Senior Full Stack Engineer

LanguageWire is a global leader in language and content services, dedicated to helping brands achieve their full global potential. Since our founding in 2000, we have continuously evolved and developed unique technology to facilitate seamless multilingual communication. Our worldwide network of language experts, coupled with an intuitive online platform, makes it effortless for brands to translate and manage multilingual content. Sound interesting? Yes? You should definitely read on! The role youll play As a Senior Full Stack Engineer, you will be responsible for designing, building, and maintaining scalable web applications and backend services that power mission-critical features. From shaping user experiences on the front end to optimizing service performance on the back end, youll work across the stack to deliver robust, high-quality software. Youll also play a key role in architectural decisions, mentor other developers, and contribute to improving development practices and team productivity. The team youll be a part of You will be part of the Products & APIs Team, responsible for building and maintaining LanguageWire Translate (core translation engine), along with the surrounding ecosystem of internal and external services. This includes robust APIs, intuitive web applications, and monitoring tools that ensure consistent performance and reliability. The team embraces a modern tech stack, values engineering best practices, and takes a research-informed, iterative approach to solving complex product challenges at scale You will collaborate closely with Tech Leads, Product Managers, Full-Stack Engineers, QA Engineers, Machine Learning Engineers, Data Engineers and reporting to your Team Lead. If you want to make a difference, make it with us by…

• Designing and delivering high-quality, user-centric features that have real impact across our global platform
• Building and maintaining full-stack applications across UI, services, and databases
• Designing robust, secure, and scalable APIs for internal and external consumers
• Driving improvements in code quality, performance, and system architecture
• Collaborating with product, QA, and engineering peers to build scalable, maintainable applications
• Leading by example in code reviews, mentoring, and technical decision-making
• Embracing DevOps principles to ensure reliable delivery and monitoring of services
• Actively contributing to agile ceremonies and continuous team improvement
• Taking full ownership of the solutions, you develop - "you build it, you run it"
• Driving technical excellence and ensuring smooth dev-to-prod workflows
• Supporting tech leads and occasionally engaging in customer-facing discussions
• Setting up and maintaining CI/CD pipelines for fast, reliable, error-free delivery
• Ensuring observability through structured logging, metrics, and monitoring

In one year, youll know you were successful if...

• Youve led the development of several key features from design to deployment
• Youve improved our architecture or dev practices in ways that enhanced team velocity and product stability
• Youve helped elevate the engineering culture through mentoring, reviews, and active collaboration
• Youve contributed to a fast, polished frontend experience using Vue and TypeScript
• Youve established yourself as a trusted contributor within a cross-functional team

Desired experience and competencies What does it take to work for LanguageWire? What youll need to bring

• Strong frontend development skills, with a focus on Vue.js and TypeScript
• Strong backend development skills using Python and FastAPI
• Strong understanding of scalable API design, REST principles, and microservices
• A motivational, proactive mindset with a collaborative “can-do” attitude
• Strong problem-solving skills and excellent communication abilities
• Solid understanding of software architecture, design patterns, and clean coding principles
• Hands-on experience with relational databases such as MSSQL or PostgreSQL
• Proficiency with DevOps tooling: CI/CD pipelines, Docker, Helm, Terraform, Kubernetes, and cloud services (Azure preferred)
• Familiarity with agile environments and experience participating in sprint planning, retrospectives, and code reviews
• A mindset of continuous improvement - both for yourself and for the systems you build

This will make you stand out

• Proven track record shipping high-quality full stack features end-to-end
• Expertise in Vue.js, .NET, and scalable API design
• Strong focus on observability, performance, and operational excellence
• A team-first mindset with a passion for mentoring and clean code

Our perks

• Enjoy flat hierarchies, responsibility and freedom, direct feedback, and room to stand up for your own ideas
• Internal development opportunities, ongoing support from your People Partner, and an inclusive and fun company culture
• International company with over 400 employees. Offices in Copenhagen, Aarhus, Stockholm, Varberg, London, Leuven, Lille, Paris, Munich, Hamburg, Zurich, Atlanta, Finland and Valencia
• For this role, we have a full-time FlexiWire@home option for remote work. Of course, you are always welcome at the office to collaborate and connect with your colleagues.
• We take care of our people and initiate many social get-togethers from Friday Bars a to Summer or Christmas parties. We have fun!
• 200 great colleagues in the Valencia office belonging to different business departments
• Excellent location in cool and modern offices in the city center, with a great rooftop terrace and a view over the Town Hall Square
• Private health insurance
• Working in an international environment—more than 20 different nationalities
• A dog friendly atmosphere
• Big kitchen with access to organic fruits, nuts and biscuits and coffee.
• Social area and game room (foosball table, darts, and board games)
• Bike and car parking

About LanguageWire At LanguageWire, we want to wire the world together with language. Why? Because we want to help people & businesses simplify communication. We are fueled by the most advanced technology (AI) and our goal is to make customers lives easier by simplifying their communication with any audience across the globe. Our values drive our behavior We are curious. We are trustworthy. We are caring. We are ambitious. At LanguageWire, we are curious and intrigued by what we dont understand. We believe relationships are based on honesty and responsibility, and being trustworthy reinforces an open, humble, and honest way of communicating. We are caring and respect each other personally and professionally. We encourage authentic collaboration, invite feedback and a positive social environment. Our desire to learn, build, and share knowledge is a natural part of our corporate culture. Working at LanguageWire — why we like it: “As a Senior Full Stack Engineer at LanguageWire, my day is dynamic and collaborative, particularly within the Machine Learning team. I work closely with Machine Learning Engineers to integrate advanced AI capabilities into our web applications and APIs, aiming to enhance customer experiences through innovative features. I also collaborate with other development teams to ensure seamless integration and alignment of our technology solutions, fostering continuous learning and driving the evolution of LanguageWires technology.” (Cristian, Senior Full-Stack Engineer, Poland) “What I enjoy the most about being a QA Engineer at LanguageWire is testing the products we provide to our customers. It feels rewarding to assure the quality and reliability of our designs. I also enjoy the teamwork involved in my job since I collaborate with many people, ranging from developers to product managers and linguists. In this way, I play a role in ensuring our projects success, which is incredibly gratifying. I love knowing my work influences the outcome of our production of high-quality products for our customers. I also have the opportunity to work with the latest technologies adds an exciting challenge to my role.” (Ricardo, Manual QA Engineer, Portugal) Yes, to diversity, equity & inclusion In LanguageWire, we believe diversity in gender, age, background, and culture is essential for our growth. Therefore, we are committed to creating a culture that incorporates diverse perspectives and expertise in our everyday work. LanguageWires recruitment process is designed to be transparent and fair for all candidates. We encourage candidates of all backgrounds to apply, and we ensure that candidates are provided with an equal opportunity to demonstrate their competencies and skills. Want to know more? We cant wait to meet you! So, why wait til tomorrow? Apply today! If you want to know more about LanguageWire, we encourage you to visit our website!