Jobs at Haystack

Intern Frontend Engineer

We're hiring on behalf of a Haystack partner! The Role Design, build, and maintain frontend features in React and TypeScript. Integrate user-facing components with backend services and LLM-driven agent workflows. Own a scoped, business-critical project from design through delivery. Participate actively in code reviews, design discussions, and sprint cycles. Write tests and contribute to documentation for owned features. Engage with backend, design, and product partners to ship work end-to-end. What You'll Need Currently enrolled in Computer Science, Software Engineering, or related field at rising-senior through in-progress master's level, or recent graduate. Demonstrated proficiency in Python, React, and TypeScript for production-quality frontend work. Working familiarity with Git, modern frontend build tooling, and standard development workflows. Working knowledge of, or hands-on exposure to, LLM-based agents, tools, or AI-driven application workflows. Strong written and verbal communication skills, particularly in technical contexts. Ability to operate independently, surfacing blockers proactively. What's On Offer Competitive hourly wage ($25/hour). Participation in annual corporate Success Sharing bonus program. Opportunity to gain experience with agentic AI products and internal tools. Mentorship and weekly check-ins. Apply via Haystack today!

Frontend Developer

We're hiring on behalf of a Haystack partner! The Role Provide subject matter expertise for front-end design and development tasks. Support process improvement, specialized studies, and definition of requirements. Perform engineering tasks including creating technical design drawings, mockups, and wireframes. Plan and implement modifications to Graphical User Interfaces (GUIs) and optimize UI elements. Optimize system navigation practices and elements to facilitate operator ease of use. Engage in agile, user-centric application design, ensuring best-of-breed UI/UX standards. What You'll Need Active TS/SCI clearance is required. Bachelor’s degree in a related field, or Master's degree substituting for 2 years of experience. 7 years of experience in the functional area, with 7 years in object-oriented and scripted languages. 3 years of recent experience in front-end web design and development. Experience with bug tracking software (Jira) and version control (GitLab). Proficiency with at least five of the following: Apache, Ember, JavaScript, Java, Node. What's On Offer Opportunity to contribute to critical national security and public service programs. Work in a fast-paced environment alongside dedicated professionals. Be part of a team committed to service, accountability, and results. Compensation package including short and long-term incentives. Apply via Haystack today!

Senior Frontend Engineer

We are working with a digital challenger in the energy market, making energy different for a young, urban, and digital generation. They provide private households and small to medium-sized businesses with energy from sustainable sources, offering customized electricity and gas tariffs, optionally combined with lifestyle products, all fully digital with a top-rated energy app. The Role Develop and continuously improve customer-facing experiences across web and mobile platforms Focus on usability, performance, and scalability to create an engaging end-to-end energy experience Build and maintain key customer journeys including login, account management, billing, payments, and self-service features Develop with Next.js / React and TypeScript using a component-oriented approach Integrate frontend applications with API-driven backends (GraphQL / REST) Collaborate closely with UX/UI Design, Backend, QA, and Platform Teams in Agile/Scrum setups What You'll Need Several years of experience developing production-ready frontend applications with React / Next.js and TypeScript Strong fundamentals in frontend development: component architecture, performance optimization, accessibility, and modern CSS AI-Native Developer Mindset with experience in agent-driven workflows using tools like Claude Code, Cursor (Composer), or Windsurf (Cascade) Experience with API-first platforms and authentication flows Pragmatic approach to testing and confident working in CI/CD driven teams Strong communication skills in German and English and a distinct ownership mindset What's On Offer A highly motivated team with flat hierarchies and short communication paths Workplace in the heart of Cologne with hybrid work options Performance-based pay and 30 days of annual leave Subsidized job ticket and free parking Apply via Haystack today!

Intern Frontend Engineer

We're hiring on behalf of a Haystack partner! The Role Design, build, and maintain frontend features in React and TypeScript. Integrate user-facing components with backend services and LLM-driven agent workflows. Own a scoped, business-critical project from design through delivery. Participate actively in code reviews, design discussions, and sprint cycles. Write tests and contribute to documentation for owned features. Engage with backend, design, and product partners to ship work end-to-end. What You'll Need Currently enrolled in Computer Science, Software Engineering, or related field at rising-senior through in-progress master's level, or recent graduate. Demonstrated proficiency in Python, React, and TypeScript for production-quality frontend work. Working familiarity with Git, modern frontend build tooling, and standard development workflows. Working knowledge of, or hands-on exposure to, LLM-based agents, tools, or AI-driven application workflows. Strong written and verbal communication skills, particularly in technical contexts. Ability to operate independently, surfacing blockers proactively. What's On Offer Competitive hourly wage ($25/hour). Participation in annual corporate Success Sharing bonus program. Opportunity to gain experience with agentic AI products and internal tools. Mentorship and weekly check-ins. Apply via Haystack today!

Frontend Developer

We're hiring on behalf of a Haystack partner! The Role Provide subject matter expertise for front-end design and development tasks. Support process improvement, specialized studies, and definition of requirements. Perform engineering tasks including creating technical design drawings, mockups, and wireframes. Plan and implement modifications to Graphical User Interfaces (GUIs) and optimize UI elements. Optimize system navigation practices and elements to facilitate operator ease of use. Engage in agile, user-centric application design, ensuring best-of-breed UI/UX standards. What You'll Need Active TS/SCI clearance is required. Bachelor’s degree in a related field, or Master's degree substituting for 2 years of experience. 7 years of experience in the functional area, with 7 years in object-oriented and scripted languages. 3 years of recent experience in front-end web design and development. Experience with bug tracking software (Jira) and version control (GitLab). Proficiency with at least five of the following: Apache, Ember, JavaScript, Java, Node. What's On Offer Opportunity to contribute to critical national security and public service programs. Work in a fast-paced environment alongside dedicated professionals. Be part of a team committed to service, accountability, and results. Compensation package including short and long-term incentives. Apply via Haystack today!

Frontend Developer

We're hiring on behalf of a Haystack partner! The Role Provide subject matter expertise for front-end design and development tasks. Support process improvement, specialized studies, and definition of requirements. Perform engineering tasks including creating technical design drawings, mockups, and wireframes. Plan and implement modifications to Graphical User Interfaces (GUIs) and optimize UI elements. Optimize system navigation practices and elements to facilitate operator ease of use. Engage in agile, user-centric application design, ensuring best-of-breed UI/UX standards. What You'll Need Active TS/SCI clearance is required. Bachelor’s degree in a related field, or Master's degree substituting for 2 years of experience. 7 years of experience in the functional area, with 7 years in object-oriented and scripted languages. 3 years of recent experience in front-end web design and development. Experience with bug tracking software (Jira) and version control (GitLab). Proficiency with at least five of the following: Apache, Ember, JavaScript, Java, Node. What's On Offer Opportunity to contribute to critical national security and public service programs. Work in a fast-paced environment alongside dedicated professionals. Be part of a team committed to service, accountability, and results. Compensation package including short and long-term incentives. Apply via Haystack today!

Intern Frontend Engineer

We're hiring on behalf of a Haystack partner! The Role Design, build, and maintain frontend features in React and TypeScript. Integrate user-facing components with backend services and LLM-driven agent workflows. Own a scoped, business-critical project from design through delivery. Participate actively in code reviews, design discussions, and sprint cycles. Write tests and contribute to documentation for owned features. Engage with backend, design, and product partners to ship work end-to-end. What You'll Need Currently enrolled in Computer Science, Software Engineering, or related field at rising-senior through in-progress master's level, or recent graduate. Demonstrated proficiency in Python, React, and TypeScript for production-quality frontend work. Working familiarity with Git, modern frontend build tooling, and standard development workflows. Working knowledge of, or hands-on exposure to, LLM-based agents, tools, or AI-driven application workflows. Strong written and verbal communication skills, particularly in technical contexts. Ability to operate independently, surfacing blockers proactively. What's On Offer Competitive hourly wage ($25/hour). Participation in annual corporate Success Sharing bonus program. Opportunity to gain experience with agentic AI products and internal tools. Mentorship and weekly check-ins. Apply via Haystack today!

Senior Frontend Engineer

We are working with a digital challenger in the energy market, making energy different for a young, urban, and digital generation. They provide private households and small to medium-sized businesses with energy from sustainable sources, offering customized electricity and gas tariffs, optionally combined with lifestyle products, all fully digital with a top-rated energy app. The Role Develop and continuously improve customer-facing experiences across web and mobile platforms Focus on usability, performance, and scalability to create an engaging end-to-end energy experience Build and maintain key customer journeys including login, account management, billing, payments, and self-service features Develop with Next.js / React and TypeScript using a component-oriented approach Integrate frontend applications with API-driven backends (GraphQL / REST) Collaborate closely with UX/UI Design, Backend, QA, and Platform Teams in Agile/Scrum setups What You'll Need Several years of experience developing production-ready frontend applications with React / Next.js and TypeScript Strong fundamentals in frontend development: component architecture, performance optimization, accessibility, and modern CSS AI-Native Developer Mindset with experience in agent-driven workflows using tools like Claude Code, Cursor (Composer), or Windsurf (Cascade) Experience with API-first platforms and authentication flows Pragmatic approach to testing and confident working in CI/CD driven teams Strong communication skills in German and English and a distinct ownership mindset What's On Offer A highly motivated team with flat hierarchies and short communication paths Workplace in the heart of Cologne with hybrid work options Performance-based pay and 30 days of annual leave Subsidized job ticket and free parking Apply via Haystack today!

Intern Frontend Engineer

We're hiring on behalf of a Haystack partner! The Role * Design, build, and maintain frontend features in React and TypeScript. * Integrate user-facing components with backend services and LLM-driven agent workflows. * Own a scoped, business-critical project from design through delivery. * Participate actively in code reviews, design discussions, and sprint cycles. * Write tests and contribute to documentation for owned features. * Engage with backend, design, and product partners to ship work end-to-end. What You'll Need * Currently enrolled in Computer Science, Software Engineering, or related field at rising-senior through in-progress master's level, or recent graduate. * Demonstrated proficiency in Python, React, and TypeScript for production-quality frontend work. * Working familiarity with Git, modern frontend build tooling, and standard development workflows. * Working knowledge of, or hands-on exposure to, LLM-based agents, tools, or AI-driven application workflows. * Strong written and verbal communication skills, particularly in technical contexts. * Ability to operate independently, surfacing blockers proactively. What's On Offer * Competitive hourly wage ($25/hour). * Participation in annual corporate Success Sharing bonus program. * Opportunity to gain experience with agentic AI products and internal tools. * Mentorship and weekly check-ins. Apply via Haystack today!

Senior Project Manager

Business Analyst

Business Analyst