Backend roles for English-speaking candidates working on APIs, services, databases, infrastructure, and distributed systems. This page is filtered to active listings in Frankfurt.
Seeking a freelance Junior Journalist to support AI training projects by crafting and evaluating human-like text in English for AI systems. This is a part-time, project-based role ideal for candidates with journalism or related backgrounds and strong English proficiency.
AI trainingCritical thinkingEnglish writing (C1/C2)Fact-checkingPrompt generationScore criteria definition
An international FinTech company based in Frankfurt is seeking an Analyst/Associate for Equity Index Structuring with a focus on thematic equity investment strategies. The role involves developing innovative rules-based equity index methodologies, translating emerging market trends into investable index strategies, performing back-testing, …
Equity investment productsPython programmingFinancial markets knowledgeIndex methodology developmentBack-testingThematic market research
Seeking a Senior Electrical Project Engineer to oversee electrical engineering projects from design through installation and maintenance across various sectors including industrial, healthcare, and commercial. The role involves managing technical documentation, coordinating with project teams, ensuring regulatory compliance, and maintaining project schedules …
Seeking a freelance material scientist with proficiency in Python to contribute to AI training projects involving engineering problem design, numerical simulations, and solution validation. Requires a degree in Material Science or related fields, 2+ years of relevant experience, and strong English skills …
Material SciencePythonNumerical MethodsEngineering DesignOptimizationSimulation
This opportunity involves contributing to project-based AI initiatives focused on testing, evaluating, and improving AI systems in collaboration with a global community of specialists. Tasks include designing computer science problems, validating AI solutions using Python and related libraries, improving AI reasoning, and …
Seeking a Senior Architect to contribute to technology vision and architecture for a leading European service management software company. The role involves driving cloud transformation, designing scalable and AI-integrated SaaS solutions, collaborating with technical leadership, and mentoring engineering teams to embed architectural …
Looking for a Software Engineer specialized in Applied AI to design and build software turning large language models into production-grade products. Responsibilities include backend service development, AI tooling, and user interfaces, focusing on scalability, performance, and safety. Requires strong backend programming skills, …
An internship opportunity in Fixed Income Index Management at a growing financial technology company in Frankfurt. The role involves supporting daily fixed income index tasks, automation of workflows, client request handling and maintaining data feeds. The ideal candidate is an economics, finance, …
Financial MarketsFixed Income ProductsIndex CalculationAutomationClient ReportingData Feed Maintenance
This freelance opportunity is suited for experienced Data Scientists with expertise in Python and SQL to work on project-based AI training tasks. The role involves designing computational data science problems based on real-world business challenges across various industries and verifying solutions with …
Join a fast-growing SaaS company in Frankfurt as a Working Student in Finance. Support accounting, reporting, payroll, and process automation tasks while gaining hands-on experience in a dynamic international team. Candidates should be enrolled in a relevant degree program, proficient in AI …
AccountingFinancial ReportingProcess DevelopmentAI ApplicationsExcelPower BI
An international FinTech company headquartered in Frankfurt seeks an intern to join their Equity Index Structuring team. The role involves developing equity index methodologies, performing back-testing of investment strategies, and supporting client interactions. The internship offers a dynamic environment with mentorship and …
PythonAnalytical ThinkingEquity Index MethodologiesBack-testingInvestment StrategiesCommunication Skills
Join a global freelance platform to work on AI training projects that involve annotating and evaluating content for artificial intelligence development. This remote, part-time role requires advanced English skills and offers the opportunity to contribute to cutting-edge AI technology and gain valuable …
EnglishData AnnotationAI TrainingAttention to DetailLogical ThinkingFact-Checking
Join a leading trading platform company in Frankfurt as a Working Student in Software Development. Contribute to the development and optimization of cutting-edge trading systems and collaborate with experienced developers to design software and architecture for a Java platform. Opportunities align with …
Join a project-based opportunity as a freelance Optical Engineer focused on designing complex optics problems to test and improve AI systems. Candidates will design physics-based problems involving mechanics, electromagnetism, thermodynamics, and quantum mechanics, simulating real research workflows. The role requires a physics …
Join a fast-growing, fully remote technology company focused on text-to-speech products used by millions globally. As a Senior iOS Software Engineer based in Frankfurt, Germany, you will lead engineering and product decisions, actively develop the iOS app, and collaborate with a dedicated …
This freelance legal consultant role involves project-based AI training tasks including generating challenging prompts for AI, evaluating AI-generated solutions, and improving AI reasoning based on US law expertise. The position requires a law degree within the US context, minimum 2 years legal …
US LawLegal AnalysisAI EvaluationPrompt EngineeringEnglish Proficiency C1/C2
Join a purpose-driven team focused on building a zero-emission future within the automotive sector, based in Offenbach am Main, Germany. The role involves developing and executing community growth strategies for the UK market, managing localized content, executing online and offline engagement campaigns, …
Community GrowthUser EngagementContent PlanningCampaign ExecutionEvent ManagementData Analysis
Seeking a freelance Junior Journalist to work as an AI Trainer on a project basis. The role involves crafting clear, fact-checked text to train AI models in reasoning and logic, generating challenging prompts, and defining scoring criteria for AI responses. Requires strong …
English writingJournalismCommunicationsCritical thinkingText evaluationAI training
Join a fast-growing tech company in Frankfurt focused on audio information and AI. The team builds core services and SDKs powering a popular product that makes audio information accessible and effective for millions, including people with learning differences. The role involves designing …
Join a fast-growing remote team developing web and Chrome extension products focused on text-to-speech technology used by millions globally. This role involves shipping production code, collaborating with product teams, contributing to product strategy, and building impactful user experiences in a high-growth startup …
JavaScriptReactJSReduxFirebaseTypeScriptProduct Development