Senior Software Engineer – Full-Stack, Media Translation

DeepL

. Architect and build complex, user-facing features across DeepL’s translation products .

Posted 9/18/2026full-timeLondon • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building complex user-facing features and backend logic for translation products, with a strong focus on performance, user experience, and collaboration across teams.

Highest-signal resume keywords

Front-End EngineeringFull-Stack FluencyReact UI DevelopmentPython Backend LogicC#/.NET Core Development

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Applicant Tracking System Keywords

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Hard Skills

Front-End EngineeringFull-Stack DevelopmentReactPythonC#/.NET CoreState ManagementAPI IntegrationPerformance OptimizationDocument ParsingTerminology Management

Soft Skills

CollaborationProduct-First Mindset

Industry Keywords

Translation ProductsUser ExperienceEnterprise WorkflowsLocalizationDocument Formats

Tech Stack

Tools & technologies

PythonReact.NET

About the role

Key responsibilities & impact

Architect and build complex, user-facing features across DeepL’s translation products
Build translation-flow interfaces and backend logic for complex document formats including PDF, Word, and PowerPoint
Preserve document formatting during parsing and translation
Integrate DeepL into enterprise workflows
Build consumer-grade interfaces for enterprise localization and collaboration workflows
Make technical decisions involving state management, API integrations, and performance
Prototype, measure user friction, and iterate quickly
Translate complex AI constraints into intuitive user experiences
Build transparency and performance metrics into the product
Collaborate with Research, Product, and Design teams

Requirements

What you’ll need

Strong front-end engineering experience
Full-stack fluency
Ability to build highly interactive, performant UIs in React
Ability to design supporting backend logic in Python and C#/.NET Core
Experience handling large document states
Experience managing complex terminology rules and Glossaries
Ability to maintain high browser performance
Product-first mindset focused on user adoption and reduced friction
Ability to make technical decisions regarding state management, API integrations, and performance
Ability to collaborate with Research, Product, and Design teams
No educational credential or minimum years of experience explicitly required

Benefits

Comp & perks

Hybrid work schedule with team members coming into the office twice a week
Flexible working hours
Virtual Shares for every employee
Regular in-person team events
Monthly full-day Hack Fridays
30 days of annual leave, excluding public holidays
Mental health resources
Competitive benefits tailored to location
Diverse and internationally distributed team
Open communication and regular feedback