Backend Java Software Engineer (m/f/d)

Join our dynamic tech team at Sixt SE as a Backend Java Software Engineer! In this exciting role, you will be responsible for designing, developing, and maintaining robust backend systems that drive our innovative applications. Collaborate with cross-functional teams to deliver high-quality software solutions that enhance our customer experience.

Join our dynamic team at inetum2 as a Java Backend Engineer. We are looking for a talented individual who is passionate about backend development and eager to contribute to innovative technology solutions. In this role, you will collaborate with cross-functional teams to design and implement high-quality software solutions that meet our clients' needs.

About Air AppsAt Air Apps, we embrace a vision of expansive thinking and agile execution. Founded by a family in 2018, our mission is to revolutionize planning with the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP). With our roots in Lisbon, Portugal, and additional offices in San Francisco, we have successfully maintained self-funding while achieving over 100 million downloads globally.Our commitment to long-term innovation drives us to continually challenge conventional wisdom, expanding the frontiers of AI-driven solutions that genuinely transform lives. Here, you will play a pivotal role in crafting products that empower individuals worldwide.Join us on our mission to redefine resource management and make a lasting impact.The RoleAs a Backend Software Engineer, you will take charge of designing, developing, and maintaining the server-side components of our applications. You will work collaboratively with product managers, frontend developers, and other cross-functional teams to deliver robust and scalable backend services that enable essential features and foster rapid growth.Please be aware that this posting is intended to expand our talent pool while we prepare to officially launch the job. We will reach out to you as soon as it becomes available.ResponsibilitiesAPI & Service Architecture - Design and implement RESTful or GraphQL APIs, microservices, and business logic utilizing Node.js and TypeScript.Database Design & Integration - Model and manage data queries using Supabase and PostgreSQL, including functions, row-level security, and real-time features.Cloud Infrastructure - Deploy and oversee services on Google Cloud Platform (GCP), particularly with Cloud Run, Cloud Functions, IAM, and Pub/Sub.Code Quality & Testing - Create clean, testable code utilizing unit, integration, and end-to-end testing frameworks (e.g., Jest). Participate in code reviews and uphold quality assurance practices.Security & Reliability - Develop secure-by-default solutions for authentication, authorization, and data protection, adhering to Clean Code and Clean Architecture principles.Monitoring & Operations - Establish logging, monitoring, and operational practices to ensure system reliability.

Join Dashlane as a Backend Software Engineer and be part of a dynamic team dedicated to enhancing digital security for our users worldwide. In this role, you will design, develop, and maintain scalable backend systems that support our innovative applications. Your contributions will directly impact the user experience and the overall success of our products.

About the Role Renesas Electronics Corporation is hiring a Senior Backend Software Engineer in Lisbon. This role focuses on designing, building, and maintaining backend systems that support Renesas products. What You'll Do Develop and maintain backend software components Work with cross-functional teams to deliver reliable solutions Contribute to the architecture and performance of core systems Location This position is based in Lisbon.

Join the Tripadvisor Group, where we connect people with unforgettable experiences and strive to be the world's most trusted source for travel and adventure. Utilizing our vast portfolio of travel brands and advanced technology, we aim to engage a global audience and facilitate meaningful connections with our partners across diverse travel categories including accommodations, restaurants, and unique experiences. The Tripadvisor Experiences Engineering team, distributed across Europe, plays a pivotal role in managing Tripadvisor.com and our mobile applications, alongside the supporting infrastructure. We empower operators to grow their businesses while enabling third parties to leverage our comprehensive inventory. Our dedicated team provides essential tools that support our customer service representatives in delivering exceptional service to travelers and operators worldwide. We are in search of a Senior Software Engineer to become part of our dynamic team. This position is available to candidates who can commute (generally within a 2-hour radius) to one of our office hubs in Lisbon. We appreciate flexibility in work arrangements and value the importance of in-person interactions for collaboration and connection. Expect a remote-first work model complemented by periodic office gatherings for team planning and engagement. At Tripadvisor, our engineers thrive on tackling a diverse array of technical challenges. This backend-focused full-stack role primarily involves backend development, with opportunities to engage in frontend projects as well. While a willingness to learn is essential, expertise in frontend development is not required at the outset, as we offer on-the-job training. Our collaborative environment is designed for productivity, where engineers work closely with product managers and designers throughout the entire software development lifecycle—from design and coding to testing and deployment. Most engineers deploy code to production every few days within our daily release cycle. The technology stack at Tripadvisor includes Java, React, Typescript, GraphQL, Kubernetes, SQL, and NoSQL databases on AWS. While strong proficiency in Java is mandatory, familiarity with the entire stack is not a prerequisite; a passion for learning is what we value most. Why Work with Us? Competitive compensation packages, including base salary, annual bonuses, and more. “Work your way” approach offering flexibility to cater to your lifestyle and needs.

Join Dashlane as a Junior Backend Software Engineer and embark on a journey to enhance user security and experience. In this role, you will collaborate with seasoned engineers to design and develop backend solutions that power our innovative password management platform.As a key member of our engineering team, you will engage in coding, debugging, and testing applications while contributing to architecture discussions. This is an excellent opportunity for those eager to learn and grow in a supportive environment.

Join Dashlane as a Backend Software Engineer Intern and take the first step in your career by contributing to our innovative projects. In this role, you will collaborate with our talented engineering team to develop robust backend solutions that enhance user experience and ensure data security.

Join Sixt as a Full Stack Engineer specializing in Java and React! We are looking for a talented individual to contribute to our innovative tech team in Lisbon. In this role, you will work on exciting projects, develop cutting-edge applications, and collaborate with cross-functional teams to deliver exceptional digital solutions.

Join Gapstars as a Mid-Level Software Engineer!At Gapstars, we pride ourselves on building innovative remote teams across Sri Lanka and Portugal, dedicated to delivering exceptional software solutions for forward-thinking tech companies. Our dynamic team of over 275 TechStars is committed to transforming scalable software into high-performance products that reshape industries. We collaborate with ambitious partners in technology, striving to excel in their respective markets.Role OverviewWe are looking for a Mid-Level Software Engineer who will be instrumental in supporting a rapidly expanding FinTech cloud-based data and analytics platform utilized by leading global market players. Your role will focus on developing reliable, secure, and high-quality systems that facilitate large-scale data distribution, emphasizing hands-on engineering, automation, and data visualization.This is a hybrid role based in Lisbon, Portugal.Key Responsibilities:Contribute to the growth of our FinTech solutions by shaping technology initiatives.Translate high-level business objectives into scalable, architecturally sound solutions leveraging GCP.Develop robust, secure systems, ensuring effective workarounds for service continuity during failures.Plan and execute structured releases to minimize disruptions, with clear rollback strategies.Mentor junior team members, promoting a culture of continuous learning and development.Essential QualificationsAt least 2 years of experience in Python and/or Java.Strong expertise in databases and cloud data warehouses (e.g., SQL, PostgreSQL).

We are in search of a dynamic and enthusiastic Junior Java Developer to join our innovative team for a client project based in Lisbon, Portugal. This position is ideal for professionals who possess a solid foundation in software development and are eager to contribute to cutting-edge solutions. If you thrive in a collaborative environment, pay close attention to details, and have a strong desire to advance your career, this opportunity is tailor-made for you!Key Responsibilities:- Design, develop, and maintain robust Java applications;- Investigate and troubleshoot technical challenges;- Engage in requirements analysis and contribute to software architecture design;- Uphold code quality by adhering to best practices;- Collaborate effectively with cross-functional teams to deliver superior results.

The Tripadvisor Group is dedicated to connecting people with experiences that are truly worth sharing. Our mission is to be the most trusted source for travel and experiences globally. By leveraging our esteemed brands, cutting-edge technology, and extensive capabilities, we connect a worldwide audience with partners through engaging content, expert travel advice, and two-sided marketplaces offering experiences, accommodations, restaurants, and more. The Tripadvisor Experiences Engineering team operates across Europe, overseeing Tripadvisor.com, the Tripadvisor mobile applications, and their supporting infrastructure. We manage the systems that empower operators to expand their businesses and enable third parties to access our extensive inventory. Additionally, we provide essential tools that equip our customer service teams to deliver world-class support to travelers and operators around the globe. We are on the lookout for a Software Engineer II to join our rapidly expanding team. This position is available for candidates residing within a commutable distance (typically up to 2 hours) from one of our office hubs in Lisbon, Saldanha. We embrace flexibility in work arrangements while also valuing the importance of in-person interactions for collaboration and connection. Expect a remote-first working model with occasional in-person gatherings at your closest office for team bonding, strategic planning, or other significant moments. At Tripadvisor, our engineers are adaptable and relish tackling diverse technical challenges. This is primarily a backend-focused full-stack role, where you'll predominantly work on backend tasks, with occasional frontend projects. While a strong desire to learn is essential, prior expertise in frontend development is not a prerequisite; we provide on-the-job training. Within our dynamic environment, our engineers collaborate closely with product managers and designers, engaging in the entire software development lifecycle—from design and coding to testing and deployment. Most of our engineers release code to production every few days, following a daily release cycle. Our tech stack includes Java, React, TypeScript, GraphQL, Kubernetes, SQL, and NoSQL databases, all hosted on AWS. While familiarity with every technology is not mandatory, a strong willingness to learn is crucial. You should have experience with a statically typed, object-oriented programming language such as Java, C#, or C++. Perks of Working at Tripadvisor Competitive compensation packages, including base salary and annual bonuses.

About GapstarsGapstars, a premier software development services firm based in the Netherlands, specializes in cultivating remote, agile teams in Sri Lanka and Portugal for groundbreaking tech companies. Our workforce of over 275 TechStars is dedicated to transforming scalable software into high-performance products that redefine industry standards. We partner with ambitious tech firms aiming to dominate their markets.Position OverviewWe are looking for a Senior Software Engineer to enhance a rapidly expanding FinTech’s cloud-based data and analytics platform utilized by leading global market players. You will design and implement dependable, secure, and high-quality systems that facilitate extensive data distribution, with a strong emphasis on hands-on engineering, automation, and data visualization.This role is hybrid, located in Lisbon, Portugal.Key ResponsibilitiesDrive technological advancements within a fast-growing fintech company by shaping its tech solutions.Interpret business requirements and convert high-level goals into well-structured, scalable solutions utilizing the best practices of GCP.Develop robust, secure, and reliable systems, implementing practical workarounds to ensure service continuity during failures.Plan and execute well-structured releases while minimizing disruption and establishing clear rollback strategies.Guide and support junior team members, promoting a culture of learning and professional development.QualificationsAt least 5 years of experience in software development using Python and/or Java.Strong expertise in databases and cloud data warehouses (SQL, PostgreSQL, MySQL, etc.).

Join the Kaizen Gaming Family!At Kaizen Gaming, the driving force behind Betano, we stand as one of the largest GameTech companies globally, operating across 19 markets. Our commitment to leveraging state-of-the-art technology empowers us to deliver unparalleled experiences to our millions of valued customers.Our vibrant team of over 2,700 diverse 'Kaizeners', hailing from more than 40 nationalities and spanning three continents, is what sets us apart. We take pride in being recognized among the Best Workplaces in Europe and have earned the prestigious Great Place to Work certification across our offices. Are you ready to Press Play on your potential?About the RoleAs a Senior Backend Engineer, you will be an integral part of a self-sufficient Agile team, collaborating closely with the Product Owner, Agile Delivery Lead, Automation Testers, and fellow Software Engineers to create a competitive edge for Kaizen while delivering a unique online experience to our customers. You will also engage with talented backend professionals within our Backend Chapter.Your Responsibilities Include:As a Senior Software Engineer at Kaizen, you will manage a variety of projects, ranging from our customer-facing websites and mobile applications to our internal tools and backend services, all designed to handle high volumes of traffic.Take full ownership of our applications throughout an engaging development journey.Develop innovative solutions from concept to production.Transform requirements into efficient and sophisticated technological systems, leveraging our large-scale, highly available infrastructure.Design, build, and maintain efficient, reusable, and reliable code.Explore new technologies to discover efficient solutions for everyday challenges.Deliver high-value features swiftly.Challenge existing processes and foster improvement within the team and product.

Internship Overview evolution is looking for a Backend Engineering Intern to join the team in Lisbon. This position offers hands-on experience with real projects and the chance to work closely with seasoned engineers. What to Expect Collaborate with the engineering team on active backend projects Gain practical skills and learn from experienced colleagues Contribute ideas and support ongoing development work This internship is designed for those eager to grow technical abilities in a supportive, team-driven setting.

We are seeking enthusiastic and skilled Junior Software Engineers to join our team in crafting innovative SaaS-based solutions aimed at combating money laundering and financial crime. Our mission is to unveil the truth and create a safer world by ensuring that illicit funds do not reach the hands of wrongdoers.As a Junior Software Engineer, you will:Collaborate with a talented team of software engineers.Develop new features that empower our platform to analyze data about individuals, apply machine learning models to classify behaviors, and integrate this with our existing datasets. Your contributions will assist our clients in identifying negative actions, understanding what occurred, and pinpointing when these actions took place.Play a key role in delivering new functionalities and maintaining our platform while we innovate with new technologies and scale our operations.Quickly learn and adapt to the technologies we employ for coding and deploying to Kubernetes.Engage in sprint planning and demonstrate the features you’ve developed to stakeholders.Take ownership of your code quality, ensuring rigorous testing and maintaining system integrity.Follow and propose enhancements to best practices for transitioning code from initial requirements to deployed services in production.Our Tech Stack:We utilize a technology stack optimized for public cloud architectures, particularly AWS and GCP.Kotlin is our primary language for backend services development.Our database technologies include significant use of relational databases like Postgres and a distributed SQL database, Yugabyte.We employ an event-sourced model with Kafka for our communication bus and gRPC for intra-service communication.Modern observability solutions are built on Grafana Cloud, and we utilize ArgoCD for code deployment.We prioritize engineering excellence, striving to deliver the highest quality code and solutions to our customers.

Emma Sleep is hiring a Senior Backend Engineer with expertise in Golang to help shape the technology behind its global platform. This position is based in Lisbon and centers on developing and refining backend systems that keep Emma Sleep’s operations running smoothly. Key responsibilities Design, build, and maintain backend services using Golang Improve system performance and scalability Support the reliability and efficiency of Emma Sleep’s technology platform Location This role is located in Lisbon.

About the Role tgs is looking for a Backend Engineer (Python or Go) to join the Unbabel division in Lisbon. This team builds and maintains backend services that support enterprise-grade translation solutions across platforms. The work centers on making language technology smarter and more seamless for clients worldwide. What You Will Do Design and implement core backend services and reliable system architectures. Build, maintain, and improve codebases with an emphasis on testability and efficiency. Develop, optimize, and support key services and infrastructure in live production environments. Enhance system architecture to improve scalability, resilience, and performance. Analyze complex technical problems and help prioritize initiatives alongside product and engineering teams. Encourage continuous improvement, automation, code quality, and strong architectural practices. Work with teams across disciplines to deliver solutions that adapt to changing business and technical needs. Troubleshoot and prototype quickly to address platform and service challenges as they arise. Location Lisbon, Lisboa, Portugal

Join AirApps as a Backend QA Engineer where you will play a crucial role in ensuring the quality and reliability of our backend systems. You will collaborate with developers to design and implement test plans, identify bugs, and enhance our products' performance. This is an exciting opportunity to contribute to a growing tech company in a vibrant city.

About the Role TransPerfect’s Unbabel team in Lisbon is looking for a Backend Engineer with experience in Python or Go. This role focuses on building and improving backend services that power cross-platform translation solutions for enterprise clients. The team values reliability, scalability, and seamless performance as it develops intelligent language products. Main Responsibilities Design and implement reliable backend architectures and core services. Create, maintain, and optimize codebases with attention to testing and efficiency. Develop, support, and enhance critical services in production environments. Advance the architecture to support scalability, resilience, and high performance. Analyze complex technical problems and help prioritize initiatives with product and engineering teams. Promote continuous improvement, automation, code quality, and adherence to architectural best practices. Work with cross-functional teams to deliver solutions that meet changing business and technical needs. Troubleshoot and prototype to address platform and service challenges quickly. Location This position is based in Lisbon, Lisboa, Portugal.