javascript English-speaking jobs in Bielefeld

University Assistant Predoctoral role in Economics. Responsibilities include independent research for a dissertation, teaching in German/English, and departmental contributions. Requires a Master's in economics or related quantitative field.

Lead growth strategy for Power Grids services in the German-speaking market. Act as a market strategist and trusted advisor to utilities, TSOs, and industrial customers navigating the energy transition.

This role combines product management with engineering leadership, defining software vision and roadmaps. You will lead the Software Development team, manage the backlog, and drive the full software lifecycle using C# and agile methods.

Shape the architecture of a mission-critical Charge Point Management System (CPMS) and drive scalable, cloud-native solutions. You will maintain technical ownership of the CPMS, design system integrations, and establish standards for the system's SDLC. You will guide technical planning, conduct reviews, and ensure implementations align with quality expectations. Collaborate with DevOps Engineers on operational excellence, including reliability engineering, monitoring, and incident response. Communicate technical decisions and architectural rationale to stakeholders.

Business Development Representative Intern to build Juna AI's sales engine. Drive top-of-funnel activities, including lead generation, outreach, and qualifying leads in industrial manufacturing. Requires 1-3 years of B2B sales experience.

Lead AI Engineer to design, build, and ship generative AI and agentic solutions for clients. Contribute across the full development lifecycle, from prototyping to production deployment. Requires 3-5+ years in AI/ML engineering with German C1 proficiency.

Design and implement the ABB Robotics Operating System and enterprise performance framework. This global role establishes management routines, governance, and KPIs to drive fact-based decision-making and execution across the organization.

Legal Counsel provides German law advice on lending, product questions, and regulatory matters. Responsibilities include drafting agreements, advising on Civil Law and Banking Supervisory Law, and leading projects. Requires a 1st/2nd Legal State Examination and relevant banking experience.

Own product and enablement for AI software. Build customer-facing applications and internal tools. Ensure quality across software and ML capabilities. Requires broad backend/infra experience, strong Python, and modern frontend skills.

Ruby on Rails Engineer to develop and improve the private markets platform end-to-end. Work with Ruby on Rails, Heroku, PostgreSQL, Redis, Sidekiq, Git, and AWS. Design REST APIs and write clean, tested code.

Freelance Project Manager & Business Process Analyst to implement IT systems, automation, and AI tools. Requires 3-6 years in PM/BA, process modeling (BPMN), and writing business requirements. Fluent English and Russian.

Senior CRM Manager to own CRM analytics and execution across three brands and five markets, focusing on building AI-focused automation systems in Klaviyo. Requires deep Klaviyo experience and a strong analytical mindset.

Manage canteen operations, coordinate external service providers, perform office cleaning, and maintain company apartments. Requires organizational skills and a service-oriented approach.

Lead IT Engineer to set technical direction for corporate IT, owning architecture across identity, endpoints, networking, and cloud. Build foundations, pipelines, and engineering practices while leading major IT projects.

Software Engineer needed to build and own features across frontend and backend, turning user problems into software. Requires 2+ years of experience shipping web applications and comfort with AI development.

Intern in Global Sourcing & Procurement supports purchasing processes, from provider identification to contract arrangements. Candidates should study business administration or industrial engineering, be fluent in English, and have German proficiency.

Senior Software Engineer in MDM team. Provide technical direction, own solution design, and develop scalable software for high-volume data processing. Guide customer system migrations and define quality standards.

Shape the market direction for base station antennas. Develop customer-specific marketing strategies, engage stakeholders, and analyze market trends to drive business growth and innovation. RF/electromagnetics knowledge is required.

Postdoc position in Endosymbiosis Research. Contribute to projects investigating bacterial endosymbiont evolution using omics and molecular biology. Requires PhD in biology/biochemistry and experience in microbiology or cell biology.

Master's thesis on what-if reasoning in LLM agents for HEMS parameter evaluation using Time-Series Foundation Models via MCP. Investigate connecting TSFMs to LLM agents for intelligent energy management.