS and Kubernetes.Proficiency in relational databases such as PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.

Managing expenditures can be a complex and cumbersome task, but at Pleo, we're revolutionizing this space. Our innovative spend management solutions empower finance teams and employees to handle their finances effortlessly and effectively. With a mission to help businesses 'go beyond', we strive to simplify the way money is managed.Over the past decade, our mantra 'Pleo'—meaning 'more than you’d expect'—has driven our success and innovation.As we continue to expand our reach to over 40,000 customers, we seek individuals who are passionate about identifying customer needs, simplifying complex challenges, and ambitiously pursuing excellence. Join our diverse team of 850+ exceptional individuals from more than 100 nationalities, all committed to shaping the future of business spending.About the RoleWe are excited to invite a skilled Backend Engineer to our team at Pleo. In this pivotal role, you will contribute to the design and scalability of our backend systems while taking part in exciting projects as we enhance our product and service offerings. If you have a passion for tackling complex technical challenges and desire to work in an environment that values transparency, collaboration, and a strong commitment to innovation, this opportunity is for you.Your ResponsibilitiesAs a Backend Engineer, you will:Design, develop, and maintain scalable microservices primarily using Kotlin.Collaborate with cross-functional teams to create innovative solutions across various domains, including Platform, Services, and SMB.Evaluate system performance and implement optimizations to ensure reliability and scalability.Engage in code reviews, conduct post-mortems, and mentor junior engineers.Proactively manage technical debt and navigate the team through technical challenges and transitions.Your QualificationsTo excel in this role, you should possess:Proven experience in server-side programming languages, particularly Kotlin, alongside expertise in distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Strong proficiency with relational databases such as PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.

At Pleo, we are revolutionizing spend management, transforming tedious processes into seamless solutions that empower both finance teams and employees. Our mission is to enable businesses to 'go beyond' in managing their finances effectively.With a decade of innovation under our belt, we embody the essence of our name, which means 'more than you'd expect.' Every decision we make impacts our 40,000+ customers and fuels our growth. We seek individuals who are passionate about understanding customer needs, simplifying complex problems, and challenging the status quo with respect. Join our diverse and ambitious team of over 850 professionals from more than 100 nationalities, united in our goal to redefine business spending.About the RoleWe are on the lookout for a Senior Frontend Engineer to join our Accounting Experience (AX) team. In this pivotal role, you will be instrumental in crafting reliable and high-quality accounting experiences, ensuring the accuracy and usability of our exporting, reporting, and accounting setup flows. If you thrive on managing complex user journeys from start to finish, collaborating closely with product and backend teams, and elevating quality standards in a critical domain, we want to hear from you.What You’ll Be DoingAs a Senior Frontend Engineer, your responsibilities will include:Overseeing the end-to-end delivery of frontend tasks in finance-critical processes such as reporting, exports, and accounting setup, from initial discovery through to release and follow-up.Leading frontend architectural decisions for complex stateful experiences, including asynchronous job flows, progress tracking, and error handling.Collaborating with backend engineers to establish clear contracts that enhance UI resilience and supportability in production.Enhancing quality through pragmatic testing practices, predictable state management, and maintaining strong pull request hygiene to minimize regressions and rework.Working closely with product managers, designers, and domain experts to validate edge cases and semantics early in the development process.Mentoring fellow engineers by sharing best practices, providing contextual code reviews, and facilitating a culture where the “right way” becomes the easiest path forward.

Managing expenses can often be chaotic and cumbersome, creating challenges not only for finance teams but for every individual involved. At Pleo, we are on a mission to revolutionize this experience. Our innovative spend management solutions streamline financial processes, making them efficient, empowering, and surprisingly effective for both finance teams and employees—our goal is to help businesses 'go beyond'.The name 'Pleo' translates to 'more than you’d expect', and living by this principle has been our key to success over the past decade.We are currently at a crucial stage in our evolution; every action we take has a significant impact on our 40,000+ clients, our business trajectory, and our shared success. We seek individuals who take pride in identifying customer needs, transforming complex challenges into straightforward solutions, respectfully questioning established methods, and aspiring to achieve greatness. With ambitious goals propelling us forward, we acknowledge that we haven't mastered everything yet—and that’s part of the excitement! We are a dedicated, forward-thinking, and importantly, kind team of over 850 individuals from more than 100 nationalities, all committed to shaping the future of business spending together.About the RoleWe are in search of a Senior Software Engineer to become a key member of our Demo Experience Platform team at Pleo. In this role, you will empower various internal customers and stakeholders to engage with, test, and demonstrate Pleo through our demo and sandbox environments, contributing to Pleo’s Platform organization. If you are enthusiastic about enhancing our sales demo experience, boosting our sales conversion rates, streamlining our product development processes, or facilitating seamless integrations within our API ecosystem, this opportunity is tailored for you!You will report to our Senior Engineering Manager and collaborate closely with teams across multiple departments, particularly in Go-to-market, to drive success. Our tightly-knit team of four is highly collaborative and committed to optimizing the demo experience for Pleo.Key ResponsibilitiesAs a Senior Software Engineer in our Demo Experience team, you will:Lead initiatives to design, develop, and maintain innovative solutions that enhance efficiency across various departments.Collaborate with cross-functional teams to identify improvement opportunities for demo, sandbox, and testing account experiences.Engage in code reviews, conduct post-mortems, and provide mentorship to fellow engineers.Proactively tackle technical debt while guiding the team through technical challenges and migrations.Contribute to the execution, delivery, and quality assurance of projects.

Join Aircall, a unicorn and AI-driven customer communications platform, serving over 22,000 companies globally. We are innovating the way businesses communicate by seamlessly integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our growth stems from a straightforward principle: empower teams to work more efficiently. Our AI Voice Agent automates routine calls, AI Assist enhances post-call tasks, and AI Assist Pro provides real-time support, enabling individuals to excel in their roles. This leads to increased revenue, quicker resolutions, and confident team scalability.With headquarters in Paris and a robust North American presence in Seattle, alongside teams in Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City, we have developed a beloved product and a rapidly expanding business, supported by top-tier investors and driven by swift AI advancements across various product lines.At Aircall, you will be part of a dynamic organization. We are ambitious, focused on product excellence, and committed to execution, ensuring visible impacts, quick decisions, and genuine growth.Our Work Culture: We are deeply customer-focused, data-informed, and dedicated to delivering significant outcomes. We prioritize ownership, ongoing learning, and a thoughtful pace. If you thrive in a collaborative, fast-paced setting where trust and impact are key, you will feel right at home here.Role Overview:As a Senior Backend Software Engineer, you will play a crucial role in designing, developing, deploying, and maintaining essential features that enhance customer value through voice integration.You will be expected to advocate for best practices and provide mentorship within your team and across the engineering department.We are driven by quality, excellence, and agility, and you will contribute to elevating these standards.Utilizing a diverse range of backend technology stacks, tailored to meet specific needs and consistently hosted on AWS, we create resilient services that add value to voice integration and seamlessly connect with our clients' critical business tools such as CRM, Helpdesk, E-Commerce, and more.

Role Overview airapps is hiring a Backend QA Engineer based in Madrid. This position focuses on quality assurance for backend systems, helping to keep applications reliable and up to standard. What You Will Do Support QA processes for backend applications Work closely with team members to identify and resolve issues Help ensure applications perform as intended and meet quality expectations Who We’re Looking For Detail-oriented approach to testing and problem-solving Comfortable working within a collaborative team Motivated to deliver solid, dependable software Location This role is based in Madrid.

As a Senior Backend/Platform Engineer at causaprima, you will be responsible for the foundational platform utilized by our agents. Your expertise will enhance our event-driven architecture, streamline data pipelines, integrate with customer accounting systems, and ensure that our infrastructure is reliable, auditable, and efficient.Key ResponsibilitiesEvent Store Management — Design and maintain an append-only PostgreSQL database featuring tamper-evident hash chaining, real-time event distribution, agent replay, recovery capabilities, and schema versioning.Cryptographic Signature Infrastructure — Establish key management and signature verification systems for all agent events while implementing approval chains for external actions.Workflow Constraint Engine — Develop a gateway to verify authorization for any external actions including emails, payments, or API calls.PII Vault & GDPR Compliance — Create isolated, encrypted storage solutions for personal data, ensuring compliance with the right to erasure and data residency requirements.Multi-Tenancy Management — Implement row-level security and tenant isolation across all data stores, including tenant-scoped LLM API keys.Authorization Framework (Cerbos) — Utilize attribute-based access control for both agents and humans, ensuring deterministic policy evaluation where LLMs do not make authorization decisions.MCP Security Layer — Develop authentication, capability-based scoping per partner, and rate limiting for the Model Context Protocol endpoint.Database Architecture — Focus on PostgreSQL schema design, indexing strategies, performance tuning, and read replica topology.

About the Role airapps is looking for a Backend Engineer in Madrid to help shape the systems behind our platforms. This role centers on building and improving backend architecture that supports our applications. What You Will Do Design, implement, and maintain scalable backend systems Work closely with teams across the company to deliver new features and solutions Contribute to the ongoing improvement of our backend platforms Location This position is based in Madrid.

Join the Digital Revolution!At Aleph, we are not just participating in the digital advertising landscape; we are actively shaping its future. As representatives of the world’s leading platforms, including TikTok, Amazon, Google, and nearly 55 others, we operate across 130+ markets worldwide.Our mission is to empower advertisers and brands to harness the full potential of these platforms' advertising capabilities. By nurturing long-term partnerships, we create limitless opportunities for businesses to advertise effectively at both local and global levels.With a presence spanning multiple continents, Aleph offers you the opportunity to join a rapidly growing and innovative team where your contributions will have a direct impact. If you are ambitious, forward-thinking, and eager to thrive in a dynamic global environment, Aleph is the ideal place to advance your career.We are looking for a talented Senior Backend Developer who excels in designing, building, and maintaining high-throughput, event-driven systems. In this pivotal role, you will be instrumental in shaping our core platform, making vital architectural decisions, and mentoring fellow engineers. Your responsibilities will include ensuring reliable communication between our asynchronous services, facilitating seamless data flows, and enabling our entire ecosystem to scale according to demand. If you are passionate about message queues, stream processing, and the intricacies of distributed systems, we invite you to apply for this exciting opportunity.

Join Aircall as a Senior Backend/Platform Engineer, where you will play a crucial role in enhancing our platform's infrastructure and backend systems. You will collaborate with cross-functional teams to design and implement scalable solutions that ensure seamless communication for our users. If you are passionate about crafting high-performance systems and thrive in a dynamic environment, we would love to hear from you!

Join Pleo as a RevOps Performance Analyst, where you will play a pivotal role in optimizing our revenue operations. You will analyze performance metrics, identify trends, and provide actionable insights that help drive strategic decisions. Collaborate with cross-functional teams to enhance operational efficiency and support our rapid growth. Your analytical skills and attention to detail will be critical in shaping our business strategies.

Managing business expenses shouldn't feel complicated. At Pleo, we are transforming spend management into a streamlined and empowering process for finance teams and employees alike, allowing businesses to truly ‘go beyond’.The name ‘Pleo’ embodies our philosophy of delivering ‘more than you’d expect,’ which has fueled our success over the past decade.As we continue to grow, each decision we make significantly impacts our 40,000+ customers and our overall success. We seek individuals who take pride in identifying customer needs, simplifying complex problems, and challenging the status quo with respect. With ambitious goals ahead, we recognize that our journey is filled with learning opportunities. Our team comprises over 850 dedicated professionals from more than 100 nationalities, all sharing a commitment to revolutionizing business spending.At Pleo, we aim to redefine spend management through our innovative product used by thousands of companies across Europe, with our web application being a crucial aspect of this mission.We are looking for a Staff Engineer to join our Web Core team, responsible for enabling product engineers to develop and deliver high-quality web software. Our team oversees the foundational elements of the web stack, including tooling, architecture, and developer workflow reliability, collaborating closely with product teams to enhance delivery speed, safety, and consistency.About the Web Core TeamDevelop and maintain a robust web platform that empowers teams to deliver exceptional web experiences.Promote technical excellence across Pleo’s web applications, focusing on architecture, performance, and accessibility.Enhance the developer experience via improved tooling, continuous integration reliability, and rapid feedback mechanisms.Manage shared web foundations, fostering adoption of libraries and best practices.Engage with and contribute to the wider frontend community at Pleo.Your RoleAs a Staff Engineer in Web Core, you will act as a force multiplier, working across teams to eliminate obstacles and elevate the standards of our web software development.

Groupon is a dynamic marketplace that connects customers with exciting experiences and services, empowering local businesses to thrive. Having partnered with over a million merchants worldwide, we facilitate connections for 16 million customers seeking deals across diverse categories. In a world dominated by e-commerce giants, we pride ourselves on being a platform genuinely committed to the success of local businesses through performance-driven strategies.At Groupon, we are on an ambitious journey to transform our operations with a relentless focus on achieving results. Despite our global presence with thousands of employees, we uphold a culture that fosters innovation, encourages risk-taking, and celebrates success. Here, your impact can be immediate, as we operate on a scale that allows for rapid transformation. We embody a "best of both worlds" philosophy—large enough to offer robust resources, yet small enough for individuals to wield significant autonomy and make a meaningful impact.About the RoleJoin our CoreApps Platform team, the backbone of Groupon's engineering efforts responsible for the global commerce engine. Our platform manages every customer interaction and transaction on a worldwide scale. In this high-impact, senior-level Individual Contributor (IC) role, you will focus on ensuring KTLO stability at massive scale while advancing a significant platform modernization initiative through an AI-first approach.You will take ownership of mission-critical services that handle over 100,000 Requests Per Minute (RPM) and drive the transition from legacy Java/Ruby systems to a modern TypeScript/Node.js microservices architecture, utilizing cutting-edge AI coding tools to achieve unmatched speed and quality.

Managing expenses doesn't have to be a complicated task. At Pleo, we're revolutionizing spend management to create seamless, empowering solutions for finance teams and employees alike. We envision a world where businesses can truly 'go beyond' traditional finance practices.The name ‘Pleo’ means ‘more than you’d expect’, and embodying this philosophy has driven our success for over ten years.We're at a crucial stage in our journey; every decision we make influences our 40,000+ customers and our overall success. We seek individuals who take pride in identifying customer needs, transforming complex challenges into straightforward solutions, and questioning the status quo (with respect). Our ambitions are high, and while we haven’t figured everything out yet, that’s part of the excitement! Join our diverse team of over 850 professionals from more than 100 nationalities, all dedicated to shaping the future of business spending.About the RoleWe are in search of an Engineering Manager to lead our Employee Spend & Mobile Segment at Pleo. This pivotal role positions you at the forefront of our technical innovation. You will manage one or two squads with up to 12 direct reports, collaborating closely with Product Managers and Designers.You will report to the engineering lead of our segment, spearheading our mobile app initiatives and enhancing Pleo's end-user features. You’ll also have opportunities to collaborate with teams across Pleo to ensure our success.Your Leadership StyleWe believe in hiring individuals who we would want as our leaders, regardless of their current role.We value leaders who genuinely care about their team members as individuals, emphasizing authentic leadership.Your ability to demonstrate vulnerability, transparency, and a willingness to listen will be critical.We envision an engineering manager whose team will proudly celebrate successes together, rather than feeling left behind.Your guidance will help your team navigate challenges effectively...

Join our dynamic team at zooplusse as a Senior DevOps Engineer. In this pivotal role, you will leverage your expertise to enhance our deployment processes, automate workflows, and improve system reliability. Your contributions will directly impact our product development and technology initiatives, working closely with cross-functional teams to drive innovation.

jobandtalent is looking for a Senior Analytics Engineer to join the team in Madrid. This position centers on using data analytics to support business decisions and strengthen the company’s data infrastructure. Role overview The Senior Analytics Engineer will work with complex data sets, translating them into clear, actionable insights. The role involves collaborating with colleagues to ensure data is accessible, accurate, and ready to inform key decisions across the business. What you will do Develop and maintain data models and analytics tools Transform raw data into meaningful reports and dashboards Work closely with stakeholders to understand data needs and deliver useful solutions Requirements Strong experience in data analytics and engineering Ability to work with complex data and communicate findings clearly Comfortable working in a collaborative, evolving environment

Are you passionate about leveraging AI technologies to enhance backend systems? Join docplanner as a Backend Engineer specializing in AI Integration. In this role, you will collaborate with a dynamic team to design, develop, and implement innovative solutions that integrate AI capabilities into our existing systems.Your expertise will contribute to optimizing processes and improving user experiences across our platforms. If you're ready to take your backend engineering skills to the next level while working with cutting-edge technology, we want to hear from you!

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.