Backend Engineering Intern

SingleStore offers a 12-week Software Engineer Internship on the Platform team in Lisbon, Portugal for Summer 2026. This internship places interns alongside experienced engineers, contributing to projects that support real-time technologies used by businesses around the world. The team values quick release cycles, collaboration, and creative problem-solving. Interns see their work make a visible impact, with chances to join team outings and explore Lisbon together. What you will do Take responsibility for assigned projects from start to finish, with guidance from mentors. Participate in the entire product lifecycle, working closely with engineering, product, marketing, and sales teams. Contribute to SingleStore’s internal testing platform, which helps ensure the reliability and scalability of the database engine. Develop new features, write tests, and help improve the platform’s user experience. Platform team focus The Platform team builds and maintains systems that increase productivity for SingleStore’s engineering organization of over 180 people. Interns play a role in strengthening the internal testing platform, directly supporting the quality of SingleStore’s core technology. Mentorship and growth Interns receive support from engineers committed to their professional development, gaining exposure to both technical and business aspects of software engineering. Collaboration with cross-functional teams is an essential part of the internship experience.

SingleStore is hiring a Software Engineer Intern to join the Helios team in Lisbon, Portugal for Summer 2026. This is a paid, 12-week internship designed to provide hands-on experience with real-time technologies that support business operations around the globe. Internship Experience Interns at SingleStore work side by side with engineering teams, contributing directly to projects that move quickly from concept to production. Each intern takes ownership of a project, following it through the full product lifecycle. Throughout the program, experienced engineers provide mentorship and share both technical and business insights. Collaboration extends beyond engineering, with opportunities to work with product, marketing, and sales teams. Achievements are celebrated together, both in the office and at events across Lisbon. What you will do Join small teams to develop and test new product features Deploy code to production incrementally during the internship Experience the full software development process from start to finish Build a broad understanding of SingleStore’s products and business Requirements Currently enrolled in a Bachelor’s program in Computer Science, Electrical Engineering, Computer Engineering, or a related field Strong foundation in computer science fundamentals Proficiency in at least one programming language: JavaScript, Golang, or TypeScript Interest in creating highly reliable software Solid understanding of algorithms and data structures Preferred experience Familiarity with operating systems, distributed systems, concurrency, multithreading, or server architectures

SingleStore is offering a paid, 12-week Software Engineer Internship in Lisbon, Portugal for Summer 2026. This program places interns within the Engine group, where hands-on learning and mentorship from experienced engineers are central. The internship is designed to help students develop technical skills while contributing to meaningful projects. What you will do Join a small, collaborative engineering team focused on improving SingleStore’s database engine Work on projects that span the full product life cycle, from design and coding to testing and deployment Explore technologies such as large language models (LLM) and vector indexing Enhance the fault tolerance of SingleStore clusters Optimize SQL query performance using methods like SIMD and LLVM code generation Develop modules for query optimization, including search and costing components Write and test software, gaining exposure to both technical and business aspects Interns can expect support from engineers who value mentorship and professional growth. There are also opportunities to learn about other business areas, including product, marketing, and sales. Teamwork and celebrating shared successes are part of the culture, with group meals and outings in and around Lisbon. Requirements Currently enrolled in a Bachelor’s program in Computer Science, Computer Engineering, Electrical Engineering, or a related field Strong understanding of computer science fundamentals Proficiency in C++ or C Interest in building reliable software Solid grasp of algorithms and data structures Preferred experience Previous internship in software development

About UsAt Cloudflare, we are dedicated to creating a better Internet. As one of the world's largest networks, we empower millions of websites and online properties for a diverse range of clients, from solo bloggers to Fortune 500 enterprises. Our technology accelerates and protects Internet applications without the need for additional hardware, software installation, or code alterations. Every Internet property utilizing Cloudflare benefits from our intelligent global network, which continually enhances its capabilities with each request, leading to improved performance and reduced spam and attacks. We've been recognized as one of Entrepreneur Magazine's Top Company Cultures and ranked among Fast Company's Most Innovative Companies.We seek individuals who are proactive and innovative, ready to tackle the challenges of the Internet rather than settling for the status quo. We value those with a keen eye for identifying common issues and a curiosity driven by AI to develop solutions using cutting-edge tools. Our culture thrives on iterative improvement, leveraging AI to enhance our offerings today for a better tomorrow, and ensuring that all advancements, big or small, are shared across the team to foster collective growth. If you prioritize curiosity over rigidity and see AI as a collaborator in addressing complex problems, you will thrive here. Available Location: Lisbon, PortugalJob Title: Industry-Focused Analyst InternAbout The TeamThe CxO Transformation Partners (CXTP) team acts as trusted advisors to Cloudflare’s senior customers and prospects. We are a strategic group simplifying technical complexities while aligning solutions with large-scale business goals. Our mission is to unlock commercial outcomes by bridging the gap between deep technical expertise and executive-level strategies.About The InternshipThis internship focuses on conducting in-depth industry research and competitive landscape analysis to bolster our team's capacity to customize solutions and messaging for key markets. Key deliverables will include reports on cybersecurity trends, comprehensive mapping of offerings to industries, and competitive assessments. Your contributions will facilitate more informed and targeted engagements with executive customers and assist in the creation of thought leadership content, positioning Cloudflare as a leader in specialized cybersecurity.

iCapital Network is looking for an International Platform Operations Associate to join the team in Lisbon, Portugal. This position centers on supporting the operations group and maintaining efficient workflows across the company’s international platforms. Key responsibilities Assist with daily operations related to international platforms Contribute to the reliability and efficiency of core processes Collaborate with colleagues to address ongoing operational needs Location This role is based in Lisbon, Portugal.

Atto Trading is an innovative quantitative trading firm leading the way in global high-frequency trading strategies. We are looking for a talented C++ Software Engineer to become a key member of our expanding team in Lisbon, Portugal. This position requires on-site presence.Our diverse international team consists of experts in trading, statistics, engineering, and technology, allowing us to create a collaborative environment where we transform ideas into profits swiftly. We pride ourselves on our integrity, creativity, and dedication while tackling some of the most challenging problems in the industry.Key Responsibilities:Architect and implement high-performance components for our trading infrastructure.Develop cutting-edge high-frequency trading (HFT) systems in C++ focusing on low latency and high reliability.Write modern, efficient code, utilizing the latest C++ standards.Interact directly with advanced networking hardware through kernel-bypassing drivers.Conduct performance research to enhance our platform's speed and scalability.

Join Dashlane as a Staff Platform Engineer - Web and play a vital role in shaping our web platform. We are looking for a talented engineer who is passionate about building scalable and high-performance web applications while leveraging modern technologies. You will collaborate with cross-functional teams to design, develop, and maintain our platform, ensuring a seamless user experience.

Join our dynamic team at inetum2 as a Platform Engineer, where you'll play a vital role in the development and maintenance of innovative technology solutions. This position offers an exciting opportunity to work with cutting-edge tools and collaborate with talented professionals in a fast-paced environment.

Join Our TeamAt Mollie, we believe businesses deserve a seamless financial experience. Since our inception in 2004, we have been dedicated to transforming payments and money management into a hassle-free process for every enterprise in Europe.With over 250,000 businesses relying on our comprehensive platform for payment processing, money management, and growth, we pride ourselves on being straightforward, scalable, and designed with real-world businesses in mind.As one of the fastest-growing fintech companies in Europe, with over 900 dedicated employees across more than 12 locations, our success is driven by our talented team. We prioritize speed, purpose-driven development, and a genuine commitment to our customers. Whether addressing challenges, creating market-leading products, or exploring the potential of AI to enhance productivity, you will have the autonomy to innovate and the trust to deliver impactful results.If you are eager to expand your horizons, shape the future of fintech, and be part of a high-achieving team, we welcome you to apply.Your Role and ImpactAs a Platform Engineer on the Release team, you will oversee the software delivery pipeline, directly influencing the way Mollie delivers products to our extensive client base. Our commitment to reliability is paramount, and you will be instrumental in ensuring that our software is deployed securely and dependably, with robust rollback mechanisms in case of any issues.You will lead efforts to elevate Mollie’s reliability standards to the highest levels for our critical services. Operating in a GitOps environment, you will take charge of our continuous delivery platform, tackle intricate infrastructure challenges, and spearhead initiatives to implement canary deployments and feature flags across all vital services by year-end.What You Will DeliverContinuous Delivery Excellence: Ensure the scalability, reliability, and availability of our CD platform and supporting infrastructure leveraging GitLab, Argo CD, and GitOps methodologies.Advanced Deployment Strategies: Design, implement, and refine deployment strategies, leading our ambitious timeline to roll out canary deployments and feature flags throughout the organization.Reliability & Uptime: Advocate for high operational standards, contributing directly to Mollie's strategic objectives of achieving 4 to 4.5 nines of uptime for our critical services.Monitoring & Troubleshooting: Implement effective monitoring and alerting protocols to identify issues proactively. Troubleshoot, investigate, and resolve complex system challenges to maintain optimal performance.

Join Mollie as an Engineering Manager in our Platform Engineering team, where you will lead and inspire a talented group of engineers. You will play a crucial role in shaping our platform's architecture and driving innovation to ensure we deliver the best payment solutions for our customers.

Role Overview Renesas Electronics Corporation is looking for a Senior Software Engineer in Lisbon to help build and refine platform solutions used across a range of applications. This role involves close collaboration with colleagues from different disciplines to design, develop, and improve software that supports client requirements and drives system efficiency.

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 sosafe as the Team Lead Engineer for our innovative Messaging Platform. In this pivotal role, you will lead a talented team of engineers, driving the development and enhancement of cutting-edge messaging solutions. Your expertise will shape the direction of our platform, ensuring exceptional user experiences and seamless communication.As a leader, you will inspire and mentor team members, fostering a collaborative environment that encourages creativity and technical excellence. You will have the opportunity to work on complex challenges, implement best practices, and utilize the latest technologies to optimize performance and scalability.

Speechify is looking for a Software Engineer, Platform, to join the team in Lisbon. This position centers on building and refining the core platform that supports how users engage with Speechify’s products. The work directly shapes user experience and drives efficiency throughout the company. What you will do Develop and maintain essential platform features that enable Speechify’s products Collaborate with engineering, product, and design teams to deliver improvements Use modern technologies to create reliable, scalable solutions Share ideas and feedback to influence the platform’s direction Requirements Experience building software platforms or infrastructure Comfort working within collaborative and creative teams Interest in enhancing how people interact with technology Located in Lisbon, Portugal

About the Role The Platform Infrastructure team at iCapital Network is essential for ensuring smooth and secure operations in both production and development environments. This position leverages advanced cloud technologies to enhance our Platform Infrastructure strategy, focusing on market agility and lean operational principles, all while maintaining a strong commitment to quality. We are on the lookout for highly collaborative, innovative, and intellectually curious Platform Engineers who are eager to develop and deploy state-of-the-art cloud computing capabilities. In this multifaceted role, you will engage with various aspects of the business, making a significant impact. Responsibilities Design, maintain, and troubleshoot distributed systems, showcasing strong debugging skills. Foster collaboration between the Platform Infrastructure team and the Information Security Team to tackle security challenges related to the platform, CI/CD pipelines, and development tools. Champion security best practices by advocating for a shift-left approach and cultivating a robust security culture within the DevOps/Platform Infrastructure team. Create and sustain tools that enhance the development environment on MacOS and Linux, prioritizing developer productivity. Ensure site reliability by developing highly scalable systems that integrate resiliency and high availability. Develop software and tools to secure and automate cloud infrastructure, establishing software delivery capabilities with fully automated workflows. Oversee the design and operation of a Kubernetes environment for effective container management and orchestration. Demonstrate experience with distributed systems design and hands-on troubleshooting/debugging. Qualifications Minimum of 8 years of experience in DevOps or Site Reliability Engineering (SRE), with at least 4 years focused on AWS. Over 8 years of experience in CI/CD pipeline development using GitLab, GitHub, or related frameworks. At least 5 years of expertise in security best practices within AWS, including remediation of SecurityHub findings. 5+ years of experience utilizing DevSecOps tools, including SAST, DAST, and SCA tools. Strong background in microservices architecture (Docker, Kubernetes) in a production environment is highly desired. Extensive knowledge of Linux OS and proficiency in command-line/scripting along with configuration management principles. Working knowledge of relevant technologies and protocols.

About UsAt Riskified, we empower businesses to unlock their ecommerce potential by mitigating risks. Our platform is trusted by some of the world’s leading brands and publicly traded companies to safeguard against chargebacks, combat fraud, and enhance customer loyalty. Our AI-driven fraud and risk intelligence solutions analyze interactions in real-time, offering robust identity insights that help our partners succeed in the competitive online landscape. We proudly collaborate with renowned companies across various industries, including Acer, Gucci, Lorna Jane, GoPro, and many more.We cultivate a collaborative and dynamic work environment, where innovative ideas flourish and meaningful contributions are valued. Our commitment to teamwork and excellence drives us to make a lasting impact in the ecommerce space, making Riskified a workplace of choice.About the Role*** Please note that this position will be recruited, hired, and employed by a third party.We are in search of a skilled and passionate Senior Data Platform Engineer to enhance and maintain our core data platform products, ensuring optimal performance, scalability, and stability. As a data-driven organization, we are committed to managing an increasing influx of data daily.In this role, you will be a vital part of the Data Platform team, responsible for overseeing a large-scale production data platform that serves as the backbone of our products. You will develop self-service tools to enhance platform accessibility for users in our R&D and Analytics departments, and act as a knowledge hub, consulting and sharing your expertise with your colleagues.What You’ll Be DoingLead the development of AI-ready foundations for our data platform, focusing on data quality, contracts, observability, and self-service tools that empower machine learning and AI-driven initiatives.Manage, provision, and monitor various platform products.Enhance the application infrastructure tightly integrated with our Data Platform tools.Provide guidance to development teams and mentor fellow team members.Utilize your creativity to solve complex, high-scale data challenges.Research and evaluate new technologies, starting from POC to deployment.

The Product Engineer for New Product Development at Haworth International focuses on bringing innovative furniture concepts to life. Based in Lodz, this role ensures new designs are technically feasible and profitable, balancing creativity with practical engineering and cost considerations. Key responsibilities Product design and development: Use CAD software to create and refine furniture concepts. Develop detailed product specifications that reflect customer needs. Ensure each design meets standards for safety, efficiency, and effectiveness. Research and feasibility: Carry out research and feasibility studies to identify opportunities for new products or improvements. Analyze market trends and customer feedback to spot areas for growth. Prototyping and testing: Test prototypes to identify and resolve design issues. Evaluate prototypes for durability, functionality, and regulatory compliance. Quality assurance and compliance: Ensure all products meet required safety standards and regulations. Support testing and quality control to confirm product performance. Cross-functional collaboration: Work closely with design, production, marketing, and sales teams to align products with customer and business needs. Offer technical guidance to sales and marketing on product features and benefits. Production oversight: Oversee manufacturing and production processes, setting standards and seeking ways to improve efficiency. Analyze workflows to find cost-saving opportunities. Continuous improvement: Update and enhance existing products to stay competitive. Implement changes efficiently and cost-effectively, based on careful analysis. What this role involves Developing and implementing technical solutions for new furniture products Performing cost calculations to support product profitability Ensuring products comply with safety and quality standards Collaborating across teams to deliver products that meet customer expectations

Role overview Jobgether is hiring a Senior Software Engineer for Product Engineering in Portugal. This position focuses on building and refining products that address customer needs. Expect hands-on development work and frequent collaboration with colleagues from various departments. What you will do Design and develop software products, guiding new features from initial idea through to launch Maintain and improve existing solutions to support reliability and strong performance Collaborate with cross-functional teams to deliver well-tested releases Help advance engineering practices and processes Location This position is based in Portugal.

Join Cross Border Talents as a Software Engineer, where you will play a pivotal role in understanding project objectives and phase-specific requirements.Your key responsibilities will include:Grasping the overall project vision and contributing to phase-wise requirements.Executing tasks aligned with specific requirements and ensuring the quality and timeliness of deliverables.Collaborating with team leads and members to devise optimal solutions.Participating in the review of test plans for various phases and integrations.