Senior Backend Java Engineer

At SEON, we are the pioneers in fraud prevention and AML compliance, empowering thousands of enterprises globally to combat fraud, mitigate risks, and safeguard their revenue streams. Utilizing over 900 real-time, first-party data signals, we enhance customer profiles, identify suspicious activities, and optimize compliance processes—all from a single platform. SEON offers unparalleled data richness, versatile and transparent analyses, and a swift path to value that surpasses any competitor in the industry. Our innovative approach has enabled clients to decrease fraud by 95% and achieve a remarkable 32x return on investment. We are rapidly expanding, fueled by collaborations with some of the most forward-thinking digital brands like Revolut, Wise, and Bilt.As a FullStack Java Engineer at SEON, you will leverage your robust software engineering skills while adopting a mentoring role to empower your peers and collaborate closely with our engineering leadership. We are committed to a product-led growth strategy.Join our Scoring Team, the core of SEON, where we aggregate data to provide our clients with the tools needed to block fraudulent activities. We are in a constant state of evolution, adding new data sources to refine our sophisticated real-time analyses and enhancing user experience to bolster their fraud prevention capabilities. This role encompasses vital product functions including backend and frontend development, research and development, design, and database management.This position offers flexibility with a hybrid working schedule based in Budapest.

Join us at the forefront of revolutionizing global capital markets! At ion, we provide cutting-edge analytics, news, and data solutions that empower millions of professionals worldwide. Our clientele includes influential investors, lawyers, consultants, traders, bankers, and executives, and we are dedicated to transforming their workflows through innovative technology. By becoming part of our team, you will engage in a culture that prioritizes continuous improvement and lifelong learning. Discover more about this exciting opportunity below.

Join our innovative team at Betsson as a Fullstack Software Engineer specializing in Player Management. In this dynamic role, you'll leverage your extensive experience in agile development practices while collaborating closely with cross-functional teams and product owners. Your expertise in designing and implementing end-to-end technical solutions will be key in shaping our player account management systems, with a strong focus on utilizing AI tools and services to optimize our development processes.The WowOur Product Development organization operates across five locations, hosting some of the most creative talent in the iGaming industry. If you thrive on cutting-edge technologies and relish the challenge of mission-critical responsibilities, this is the perfect opportunity for you!In a highly competitive market, we prioritize the adoption of the latest technologies to ensure exceptional performance, functionality, and user experience. You will be instrumental in building an industry-leading, scalable, multi-brand platform that supports over 40 brands, catering to hundreds of thousands of users.What's in it for you?The Player Account Management (PAM) area encompasses various aspects of managing player accounts, including:Account creation, verification, updates, and closureAccount authentication, controls, and securityUser session managementResponsible Gaming initiativesA taste of what you will be doingDesign, develop, and maintain scalable fullstack applications using .NET (preferably .NET 9) and Angular.Integrate and manage messaging systems such as Kafka and RabbitMQ.Deploy and manage applications using Docker and Kubernetes in AWS environments.Work with various databases including PostgreSQL, MSSQL, and Couchbase.Implement search capabilities using OpenSearch or Elasticsearch.Write and maintain frontend code using TypeScript, ensuring quality with Playwright or Cypress.Collaborate closely with team members and product owners in an agile environment to meet organizational goals.Utilize AI tools and services to enhance workflows and productivity.

Role overview Wise is looking for a Senior Software Engineer to join the Europe Money Movement team in Budapest. This team builds and maintains features that help people move money across Europe efficiently and securely. What you will do Design and implement features for financial transactions using Java Collaborate closely with teammates to improve and scale Wise’s money movement platform Contribute to Wise’s mission to lower the cost of international money transfers Tech stack Java is the primary language for this role.

Wise is looking for a Senior Fullstack Engineer to help develop and improve the Mitigation Handling Platform in Budapest. This position involves working across both front-end and back-end systems to deliver reliable, scalable applications that support a smooth user experience. What you will do Build and maintain applications that keep the platform efficient and responsive. Work with cross-functional teams to design and implement new features and solutions. Contribute to both user-facing and server-side components, ensuring a seamless experience. Role overview This role focuses on creating technology that helps Wise respond quickly to user needs. Collaboration and technical skill will be central as you work with others to deliver improvements and maintain high standards for reliability.

Role overview Deutsche Telekom IT Solutions seeks a Senior Java Developer based in Budapest. The position centers on designing and building software that addresses client requirements. Daily work involves regular collaboration with colleagues from various specialties. What you will do Design and develop software solutions using Java Partner with team members from different backgrounds and departments Follow established software development methods Deliver reliable solutions that meet defined quality standards

Join Wise as a Backend Software Engineer specialized in SWIFT, where you will play a pivotal role in developing and enhancing our financial services. You will work with cutting-edge technologies and collaborate with a talented team to deliver innovative solutions that empower people to manage their finances more effectively. This is an exciting opportunity to contribute to a company that values transparency and efficiency in the world of money transfer.

Role overview Wise is looking for a Senior Java Engineer in Budapest to help build and improve the platform. This role focuses on creating scalable, efficient solutions that support Wise’s products and services. What you will do Develop and maintain Java-based software for the Wise platform Work closely with teams across engineering, product, and other functions Contribute to the design and delivery of reliable, high-quality features Support ongoing improvements in system performance and scalability

Join our dynamic team at Hawkeye Innovations as a Senior Java Engineer specializing in our Data Platform Framework. In this role, you will drive the development of scalable and efficient data solutions, collaborate with cross-functional teams, and contribute to the architecture of our data platform. If you are passionate about Java and data engineering, this is your chance to make an impact in a forward-thinking company.

At Cision, we are dedicated to empowering each individual to leave a mark. Here, your voice resonates, your ideas carry weight, and your distinct viewpoint drives our collective achievements. As a vital member of our global team, you will flourish in an atmosphere that celebrates curiosity, teamwork, and innovation, while making significant contributions to the brands we support. Help us redefine the future of communication and establish meaningful connections that truly matter. Whether you're tackling intricate challenges or spearheading groundbreaking innovations, your personal growth equates to our success, and together, we’ll forge the conversations of tomorrow. Empower your impact at Cision. Be recognized, be comprehended, be your true self. Why join us?You will engage within a multi-skilled agile team in our Engineering sector, directly influencing our flagship product, Consumer Research. Your role will involve enhancing existing functionalities and developing new features, collaborating closely not just with other backend engineers across the department, but also with product and delivery managers, data scientists, designers, and frontend engineers to address our users' needs.You will achieve this by designing, developing, enhancing, and maintaining our real-time data processing pipelines that operate at terabyte to petabyte scales. You will contribute to the implementation of bespoke machine learning and AI solutions conceived by our data science team, along with the APIs that support both the product and API users.You will work with a cutting-edge technology stack, creating Java applications using the Spring Framework, and employing technologies such as Kafka, Solr, and PostgreSQL. You will deploy code within a continuous integration environment leveraging tools like Maven, Git, and more.

Join Our Team as a Senior Java Engineer at Hawk-Eye InnovationsHello, I'm Peter Laszlo, the Backend Discipline Lead and the hiring manager for this exciting opportunity. We invite you to apply for the Senior Java Engineer role within our Football Squad. If you have a passion for developing scalable backend systems and are eager to contribute to high-impact projects for FIFA and UEFA, this is the perfect chance for you.Your Daily ContributionsIn this role, you will be instrumental in designing, developing, and optimizing data-heavy backend services that drive live football events. Our team focuses on managing data feeds, event-driven processing, and cloud infrastructure to provide real-time insights to global football leagues and partners.Working in an agile environment, you will collaborate closely with engineers across our football backend team. The dynamic nature of our projects demands efficiency and scalability to ensure success.Our Core ValuesAt Hawk-Eye, we prioritize collaboration, ownership, and innovation. We foster an environment where engineers can make meaningful contributions, tackle challenging problems, and enhance their skills. We value proactive engineers who can immediately engage in mission-critical projects.Primary ResponsibilitiesDevelop, optimize, and maintain backend services utilizing Java (Spring Boot).Participate in design discussions for both new and existing projects.Engage with football-related data pipelines that support FIFA, Serie-A, and UEFA operations.Deploy and scale applications using AWS (ECS, Lambda, S3, DynamoDB, etc.).Improve system observability with real-time monitoring and logging tools, such as Datadog.Work with event-driven architectures and implement message queuing systems.

Role Overview Wise is hiring a Senior Backend Engineer for the Servicing Platform team in Budapest. This role focuses on building and maintaining backend systems with Java. The work supports Wise’s core services and aims to improve the experience for users worldwide. What You Will Do Design, develop, and maintain backend systems for the Servicing Platform using Java Collaborate with engineers, product managers, and other teams to deliver reliable software Contribute to improving service quality and system performance What We’re Looking For Strong experience in backend development with Java Ability to work effectively with cross-functional teams Focus on delivering high-quality, maintainable solutions Location This position is based in Budapest.

Company Overview:At Zocks, we are a pioneering venture capital-backed AI startup that is revolutionizing financial services and various industries prioritizing security and privacy. Our founding team comprises industry veterans from leading companies like Twilio, IBM, Microsoft, and Hearsay Systems, who have dedicated their careers to developing real-time communication solutions and enterprise platforms. We leverage cutting-edge AI technology to seamlessly connect human interactions with enterprise systems, beginning with the financial sector.Our mission is straightforward yet impactful: to reinvent business operations and streamline areas often hindered by inefficient processes. Our innovative platform empowers users to communicate effortlessly while we capture vital information, eliminating cumbersome data entry and allowing them to focus more on what matters most—their clients.Location: Budapest, XI. (On-site Monday to Thursday, Remote on Fridays)Why Join Us: As we continue to expand, we are in search of a Senior Software Engineering Manager with a minimum of 7 years in Software Engineering and at least 3 years in a leadership role to guide and mentor our talented team of developers. We seek an individual who can introduce innovative ideas, possess advanced technical expertise, and have a strong passion for innovation. In this pivotal role, you will drive our projects forward, enhance our product offerings, and address the increasingly complex needs of our customers using agile methodologies and state-of-the-art technologies.

Become a pivotal member of our innovative team as a Senior Embedded Software EngineerSentec AG is a distinguished Swiss-American company at the forefront of medical device technology, specializing in advanced respiratory care solutions. Since our inception in 1999, we have embraced a deep-tech philosophy, integrating cutting-edge science and innovative technologies to enhance the lives of respiratory patients around the globe.Our mission is to drive transformative changes in clinical practices that mitigate the challenges faced by respiratory patients, optimize healthcare outcomes, and reduce costs. We leverage the latest scientific advancements and engineering technologies across our three primary platforms: transcutaneous monitoring, intrapulmonary percussive ventilation, and electrical impedance tomography. All our products are developed and manufactured in-house, ensuring the highest quality standards.We are proud to have received Kununu’s Top Company award in 2025 and 2026.

Lab49 is seeking an experienced Senior Java Developer to spearhead innovative projects that will drive transformative change for our distinguished Financial Services clients. In our Agile-driven environment, you will leverage your extensive server-side expertise to develop cutting-edge financial systems that redefine industry standards.

Cambridge Mobile Telematics (CMT) develops technology to improve road safety for drivers worldwide. The company’s DriveWell® Fusion platform gathers sensor data from millions of IoT devices, such as smartphones, proprietary Tags, connected vehicles, dashcams, and third-party hardware. This data, combined with contextual information, helps organizations understand vehicle and driver behavior. Auto insurers, automakers, commercial mobility providers, and public agencies use CMT’s insights to support risk assessment, safety programs, claims handling, and driver improvement efforts. CMT is headquartered in Cambridge, MA, with offices in Budapest, Chennai, Seattle, Tokyo, and Zagreb. Role overview The Senior Software Engineer, Customer Solutions, will focus on building and enhancing systems for CMT’s growing customer base. This position leads the development of custom applications and integrations that address specific business needs. Responsibilities include overseeing design, guiding implementation, and ensuring smooth deployment throughout each project. What you will do Lead the creation and improvement of tailored systems and applications for customers Oversee system design and integration from planning through deployment Work closely with clients and internal teams to ensure solutions meet business requirements What we look for Experience developing software solutions for external clients or partners Ability to manage the full project lifecycle, from design to deployment Strong communication skills and a customer-focused approach

Company Overview:At Zocks, we are a pioneering AI startup backed by venture capital, dedicated to revolutionizing the financial services sector and beyond, where security and privacy are paramount. Our founding team comprises veterans from the realms of real-time communication, enterprise platforms, and security-sensitive industries, hailing from renowned organizations such as Twilio, IBM, Microsoft, and Hearsay Systems. We leverage artificial intelligence to seamlessly connect human interactions with enterprise systems, starting with the financial services landscape.Our mission is straightforward yet impactful: to transform business operations by eliminating outdated, cumbersome processes. Our innovative platform facilitates natural communication, allowing us to capture essential data seamlessly, thereby minimizing manual data entry and enabling our users to focus on what truly matters - their clients.Location: Budapest, XI. (On-site Monday to Thursday, Remote on Fridays)Why Join Us: As we embark on our next phase of growth, we are eager to welcome a Senior Software Engineer with a minimum of 4 years of experience to our dynamic development team. We seek an individual who can inject fresh ideas, demonstrate advanced technical prowess, and possess a fervor for innovation. Your contributions will be vital in advancing our projects and enhancing our product offerings.

Join the Getting Help Team at Wise!At Wise, our mission is to revolutionize financial services by making them faster, simpler, and more accessible for everyone. The Getting Help team is integral to this mission, focusing on empowering our customers to resolve their issues swiftly and effectively.We have established a robust infrastructure that includes FAQs, self-service pages, and a newly launched chat platform—our primary support channel. With our commitment to enhancing customer interactions, automating solutions, and supporting other teams, we are dedicated to improving overall support experiences. As we aim to make chat the preferred communication channel for our customers by 2026, we need your expertise to elevate it to the next level!  About Our TeamWe are a dynamic, cross-functional team composed of backend, frontend, iOS, and Android engineers, collaborating closely with a Product Manager, Analyst, and Designer. Together, we strive to deliver seamless and impactful solutions across all Wise platforms. Our culture thrives on collaboration, ownership, knowledge sharing, and a shared commitment to building stable, scalable systems while embracing rapid learning and iteration.

Role overview Wise is hiring a Senior Software Engineer in Budapest to work on Fraud Handling. This position focuses on improving fraud detection systems and building solutions that help secure the platform. As part of this team, the work directly contributes to protecting users from fraudulent activity. The role involves both strengthening existing safeguards and developing new ways to identify and prevent fraud. What you will do Enhance fraud detection systems to better identify suspicious activity Develop and implement solutions that improve platform security Support efforts to protect Wise users from fraud Location This role is based in Budapest.