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Experience Level
Senior
Qualifications
Proven experience as a Full Stack Developer, with a strong focus on Java and Angular. Solid understanding of front-end technologies (HTML, CSS, JavaScript) and back-end frameworks. Experience with RESTful APIs and microservices architecture. Ability to work in an Agile development environment. Strong problem-solving skills and attention to detail. Excellent communication and teamwork abilities. Bachelor's degree in Computer Science or a related field is preferred.
About the job
About the Role
Miratech is hiring a Senior Full Stack Developer with strong experience in Java and Angular for its Seville team. This role focuses on building and improving solutions that support clients' business goals. Collaboration and hands-on problem solving are central to the work.
What You Will Do
Design and develop full stack applications using Java and Angular
Work closely with colleagues to deliver effective software solutions
Contribute to projects that help clients achieve success
Location
This position is based in Seville.
About Miratech
Miratech is a global technology services provider, committed to delivering cutting-edge solutions across various industries. With a strong emphasis on innovation and quality, we empower our clients to achieve their business goals through advanced technology and expert consulting.
Join Our Team as a Lead Backend Engineer At N26, we're redefining banking with a focus on innovation and technology. As a member of our Intelligent Operations Platforms (IOP) and Assistance segments, you will play a critical role in enhancing our operations and empowering other tech teams through a robust platform approach. We are looking for a skilled Lead …
Join Exoticca as a Senior Backend Software Engineer!About UsExoticca is a trailblazing online travel agency dedicated to transforming the way people experience long-distance travel. Our mission revolves around crafting memorable life experiences through exceptional travel adventures. We pride ourselves on offering unmatched value, exploring diverse destinations, and creating extraordinary travel journeys while prioritizing our customers and the environment.Our vibrant, multicultural team is expanding rapidly, and we are on the lookout for passionate individuals who can contribute to building a pioneering travel company that redefines the industry.Your RoleWe are seeking a Senior Backend Software Engineer who excels at problem-solving. You will leverage engineering as a powerful tool to address real-world customer and business challenges.This position falls within our Trip Management System domain, where you will empower our travel specialists to design remarkable journeys at scale. You will contribute to the systems that convert destinations, itineraries, flights, hotels, and pricing strategies into structured, market-ready travel products. Through seamless product configuration, accuracy, and scalability, your work will directly enhance revenue, operational excellence, and customer satisfaction.While technology choices are important, the impact of your work is paramount. You will engage with PHP, Node.js, and contemporary AI tools, selecting the optimal approach for each unique challenge without being limited to a single technology stack.Why Join Us?Engage with genuine, impactful challenges that enhance customer experiences.Enjoy the freedom to select the right tools, including advanced AI technologies.Work within a team that values initiative, ownership, and meaningful contributions over titles and bureaucracy.Face scale-up challenges with opportunities to influence architecture, products, and workflows.If you seek stimulating problems, autonomy, and opportunities for professional growth, we welcome you!
airapps is looking for a Backend DevOps Engineer based in Madrid. This position focuses on improving development workflows and supporting reliable application deployments. Role overview The Backend DevOps Engineer will work with both development and operations teams. The main goal is to make development processes smoother and ensure that applications are deployed efficiently. What you will do Collaborate with team members to implement continuous integration and continuous deployment (CI/CD) pipelines Manage and maintain cloud infrastructure Work to improve system performance and reliability Location This role is based in 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).
Why Join dLocal?At dLocal, we empower some of the largest companies globally to seamlessly collect payments across 40 countries within emerging markets. Our innovative solutions enhance conversion rates and simplify payment expansion, making us a trusted partner for global brands aiming to penetrate the world's fastest-growing markets.By becoming a part of our team, you will join an extraordinary global workforce of over 1000 professionals from more than 30 nationalities, fostering an international career that influences millions of lives daily. We are builders at heart, embracing challenges and placing our customers at the forefront of everything we do. If this resonates with you, we believe you will flourish in our dynamic environment.What Awaits You? We are in search of a highly proficient Java Specialist to enhance our Core department. In this pivotal role, you will be instrumental in designing and implementing architectural systems that underpin our current and future Java applications. Collaborating closely with the development team, your primary objective will be to ensure that solutions are efficient, scalable, and in alignment with client specifications. To excel in this position, you should possess extensive knowledge of software and architectural design patterns, coupled with advanced Java programming skills. A thorough understanding of the department's overarching requirements and goals is essential. By leveraging your expertise, you will contribute significantly to the ongoing enhancement of our technology stack and play a critical role in shaping the future of our department. Your strategic thinking and ability to grasp the bigger picture will be crucial to your success in this fast-paced and rewarding role.
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.
About UsConstructor is revolutionizing the ecommerce landscape with our next-generation search and discovery platform designed to enhance crucial metrics such as revenue, conversion rates, and profitability. Our proprietary search engine, developed entirely in-house, leverages advanced technologies like transformers and generative LLMs to deliver exceptional search experiences, personalized recommendations, and intelligent shopping agents. As the largest department within our organization, our engineering team is dedicated to maintaining the superiority of our technology, consistently outperforming competitors in A/B testing. Our platform is engineered for extreme scalability, handling over 1 billion queries daily across 150 languages and about 100 countries, serving major ecommerce players like Sephora, Under Armour, and Petco. We pride ourselves on our problem-solving capabilities and commitment to improving the experiences of both our customers and colleagues, fostering a culture centered on empathy, openness, curiosity, and continuous improvement. Founded in 2019 by Eli Finkelshteyn and Dan McCormick, Constructor is a U.S.-based company leading the charge in AI innovation.About the TeamThe Experiments team at Constructor is responsible for creating a robust experimentation platform that includes traffic allocation, exposure logging, metric computation, statistical analysis, and user interfaces for launching experiments and interpreting results. Our platform is designed for both internal use and by customers conducting experiments with live traffic, focusing on enhancing the speed, reliability, and interpretability of experiments. Unlike conventional experimentation tools, our platform must accommodate a diverse range of customer integrations, traffic patterns, and industry-specific constraints, presenting unique engineering challenges that have significant real-world implications.The RoleThis position primarily focuses on backend development (Python services and data-intensive systems). While you will occasionally engage with the Dash UI and contribute to Spark jobs, these areas are not the central focus of the role. We prioritize correctness, observability, and product usability over complex infrastructure.Technologies: Python, FastAPI, PostgreSQL, Plotly Dash, PySpark/Databricks, AWS, CloudWatch, Sentry. (Note: Spark-related work constitutes approximately 5–10% of the role — we do not expect you to be a data engineer or manage the data platform.)What You’ll DoDevelop and maintain backend services for experiment assignment, logging, and report generation.Enhance the scalability, performance, and reliability of experiment reporting pipelines.Implement product-facing features in the UI to assist users in launching experiments and analyzing results.
Role overview Jobgether seeks a Senior Backend Engineer to advance our B2B product development efforts in Spain. The focus is on building and maintaining backend systems that support solutions for business clients. What you will do Design, build, and maintain scalable backend systems tailored for B2B applications Collaborate with cross-functional teams to deliver secure and reliable APIs Take part in technical decisions aimed at improving system performance and stability Requirements Significant experience in backend development Deep understanding of API design, security, and scalability Ability to work collaboratively with colleagues from different disciplines Contract details This is a B2B contract role based in Spain.
At Datavant, we are revolutionizing healthcare data collaboration. Our mission is to ensure that health data is secure, accessible, and actionable for organizations throughout the healthcare landscape, including providers, health plans, researchers, and life sciences companies. From assisting single patients with their medical records to spearheading the AI transformation in healthcare, our team, known as Datavanters, is at the forefront of how data is interconnected and utilized to enhance health outcomes.Become a Part of Our Vision at the Datavant Life Sciences Tech Hub in BarcelonaAs we expand our global presence with the establishment of our Life Sciences Tech Hub in Barcelona, we invite skilled technical professionals who are product-focused and impact-oriented to join us in shaping the future of healthcare technology.Our Life Sciences technology is pivotal in clinical research, real-world evidence generation, pharmacovigilance, and data collaboration across the healthcare ecosystem. As a Backend Engineer at our Life Sciences Tech Hub, you will architect and implement systems that facilitate secure, privacy-conscious access to high-quality healthcare data utilized by pharmaceutical companies, biotech innovators, and research organizations globally. Your contributions will be integral in developing new therapies, expediting clinical trials, and enhancing patient outcomes by ensuring that essential data is interoperable, scalable, and reliable.Careers at Datavant empower you to leverage your technical acumen and problem-solving abilities in pursuit of our mission: to ensure that every healthcare decision is informed by the right data, at the right time, in the right format. We are on the lookout for innovators, problem-solvers, and proactive individuals ready to drive change and build upon our success.
Lead with impact, build with purposeJoin Betsson as a hands-on Senior Engineer and take the helm as the Team Lead for our dynamic Gaming Area. At Betsson Group, we are dedicated to revolutionizing Game Play and Game Discovery across all our brands and markets. Our mission is to deliver the finest gaming products and an exhilarating user experience for players on our platforms, encompassing game lobbies, gaming initiatives, provider integrations, and more.Key ResponsibilitiesYou will play a pivotal role in our Gaming platform, which is at the heart of our operations and essential to our company strategy. As we prepare to embark on our journey toward containerization, your expertise will enhance the scalability of our systems while ensuring top-notch quality. You will collaborate with a passionate team to build an industry-leading, scalable, multi-brand platform supporting over 25 online brands, utilized by hundreds of thousands of users worldwide.In summary, you will elevate our Gaming platform to new heights for a global audience!Your Role IncludesLeading a team of 7-8 engineers: motivating your team, participating in recruitment and onboarding, conducting performance reviews, and fostering personal development through 1-to-1 sessions.Engaging closely with Product Owners, Architects, and stakeholders to translate business requirements into actionable plans.Driving product development that aligns with business needs while implementing components in a modern software development environment (cloud platforms, microservices, etc.).Proactively contributing to solution development and process improvements.Participating in decision-making regarding application architecture design, solution development, and code reviews.Recommending technologies and approaches, discussing options with the team, and reaching consensus on technology choices.Collaborating in a cross-functional team where every member focuses on delivering exceptional results.
About the Project:Yei Finance is a pioneering decentralized, non-custodial money market protocol built on the Sei network, dedicated to delivering innovative and versatile financial solutions. Users can benefit from competitive yields, borrow via over-collateralized or flash loans, and manage risks using advanced tools—all while harnessing Sei’s remarkable speed and low costs.Our flagship product, Clovis, achieved over $400M in Total Value Locked (TVL) at its peak, generated $5.5M in protocol revenue over the past year, and has established itself as the largest protocol on Sei. Furthermore, we launched the first lending-boosted decentralized exchange (DEX) on Sei, where YeiSwap compounds YeiLend yields to drive over $230M in monthly trading volume and $147M in bridge flow. Clovis is set to expand this successful model by becoming multichain, positioning itself as the cross-chain prime brokerage layer for decentralized finance (DeFi).Who We Are:A dedicated team of builders from esteemed Web3 organizations, including AAVE, Wormhole, Venus Labs, OKX, among others.Supported by leading investors such as Outlier Ventures, Manifold, DWF Ventures, and the Sei Foundation.Collaborating with industry giants like Circle, OKX Wallet, Binance Wallet, Frax, Stargate, and more.The Opportunity:We are on the lookout for a highly skilled Senior Engineer to become part of our core development team and take charge of the design and implementation of our next-generation cross-chain lending protocol. This role will emphasize smart contract security and architecture, as well as the development of essential off-chain services that guarantee the protocol’s efficiency and strength.What You’ll Do:Design, develop, and refine DeFi protocols on EVM-compatible chains, prioritizing contract architecture, security, gas optimization, and upgradability.Create crucial backend and off-chain services using Go or Python, including monitoring systems, liquidation bots, and liquidity rebalancers.Address cross-chain integration challenges, ensuring atomicity, data consistency, and reliable asset bridging in an asynchronous environment.Rapidly iterate in an Agile environment and produce comprehensive documentation and system architecture diagrams.Who You Are:Startup-oriented: Thrives in a dynamic, fast-paced environment.
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.
neoris is looking for a Backend Software Engineer with a focus on .NET technologies to join the team in Madrid, Spain. This hybrid position involves both in-office and remote work. Role overview This role centers on designing, developing, and maintaining backend systems that support neoris applications. The work involves building reliable services and ensuring performance and scalability. Collaboration Work closely with colleagues from different disciplines to deliver software solutions that align with business objectives. Regular communication with cross-functional teams is part of the job. Location This is a hybrid role based in Madrid, Spain. Some days will be spent in the office, with flexibility for remote work.
ABOUT YOUWe are on the lookout for a dynamic Tech Lead who will take charge of the architecture, integration, and technical strategy for systems that connect Xsolla’s platform with various external backend gaming service providers. In this pivotal role, you will leverage your strong technical expertise and deep understanding of gaming backend ecosystems to craft scalable integration workflows across diverse platforms. You will lead a talented team in delivering impactful features that seamlessly unify services, enhancing the overall gaming experience.ABOUT USAt Xsolla, we are a leading global commerce company dedicated to providing developers with powerful tools and services to navigate the complexities of the video game industry. Serving everyone from indie developers to AAA studios, we partner with businesses to assist in funding, distributing, marketing, and monetizing their games. We believe in the future of video gaming and are committed to creating opportunities for creators by continuously expanding our resources. Headquartered in Los Angeles, California, Xsolla operates as the merchant of record and has empowered over 1,500 game developers worldwide to connect with more players and grow their businesses. With an array of profit avenues and winning strategies, we equip developers with everything they need to thrive in the gaming landscape.For further details, please visit xsolla.com.
Full-time|On-site|Barcelona, Catalunya [Cataluña], Spain
Join our dynamic global team as a Junior Backend Engineer where you will play a crucial role in ensuring the quality, development, and implementation of our software solutions.As part of our technology department, you will collaborate with a diverse group of accomplished professionals located around the world, including teams in Barcelona, New York, London, Manchester, Bucharest, and India. If you’re passionate about technology and keen to make a significant impact within a rapidly growing company, we would love to hear from you!Your Role in TransPerfect – TechOps:The TransPerfect TechOps team has been integral to our success over the past decade, providing innovative technology and services that greatly enhance the experiences of our clients and colleagues. From streamlining workflows for our staff to developing essential services that underpin our GlobalLink platform, our work enables users to navigate complex ecosystems effortlessly.
Join Our TeamAt Quadrivia, we are revolutionizing healthcare technology with Qu, a fully controllable and customizable AI assistant crafted by clinicians for clinicians. We tackle the pressing shortage of healthcare professionals by providing timely, personal, and dependable support for a variety of clinical tasks throughout the care continuum. Qu is tailored for healthcare providers, payers, and pharmaceutical companies, ensuring easy customization and seamless integration into existing workflows for optimal assistance across the care spectrum.Your ImpactAs a Senior Backend Software Engineer, you will architect and develop the robust backend systems that power the Quadrivia clinical AI platform. This includes building high-availability services, creating event-driven architectures, developing data pipelines, and establishing orchestration layers for our clinical AI agents.This position is highly technical and hands-on, playing a critical role in ensuring our systems' reliability, safety, and performance.
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
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.
jobgether is looking for a Backend Engineer based in Spain. This position centers on building and maintaining server-side applications that support the company’s products. Role overview The Backend Engineer will develop features and maintain the backend systems, focusing on performance and responsiveness. Collaboration with front-end developers is a key part of the job, integrating user-facing elements with server-side logic. The role also involves working to improve backend architecture for better scalability and reliability. What you will do Develop and maintain server-side applications Collaborate with front-end developers to connect user interfaces with backend systems Optimize backend architecture for scalability and reliability Ensure high performance and responsiveness to front-end requests
Veeva Systems is a purpose-driven organization and a leader in the industry cloud sector, empowering life sciences companies to expedite the delivery of therapies to patients. As one of the fastest-growing SaaS companies in history, we achieved over $2 billion in revenue in our last fiscal year and continue to see vast growth potential.Our core values at Veeva are: Do the Right Thing, Customer Success, Employee Success, and Speed. We are not just any public company; in 2021, we made history by becoming a public benefit corporation (PBC), which legally commits us to balancing the interests of customers, employees, society, and investors.As a Work Anywhere company, we offer flexibility for you to work from home or in the office, allowing you to thrive in your preferred environment.Join us in transforming the life sciences industry, as we commit to making a positive impact on our customers, employees, and communities.The RoleOpenData Clinical serves as the cornerstone for intelligent clinical operations.Patient recruitment remains the most significant challenge within the Clinical Trials industry. Delays in this process can postpone studies and, ultimately, delay the delivery of life-changing treatments to those in need. Our mission is to hasten this process.By identifying the most effective clinical sites, we facilitate quicker drug market entry. We project that OpenData Clinical will save at least one life annually through the optimization of Clinical Operations.You will be responsible for developing the backbone of our data quality engine and pipelines. Your contributions will enable thousands of curators to efficiently manage extensive datasets with accuracy, providing the life sciences industry with the high-quality data essential for accelerating clinical trials and drug development.This position is ideal for an engineer who prioritizes architectural integrity over quick fixes. You will be part of an engineering-driven culture that values technical excellence and grants true autonomy to innovate.
