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$104,000–$156,000/hr

  • Design, build, and optimize high-performance systems in Python supporting AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
  • Improve reliability, performance, and safety across existing Python codebases

Python REST GraphQL API Data

20 jobs similar to Lead Backend Engineer - AI Tooling

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  • Design, build, and optimize high-performance systems in Python supporting AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
  • Improve reliability, performance, and safety across existing Python codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

  • Design, build, and optimize high-performance systems in Python supporting AI data pipelines and evaluation workflows.
  • Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control.
  • Improve reliability, performance, and safety across existing Python codebases.

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

  • Design, build, and optimize high-performance systems in Python supporting AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
  • Improve reliability, performance, and safety across existing Python codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

$141,487–$184,800/yr
Europe

  • Design scalable, future-proof data platforms optimized for AI research workloads.
  • Build efficient self-serve data processing pipelines leveraging GCP's advanced services.
  • Implement guardrails for cost, quality, and performance.

AssemblyAI is at the forefront of Speech AI, creating powerful models for speech-to-text and speech understanding via an API. They're a remote team of startup veterans and AI researchers looking to build one of the next great AI companies.

US Europe

  • Design, develop, and deploy AI-driven applications to make our software more accessible.
  • Own the software from requirements development through deployment and maintenance.
  • Design, build, test, and deploy a scalable system architecture.

Epistemix empowers organizations to make smarter decisions by simulating real-world outcomes using synthetic populations.

  • Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for large-scale data annotation , validation, and quality control
  • Improve reliability, performance, and safety across existing Rust codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They did not provide information about the size/employees and culture in the job description.

$104,000–$156,000/hr

  • Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows
  • Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
  • Improve reliability, performance, and safety across existing Rust codebases

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They focus on real production systems and high-impact research workflows across data, tooling, and infrastructure.

Spain

Architect, develop, and maintain scalable backend services for voice and chat AI applications. Lead the migration from PHP/HTTP to a real-time backend framework. Integrate 3rd party APIs such as Twilio (voice), WhatsApp, ElevenLabs, OpenAI and others.

Tuotempo transforms healthcare experiences through intelligent digital solutions, powering some of Europe and Latin America's leading healthcare institutions.

$104,000–$156,000/hr

  • Design, build, and optimize high-performance systems in Rust supporting AI data pipelines and evaluation workflows.
  • Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control.
  • Improve reliability, performance, and safety across existing Rust codebases.

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

  • Design, build, and optimize high-performance systems in C++ supporting AI data pipelines and evaluation workflows.
  • Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control.
  • Improve reliability, performance, and safety across existing C++ codebases.

Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next-generation models. They work on real production systems and high-impact research workflows across data, tooling, and infrastructure.

Europe Unlimited PTO

  • Architect, design, and build backend systems that transform our internal AI technology into a scalable, market-ready product.
  • Design and optimize APIs, database schemas, and data processing workflows that seamlessly integrate with our AI/ML pipelines.
  • Collaborate with the Product, Data, and Engineering teams to define technical requirements and deliver features that enhance our users’ experience and overall system performance.

Sword Health is shifting healthcare from human-first to AI-first through its AI Care platform. Sword Health has 1,000+ enterprise clients and has raised more than $500 million from leading investors.

$60–$90/hr

  • Evaluate AI-generated code across the full stack.
  • Design and build full-stack tooling for AI data annotation and quality control.
  • Review complex system designs providing feedback on scalability and performance.

Alignerr partners with leading AI research teams and labs to build and train cutting-edge AI models. The company offers hourly contract positions, emphasizing innovation and collaboration within the AI field.

Join Zapier’s AI Tasks team, where you’ll own the core AI surfaces that make our customers’ workflows smarter. Collaborate with AI experts, product managers, designers, and platform engineers to bring LLM-native workflows to life. Build and refine user-facing features and interfaces for initiating, monitoring, and guiding agent behavior.

At Zapier, we build and use automation every day to make work more efficient, creative, and human.

$130,000–$165,000/yr
US

  • Design, build, and operate the annotation tooling and data pipelines behind our routing sidewalk graph.
  • Create web tooling to add/modify map annotation needed by the routing service to avoid blocked or challenging areas.
  • Build performant, scalable APIs that serve map data to the routing engine and the robot fleet.

Serve Robotics is reimagining how things move in cities with a personable sidewalk robot designed to take deliveries away from congested streets.

US

  • Design, develop, and maintain scalable backend services and APIs, ensuring high performance, security, and reliability.
  • Build and optimize data pipelines to ingest, store, and serve large-scale datasets, including video and ML training data.
  • Own and evolve the foundational data model that powers the entire Frontera platform.

Frontera is reimagining how children with autism and other behavioral health needs get the care they deserve. They bring together clinicians, technologists, and autism specialists to build cutting-edge AI tools that help care teams, expanding access to high-quality services for families everywhere.

  • Architect and implement scalable AI platform services for LLMs and other AI models.
  • Apply LLMs and AI technologies to build and enhance intelligent product features.
  • Develop robust APIs and backend systems for seamless integration of AI-powered features.

ClickUp is creating the first truly converged AI workspace, unifying tasks, docs, chat, calendar, and enterprise search, all supercharged by context-driven AI.

Europe

  • Develop and maintain scalable Python applications.
  • Design and implement chatbot applications using generative AI technologies.
  • Act as a trusted advisor within the team, guiding best practices, raising risks early, and ensuring solutions meet both technical and business needs.

Provectus is an AI consultancy and solutions provider. They help companies across industries embrace AI and solve their most complex challenges.

Global

  • Work with teams to modernize platform components and refactor legacy code.
  • Improve APIs, frontend, backend, and CI/CD; ensure observability and security.
  • Establish AI-assisted development guardrails and champion these practices.

Gcore provides infrastructure and software solutions for AI, cloud, network, and security. They power real-time communication, streaming, enterprise AI, and secure web applications, with over 550 professionals globally and 210+ edge locations.

US Canada 11w maternity

  • Build FastAPI services, Pydantic models, evaluation tooling, integrations with device APIs, and guardrails to keep responses safe and useful.
  • Drive implementation for Phase 2 of the AI Sleep Chat targeting Q2 2026.
  • Translate voice/text commands into device API calls, design and implement multi-agent architecture for command processing pipeline.

At Hatch, they’re on a mission to help people build better sleep habits—so they can feel more focused, energized, and present in their lives.

Spain

  • Architect, develop, and maintain scalable, robust backend services, starting from our voice and chat AI applications.
  • Integrate 3rd party API integration such as Twilio (voice), WhatsApp, ElevenLabs, OpenAI and others.
  • Design, build, maintain, and improve multi-agent orchestration frameworks for AI-powered conversations.

Tuotempo is the trusted patient engagement platform powering some of Europe and Latin America's leading healthcare institutions.