BJAK Logo

BJAK

Full Stack Engineer, AI systems

Reposted 2 Months 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

2 Hours Ago
In-Office or Remote
EC1V 1, London, England, GBR
Senior level
Senior level
Cloud • Information Technology • Productivity • Security • Software • App development • Automation
Own EMEA Mid-Market sales readiness by identifying capability gaps, adapting global enablement programs, and delivering onboarding, coaching, facilitation, and manager reinforcement. Strengthen value-based selling and MEDDPICC execution, improve tool and AI proficiency, and measure impact through ramp time, pipeline quality, conversion, sales-cycle efficiency, and expansion metrics.
Top Skills: AIGongLinkedin Sales NavigatorOutreachSalesforceSalesloft
Yesterday
In-Office or Remote
London, Greater London, England, GBR
Mid level
Mid level
Artificial Intelligence • Machine Learning • Natural Language Processing • Software • Conversational AI
Supports and improves revenue operations systems and quote-to-cash workflows, including Salesforce, CPQ, billing, contracts, subscriptions, renewals, and usage-based monetization. Maintains data quality, builds reports and automations, troubleshoots GTM system issues, and partners with Finance, Sales, Customer Success, Renewals, and GTM Engineering. The role also identifies automation opportunities and supports forecasting, routing, territory, quota, and commission processes.
Top Skills: Ai AutomationClaudeCpqCursorN8NRetoolSalesforceSQLWorkato
Yesterday
Remote or Hybrid
UK
Entry level
Entry level
HR Tech • Information Technology • Professional Services • Sales • Software
Leads HiBob’s global customer marketing strategy, using lifecycle programs, customer data, and advocacy initiatives to drive product adoption, expansion pipeline, retention, and customer growth. Partners with Customer Success, Account Management, Product, RevOps, and regional marketing teams to create coordinated customer experiences, measure commercial impact, optimize programs, and develop a high-performing customer marketing team.
Top Skills: Customer Data AnalyticsMarketing AutomationProduct Usage AnalyticsRevenue Operations SystemsSaaS

What you need to know about the London Tech Scene

London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account