Source Job

3w PTO

  • Design and implement full-stack features using Next.js/TypeScript + FastAPI.
  • Integrate LLMs into product workflows; craft and refine prompts optimized for iterative feedback, reliability, and scalability.
  • Work closely with product and design to test ideas and ship fast POCs → MVPs

Next.js React TypeScript Python FastAPI

20 jobs similar to Senior Full Stack Engineer

Jobs ranked by similarity.

LATAM

  • Design and deliver core functionality for a large-scale web application.
  • Lead architectural planning and create technical proposals.
  • Develop and maintain complex UI components, including CKEditor integrations and DocX formatting workflows.

At South Geeks, we connect top LATAM engineers with global teams that value autonomy, technical excellence, and long-term collaboration.

Europe

  • Spearhead the development of LLM-powered products at the forefront of marketing and advertising technologies.
  • Design, implement, and enhance our range of AI-driven solutions.
  • Collaborate with cross-functional teams to deliver robust and innovative solutions that drive tangible business outcomes.

Bluefish believes that AI represents the next major chapter of the internet – and that consumers will increasingly use AI to consume information and media online.

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

  • Designing and building AI-powered features and tooling used by customers and internal teams.
  • Owning fullstack solutions that include frontend, backend, and AI components.
  • Establishing patterns, guardrails, and examples that other engineers can safely build on.

FlowFuse is a company that builds real product features and internal tooling that apply artificial intelligence to practical user and engineering problems. They foster a remote, async-first environment across multiple time zones where pragmatic use of AI tools is encouraged to accelerate development and improve outcomes.

Europe 6w PTO

Help shape 0→1 products where AI meets commerce. Architect and implement full-stack features using Next.js. Partner closely with product, design, and growth to rapidly test hypotheses and ship improvements.

At ablefy, we believe that passion can turn into a career for anyone! With our cloud-based SaaS platform solution, ablefy.io, we offer an easy and efficient way for everyone to create and sell digital products and online courses.

  • 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 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.

  • Drive the development of intelligent, user-facing features using AI and LLMs.
  • Collaborate with product, design, and engineering teams to deliver AI-powered experiences.
  • Integrate multiple LLMs and AI models to deliver context-aware and personalized user experiences.

At ClickUp, they are not just building software, they're architecting the future of work with a converged AI workspace unifying tasks, docs, chat, calendar, and enterprise search.

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.

  • Design, develop, and deploy AI-driven applications and services.
  • Build and integrate LLM-based solutions using frameworks such as LangChain.
  • Collaborate with product managers, designers, and data teams to translate business requirements into technical AI solutions.

CI&T are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions. With over 8,000 employees around the world, they value diverse identities and life experiences, fostering a diverse, inclusive, and safe work environment.

  • 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.

$137,700–$182,426/yr
US

  • Contribute to building innovative software solutions for a global user base, focusing on localization and internationalization.
  • Collaborate with engineers, designers, and product managers to deliver high-quality features that leverage AI technologies.
  • Mentor other engineers, influence application architecture, and participate in on-call rotations to support platform reliability.

This position is posted by Jobgether on behalf of a partner company.

Canada Unlimited PTO

  • Development and deployment of LLM-powered features, including summarization tools.
  • Build backend services in Python that integrate ML/LLM models with Fullscript’s platform.
  • Collaborate with medical and product teams to deliver AI features for practitioners and patients.

Fullscript is a health technology company committed to helping people get better by connecting practitioners to products and patients to care plans. They empower over 125,000 practitioners and 10 million patients through their comprehensive platform.

$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.

  • Design, develop, and maintain full-stack features using Python on the backend and React with TypeScript on the frontend.
  • Build and evolve backend APIs and services to support complex workflows and integrations.
  • Contribute to system architecture, ensuring scalability, security, and maintainability.

Our client builds digital platforms for local governments, helping modernize public-sector operations with secure, scalable web applications.

Canada 3w PTO

  • Design, develop, and maintain end-to-end features for Cresta’s no-code processing platform.
  • Build intuitive UI components and visual editors for configuring conversation logic and workflows.
  • Architect and implement backend services and APIs to power a dynamic no-code interface.

Cresta is on a mission to turn every customer conversation into a competitive advantage by unlocking the true potential of the contact center.

$160,000–$190,000/yr

  • Design, implement, and deploy AI-powered features, including model training, fine-tuning, and prompt engineering workflows.
  • Translate product requirements into robust, production-ready AI solutions, working with Product Managers, Software Engineers, and Data Scientists.
  • Optimize models and infrastructure for scalability, latency, and cost efficiency, partnering with DevOps and MLOps to ensure reliable and maintainable AI pipelines.

Paper is reimagining how schools support students so that every learner can reach their full potential.

$155,656–$225,160/yr
Global

  • Build cutting-edge features for Poe, focusing on enhancing the Developer API and enabling third-party developers.
  • Prototype and implement new product features from ideation to production, using modern web technologies.
  • Collaborate with cross-functional teams to create innovative features and developer experiences with our APIs.

Quora’s mission is to grow the world's collective intelligence through Quora and Poe platforms.

  • Design and implement interfaces across the platform for compute orchestration and RL training.
  • Translate complex backend systems into intuitive, production-ready product experiences.
  • Build for technical audiences, including AI and general software engineers.

Prime Intellect makes frontier AI accessible to everyone and enables individuals/organizations to train models using their agentic training infrastructure.

Unlimited PTO

  • Build, ship and iterate on core product features using Next.js.
  • Own product modules end-to-end, from implementation to production rollout and iteration.
  • Implement responsive, accessible UIs using TypeScript, TailwindCSS, and established design systems.

Ruby Labs is a leading tech company that creates and operates innovative consumer products. They offer a diverse range of opportunities across the health, education, and entertainment industries; their teams are driving the future of consumer-led products.