Toptal: Full-Stack Engineer (Python/React/GenAI)

Headquarters: Remote

URL: http://Toptal.com

About Toptal

Toptal is a global network of top talent in business, design, and technology that enables companies to scale their teams on demand. With $200+ million in annual revenue and team members based around the globe, Toptal is the world’s largest fully remote workforce.

 

​We take the best elements of virtual teams and combine them with a support structure that encourages innovation, social interaction, and fun. We see no borders, move at a fast pace, and are never afraid to break the mold.

 

About the client

Our client is a leading global consulting firm that delivers transformation programs for companies worldwide. They develop internal tools and client-facing web applications using modern full-stack development and Generative AI, focusing on automation, smarter decision-making, and enhanced user experiences.

 

About the role

We’re hiring Full-Stack Engineers (Python/React/GenAI) to join multiple production AI initiatives. You will collaborate with a multidisciplinary consulting team to build scalable web applications and integrate GenAI capabilities into business workflows.

 

This role is a great fit for engineers who like owning features end-to-end, collaborating with stakeholders, and shipping in a fast-moving environment. It’s also important to note: general full-stack experience alone isn’t enough. You’ll be expected to contribute both to new builds from scratch and to improving and expanding existing systems — including integrating GenAI features that will be used in production.

 

What success looks like:

  • Ship production-grade features end-to-end using Python (Django preferred) and React, including well-structured APIs and reliable deployments.

  • Deliver GenAI features in production (LLM interactions, workflow automation, data enrichment, RAG) with practical guardrails and evaluation.

  • Improve performance and maintainability by identifying bottlenecks, strengthening service boundaries, and contributing to CI/CD quality.

  • Collaborate effectively with distributed, cross-functional teams across multiple initiatives and geographies.

 

Responsibilities:

  • Develop, maintain, and optimize backend services using Python (Django preferred; Flask/FastAPI acceptable).

  • Build responsive, maintainable front-end interfaces using React.

  • Integrate Generative AI capabilities into existing and new applications (e.g., LLM interactions, workflow automation, data enrichment, RAG).

  • Design and implement REST APIs that connect front-end, back-end, and AI services.

  • Assist in testing, debugging, and deployment using modern CI/CD practices.

  • Collaborate with stakeholders to translate requirements into scalable, production-ready solutions.

 

Must have:

  • Experience of at least 3 years in the domain.

  • Solid hands-on understanding of Python (Django/Flask/FastAPI or similar).

  • High level of front-end familiarity with React (production web apps).

  • Hands-on experience building or integrating GenAI solutions in production (OpenAI/Azure OpenAI, LangChain, embeddings, vector DB, RAG).

  • Master the fundamentals of RESTful API/Service integration design.

  • Experience with databases: SQL and/or NoSQL.

  • Knowledge of cloud environments: AWS, Azure, or GCP. 

 

Nice to have:

  • Knowledge of MLOps workflows (model evaluation, monitoring, prompt/versioning, deployment patterns).

  • Experience in consulting or enterprise settings.

 

Important to note: 

  • Location: Brazil-based candidates ONLY (São Paulo & Rio areas)

  • Work model: Remote, with expected onsite visits a few times per month.

  • Type: Contract, 40h/week.

  • Duration: 6-12 months initially, with long-term engagement.

  • Authorization: Applicants must be authorized to work in their country of residence without employer sponsorship.

 

Why consider this opportunity?

  • You’ll get access to Toptal’s global network, including opportunities with Fortune 500 and other enterprise clients.

  • You’ll have flexibility to choose projects that match your goals — part-time or full-time, short-term or long-term (based on matching and availability).

  • There’s a potential path to direct employment with the client later.

  • The client may provide a Windows laptop.

 

To apply: https://weworkremotely.com/remote-jobs/toptal-full-stack-engineer-python-react-genai

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