Principal Backend Voice Software Developer

Welcome to Kaizen Gaming!At Kaizen Gaming, the driving force behind Betano, we stand as one of the leading GameTech companies globally, operating across 19 dynamic markets. Our commitment is to harness the latest technological advancements, delivering unparalleled experiences to millions of customers who rely on us for their entertainment.With a vibrant team of over 2,700 Kaizeners from more than 40 nationalities across three continents, we embrace diversity and innovation.Proudly recognized among the Best Workplaces in Europe and certified as a Great Place to Work, we promise that every day here is unique and filled with potential. Are you ready to Press Play on your career?About the Role:As a Lead Principal Backend Engineer, you will be pivotal in designing and evolving high-performance, scalable backend systems. We seek a technical expert who excels in leadership and mentorship, guiding engineers at all levels. Your expertise will drive the development of our robust software solutions while collaborating with cross-functional teams to achieve excellence.Your Responsibilities Include:Architecting & Innovating: Partner with our agile team to create scalable, secure, and high-performing backend systems that power our innovative solutions.Code Craftsmanship: Write clean and efficient code that serves as the backbone of our technology stack.Mentorship: Inspire and mentor fellow tech leaders, fostering skill development and the adoption of best practices.Performance Optimization: Spearhead initiatives to identify and enhance system performance, ensuring seamless user experiences.Integration Collaboration: Work closely with cross-functional teams to guarantee smooth system integration.Tech Trendsetter: Stay ahead of technological trends, applying emerging technologies to augment our capabilities and disrupt the industry.Best Practices Advocate: Collaborate with Principal Engineers to establish company-wide best practices and foundational software development processes.Strategic Vision: Define and concentrate on the technical roadmap, aligning it with the company's long-term goals beyond immediate business needs.

Our mission is to empower individuals to create wealth.At Trading 212, we are transforming the landscape of trading and investing by developing outstanding products that our users adore.Our dynamic team is composed of highly motivated individuals who pursue excellence and cherish autonomy.With over 4.5 million clients and more than €30 billion in assets under management, our growth and trust in the market speak volumes about our success.We are in search of passionate and experienced Principal Software Engineers to drive innovation and scalability in our systems.

Join Bosch Digital as a Backend Developer Intern and kickstart your career in software development. As part of our team in Sofia, you will work on innovative projects that drive digital transformation and enhance our solutions for customers worldwide. This is a fantastic opportunity to gain hands-on experience in backend technologies and contribute to meaningful projects.

As part of our continuous expansion, we are eager to connect with technology experts and keep an open line for future prospects and exciting projects. This is a talent pool opportunity in Portugal, where we are currently welcoming spontaneous applications to establish a robust pipeline of proficient professionals for when relevant positions arise.We are actively seeking talented Java Backend Developers who are interested in joining our Research & Development teams for future opportunities.Our teams are responsible for developing and maintaining high-performance, low-latency platforms utilized by thousands of users globally every day. The backend services we create manage intricate business processes such as order processing, validation, routing, data reconciliation, and performance-critical calculations. We prioritize code quality, reliability, and scalability, achieving this through meticulous design, peer reviews, and thorough testing. Our engineers operate in multicultural, distributed teams, collaborating with QAs, frontend developers, business analysts, and product stakeholders in an agile (Scrum/Kanban) environment.Technologies We Work With:Core Java (11+): Collections, Streams, Threads, Concurrency, JVM tuningFrameworks & Tools: Spring, JUnit5, AssertJ, MockitoInfrastructure: Docker, PostgreSQL, Liquibase, SplunkCollaboration & CI/CD: Atlassian suite, Slack, TeamCity, SonarOur Work Culture:We are passionate about coding in Java and delving into the underlying mechanics (threads, collections, memory, JVM).We utilize solid computer science foundations to address complex challenges with efficient solutions.We are committed to writing clean, maintainable, and well-tested code.We transform ideas from concept to production and celebrate our achievements together.We foster a collaborative, supportive, and feedback-driven environment across cultures and time zones.We communicate in English (B2+).

Join Us in Empowering Wealth CreationAt trading212, we are redefining the landscape of trading and investing by crafting innovative products that resonate with users. Our commitment to excellence and rapid execution has been pivotal to our growth.Currently, we proudly support over 4.5 million clients, managing more than €30 billion in assets—an impressive reflection of the trust and scale we’ve achieved in just a few years.Your Role and ResponsibilitiesTake a comprehensive approach to problem-solving, integrating business challenges, service architecture, and the technological landscape into your solutions.Lead the full software development lifecycle (SDLC), from requirements gathering and design through coding, testing, deployment, and monitoring. You will own your code, ensuring it remains robust and optimized for enhancements when opportunities arise.Design for performance, scalability, and resilience, ensuring your code operates flawlessly in a demanding environment where downtime, latency, and data loss are unacceptable.Collaborate within small, autonomous teams with rapid release cycles, leveraging agile methodologies to maintain high velocity while preserving necessary processes.Engage in continuous learning and knowledge sharing within the team, as our growth is contingent on the company’s collective evolution and constructive feedback. What We Expect from YouA solid understanding of common communication protocols, with comfort in using HTTP, WebSockets, and AMQP, alongside the ability to discern appropriate application contexts.Experience with at least one widely-used web framework, regardless of programming language. Our technology-agnostic platform allows engineers to choose the most suitable language for specific tasks, balancing cutting-edge solutions with proven technologies.A strong grasp of RDBMS concepts, including indexing, transactions, isolation levels, and locking mechanisms, with the skills necessary to design high-performance databases.

Join our talented team at devexperts as a Backend Engineer, where you'll play a pivotal role in developing cutting-edge software solutions. Your expertise in backend technologies will help us enhance our products and provide exceptional service to our clients.

TINQIN has been a pioneer in delivering cutting-edge software solutions for the insurance sector for over a decade, earning the trust of numerous long-term clients and partners.As a proud member of the Be Ys Group, TINQIN has broadened its expertise into the realm of digital trust and identity technologies. This rapidly expanding product line has now evolved into a dedicated entity known as KIPMI Software. We are actively seeking a Java Principal Engineer to join our innovative team dedicated to developing next-generation digital trust products.Be part of our mission to shape the future of technology!

Join Our Mission to Empower Wealth BuildingAt trading212, we are revolutionizing the trading and investing landscape by crafting innovative products that resonate with our users.We champion a culture of excellence and agility, driving our success in a rapidly evolving market.Currently, we proudly serve over 4.5 million clients, managing more than €30 billion in assets—a true testament to the trust we have established in just a few years.Your RoleDesign and implement solutions with a comprehensive understanding of business challenges, our service architecture, and the relevant technologies and infrastructure.Be involved in every phase of the software development lifecycle (SDLC)—from gathering requirements and designing implementation to coding, testing, deploying, and monitoring. You will take full ownership of your code and ensure its continuous improvement.Develop robust solutions focused on performance, scalability, and resilience—your code will operate in a high-stakes environment where downtime, latency, and data loss are unacceptable.Collaborate within small, autonomous teams that operate on short release cycles. We value agile methodologies and a balanced approach to processes that avoid chaos without compromising speed.Engage in knowledge sharing and continuous learning with colleagues. As our company evolves, so must we, and constructive feedback is one of our strongest tools for growth. QualificationsProven experience in developing services within a microservice architecture, having contributed to a highly scalable and performant system comprising over 200 microservices.Strong understanding of common communication protocols. You should be adept at utilizing HTTP/WebSockets and AMQP, with the ability to choose the appropriate protocol based on the context.Familiarity with at least one widely-used web framework, regardless of programming language. Our language-agnostic system empowers engineers to select the most suitable language for specific tasks. We strive for a harmonious balance between cutting-edge technologies and proven solutions.A comprehensive understanding of system performance, scalability, and security best practices.

Join SumUp as a Backend Engineer specializing in Go within our Payments Experience team. In this role, you will be instrumental in building and optimizing backend services that power our payment solutions. You will collaborate with cross-functional teams to enhance user experience and ensure seamless transactions.

At SumUp, we champion the everyday heroes—those with the courage and determination to pursue their passions and realize their dreams.We place small business owners at the center of our mission, crafting powerful and user-friendly financial solutions designed to empower them in managing their businesses. With a founder's mentality and a collaborative, 'team-first' spirit, our diverse teams across Europe, South America, and the United States unite to ensure that small business owners can thrive in their endeavors.About the TeamThe Payments Reporting team is integral to SumUp’s financial infrastructure, developing systems that millions of merchants depend on daily to reconcile, report, and make sense of their finances. We are currently on an exciting journey to build a reporting platform that accommodates both external integrators and internal teams at scale, delivering functionalities from file-based exports to real-time API reporting. This role has emerged due to our ambitious growth outpacing the capacity of our current team of three backend engineers, and we need someone who can take significant ownership of complex backend tasks, allowing the team to accelerate critical architectural improvements.What You Will DoDevelop and maintain backend reporting features, including Payout Reports, Payment Reports, Fee Invoices, and Transaction Reports.Design and manage Reporting APIs (like Transaction History and Payout History) that cater to both external integrators and internal stakeholders.Lead the migration of core payments functionality from legacy systems, modernizing the infrastructure that supports our reporting platform.Ensure the operational health of reporting services through effective monitoring, incident response, and performance optimization.Actively engage in planning and refinement sessions, providing technical assessments and effort estimations.Mentor junior engineers through code reviews, collaborative sessions, and knowledge sharing.

SumUp’s Payments Tribe develops tools that make transactions easier for small businesses. The team in Sofia, Bulgaria, is searching for a Junior Backend Engineer with experience in Golang to help build and maintain these payment solutions. What you will do Collaborate with engineers to develop and maintain backend services using Golang Contribute to new features that support payment processing for users worldwide Assist in improving the reliability and usability of payment systems Role impact This position supports SumUp’s mission to simplify payments for small businesses and enhance the experience for users globally.

Join Our Team at Kaizen Gaming!At Kaizen Gaming, the driving force behind Betano, we proudly stand as one of the largest GameTech companies globally, with operations in over 20 markets. Our mission is to harness cutting-edge technology to deliver exceptional entertainment experiences to our millions of satisfied customers.Our diverse workforce boasts more than 2,700 talented individuals from over 40 nationalities, spanning three continents. We are thrilled to be recognized among the Best Workplaces in Europe and certified as a Great Place to Work across all our offices. Here, every day is an opportunity for growth and innovation. Are you ready to Press Play on Your Potential?The RoleDesign, build, and maintain efficient, reusable, and reliable code.Develop interfaces between components of heterogeneous subsystems in a high-volume, transaction-oriented production environment.Ensure optimal performance, quality, and responsiveness of applications.Identify bottlenecks and bugs, devising effective solutions to complex challenges.Technology StackOur services primarily utilize C# / ASP.NET, with newer applications developed in .NET Core. The front-end employs Vue.js for new projects, while legacy systems use server-rendered (Razor) views alongside jQuery and Knockout.js. For data storage, we predominantly use MS SQL Server, supplemented by Redis and ElasticSearch when appropriate. RabbitMQ serves as our preferred message broker, and we rely on Gitlab for version control and CI, complemented by the Atlassian suite for ticketing and documentation.What You’ll BringA minimum of 1 year of development experience with C# / ASP.NET / MVC (full framework or .NET Core).A foundational understanding of web technologies, including HTTP.Experience with data access through databases and APIs.Familiarity with unit testing is an advantage.Perks of Working with Us Hybrid working model. Onboarding support from a dedicated buddy. Competitive salary and bonus structure.‍ Comprehensive private health insurance for you and your family. Monthly meal allowance. Access to a multi-sport card. Additional vacation days.⭐ A developmental 360° feedback framework. Unlimited access to Udemy and ongoing training opportunities.

Welcome to Kaizen GamingAt Kaizen Gaming, the driving force behind Betano, we rank among the world's leading GameTech companies, operating seamlessly across 19 diverse markets. Our mission is to harness the latest technological advancements to deliver unparalleled experiences to the millions of customers who rely on us for their entertainment.With a vibrant community of over 2,700 team members from more than 40 nationalities spread across three continents, we embrace diversity and innovation. Our #oneteam ethos has earned us recognition as one of the Best Workplaces in Europe and the prestigious Great Place to Work certification across our offices. Are you ready to Press Play on Your Potential?About the RoleAs a Principal Engineer within our Technology department, you will play a pivotal role in shaping our frontend strategies. Your expertise will guide teams in crafting elegant, high-performance solutions to real-world challenges. You will mentor them in coding, testing, debugging, and performance analysis, while conducting thorough code reviews to ensure quality and efficiency.In this role, you will be at the forefront of developing cutting-edge applications using modern technologies. Your focus will include executing our technical roadmap, emphasizing code modularity, reusability, and testability. You will also be responsible for performance tuning and monitoring, while providing vital technical guidance to our development teams, ensuring adherence to best practices and design patterns. Collaborating closely with UI/UX designers, you will elevate the user experience for our customers.Our Technology StackWe leverage a robust tech stack, including Vue.js 3, TypeScript, VueX, Pinia, Tailwind, Webpack, Vite, Storybook, Jest, Vitest, Openshift, and private npm packages to develop our internal shared libraries, alongside a micro frontends architecture.As a Principal Frontend Engineer, your responsibilities will include:Coding alongside engineers, demonstrating technical leadership by addressing root causes and leading by example.Understanding key frontend performance metrics, with experience in debugging frameworks like Lighthouse and ChromeUX.Exerting technical influence across multiple teams, mentoring individuals on advanced technical issues, and assisting technology managers in fostering team member growth.Collaborating with Product and Delivery teams to build scalable solutions that meet non-functional requirements regarding performance, security, and reliability.

Join Our Innovative Team as a Senior Backend Software Engineer! The Mobile Fulfilment Systems team at Ocado Group is pioneering state-of-the-art automation solutions for in-store and warehouse online order fulfilment. We harness the power of distributed backend systems, user-friendly mobile applications, and advanced autonomous robots to facilitate rapid, scalable, and cost-efficient order collection. As a key member of our Mobile Fulfilment Systems team, particularly within the In-Store Fulfilment (ISF) division, you'll be involved in designing and developing distributed cloud-based systems, PWA mobile applications, and web technologies aimed at automating the fulfilment of online customer orders at scale. What is In-Store Fulfilment? ISF is a comprehensive cloud-based solution that empowers stores to efficiently fulfil customer orders, enhancing the shopping experience while minimizing operational costs. We are currently operational in over 1,000 stores across 11 countries and 4 continents, handling more than 300,000 customer orders weekly. In Your Role as a Senior Software Engineer, You Will: Design, develop, and maintain large-scale, high-availability distributed systems. Lead technical initiatives from conception through to implementation, fully owning the planning, coordination, design, and execution processes. Ensure solutions consistently meet quality standards by adhering to best practices in testing, code quality, monitoring, and alerting. Contribute to the long-term architectural and product vision. Utilize AI tools, such as Claude Code, Gemini, and GitHub Copilot, to enhance our development processes. Engage in all phases of the software development lifecycle within an agile team framework. Continuously seek to enhance our processes, workflows, and tools. Collaborate closely with business and product partners to translate system requirements into engineering solutions. Participate in our on-call rotation to support production services. Mentor and train both new and existing team members in their professional development.

Join the Global Bank tribe where we are revolutionizing the banking infrastructure for merchants. Our mission is to empower small merchants worldwide with a digital business account that simplifies their banking needs, making us the go-to banking partner for them.As a Senior Backend Engineer, you will play a pivotal role in transitioning from fragmented regional systems to a unified global infrastructure, enabling millions of merchants to access seamless banking services tailored to their needs.Your expertise will be crucial in designing and developing a fully distributed, event-driven system that is resilient and compliant across multiple regions.In this role, you will primarily work with Kotlin while having the opportunity to engage with Elixir and Golang. We embrace Extreme Programming methodologies, focusing on small iterations, daily deliveries, and prioritizing technical design quality and deep problem-solving.Our technology stack includes Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes, leveraged by observability tools such as Prometheus, Grafana, and Honeycomb. Additionally, we utilize AI-assisted development tools including Cursor and GitHub Copilot.

At SumUp, we celebrate the everyday heroes who possess the courage to pursue their passions and the determination to turn their dreams into reality. Our mission revolves around empowering small business owners with innovative, user-friendly financial solutions that simplify the management of their enterprises. With a founder's mentality and a 'team-first' attitude, our diverse teams across Europe, South America, and the United States collaborate to ensure that these entrepreneurs can thrive in their endeavors. The Global Bank team at SumUp is responsible for developing the foundational infrastructure and services that provide merchants with digital bank accounts, enabling them to manage their finances efficiently and reliably. Within this team, the Balance Management Squad is pivotal. We are currently nearing a significant milestone: the consolidation and modernization of our balance management system in Europe. Our next ambitious project is to establish a global transaction history service—a unified platform that offers merchants consistent and transparent insights into their financial activities across all regions. As a Backend Engineer, you will play a crucial role in modernizing existing systems while balancing innovation and stability. You will collaborate with teams across various regions to build reliable services that can navigate diverse markets with unique regulatory requirements. If you are passionate about solving complex problems in high-load systems, have a curiosity for banking, and are eager to join a team that embraces challenges, we would love to connect with you.

Join our dynamic team at Kostal Group as an Embedded Software Development Intern! This is a unique opportunity for recent graduates or students aspiring to enhance their technical skills in embedded systems. You will work closely with experienced engineers in a collaborative environment, contributing to innovative projects that shape the future of automotive technology.

Join Printec, a premier Technology Solutions Provider and Systems Integrator in Southeastern Europe, as a C/C++ Software Developer. We specialize in delivering comprehensive solutions to the Banking, Retail, and Telecommunications sectors. In this dynamic role, you will engage in the design, development, and maintenance of innovative software applications.At Printec, we prioritize our employees' growth by fostering a supportive environment that values diversity and promotes teamwork. You'll have the chance to work on cutting-edge projects and technologies within a fast-paced international business context, all while honing your skills to meet your personal and professional goals.Main Responsibilities:• Design, develop, and maintain software solutions.• Manage C++ and PHP projects.• Implement new customer requirements effectively.• Conduct code reviews and troubleshoot issues as needed.

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