2278 English-speaking jobs in Berlin

Freelance English writers train AI models by crafting text that teaches AI reasoning, logic, and clarity. Contributors create original, fact-checked responses, collaborate with Quality Assurance Specialists, and adhere to style and quality standards.

Develops and validates advanced converter systems for high power and high voltage applications across renewable energy, smart grids, and industrial systems. Leads design, optimization, and prototype validation, ensuring high efficiency and reliability. Requires a PhD or Master's degree in Electrical Engineering, Power Electronics, or a related field and several years of experience in converter development.

Freelance annotators review and classify text, images, or videos to train AI models. Projects may include rating content, evaluating accuracy, or identifying sensitive material. Requires a bachelor's degree, 1+ year of professional experience, advanced English proficiency, and strong attention to detail. Compensation is project-based and up to $22 per hour.

Research Assistant (f/m/d) to collaborate on research projects, contribute to publications, and present findings at seminars and conferences. Must have a postdoctoral research profile in mathematical statistics, nonparametric statistics, nonparametric Bayesian methods, and the mathematical foundations of machine learning.

DataForce by TransPerfect seeks doctoral-level STEM experts (Physics, Chemistry, Biology) to design complex scientific problems for AI training. You will create "stumper" prompts, test them against LLMs, document their failures, and provide expert solutions. Requires deep subject-matter expertise, scientific reasoning, and proficiency with digital documentation tools.

Lead Fullstack Engineer (f/m/x) will drive the modernization and cloud migration of a global trading platform. Responsibilities include enforcing architectural standards, migrating backend services, designing React-based web interfaces, and ensuring compliance with regulations.

The Leipzig Cohorts and Trial(ist)s (LeiCoT) program seeks a recognized medical specialist with a strong research background in metabolism, brain/heart, or cancer. The program offers a six-year, fixed-term position with 50% research and 50% clinical work.

Supports regional sales organizations in EMEA and other priority markets, shaping the go-to-market strategy for Battery Energy Storage Systems (BESS). Focuses on market development, commercial structuring, and deal support. Requires 5+ years of experience in the energy, power, or infrastructure sector, preferably with BESS, renewables, or grid technologies.

Freelance data annotators review and classify text, images, or videos to train AI. Projects are available on an as-needed basis and compensation varies. Requires a bachelor's degree, 1+ year of professional experience, advanced English proficiency, and strong attention to detail.

Senior Sales Manager will drive growth and performance of the wholesale business across key markets. Responsibilities include managing global key accounts, developing wholesale acquisition strategies, leading sales campaigns, and overseeing aftersales processes. Requires 5+ years of experience in wholesale sales management within the fashion, luxury, or premium retail industry.

Beauty Advisor needed with 1-2 years of cosmetic retail experience. Must have a passion for client service, artistry, and a proven track record of meeting sales targets. Responsibilities include delivering exceptional client service, providing product education, and maintaining visual merchandising standards.

Lead the German market expansion for a profitable, AI-powered EdTech company. Architect the DACH sales engine, mapping complex B2G environments and driving deals from cold outreach to signature.

Operations / Workforce Manager will oversee daily operations, workforce management, and process improvement. Requires a Bachelor's degree, 4-6 years of experience, and proficiency in project management and productivity software.

Partner Sales Executive will build and manage partner-led business in EMEA. Responsibilities include recruiting, onboarding, and enabling partners to achieve revenue and profitability goals. The role requires proven quota-exceeding experience, strong prospecting skills, and proficiency in various software applications.

Lead and coach a team of data scientists and operations research scientists to develop data-driven solutions and platforms for global logistics optimization. Collaborate with machine learning manager, product, and engineering teams to build and deploy machine learning and optimization services. Present actionable insights and influence strategic direction.

AI Engineer will design and implement AI/ML pipelines, including LLM-based applications and vector retrieval systems. Responsibilities include building production-grade AI integrations in Python, applying enterprise AI patterns, and collaborating with Data Scientists. Experience with LLMs, GenAI frameworks, and Python is required.

Appiness seeks a Head of Supply to design and scale a diversified, high-margin supply ecosystem for a next-generation app growth company. Responsibilities include identifying, evaluating, and activating new app networks, DSPs, CTV platforms, OEM partnerships, and premium inventory. The role requires deep experience in MMPs, incrementality logic, and mobile performance ecosystems.

Shape the content and evolution of our Security Awareness Service by creating engaging e-learnings, phishing awareness templates, and monitoring security trends. Translate emerging cyber threats into relevant content and leverage AI tools for content creation and personalization. Collaborate with Product Management and Customer Success to ensure content aligns with product direction and customer needs.

Interim Director of Business Operations needed for a 14-month contract. Manage financial operations, legal and compliance, and drive operational improvements.

Lead Product Designer needed to shape the entire product experience for a growing digital financial platform. Define design direction, own features from concept to launch, and build a scalable design system.