Java Principal Engineer

WHO WE ARE:From our humble beginnings as a startup, we have transformed into a global fintech powerhouse, boasting a workforce of over 3,000 individuals from 80 diverse nationalities across 22 offices worldwide. Our rapid growth and diversification are unmatched.At SumUp, we empower businesses to receive payments effortlessly, manage orders swiftly, sell online seamlessly, and optimize their financial operations. Our mission is to equip businesses with the necessary tools to enhance both their operations and customer experiences.THE TEAM:Our advanced payments processing platform, which encompasses a variety of sub-platforms, has been the backbone of SumUp's global operations for more than a decade. A vital part of this platform is our Payouts team, dedicated to ensuring that our millions of merchants receive their payments reliably. This entire ecosystem is developed in Sofia by the Payments Tribe, consisting of several autonomous, cross-functional squads, each responsible for their segment of the platform from start to finish.We are currently in an exhilarating phase of scaling up and enhancing our existing products, while also innovating new solutions. Your contributions will be pivotal in refining and co-creating our existing and new microservices architecture, addressing complex scaling and development challenges where scalability and high availability are paramount.Join a team that prioritizes strong engineering principles and impactful solutions. You will play a significant role in the design and development of our new Java-based payout platform, utilizing cutting-edge technology to influence our product directly.OUR TECH STACK:Java (minimal setup, Spring Boot), Kafka Streams, PostgreSQL/RDBMS, RestEasy, VueJS.

With over a decade of experience, TINQIN has consistently provided cutting-edge software solutions specifically tailored for the insurance sector, earning the trust of numerous long-standing clients and partners.As a proud member of the Be Ys Group, TINQIN has extended its expertise into the emerging domains of digital trust and identity technologies. This rapidly expanding product line is now developing into a dedicated company, KIPMI Software. We are currently in search of a Senior Java Software Engineer to join our dynamic team dedicated to advancing these next-generation digital trust products.Be a part of our journey to shape the future of technology!

About Man GroupMan Group is a leading global alternative investment management firm dedicated to delivering superior performance for our sophisticated clients through our Systematic, Discretionary, and Solutions offerings. Leveraging exceptional talent and cutting-edge technology, our investment strategies encompass both single and multi-manager approaches, supported by extensive research and spanning public and private markets across major asset classes, with a strong emphasis on alternatives. We prioritize building deep partnerships with our clients, creating customized solutions to achieve their investment objectives for the millions of retirees and savers they serve.Headquartered in London, we manage $227.6 billion* and operate in numerous offices worldwide. Man Group plc is publicly traded on the London Stock Exchange under the ticker EMG.LN and is part of the FTSE 250 Index. For additional information, please visit www.man.com.* As of 31 December 2025The TeamOur team is currently experiencing significant investment aimed at optimizing the trading capabilities across AHL, Numeric, and Discretionary teams. The engineering team collaborates closely with the Trading Desk and the Execution Research team to design, develop, and maintain a world-class trading capability. We operate trading floors in London, Hong Kong, Boston, and New York, managing over $8 trillion annually.We are consistently broadening the markets, asset classes, and regions in which we trade while also diversifying our trading styles. Our team is tasked with creating innovative and adaptable software and tools to keep pace with these changes.

At Brandwatch, we are committed to empowering every individual to make a significant impact. Your voice is valued here, and your unique insights contribute to our collective success. As part of our global team, you'll flourish in an environment that fosters curiosity, collaboration, and innovation, while making meaningful contributions to the brands we support.Join us in redefining the future of communication and building authentic connections that matter. Whether you are tackling complex challenges or spearheading bold innovations, your growth is synonymous with our success. Together, we will create the conversations of tomorrow.Empower your impact at Brandwatch. Be seen, be understood, be you.Brandwatch is actively seeking a dedicated member for the Measure team. You will join a cross-functional and autonomous product team responsible for delivering solutions for performance monitoring and analytics across major social media platforms including Facebook, Instagram, Twitter, LinkedIn, TikTok, and YouTube.As a Backend Engineer at Brandwatch, you will work with the latest Long-Term Support (LTS) versions of Java and Spring, interfacing with some of the most influential social networks globally. You will consume and store data from their APIs at scale, creating REST APIs that expose vital social media KPIs to our clients. Additionally, you will design and implement a scalable microservice architecture.

Join a leading Technology Solutions Provider and Systems Integrator in Southeastern Europe, specializing in comprehensive solutions for the Banking, Retail, and Telecommunications sectors. We are seeking a skilled C++/Java Software Developer to enhance our team and contribute to the design, development, and maintenance of cutting-edge software solutions. At printec, we prioritize the growth and development of our employees, fostering a supportive environment that values diversity, openness, and teamwork. You'll have the chance to engage in innovative projects within a dynamic international business setting, while honing your skills to reach your personal and professional aspirations. Main Responsibilities: • Design, develop, and maintain software applications. • Work on C++ and Java/Android projects. • Implement new customer requirements and features. • Participate in code reviews and address bugs effectively.

Join our innovative PowerCurve Collections Software Engineering Team as a Full-Stack Software Engineer. In this role, you will contribute to our advanced debt management system, empowering clients to optimize their collections strategies and enhance their decision-making processes. You will create customizable and user-centric features that solidify our leadership in the market. Your Responsibilities:Design and implement scalable full-stack solutions utilizing Java and Angular.Produce clean, efficient, and thoroughly tested code.Maintain and enhance automated testing to guarantee software quality.Conduct code reviews to uphold coding standards and best practices.Participate in technical design and estimation discussions.Identify and resolve issues to deliver tangible business value.Foster knowledge sharing to promote team growth and engineering excellence.

Join our dynamic team at Accedia as a Junior Java Developer! We are seeking a passionate Java software developer who is eager to learn, collaborate with others, and grow within an innovative environment.What You'll Experience:Engage in a supportive atmosphere working with international clients, encompassing a wide variety of project domains and technology stacks throughout the entire software development lifecycle. This includes developing new features, enhancing existing functionalities, troubleshooting issues, participating in testing, and creating documentation.Collaborate closely with developers of various expertise levels to analyze technical requirements, propose architectural solutions, estimate efforts, and plan tasks effectively.Maintain active communication regarding tasks, requirements, challenges, and open questions with both your team and clients.Advance your skills by learning new technologies, participating in knowledge-sharing initiatives, and pursuing professional certifications.

Join our dynamic team at arhs as a Senior Java Developer and play a pivotal role in enhancing a high-impact public sector project for a prestigious European Institution. In this position, you will be instrumental in the development of a large-scale, high-visibility platform that prioritizes performance, availability, and scalability, managing a substantial volume of documents within a distributed, cloud-based architecture.Key Responsibilities:Design, develop, and maintain cutting-edge distributed applications utilizing Java 17, Spring, Elasticsearch, and Liferay DXP.Contribute to the evolution of a scalable, responsive platform hosted on Azure and Kubernetes, employing microservices and REST APIs.Collaborate closely with fellow developers, business analysts, and architects to deliver top-tier solutions.Ensure that all Liferay customizations adhere to modern web standards.Participate in code reviews, update technical documentation, and support CI/CD processes.Actively engage in performance optimizations and the progressive development of the architecture.This role requires in-person collaboration to foster learning, relationship-building, and teamwork with clients, colleagues, and communities. We strive to offer flexibility to meet your individual work/life balance needs.

Join Playtech as a Java Architect and play a pivotal role in shaping our software architecture. You will be responsible for designing scalable and efficient systems, collaborating closely with cross-functional teams, and ensuring the highest quality of code and performance. If you are passionate about technology and eager to make an impact in the gaming industry, we want to hear from you!

Become a pivotal part of our team as a passionate Java Developer and advance your career in a vibrant, rapidly evolving industry.This role provides an exciting opportunity to work on a significant internal product that is essential for processing and acquiring transactions from diverse sources, including POS systems, E-commerce platforms, Software POS solutions, and banking institutions. Enhance your expertise in an international, fast-paced environment while achieving your professional goals.As a Java Developer, you will engage in a variety of tasks as a member of our agile DevOps team, contributing to various phases (including but not limited to development, user acceptance testing, implementation, and support) of a project aimed at implementing a cutting-edge “omni-channel” payment infrastructure capable of accepting transactions from multiple endpoint devices.Key Responsibilities:- Actively engage in all stages of software product development, encompassing development, code reviews, testing, documentation, and deployments.- Participate in the development of the infrastructure, which includes coding, testing, deploying, and managing payment systems, as well as updating and patching applications.- Diagnose and resolve complex issues across all environments.

Ocadogroup is hiring a Senior Software Engineer in Sofia, Bulgaria. This position focuses on designing, developing, and implementing software solutions that support the company’s business goals. Role overview The Senior Software Engineer will work closely with colleagues from different teams to build and deliver products that align with customer needs. The role involves hands-on development and active participation in the full software lifecycle, from concept to deployment. What you will do Create and refine software designs to address business challenges Develop, test, and implement new features and applications Collaborate with cross-functional teams to ensure product quality Requirements Experience designing and building software solutions Ability to work collaboratively with colleagues from various disciplines Strong interest in technology and delivering results that make a difference

Join NielsenIQ as a Software Engineer, where you will play a vital role in developing innovative software solutions that drive data insights and analytics. Collaborate with cross-functional teams to create applications that enhance our clients' decision-making processes.

About the Role Entain is looking for a Senior Software Engineer with deep experience in Angular to help build and improve software that shapes our user experience. This position is based in Sofia. What You Will Do Develop and maintain Angular applications that support our products and services Work closely with engineers and designers to solve technical challenges Contribute to decisions that improve code quality and user experience Help deliver reliable, high-quality software in a collaborative environment Who We’re Looking For Strong background in Angular and front-end development Experience working on complex software projects Comfortable collaborating with cross-functional teams Motivated to make a real impact on products and users

Role Overview Lifted An Upwork Company is hiring a Senior Web Software Engineer in Sofia. This position focuses on building and maintaining web applications that meet high standards for quality and user experience. The role involves hands-on design, implementation, and ongoing support of web projects. What You Will Do Design and develop web applications from concept through deployment Implement features that improve usability and performance Maintain and update existing web solutions as requirements evolve Collaborate closely with team members to deliver reliable results What We Look For Strong experience with web development technologies Commitment to writing clean, maintainable code Ability to work well with others and share knowledge Focus on delivering a smooth, effective user experience

LucidLink develops cloud-based solutions that allow teams to access data securely from anywhere. The platform is built for handling large files and extensive data sets, offering a user experience similar to a local hard drive. Founded by storage industry veterans in 2016, LucidLink enables real-time collaboration for creative organizations, including major names in media and entertainment. The company operates from San Francisco and maintains an engineering office in Sofia, Bulgaria, serving customers in over 40 countries. Role overview The Senior Fullstack Software Engineer position is based in LucidLink’s Sofia office. This role centers on building and improving the platform that supports instant, secure data access and real-time collaboration. The work directly affects how teams worldwide manage and share large-scale content. What you will do Work on technical challenges that shape global collaboration, especially in media and entertainment. Contribute to a platform designed for performance, security, and ease of use with massive data sets. Collaborate with a team of over 230 professionals, where individual input quickly influences product direction. What we value Integrity, innovation, and empathy in daily work and team interactions. Commitment to personal growth and learning as the company expands. Supportive culture that encourages advancement and open communication. Benefits Flexible paid time off Competitive salary Stock options Health coverage

At SumUp, we recognize that small businesses are the driving force behind Europe's economy. Our mission has always centered around empowering these businesses to flourish. We are now embarking on an exciting new venture: a stablecoin designed to ensure payments are instant, cost-effective, and fully compliant with regulations.This is a unique opportunity to contribute to a product that sits at the convergence of fintech, cryptocurrency, and regulatory compliance, supported by a profitable organization that serves over 4 million merchants across 35+ markets.What’s the opportunity?We are seeking a Senior Backend Engineer who is passionate about building innovative solutions from the ground up. This role is ideal for someone who thrives in fast-paced environments and desires to enhance their technical skills in a high-impact field. You will collaborate closely with our Staff Engineer and cross-functional teams to bring our stablecoin project to fruition.This newly created position is pivotal for a high-priority project. It entails a dynamic, complex environment filled with learning opportunities, perfect for an individual who enjoys tackling challenging problems and delivering high-quality code.Your responsibilities will include:Building from the ground up: Participate in technical discovery and MVP development for SURO, coding daily in Kotlin or Go.Designing reliable systems: Assist in creating high-SLA, service-oriented systems that integrate with our ledger, reconciliation, and treasury platforms.Delivering quality: Write clean, maintainable code with a focus on reliability, security, and observability.Collaborating across teams: Work alongside Product, Finance, Legal, and Banking teams to ensure features comply with regulatory standards.Expanding your skills: Learn from seasoned engineers and deepen your expertise in payments, compliance, and blockchain technologies.Owning features end-to-end: Take full responsibility for specific components from design through deployment and monitoring.

Join our dynamic team at CyberArk as a Senior Software Engineer specializing in Python. In this role, you will be instrumental in designing and developing cutting-edge software solutions that secure the world's most sensitive data.We are looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges. Your expertise will help drive innovation and enhance our product offerings.

Join our dynamic team at arhs as a Senior Java Developer specializing in Liferay DXP. We are seeking an experienced professional to contribute to impactful public sector projects for a European Institution. In this role, you will be pivotal in developing a robust, large-scale platform designed for high performance and scalability, efficiently managing extensive document volumes within a distributed, cloud-based environment.YOUR ROLE:Design, develop, and maintain web applications utilizing Java 17 and Liferay DXP.Contribute to the creation of a scalable, responsive platform hosted on Azure and Kubernetes through microservices and REST APIs.Collaborate with developers, business analysts, and architects to deliver high-quality solutions.Ensure UI elements created in Liferay (using CSS/HTML/JS/React) are intuitive and adhere to modern web standards.Engage in code reviews, update technical documentation, and support CI/CD processes.Actively participate in performance optimizations and the evolution of the architecture.We prioritize in-person collaboration to foster learning and relationships with clients and peers. We are committed to providing flexibility to accommodate your work/life balance.

Role Overview Cision is looking for a Staff Software Engineer focused on Developer Experience (DevX). This remote role is open to candidates based in Hungary or Sofia, Bulgaria. The position centers on building and improving tools and platforms that help Cision’s engineering teams work more smoothly and efficiently. What You Will Do Design and integrate software solutions to streamline coding, testing, and deployment for internal engineering teams. Identify workflow challenges and implement improvements to boost developer productivity. Collaborate with engineers across the organization to shape the internal development ecosystem. Mentor other engineers and promote best practices in code quality, automation, and performance. Report to the DevX Manager (Observability & DevX). Who We’re Looking For Experienced software engineer with a background in developer tooling, platform engineering, or similar areas. Strong collaborator who communicates well with engineering peers. Comfortable leading technical initiatives and mentoring others. Committed to improving engineering workflows and internal developer experience. About Cision’s Culture Cision values curiosity, collaboration, and innovation. Team members are encouraged to share ideas and help shape the future of communication. The company supports authenticity and growth, recognizing each person’s unique contributions. Location Remote - Hungary; Sofia, Bulgaria