BJAK Logo

BJAK

Full Stack Engineer, AI systems

Reposted 16 Days Ago
Remote or Hybrid
Hiring Remotely in United Kingdom
Mid level
Remote or Hybrid
Hiring Remotely in United Kingdom
Mid level
Develop end-to-end AI product features by integrating LLMs and external tools, ensuring system reliability and performance across multiple tasks.
The summary above was generated by AI
About ActAI

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and they're not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.

Our product focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion. We believe products will greatly reduce hallucinations.

Our objective is to organise anyone's life, allowing us all to spend time on valuable and meaningful things.

 
Role

We are looking for a Full Stack Engineer - AI Systems to build the product layer that turns these capabilities into usable, production-grade workflows. This includes designing how agents operate, fail, recover, and deliver consistent value to users.

 
Focus
  • Build end-to-end product features across frontend, backend, and AI integrations

  • Design agent workflows that handle planning, tool use, failure, and recovery across multiple steps.

  • Integrate LLMs, memory, and external tools into systems that behave reliably under real-world conditions

  • Design real-time AI interactions with streaming, partial results, and tight latency constraints

  • Improve system reliability, observability, and fallback mechanisms

  • Collaborate closely with ML, backend, and product teams to ship features end-to-end

  • Continuously iterate based on real usage and failure modes

 
Ideal Experiences
  • Strong experience in full stack engineering (frontend + backend)

  • Solid understanding of system design and API architecture

  • Experience working with LLMs, RAG systems, or AI-powered applications

  • Ability to handle ambiguity and make pragmatic engineering decisions

  • Strong ownership - able to take features from idea to production

  • Comfort working in fast-moving environments with evolving requirements

 
Outcomes
  • Own and ship AI-native product features that move beyond chat into persistent, goal-driven workflows

  • Design and deploy agent workflows that reliably complete multi-step tasks across tools and sessions

  • Reduce latency and improve responsiveness of AI interactions while maintaining output quality

  • Build robust fallback and recovery mechanisms for LLM and tool failures in production environments

  • Improve the success rate and reliability of AI-driven workflows through iteration, evaluation, and monitoring

  • Establish patterns and abstractions for integrating LLMs, memory, and external tools into scalable product systems

  • Contribute to a product experience where AI feels proactive, consistent, and dependable over time

 
Tech Stack
  • Next.js

  • Python

  • NodeJs

  • Pytorch

  • OpenAI / Anthropic / open-source LLMs

  • SQl & noSQL

  • Kubernetes

  • Docker

 
How We Work

The best products today in the world were built by small, world class teams. We are a high talent density and hands-on team. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical product

 
Interview process

If there appears to be a fit, we'll reach to schedule 3, but no more than 4 interviews.

Applications are evaluated by our technical team members. Interviews will be conducted via virtual meetings and/or onsite.

We value transparency and efficiency, so expect a prompt decision. If you've demonstrated the exceptional skills and mindset we're looking for, we'll extend an offer to join us. This isn't just a job offer; it's an invitation to be part of a team that's bringing AI to have practical benefits to billions globally.

Similar Jobs

44 Minutes Ago
In-Office or Remote
Entry level
Entry level
Cloud • Information Technology • Internet of Things • Machine Learning • Software • Cybersecurity • Infrastructure as a Service (IaaS)
Mentorship opportunity for a senior-year student completing a 2027 graduation project in data science, machine learning, or AI. Responsibilities include developing ML and generative AI prototypes, processing and analyzing data, experimenting with LLMs and RAG, evaluating models, documenting findings, and collaborating with data science, MLOps, and cloud teams.
Top Skills: BertGptKerasLarge Language Models (Llms)MatplotlibNatural Language Processing (Nlp)PandasPlotlyPythonPyTorchRetrieval-Augmented Generation (Rag)SeabornTensorFlow
2 Days Ago
Remote or Hybrid
Senior level
Senior level
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
Lead product strategy and delivery for Mastercard's In Control virtual card platform. Translate business requirements into technical specs, work with engineering scrum teams, engage regional partners and customers, define platform vision for tokenized and virtual card payments, validate technical delivery, and drive go-to-market and product enhancements to grow B2B and T&E payment adoption.
Top Skills: AgilePayment ProcessingPme FrameworkScrumTokenizationUx/UiVirtual Card Platform
2 Days Ago
Easy Apply
Remote
United Kingdom
Easy Apply
Senior level
Senior level
Cloud • Security • Software • Cybersecurity • Automation
Conduct advanced application security research across GitLab’s DevSecOps and AI-powered platforms. Identify and exploit novel, systemic, and chained vulnerabilities; develop proof-of-concept exploits, testing methodologies, and research automation; assess AI attack vectors and open-source dependencies; drive remediation and security improvements; advise engineering teams, contribute to roadmaps, mentor researchers, and share findings with the security community.
Top Skills: Duo Agent PlatformGitlabGitlab DuoGoPythonRubyRustTypescript

What you need to know about the Bristol Tech Scene

Along with Gloucester, Swindon and Bath, Bristol is part of the "Silicon Gorge" tech hub, a region in the U.K. renowned for its high-tech and research-driven industries, with a particular emphasis on sustainability and reducing environmental impact. As the European Green Capital, Bristol is home to 25,000 cleantech companies, including Baker Hughes and unicorn Ovo Energy. The city has committed to achieving net-zero emissions within the next decade.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account