Full-Stack Developer (Lisbon)

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 1000+ 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 We're building the runtime for Mollie's next generation of internal tools — not just for engineers, but for everyone. When a finance analyst can deploy a fully working app with a single git push, that's infrastructure that creates real organisational leverage. This role is about building that foundation and keeping it running as adoption scales. The Compute & Onboarding team owns the runtime layer of Mollie's internal cloud platform — how workloads get deployed, discovered, and operated across our GCP environment. We're expanding to accelerate the Internal Hosting Platform (IHP): Mollie's answer to the question "what if anyone at Mollie — engineer, analyst, designer — could ship a full-stack internal application without touching Kubernetes or configuring cloud infrastructure?" Early adopters across Finance, Design, and Internal Audit are already building on the platform. We're scaling it to the rest of the company. About the role You'll be a builder and steward of the platform that turns "I have an idea for a tool" into "here's the link — it's running." That means extending the CI/CD layer, hardening the runtime (secret injection, access control, multi-tenant onboarding), and pushing the platform forward from static-file hosting toward full-stack, AI-native internal applications. You'll work closely with the people who use the platform — often non-engineers building with AI assistance — and translate their friction directly into engineering improvements. The feedback loop is tight. The impact is visible. The surface is genuinely greenfield. What you'll ship * Build and maintain the CI/CD integration that turns a commit into a deployed, shareable internal application * Implement self-service tenant onboarding — removing manual provisioning toil from the team * Add runtime capabilities: secure secret and environment variable injection, team-level access control, server-side application hosting * Write and maintain Terraform for platform infrastructure on GCP * Work with internal adopters — from engineers to analysts — to understand blockers and turn them into platform improvements * Contribute to platform reliability, observability, and lifecycle governance What you'll bring * 3–5 years of full-stack engineering experience, comfortable across the stack * Strong command of Terraform for infrastructure-as-code on a major cloud provider — GCP experience is a real advantage * Solid experience with CI/CD pipelines (we run on GitLab CI) * Backend experience in Node.js, Go, or Java — language matters less than engineering rigour and willingness to move in our stack * Frontend proficiency in TypeScript / React for internal UI work * Familiarity with cloud-native primitives: containers, managed databases, secrets management, IAM, access control patterns * Comfort working close to the user — this platform serves internal colleagues; you'll hear feedback directly and often Nice to have * Prior work building developer platforms, internal tooling infrastructure, or DevEx products * Experience with multi-tenant access control or identity integration patterns * Exposure to AI-assisted development workflows — our users increasingly build with AI agents, and understanding that context helps * Familiarity with GCP services (Cloud Run, Cloud SQL, GCS, Secret Manager, IAM) Why is this role different Most platform work is invisible. This isn't. You're building infrastructure for a new way of working at Mollie — one where every team, technical or not, can build and ship internal tools with confidence. The platform already has real users, real momentum, and direct CEO-level attention. You'll build things that your colleagues use every day. You're joining an established, high-trust team — but with a greenfield surface. No legacy to maintain. Real users to serve. A roadmap with clear phases and room to shape the next one. 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. 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.

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

Reaktor

Reaktor's tech community is looking for an experienced Senior Fullstack Developer to join one of our Business Units in Lisbon. If you are comfortable working across modern web applications, backend services and production systems, enjoy solving ambiguous problems with clients, and are curious to work in a low-hierarchy environment, you might just be what we’re looking for. You will support clients across a range of digital product, platform and service domains. The exact client context may vary from focused product teams to large international companies working on high-traffic, business-critical services. Many of our clients are technically mature and expect a high level of expertise from our consultants. This means you will need to be hands-on, pragmatic and comfortable helping both the client and the team make good technical decisions. YOUR DAILY TASKS MAY INCLUDE: * Building and improving modern web applications, backend services, APIs and data models * Working across frontend, backend and infrastructure depending on the needs of the client project * Helping clients choose suitable technologies, architecture and delivery approaches * Contributing to cloud environments, CI/CD pipelines, deployments and production quality * Debugging, testing, monitoring and improving production-grade systems * Working on products or tooling related to customer-facing services, internal platforms, identity, martech, customer support, analytics, online stores, integrations, developer tooling or SDKs * Collaborating directly with client tech teams, business stakeholders, designers, product people and other disciplines * Clarifying ambiguous requirements and turning them into working software * Taking responsibility for delivery while making sure the team is supported and no one is left behind * Using modern development practices, including openness to AI-assisted development tools and workflows TO THRIVE IN THIS POSITION, YOU’LL NEED: MUST-HAVES * Strong experience in modern frontend development, for example with TypeScript, JavaScript, React or comparable technologies * Strong experience in backend service development, for example with Node.js, Java, Kotlin, Scala, Clojure, Python or comparable technologies * Experience building, shipping and improving production-grade digital products * Comfortable working across the full delivery lifecycle, from implementation to testing, deployment and production quality * Understanding of cloud environments, CI/CD, deployments and how production systems are operated * Ability to work directly with clients, stakeholders and other disciplines in a senior, consultative role * Strong problem-solving skills and the ability to bring clarity to ambiguous product or technical situations * A hands-on mindset — you are technically credible, actively contribute to the work and help the team move forward * Fluent verbal and written English skills to collaborate in an international environment We do not have a hard requirement around years of experience, but we have noticed that this level of fullstack, client-facing and production ownership usually takes several years of professional experience to build. NICE-TO-HAVES * Experience from customer-facing digital products, online services, ecommerce, subscriptions, internal platforms, analytics, martech or similar product domains * Experience with high-traffic or business-critical production systems * Deeper experience with platform engineering, infrastructure-as-code or DevOps practices * Experience with customer-facing products, internal tools, integrations, SDKs or developer tooling * Familiarity with mobile development or React Native * Finnish language skills ADAPTABILITY Willingness to work in a hybrid setup. This means balancing office, client premises and remote work depending on the client project and team needs.