Senior Back-End Software Engineer (Java) - Join Our Team in Barcelona

Role Overview haufegroup is hiring a Senior Software Engineer with strong Java experience for its Barcelona office. This role focuses on building and maintaining high-performance software that supports client requirements and drives product improvement. What You Will Do Design, develop, and maintain Java-based software solutions Work closely with cross-functional teams to enhance existing products Contribute to technical decisions and ongoing improvements Location This position is based in Barcelona.

About ExoticcaExoticca is an innovative online travel agency that is transforming the way people envision, create, and purchase unforgettable long-distance journeys. Our core mission revolves around the principle of 'creating life milestones.' We are dedicated to offering exceptional value trips, uncovering unique destinations, and curating extraordinary travel experiences, all while showing unwavering care for our customers and the environment.As a rapidly growing, professional, and multicultural team, we are eager to welcome new partners who share our vision in building the most progressive travel company of our generation.Your RoleWe invite you to become a proactive Senior Frontend Engineer who is passionate about crafting high-quality, maintainable code. You will leverage modern tools, including AI, to enhance productivity and efficiency. Your contributions will help us deliver superior frontend experiences, marrying robust engineering principles with a results-driven approach.Key Responsibilities:Develop and deliver high-quality frontend code that is clear, maintainable, and ready for production, guiding features from concept to deployment.Utilize AI-driven tools judiciously for tasks such as prototyping, refactoring, testing, and documentation to accelerate delivery without sacrificing code integrity.Engage in Growth experiments and iterations, facilitating rapid feedback cycles, A/B testing, and continuous enhancement.Collaborate closely with Backend, Product, and Design teams to ensure seamless interfaces, excellent user experiences, and collective accountability for results.Maintain a healthy codebase by refining existing components, addressing technical debt, and elevating quality standards where necessary.Mentor team members through code reviews and knowledge sharing, leading by example and fostering improvement in their skills.

Join our dynamic team at Vonage as a Software Engineer specializing in Java and Kotlin. You will be responsible for designing, developing, and maintaining robust software applications that enhance our communication services. We are looking for innovative thinkers who are passionate about technology and eager to contribute to cutting-edge projects.

We are seeking a passionate Software Engineer who will play a crucial role in ensuring the quality, development, and execution of our innovative software products as part of our dynamic global team.You will join a talented technology department consisting of a diverse group of professionals from various locations, including Barcelona, New York, London, Manchester, Bucharest, and India. If you’re eager to make a significant impact in a rapidly growing organization, we want to hear from you!About TransPerfect – TechOps:The TransPerfect TechOps team has been instrumental in the company’s success for over a decade, providing technology and services that have greatly simplified operations for our clients and internal teams. From enhancing workflows to developing core services for our GlobalLink platform, we strive to create scalable client interfaces that enable users to navigate complex ecosystems effortlessly.

Are you a skilled Senior QA Automation Engineer looking to make a significant impact in a fast-paced and innovative environment? At Shiji Group, we are dedicated to enhancing the hospitality and retail industries with cutting-edge technology. Join us in Barcelona to lead the charge in ensuring the highest quality of our software solutions!

Join our dynamic team as a Fullstack Engineer specializing in Java and Angular. In this role, you will be responsible for designing and implementing robust software solutions that enhance user experiences and meet our clients' needs. Collaborate with cross-functional teams to drive innovation and ensure the successful delivery of projects.

As a Senior Backend Software Engineer at Blacklane, you will join one of our autonomous agile teams. Your contributions will enhance the services that drive our innovative platform, improve our back-office systems, and address integration challenges that enable our business partners to seamlessly connect with Blacklane.Our tech stack comprises Ruby, Go, TypeScript, and Java services, designed through Domain-Driven Design (DDD). These services are deployed within our Kubernetes cluster and communicate via domain events using SQS and Kafka. We utilize a variety of data storage technologies, including PostgreSQL, MySQL, Elasticsearch, Redis, and DynamoDB. For infrastructure and cloud resources, we primarily leverage AWS, managing provisioning through Terraform.

Wizeline is a global digital services company that works with clients ranging from mid-size businesses to Fortune 500 enterprises. The team focuses on building and improving digital products and services, helping organizations strengthen their digital capabilities and modernize their core technology. Role overview This Senior Fullstack Software Engineer position is based in Barcelona. The role centers on solving complex technical challenges for clients, with an emphasis on human-centered digital experiences and integrating intelligence such as AI, machine learning, and data-driven solutions. Who we’re looking for Wizeline seeks candidates who are passionate about technology and eager to take on new challenges. A strong interest in developing digital solutions and working on innovative projects is important for this role.

Join our innovative team as a Senior Software Engineer, where you will be responsible for developing high-throughput services using technologies such as Node.js, TypeScript, Kotlin, or Java with frameworks like Spring Boot or Micronaut.You will leverage cutting-edge AI tools (e.g., GitHub Copilot, Cursor, Claude code) to streamline development processes and foster a culture of best practices within the team.Take ownership of the Software Development Life Cycle (SDLC) by utilizing Infrastructure as Code (IaC) with Terraform to implement blue-green deployments and manage preview environments.Engage in continuous performance tuning, profiling latency, cost, and overall system performance.Design and implement LLM-powered features and agents using LangChain or MCP-compliant frameworks, ensuring effective integration of retrieval, memory, and tool-use patterns.Promote clean code principles and domain-driven design while mentoring peers through constructive pull request reviews.Identify and propose solutions for scaling challenges, performance bottlenecks, and potential security vulnerabilities.

About the Role Affinity is hiring a Senior Software Engineer in Barcelona. This position focuses on designing, building, and maintaining software products that support the company's goals. The team values engineers who enjoy solving complex problems and contributing to ongoing projects.

About UsPerk Technologies, Inc. (formerly TravelPerk) is revolutionizing the landscape of travel and spend management with our cutting-edge platform. Our mission is to eliminate the tedious, manual tasks that hinder productivity, allowing businesses to focus on what truly matters. We automate processes related to travel bookings, expense management, invoice processing, and much more. By addressing the significant issue of shadow work that leads to lost hours and diminished morale, we empower employees to achieve their best work.Trusted by over 10,000 organizations globally, including industry leaders such as Wise, On Running, Breitling, and Fabletics, we are addressing a staggering productivity loss of 7 hours per employee each week, representing a $1.7 trillion challenge.Founded in 2015, Perk has rapidly expanded into a global entity with more than 1,800 employees distributed across 12 offices worldwide, with headquarters in London and Boston. We prioritize innovation, control, and simplicity to transform the working experience for businesses and their employees.At Perk, our values drive us. We believe in ownership, delivering a 7-star experience, and collaborating as one team. Our focus is on curiosity, purpose, and mindset, rather than just knowledge, to unlock your full potential. Our talent team is composed of top professionals from the travel and SaaS sectors, representing over 70 nationalities. If you are passionate about making a real impact and redefining how millions experience work, we would love to welcome you to our team.Visit www.perk.com to learn more.

Jobgether is hiring a Full-Stack Product Engineer based in Spain. This role focuses on building and improving products that support both user experience and business goals. Role overview As a Full-Stack Product Engineer, you will collaborate with team members to create new features and maintain existing applications. The position involves working across both front-end and back-end technologies, ensuring that products are reliable and user-friendly. What you will do Develop and maintain applications using a mix of front-end and back-end tools Work closely with colleagues to deliver features that improve the product Contribute to projects aimed at enhancing user experience and supporting business objectives Requirements Experience with both front-end and back-end development Ability to collaborate effectively within a team Interest in building products that make a difference for users and the business

Join our mission to revolutionize banking for everyone.Say farewell to the complexities of traditional banking.Initially starting as a prepaid card, our offerings have evolved significantly over the last decade in the UK. We now provide personal and business bank accounts, along with joint accounts, accounts for 16-17 year olds, a free kids account, and credit cards. Our UK customers can also save, invest, and manage their pensions with us, and we're excited to introduce even more innovative features soon.With our signature hot coral cards, an early access to salary feature, engaging financial education on social media, and our award-winning customer service, we consistently create memorable experiences for our customers!We aim to solve problems and transform lives through Monzo Barcelona, Spain | Competitive salary based on experience + stock options | Hybrid work model: 3 days a week in the officeAbout Our Engineering Teams:Our team consists of over 400 talented engineers who collaboratively design and build our proprietary banking platform. We have ambitious goals for the future, and technology is key to developing a bank that truly resonates with our customers. Engineers at Monzo work across various disciplines to tackle intriguing challenges, which span from user-facing products to critical infrastructure, security, payments, customer operations, financial crime, and data.We are committed to contributing to open-source software. To learn more about our work and culture, visit our blog.

Elevate Your Career with Zynga!At Zynga, we unite people through the joy of gaming. As a premier force in interactive entertainment and a distinguished label of Take-Two Interactive, our games have amassed over 6 billion downloads—bringing players from 175+ countries together through enjoyment, strategy, and a touch of friendly rivalry.Our exciting range of games includes everything from exhilarating casino experiences to grand strategy confrontations, challenging puzzles, and engaging social word games. Our beloved titles and recent releases encompass FarmVille™, Words With Friends™, Zynga Poker™, Game of Thrones Slots Casino™, Wizard of Oz Slots™, Hit it Rich! Slots™, Wonka Slots™, Top Eleven™, Toon Blast™, Empires & Puzzles™, Merge Dragons!™, CSR Racing™, Harry Potter: Puzzles & Spells™, Match Factory™, and Color Block Jam™—and many more!Founded in 2007 and headquartered in California, our teams stretch across North America, Europe, and Asia, collaboratively crafting unforgettable gaming adventures. Whether you’re strategizing, matching, or competing, Zynga is where entertainment converges with innovation—and where you can advance your career.Join us and immerse yourself in the world of play!Position Overview:We are in search of skilled software engineers to develop services for games that are cherished by millions of players daily worldwide. These services must be capable of scaling to accommodate high user traffic and be crafted with the utmost quality demanded by this competitive sector. We anticipate our developers to maintain cutting-edge technology while also contributing innovative ideas.What You’ll Do:Our backend applications utilize a variety of programming languages and technologies (Golang, PHP, AWS EC2, Kubernetes, etc.), so you should be enthusiastic about working with our legacy code, enhancing, maintaining, and continuously refactoring the backend of our games.Your role extends beyond just coding; you will collaborate with mobile developers, data analysts, and systems engineers to integrate your components, while also creating technical designs, documentation, and sharing knowledge, as well as training other team members.As a backend engineer, you will be integrated into our games team and work closely with game design, player experience, mobile, and other departments, participating in business decisions as part of our technology strategy.

Are you passionate about backend development? Join Delivery Hero as a Backend Engineer and be part of a dynamic team that drives innovation in the food delivery industry. In this role, you will design and implement scalable backend solutions, working with cutting-edge technologies to enhance our platform's performance. Collaborate with cross-functional teams to deliver high-quality software that meets the needs of our customers.

Join cint as a Senior Software Engineer and play a vital role in shaping the future of our technology. In this dynamic position, you will be responsible for designing, developing, and maintaining high-performance software systems that enhance our products and services.We are looking for a passionate individual with a strong foundation in software engineering principles who is eager to collaborate within a team-oriented environment. Your contributions will directly impact our innovative solutions and drive the success of our company.

Join us at Fever, the premier tech platform dedicated to enhancing cultural and live entertainment experiences globally.Our mission is to democratize access to culture and entertainment. Utilizing our advanced technology and data-driven strategies, we are changing how audiences engage with live events. Every month, over 300 million individuals across more than 40 countries discover unforgettable experiences on our platform, while we empower event creators to innovate and grow their reach.We proudly collaborate with industry giants such as Netflix, F.C. Barcelona, and Primavera Sound, delivering internationally acclaimed experiences and backed by leading global investors. Impressive, isn’t it?To further our mission, we seek exceptional talent with a proactive mindset, eager to contribute to the future of entertainment. Are you ready to be part of this journey?The engineering team is the backbone of our user-friendly iOS and Android applications and website, responsible for developing, enhancing, and maintaining all Fever services, ensuring that users have outstanding experiences.About the RolePosition: Senior Software Engineer (Backend Platform)Location: SpainWe are looking for a highly skilled software developer with a proven track record of delivering exceptional results. A person who values code quality and emphasizes doing things correctly, not just completing tasks.Collaborate within an agile, cross-functional team alongside other talented software engineers and product designers.Develop production-quality code and implement solutions capable of handling significant traffic.Mentor team members through code reviews, architecture design sessions, and pair programming.Receive mentorship from colleagues in areas where you seek to grow.During your onboarding period, you will:Engage in a structured program designed to facilitate a smooth transition into your role.

About Thunes Thunes is revolutionizing the global money transfer landscape with its innovative Direct Global Network, enabling seamless real-time payments across over 130 countries and 80 currencies. Our network offers direct connections to more than 7 billion mobile wallets and bank accounts globally, alongside access to 15 billion cards through over 320 different payment methods including GCash, M-Pesa, Airtel, MTN, Orange, JazzCash, Easypaisa, AliPay, WeChat Pay, and many more. Thunes uniquely stands out with its expansive reach, advanced SmartX Treasury System, and robust Fortress Compliance Platform, providing network members with unparalleled speed, control, visibility, protection, and cost-effectiveness for real-time payments worldwide. Our prestigious clientele includes industry leaders such as Uber, Deliveroo, Grab, and WeChat, along with various fintechs, MTOs, PSPs, and banks. Headquartered in Singapore, Thunes operates in 14 global locations including Barcelona, Abidjan, Beijing, Dubai, Hong Kong, Johannesburg, London, Manila, Nairobi, Paris, Riyadh, San Francisco, and Shanghai. For more details, please visit: https://www.thunes.com/ Role Overview We are seeking a passionate Senior Software Engineer (Golang) to join our dynamic Engineering team in Barcelona. This role offers an exciting opportunity to work in the fast-paced FinTech sector, collaborating on a variety of projects and technologies within an innovative environment. The Engineering team is tasked with developing our core business products and deploying them efficiently. We design solutions, tools, and platforms that address business needs, focusing on provisioning, configuration, CI/CD, monitoring, SLA, performance, and uptime. Our meticulous approach ensures we closely collaborate with diverse stakeholders while managing millions of transactions and integrating numerous global partners.

About ExoticcaExoticca is an innovative online travel agency that is transforming the way long-distance dream trips are conceived, produced, and sold online. Our brand is built around the mission of "creating life milestones," emphasizing our dedication to delivering exceptional travel experiences that offer the best value while caring for our customers and the planet. We take pride in our dynamic, multicultural team, which is rapidly expanding internationally and is eager to welcome partners who share our vision of building the most progressive travel company of our generation.What We Are Looking ForWe are in search of a Senior Software Engineer who excels as a problem solver. This role demands a versatile engineer who utilizes various technologies—backend, frontend, data, infrastructure, and AI—to address genuine customer and business challenges.You will play a pivotal role within our Customer Service optimization team, where we develop proactive and reactive solutions aimed at enhancing customer experiences on a large scale. Our mission is to anticipate customer issues before they arise and to simplify interactions through AI-driven self-service solutions when customers do reach out.While technology choices are important, the impact of your work is paramount. You will have the opportunity to work with PHP, C#, React, React Native, and modern AI tools, selecting the most effective solutions for each unique challenge without being limited to a single tech stack.Why Join Us?Engage with real, meaningful challenges that have a direct impact on customer satisfaction.Enjoy the autonomy to select the best tools for the task, including AI technologies.Collaborate with a team that prioritizes initiative, ownership, and meaningful contributions over titles and hierarchical structures.Contribute to scalable projects with opportunities to influence architecture, product development, and work methodologies.If you're seeking stimulating problems, independence, and opportunities for professional growth—welcome aboard! Key Responsibilities:Proactive Customer Experience:Develop features that foresee customer needs and alleviate potential friction points.Ensure critical information (e.g., flight details, trip modifications, and additional excursions) is clear, timely, and readily available across applications, websites, and communication channels.Create systems that minimize uncertainty and foster trust through intelligent automation and an intuitive user experience.Reactive & AI-Driven Automation:Assist in designing and building AI-driven chatbots and voicebots to enhance self-service and minimize manual support requirements.Automate customer communications regarding trip alterations (flights, accommodations, schedules).Apply AI strategically to classify, direct, resolve, or fully automate customer interactions.Product & Data-Oriented Engineering:Collaborate closely with the entire team to clearly define problems before writing code.