Senior Full Stack Engineer

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.

The role you'll play

We're launching a new team dedicated to modernizing and expanding one of our customer-facing tools — and we're looking for a Senior Full Stack Engineer to help build it from the ground up. This isn't a legacy product handoff: you'll be joining at the very start, shaping both the technical direction and the team culture from day one.

The current stack is Vue.js on the frontend and Python on the backend, but we're planning a migration to.NET in the near future. Because of this, we're looking for someone comfortable working across all three — Vue, Python, and.NET — who can help drive that transition while continuing to ship new features. As the senior engineer, you'll take a leading role in architecture decisions, technical direction, and mentoring as the team grows.

The team you'll be a part of

You'll be one of the founding members of a brand-new team, led by our Tech Team Lead. We're actively growing the team and expect to bring on a Product Manager and one additional Engineer alongside you. This means you'll have real influence over how the team is structured, how we work, and the technical foundations we build on — it's a rare chance to help define a team's culture and practices from the very beginning, rather than stepping into something already set.

If you want to make a difference, make it with us by...

• Developing and maintaining applications, including front-end interfaces, back-end services, and databases
• Contributing to the architecture, design and implementation of new features and improvements
• Implementing best practices for code quality, testing and deployment automation
• Ensuring high-quality software through active participation in code reviews
• Actively engaging in sprint retrospectives, refinements, daily stand-ups, and other team processes
• Taking full ownership of the products and solutions you develop, eliminating bugs early in the process through TDD/BDD and other tests
• Leveraging AI-assisted development tools and workflows to increase engineering velocity, while maintaining code quality and rigor
• Sharing knowledge and supporting fellow developers, QA professionals, and support teams
• Supporting team leaders with your expertise and assist in customer meetings
• Owning CI/CD pipelines to ensure seamless operations

In one year, you'll know you were successful if...

• You are fully integrated as part of the team and have built strong working relationships.
• You actively contribute to maintaining a positive, collaborative, and knowledge-sharing team atmosphere.
• You take full ownership of products and solutions, having delivered several major features to production with measurable impact.
• You share your expertise by mentoring mid-level and junior developers, helping them grow and succeed.
• You contribute to improving team processes, code quality, and technical decision-making.

Desired Experience And Competencies

What does it take to work for LanguageWire?

What you'll need to bring

• Motivational and engaging with a "can do" attitude, fostering a positive team environment.
• Strong problem-solving and communication skills.
• Solid understanding of software architecture, design patterns, and best practices.
• Extensive experience with C# and the.NET ecosystem (.NET Core/.NET 6+, ASP.NET Web API, etc.)
• Experience with Python
• Solid understanding of RESTful API design and integration
• Familiarity with asynchronous programming and performance optimization in.NET
• Responsible for front-end codebases using Vue.js and/or TypeScript, collaborating closely with full-stack and frontend developers
• Sound understanding of frontend build tools and state management (Vuex, Pinia, or similar).
• Experience with version control systems (e.g., Git) and CI/CD practices
• Experience with automated testing frameworks (unit, integration, and end-to-end).
• Comfortable working in agile development environments and participating in sprint planning, code reviews, and peer mentoring
• Ability to collaborate effectively in cross-functional teams, including product, design, and QA.
• DevOps experience: CI/CD pipelines, Infrastructure as Code (Terraform, Helm, etc.), Docker, Kubernetes, cloud services (Azure, AWS, or GCP).

This will make you stand out

• Knowledge of microservices architecture and event-driven systems
• Proficiency with relational databases, particularly MSSQL and/or PostgreSQL
• Hands-on experience with Entity Framework (EF Core) and LINQ
• Familiarity with message brokers (e.g., RabbitMQ, Kafka, Azure Service Bus)
• Strong focus on testing practices (unit testing, integration testing, test automation)
• Awareness of security best practices in software development
• Ability to mentor others and foster knowledge-sharing within the team

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 300 employees. Offices in Copenhagen, Aarhus, Stockholm, Varberg, London, Leuven, Lille, Paris, Munich, Hamburg, Kiev, Gdansk, Atlanta, Finland and Valencia
• We take care of our people and initiate many social get-togethers from Friday Bars a to Summer or Christmas parties. We have fun!
• 150 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
• We have a hybrid work model called FlexiWire. We offer weekly flexibility, working three days in the office and two days from home. Together with your team, you can coordinate which days to collaborate in the office.
• 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 customer's 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 don't understand. We believe relationships are based on honesty and responsibility, and being trustworthy reinforces an open, humble, and honest way of communicating. We care 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:

"Once the purpose & values project had been rolled out, I felt a stronger connection and more engaged. Within our team, we care for each other, help each other on tasks, projects and we value different opinions. We truly lift each other up to be our best and ambitiously strive towards constantly improving on a professional and personal level."

(Arpi, Application Support Team Lead, Valencia)

Yes, to diversity, equity