Network Development Associate

Nexxiot

Nexxiot is digitalizing freight asset management with technology that now oversees the world’s most extensive network of connected intermodal containers and railcars. Clients gain access to unparalleled real-time data, which streamlines fleet management and automates logistics processes. Nexxiot devices, built for resilience, withstand extreme conditions and provide long-term, detailed insights into cargo events, including impacts, delays, safety and security incidents, and loading activities. Based in Zurich, Switzerland, Nexxiot’s influence extends globally. Our team, comprised of industry experts, operates from offices in Europe and North America and maintains a presence in a majority of depots, ports, and rail yards. To learn more about how Nexxiot is leading the value generation for the rail industry, please visit www.nexxiot.com. THE ROLE We are an IoT startup turning massive-scale, low-power device data into real-world impact. With a fleet of more than one million connected devices, we generate high-volume telemetry every day. We are looking for a passionate Backend Developer to help enrich, transform and distribute this data in a flexible hybrid setup combining remote and in-office work from our new office in Portugal. You will join an interdisciplinary agile product team and contribute to the design, implementation and operation of distributed backend services. Together with your team, you will build reliable, scalable systems that process large volumes of device data and power customer-facing products. We are looking for someone curious, pragmatic and collaborative who enjoys solving complex problems, automating repetitive tasks, and continuously improving how the team works. YOUR RESPONSIBILITIES * Design and implement backend services, including tests and  technical documentation * Deploy and operate services using CI/CD best practices * Take end-to-end ownership across the full lifecycle: design, implementation, testing, deployment and operations * Monitor services and data streams and respond to anomalies * Provide 3rd-level support and ensure service availability during business hours * Review merge requests and design documents from teammates * Participate in agile software development activities (e.g. planning meetings, reviews, retrospectives…) REQUIREMENTS * 5+ years of professional software development experience * Strong experience with Kotlin or Java * Solid knowledge of backend architecture, distributed systems and API design * Experience with SQL (PostgreSQL) and/or NoSQL (DynamoDB) * Familiarity with messaging systems (Kafka, SQS, SNS) * Experience building and operating containerized services (Docker, Kubernetes, ECS or Fargate) * Solid understanding of software testing (TDD is encouraged but not mandatory) * Curious and never afraid of learning to master new tools, technologies, and methodologies * Fluent in English NICE TO HAVE: * Geospatial data experience * Gradle knowledge * Linux / Unix shell skills Work authorization: Applicants must be legally authorized to work in Portugal. Unfortunately, we are not able to sponsor visas for this role. OUR BACKEND STACK * Kotlin / Java  * Apache Kafka  * SQS  * DynamoDB  * CockroachDB * Gradle * Docker * Kubernetes

GoCardless

About us GoCardless is a global bank payment company. Over 100,000 businesses, from start-ups to household names, use GoCardless to collect and send payments through direct debit, real-time payments and open banking.  GoCardless processes US$130bn+ of payments annually, across 30+ countries; helping customers collect and send both recurring and one-off payments, without the chasing, stress or expensive fees. We use AI-powered solutions to improve payment success and reduce fraud. And, with open banking connectivity to over 2,500 banks, we help our customers make faster, more informed decisions. We are headquartered in the UK with offices in London and Leeds, and additional locations in Australia, France, Ireland, Latvia, Portugal and the United States. At GoCardless, we're all about supporting you! We’re committed to making our hiring process inclusive and accessible. If you need extra support or adjustments, reach out to your Talent Partner — we’re here to help!  And remember: we don’t expect you to meet every single requirement. If you’re excited by this role, we encourage you to apply! THE ROLE Data sits at the core of our mission. We leverage bank account data to deliver high-value, intelligent payment solutions for our customers, from enhancing payment success rates to driving payer fraud prevention. As a Data Science Manager within our Payment Intelligence team, you’ll partner with Software Engineers, Product Managers, and Designers to turn big ideas into reality. You’ll own the full lifecycle of our algorithms, shaping everything from the initial concept to production-ready code that powers our global payment network. At GoCardless, our stack is centered around Google Cloud Platform and Vertex AI, providing a high-performance environment for innovation. Our Data Scientists operate at the intersection of Python, SQL, and BigQuery to build and deploy high-performance models at scale. WHAT YOU’LL DO * Manage and mentor a high-performing team of Data Scientists, fostering a culture of technical excellence and supporting their long-term career development. * Oversee the end-to-end lifecycle of mission-critical ML models that power real-time payment decisions. * Shape the strategic roadmap for the Payment Intelligence space, translating complex data challenges into actionable, high-impact goals. * Drive cross-functional impact by working closely across disciplines to build end-to-end technical solutions, from concept to production. * Influence Senior Leadership by acting as the bridge between technical complexity and business value, communicating ML strategy to senior stakeholders. WHAT EXCITES YOU * Driving cutting-edge advancements in Data, AI, and Machine Learning within the payments space with a multidisciplinary team. * Mentoring a high-performing team and fostering a culture of technical excellence. * Solving the complex, real-time challenges of fraud prevention and payment optimisation at scale. * Building production-grade ML models on a streamlined GCP and Vertex AI stack to drive fintech innovation. WHAT EXCITES US * 2+ years managing Data Scientists within complex, high-stakes domains. * A hands-on leader comfortable diving into the codebase. You bring strong expertise in Python and SQL to oversee the full lifecycle of a model, from initial prototype to robust production deployment. * A decisive collaborator who can navigate technical trade-offs and translate complex ML concepts for cross-functional stakeholders and leadership. * Familiarity with complex data environments and model architectures, such as deep learning (experience in Fintech, Fraud Prevention, or Payments is a big plus).   Base salary range: €55,200 - €82,800 Please note this range is indicative. The budget for this role is flexible and will be shaped by the hiring process - we're open to discussing what's right based on the individual. Base salary ranges are based on role, job level, location, and market data.  Please note that whilst we strive to offer competitive compensation, our approach is to pay between the minimum and the mid-point of the pay range until performance can be assessed in role. Offers will take into account level of experience, interview assessment, budgets and parity between you and fellow employees at GoCardless doing similar work. (SOME OF) THE GOOD STUFF * Wellbeing - stay healthy with dedicated support and medical cover * Work away scheme - gives you the option to work away from your country of residence for up to 90 days in any 12 month period * Adaptive Working - allows you to work flexibly, around your lifestyle * Equity - all permanently employed GCs get equity to help you make a valuable contribution * Parental leave - to suit everyone embarking on life's great adventure * Learning Budget - lead your own development with an annual learning budget * Time off - generous holiday allowance, + 3 annual volunteer days, + 4 annual business-wide wellness days (‘GC Fridays’) LIFE AT GOCARDLESS   We're an organisation defined by our values; We start with why before we begin any project, to ensure it’s aligned with our mission. We act with integrity, always. We care deeply about what we do and we know it's essential that we be humble whilst we do it. Working this way creates the GC magic- the reason we all love showing up to work.  DIVERSITY & INCLUSION As of April 2025, we had 806 employees (GeeCees) globally, with 524 based in the UK, 163 based in Latvia and 119 across our other offices. To ensure that we're representative of the world around us - and to be able to review relevant benchmarks - we ask GeeCees to voluntarily disclose diversity data. This year, the proportion of GeeCees providing data increased to 88% (up from 79% in 2024). With regards to diversity within GoCardless, we can see GeeCees identifying as: Asian, Black, Mixed or Other — 25%  Neurodiverse — 9%  LGBTQIA+ — 9%  Disabled — 1%  Average age — 33 Female — 45% Male —  55%  We’re rooting for you during your application and GoCardless aims to provide reasonable adjustments to make our recruitment process as remarkable and accessible as we can. Please speak to your Talent Partner if you need extra support. If you want to learn more, you can read about our Employee Resource Groups and objectives here Sustainability We’re committed to reducing our impact on the environment, leaving a more sustainable world for future generations. Check out our sustainability action plan here. Find out more about Life at GoCardless via Twitter, Instagram and LinkedIn.

Mollie

Build with us Businesses deserve better from finance. Less friction, more freedom. Since 2004, Mollie has been on a mission to make payments and money management effortless for every business in Europe. Today, more than 250,000 companies trust our all-in-one platform to get paid, manage money and grow on their terms. Simple, scalable and built with real businesses in mind. We're one of Europe's fastest-growing fintechs, with 900+ Mollies across 12+ locations. Our people make this growth possible. We move fast, build with purpose and care deeply about our customers. Whether you're solving problems, building market-leading products or exploring how AI can make work smarter, you'll have the freedom to create and the trust to deliver. If you're ready to grow, shape the future of fintech and join an ambitious, high-performing team, this is the place for you. Your impact Mollie is evolving from a payment processor into a full financial services provider, and our infrastructure needs to be as ambitious as our vision. As Engineering Manager for our Edge & Network team in the Platform Engineering domain, you will lead the team responsible for the very entry point of our ecosystem. You’ll own the global traffic management, security, and connectivity that ensure our services are fast, reliable, and secure for hundreds of thousands of merchants. This isn't just about keeping the lights on; it’s about architecting a world-class platform that enables our product teams to ship with confidence. You’ll drive the technical roadmap for our edge services and service mesh, balancing high-performance engineering with a people-first leadership style. We’re looking for a leader who can mentor a high-performing team, bridge the gap between complex infrastructure and business value, and help us scale our network architecture to meet the next decade of growth. What you'll ship * Build and scale a high-performance Edge and Network platform that supports Mollie’s transition to a multi-service financial ecosystem. * Drive the evolution of our Service Mesh and global traffic routing to ensure 99.99% availability and seamless connectivity. * Deliver a developer-centric internal platform that allows engineering teams to manage their own network requirements with zero friction. * Lead and mentor a team of specialized engineers, fostering a culture of technical excellence and continuous delivery. * Optimize our edge security and WAF strategies to stay ahead of evolving threats while maintaining peak performance. What you'll bring * Proven experience leading and scaling infrastructure or platform engineering teams in high-growth environments. * Deep technical expertise in modern networking, including Service Mesh, Load Balancing, and Edge computing. * A strong track record of managing distributed systems on public cloud providers, specifically GCP. * Experience with Infrastructure as Code (Terraform) and a "platform-as-a-product" mindset to empower other developers. * Exceptional communication skills, with the ability to translate complex network architecture into clear business outcomes. Grow your way At Mollie, growth is personal. We believe everyone should have the chance to develop their skills, explore new challenges and shape their career on their own terms. You'll get regular feedback and performance reviews to support your development, with fair and transparent salary reviews along the way. Many Mollies move into new roles or take on new projects to stretch themselves, and we actively hire from within to help you take the next step. No matter if you're aiming for promotion, exploring a different career path or building new skills, you'll be supported with the tools, trust and opportunities to grow your way. Unlock your full potential and join us to eliminate financial bureaucracy If you're excited by the idea of building what's next, for yourself and for thousands of businesses across Europe, we'd love to hear from you. Apply with your CV (in English) using the form below. Want a peek behind the scenes? Check out what life at Mollie is really like. AI at Mollie We believe in Always Be Shipping, and AI brings that philosophy to life across every team, every role, every day AI is core to how we build. It helps us move faster, simplify work and make smarter decisions, creating real impact for the businesses we serve. We're looking for people who are excited to use AI to shape the future of finance with us.