Backend Engineer

Docplanner; Barcelona; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading technology firm in Barcelona seeks a talented Backend Engineer to develop and maintain scalable backend services for AI voice and chat applications. The role involves migrating to modern architectures and integrating with various APIs. With a focus on innovation and team collaboration, this position offers a remote work option and competitive benefits.

Servicios

100% remote work

Stock options plan after 6 months

Extra day off for birthday

Mental wellbeing platform access

Comprehensive private health insurance

Formación

• 3 years of experience in Backend Engineering, preferably in Python or similar languages.
• Proven skills in building real-time APIs (websockets, streaming, etc.) and familiarity with async programming.
• Strong experience with modern backend frameworks (FastAPI, Flask, Django, etc.) and with AI/ML frameworks.

Responsabilidades

• Architect, develop, and maintain scalable robust 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.

Conocimientos

Backend Engineering

Python or similar languages

Real-time APIs

Modern backend frameworks

AI/ML frameworks

3rd party communications APIs

Voice technology APIs

Database technologies

Communication skills

Herramientas

FastAPI

Flask

Django

Docker

AWS

GCP

Azure

Descripción del empleo

We are seeking a talented Backend Engineer to help us architect and build the next iteration of our AI-powered voicebot and chatbot platform. You will drive the migration from our current PHP / HTTP stack to a modern scalable real-time architecture unlocking new capabilities and performance for our conversational AI products. Youll collaborate closely with AI engineers product managers and the broader engineering team.

Responsibilities

• Architect develop and maintain scalable robust 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.
• Implement real-time communication features (websockets streaming) conversation relays and advanced voice capabilities.
• Design build and maintain multi-agent orchestration frameworks for AI-powered conversations.
• Collaborate on CI / CD pipelines ensure robust monitoring logging and operational support.
• Write clear documentation and support knowledge transfer within the team.
• Work with AI / LLM engineers to facilitate seamless integration of AI modules.

Qualifications: Must-have

• 3 years of experience in Backend Engineering preferably in Python or similar languages
• Proven skills in building real-time APIs (websockets streaming etc.) and familiarity with async programming.
• Strong experience with modern backend frameworks (FastAPI Flask Django etc.) and with AI / ML frameworks (Langchain Langgraph)
• Hands-on experience working with LLMs (preferablyOpenAI) and knowledge of MCP.
• Experience integrating with 3rd party communications APIs. Previous experience with Twilio and / or Whatsapp is highly desirable.
• Experience with voice technology APIs and speech synthesis (e.g. ElevenLabs Google TTS). Experience with conversational interfaces is highly desirable.
• Experience in integrating LLMs and exposure to multi-agent architectures.
• Familiarity with database technologies (SQL and NoSQL).
• Strong communication and collaboration skills.

Nice-to-have

• Experience working with containerization (Docker) and cloud infrastructure (AWS GCP or Azure).
• Experience in CI / CD DevOps processes and testing tools.
• Previous work migrating legacy systems to modern stacks.
• Experience with conversational AI chatbots or voice assistants
• Experience with real-time speech processing TTS / STT and telephony systems and PBXs (Asterisk FreePBX etc.)

Additional Information

What we offer

We value a healthy work-life balance and long-term growth. Benefits vary by location but heres what you can expect :

Shared benefits

• 100% remote work with the option to join our offices in Bologna or Barcelona
• Stock options plan after 6 months
• One extra day off for your birthday
• Access to iFeel our mental wellbeing platform

Italy-specific

• 8 / day meal vouchers lunch is covered if youre in the Bologna office
• Private health coverage via Metasalute

Spain-specific

• Comprehensive private health insurance with Adeslas
• Flexoh flexible compensation platform
• Wellhub gym & wellness network membership
• Language courses

How does the recruitment process work

• Online test online async exercise to get a first sense of your tech skills.
• HR interview a friendly chat to get to know you your motivations and tell you more about Tuotempo our culture and the team.
• Technical interview with our TechManagers including practical exercises to evaluate your approach and problem-solving skills as a developer.
• Final interview a broader conversationto align on expectations and future growth. If its a match well move forward with the offer!

Remote Work : Yes

Employment Type : Full-time

Key Skills

Business Intelligence,Bidding,Accounts Assistant Credit Control,Account Development,Content Development,Lab Testing

Experience : years

Vacancy : 1