About Us_// At Masabi, we’re driving the fare payment revolution, powering the journeys of millions all over the world. We build fare collection platforms that allow riders to seamlessly buy and present tickets for public transport either on their mobile phones, from a ticket machine, or even by tapping their bank card to travel. Our Justride platform is used in over 250 locations globally, including some of the largest cities in the world. With our industry-first mobile ticketing SDK, we’ve partnered with large players in the transport space, including Uber, Moovit and Transit. Your own journey is important to us too. Choosing a role here means joining a network of innovators from all walks of life; a group of passionate individuals who consistently deliver. Here, you’ll find the tools you need to build the career you want. Whether you’re taking the direct route or trying a new path, we’ll support you no matter what. The Role_// We’re looking for a Principal Engineer to join Masabi’s Architecture team.This is a senior role for someone who combines deep technical expertise with strong judgement and the ability to operate across teams. You’ll help shape the technical direction of Masabi’s platform while staying close enough to the detail to design, review and deliver meaningful technical work.Working across the engineering organisation, you’ll act as a senior technical leader: defining and evolving architecture, guiding complex decisions, and contributing hands-on where it matters most.The role suits someone who can move between system-level thinking and implementation, someone who understands trade-offs, can navigate ambiguity, and helps turn complex or loosely defined problems into clear, practical technical approaches.Location_// This role is available in a fully remote model for candidates based in RomaniaResponsibilities_Shape Masabi’s platform architecture, including platform blueprint definition, standards and best practicesDesign and deliver scalable, robust, cost efficient services aligned with platform blueprintStay hands-on in code and technical delivery, including reviews and targeted contributionsIdentify and work through complex platform challenges related to scalability, performance, resilience and costAct as a senior technical advisor across engineering teams, supporting and influencing technical decisions and ensuring Masabi standards are followedShape and contribute to technical roadmap planning and prioritisation of platform improvementsSupport RFP estimation and technical scoping for complex initiativesProduce clear, high-quality technical documentation and architecture artefactsImprove how architecture is understood and applied across engineering and the wider businessContribute to and help shape technical forums and working groups, including areas such as API and architecture governanceAbout You_You bring strong experience designing and evolving distributed systems and microservices architecturesYou’ve operated at Principal or Staff level, shaping technical direction across multiple teams or domainsYou are comfortable staying hands-on, contributing in code, design and delivery when neededYou have strong experience with cloud platforms (AWS preferred) and modern infrastructure practicesYou’ve worked on systems where scale, reliability, performance and cost trade-offs matter, and can navigate those decisions thoughtfullyYou have proven experience in data architecture (e.g. data platforms, pipelines, warehousing or data lakes)You can take loosely defined (early stage) business or technical problems and turn them into clear, actionable technical approachesYou communicate complex ideas clearly and effectively, and produce structured documentation that helps both technical and non-technical audiences make decisionsYou’ve contributed to engineering standards, architecture patterns or platform directionInterest in or exposure to AI-enabled systems, particularly understanding architectural implications in productionNice To Have_Experience with REST API design in complex, multi-service environmentsExperience breaking monolithic applications into microservices architecturesExperience with event-driven architectures (e.g. Kafka, schema governance)Experience improving cloud cost and system efficiency at scaleFamiliarity with a range of tools and technologies including:Development: Kotlin, JavaData storage: DynamoDB, MySQLInfrastructure as code and CI/CD: Terraform, GitLab CI/CD// You don’t need to have experience in every area listed above. If you bring strong fundamentals, good judgement and a willingness to learn, we’d still love to hear from you.Some of Our Benefits_25 days holiday per year plus the Christmas Shutdown (another 3-4 days)Premium medical care via Regina MariaMental health supportMenopause supportRegular social gatherings with a monthly allowance for each employeeUp to €1000 training budget per year€200 to spend on your home officeChoice of workstationAbility to work for up to 3 months per year from any country in the worldCareers at Masabi are for people going places - driven by a mission to make transit fair and accessible for all.// We are a network of innovators from all walks of life, passionate about making a difference. At Masabi, we operate with openness and trust, creating an environment where everyone feels empowered to bring their whole, authentic selves to work.Whoever you are, just be yourself.// We welcome applications from underrepresented groups, including disabled and neurodivergent people, and can make adjustments at any stage of the process. You’re also welcome to share your pronouns whenever you feel comfortable. Together, we simplify journeys, remove barriers, and improve daily life for millions.Why Join Masabi?Driven by Purpose – We believe in journeys made simple. The work isn’t always easy, but the best things never are.Encouraged to Accelerate – Masabi is going places and our people are in the driving seat. Whether you’re taking the direct route or exploring new paths, we support your journey.Advancing with Empathy – We put people first and foster a culture of learning, not blame. No matter your cargo, we share the load.We’re already powering journeys - are you ready to join us?