Source Job

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.

SQL NoSQL Docker

18 jobs similar to Backend Engineer

Jobs ranked by similarity.

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.

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.

  • Build scalable backend services and APIs.
  • Create responsive dashboards and tools to manage automation systems.
  • Implement automation workflows to power real-time operations.

Base360.ai is an intelligent automation engine that connects data, orchestrates workflows, and powers large-scale operational systems.

  • 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.
  • Balance rapid development of MVPs and POCs for user research with building robust, long-term backend foundations.

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 AI tools that help care teams work smarter and spend more time with the children and families who need them most.

Spain 5w PTO

Seeking a Backend Engineer with 4+ years of experience to join the Noa Notes team. Focus on scalability, clean architecture, and the ability to ship iteratively while learning fast. Design and develop backend systems with a focus on scalability, reliability, and observability.

Docplanner is creating a healthcare ecosystem that seamlessly connects patients with doctors while integrating smart tools to provide quicker, more precise diagnoses and treatments.

Europe

  • Build the foundations that power our AI Agents at scale, designing systems for reliability, performance, and change.
  • Use modern AI tools in your daily work to explore designs, scaffold code, generate tests, and document decisions.
  • Expected to have solid engineering skills - clear contracts, readable code, strong test suites, observability, and maintainable architectures.

At Zowie, we’re revolutionizing how businesses interact with their customers by creating a future where AI Agents handle 100% of customer interactions.

$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

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.

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.

Brazil

Lead backend and API development for a cutting-edge, customer-facing chatbot platform. Design, build, and maintain production-grade APIs, webhooks, and integration services that power complex workflows. Collaborate with product and operations teams to implement conversation-driven flows and AI-powered endpoints.

Jobgether uses an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements.

Europe

As a Senior Software Engineer – AI Integrations, you will be responsible for building the connective tissue between our enterprise systems and our emerging AI platform layer. You will design and implement the APIs, service integrations, cloud functions, and orchestration patterns that allow AI agents to access the right data. You will ensure integration components are secure, well-tested, observable, and aligned with platform governance.

RWS unlocks global understanding by growing the value of ideas, data and content by making sure organizations are understood.

US Canada

  • Design, build, and maintain the backend services that power Hatch’s mobile apps and IoT-enabled devices.
  • Lead backend system design, define best practices, and mentor other engineers.
  • Guide cross-functional technical strategy to improve the overall platform.

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

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.

$156,000–$185,000/yr
US Unlimited PTO 12w maternity 6w paternity

  • Design, develop, and maintain backend services, APIs, and data pipelines that power Knock's customer-facing and internal applications.
  • Architect and build scalable backend services using Node.js and TypeScript, ensuring they integrate seamlessly with our frontend experiences.
  • Contribute to AI-powered features and initiatives, integrating AI services to enhance our risk analysis and decision-making capabilities.

Knock is redefining the home buying and selling experience. They are a passionate team of industry experts who knew there had to be a better, simpler way for people to navigate the journey between homes and have been honored as one of Inc.’s Best Workplaces six times in the past seven years.

$215,000–$240,000/yr

Design and evolve a real-time, globally distributed platform connecting devices, apps, and sensors to public safety. Lead strategic architectural decisions and align teams while designing real-time, low-latency systems. Guide and mentor engineers in adopting architectural best practices and best-in-class software development practices.

RapidSOS is an intelligent safety platform that harnesses artificial and human intelligence to fuse life-saving data and delivers it to public safety agencies.

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.

$160,091–$228,702/yr
5w PTO 26w maternity

  • Design and build reliable backend services that scale across millions of creators and episodes, enabling seamless podcast ingestion into Spotify.
  • Drive technical discussions, propose new ideas, and help shape the future of podcast infrastructure.
  • Collaborate closely with engineers, product managers, and multi-functional partners across the Podcast Mission.

Spotify transformed music listening forever when we launched in 2008 and our mission is to unlock the potential of human creativity.

US

  • Lead hands-on development of robust, scalable, and secure RESTful and event-driven APIs using FastAPI and OpenAPI 3.0+.
  • Own backend architecture and technical execution, serving as a primary contributor to the codebase.
  • Establish and enforce best practices for API design, versioning, documentation, and maintainability.

Truelogic is a leading provider of nearshore staff augmentation services headquartered in New York. Their team of 600+ highly skilled tech professionals, based in Latin America, drives digital disruption by partnering with U.S. companies on their most impactful projects.