Date: 16.06.2025 Job Description: Senior Full Stack Engineer – AI Startup – Up to 130k ?? Location: London, flexible working arrangements, ideally 1/2 days in office Tech Stack: Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our Y Combinator-backed client is building an elite engineering team within the AI space. The platform is used globally and delivers high impact to More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Generative
take full ownership, and care about building things that actually work —this one’s for you. What you'll do: Ship full-stack features using modern tools (Python, TypeScript, FastAPI, Node.js, etc.) Rapidly prototype, test, and iterate based on user feedback Design secure, scalable cloud-native systems Collaborate on product roadmap and tech strategy Contribute to AI-first tooling (including More ❯
take full ownership, and care about building things that actually work —this one’s for you. What you'll do: Ship full-stack features using modern tools (Python, TypeScript, FastAPI, Node.js, etc.) Rapidly prototype, test, and iterate based on user feedback Design secure, scalable cloud-native systems Collaborate on product roadmap and tech strategy Contribute to AI-first tooling (including More ❯
09.07.2025 col-wide Job Description: Senior Software Engineer – AI Startup – Up to 120k ?? ?️ Location : London, flexible working arrangements, ideally 1/2 days in office ? Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used across the globe and is More ❯
their small, high-trust team in London. As the third engineer on the team, you’ll: Design, build, and deliver product infrastructure from front to back using Python, React, FastAPI, and Postgres Collaborate directly with the CTO and founding engineers in a fast-moving, deeply technical environment Shape and influence a greenfield platform that’s still pre-launch, with rapid More ❯
their small, high-trust team in London. As the third engineer on the team, you’ll: Design, build, and deliver product infrastructure from front to back using Python, React, FastAPI, and Postgres Collaborate directly with the CTO and founding engineers in a fast-moving, deeply technical environment Shape and influence a greenfield platform that’s still pre-launch, with rapid More ❯
Computer Science, Software Engineering, or related field. Commercial software development experience, ideally with exposure to ML/AI systems. Strong programming skills in Python; familiarity with web frameworks (Flask, FastAPI). Understanding of model inference lifecycles, APIs, and data validation. Familiarity with Git, CI/CD pipelines, testing, and performance profiling. Ability to work independently and deliver clean, maintainable, production More ❯
London, England, United Kingdom Hybrid / WFH Options
Deluxerv
blockchain products and smart contracts Implementing REST API Requirements 3+ years of experience in software engineering Fluency in Python as well as SQL Experience with Python web frameworks (Flask, FastAPI, Django etc.) Knowledge of cloud infrastructure Offer/Benefits Competitive salary ($75k-$150k) subject to experience Flexible remote working opportunities 30 days of holiday allowance If this is the role More ❯
hands-on experience in Python, ML, and NLP/LLMs Familiarity with open-source LLMs (e.g., LLaMA, Mistral, Qwen) and RAG pipelines Experience building APIs and interactive tools with FastAPI, Streamlit, or Gradio Solid understanding of AI infrastructure, including GPUs and Docker Comfortable working with unstructured data sources like PDFs, emails, and OCR Proficient in Git, SQL, and handling a More ❯
a Fit If You Have 3–7+ years of experience as a software engineer working on production-grade applications Expertise in at least some of our core stack: Python, FastAPI, React, Next.js, TypeScript, Postgres A product-minded engineering approach – you care about what gets built and why Experience building platforms or internal tools, ideally in a startup or fast-paced More ❯
a Fit If You Have 3–7+ years of experience as a software engineer working on production-grade applications Expertise in at least some of our core stack: Python, FastAPI, React, Next.js, TypeScript, Postgres A product-minded engineering approach – you care about what gets built and why Experience building platforms or internal tools, ideally in a startup or fast-paced More ❯
Computer Science, Software Engineering, or related field. Commercial software development experience, ideally with exposure to ML/AI systems. Strong programming skills in Python; familiarity with web frameworks (Flask, FastAPI). Understanding of model inference lifecycles, APIs, and data validation. Familiarity with Git, CI/CD pipelines, testing, and performance profiling. Ability to work independently and deliver clean, maintainable, production More ❯
are looking for 5+ years of industry experience and having built systems of reasonable scale. You should be familiar and have experience with the main backend technologies we use: FastAPI, Python3, Docker, Postgres, Redis. In particular, you should have experience debugging, scaling, and optimizing APIs, databases, and pipelines as traffic grows to multi-TB scale. It would be great if More ❯
hands-on experience in Python, ML, and NLP/LLMs Familiarity with open-source LLMs (e.g., LLaMA, Mistral, Qwen) and RAG pipelines Experience building APIs and interactive tools with FastAPI, Streamlit, or Gradio Solid understanding of AI infrastructure, including GPUs and Docker Comfortable working with unstructured data sources like PDFs, emails, and OCR Proficient in Git, SQL, and handling a More ❯
proficiency in Python and/or Java. Advanced working level knowledge and experience in building and configuring highly automated cloud-based systems in a microservices-based architecture. Experience with FastAPI, Litestar, Django or other web frameworks. Advanced working level knowledge and experience in relational and non-relational databases. Experience working with multiple small and medium sized project-based teams, in More ❯
London, England, United Kingdom Hybrid / WFH Options
Tangible
to production You have experience with LLM evaluation and the development lifecycle of LLM features You are really comfortable working with Python and building APIs using frameworks such as FastAPI or Django Please mention the word ‘crane’ in your application. Nice-to-haves You have experience working with Google Cloud Familiarity with Go, Typescript What working at nPlan will be More ❯
and real-time data tools. Collaborate with AI and predictive modeling experts to create impactful applications to positively impact the lives of millions of people Drive innovation using Python, FastAPI and AWS infrastructure tools (EC2, S3, RDS, Lambda, etc.), SQL/NoSQL What We're Looking For: Experience working with autonomy and taking the lead of back end development Experience … improving the scalability and performance of an application with a growing customer base. Expertise in Python and FastAPI, with a track record of developing high-quality APIs. Familiarity with the AWS stack and ideally serverless/lambda architecture Burns Sheehan Ltd will consider applications based only on skills and ability and will not discriminate on any grounds. More ❯
Company | B2B, Deep Tech, AI native 📏 Size | 10 people 🌱 Stage | Seed 🧢 Role | Software Engineer 🪜 Level | Mid to Senior 🎯 Areas | backend focus, data pipelines, infrastructure ✨ Tech | Python (FastAPI), Rust, SQL, AWS, Terraform 📍 Based | Shoreditch, London 💻 Working | flexible-hybrid/remote-friendly 💰 Offer | £80-95k Hi 👋 Workonomics are partnering with a deep - tech startup mapping how the global economy connects. Think … + embedding workflows work closely with R&D to put novel AI ideas into production shape the engineering culture at an early, high-impact stage Their stack includes Python ( FastAPI ), Rust , Polars , AWS , SQL , Terraform — with an in-house vector DB and orchestration layer. The roadmap is exciting, with lots of complex new features to build . ✅ This will suit More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Workonomics
Company | B2B, Deep Tech, AI native 📏 Size | 10 people 🌱 Stage | Seed 🧢 Role | Software Engineer 🪜 Level | Mid to Senior 🎯 Areas | backend focus, data pipelines, infrastructure ✨ Tech | Python (FastAPI), Rust, SQL, AWS, Terraform 📍 Based | Shoreditch, London 💻 Working | flexible-hybrid/remote-friendly 💰 Offer | £80-95k Hi 👋 Workonomics are partnering with a deep - tech startup mapping how the global economy connects. Think … + embedding workflows work closely with R&D to put novel AI ideas into production shape the engineering culture at an early, high-impact stage Their stack includes Python ( FastAPI ), Rust , Polars , AWS , SQL , Terraform — with an in-house vector DB and orchestration layer. The roadmap is exciting, with lots of complex new features to build . ✅ This will suit More ❯
both engineering and analytics, and is excited about building internal tools that directly improve product and customer experiences. You'll be working with a mature stack (Python, BigQuery, dbt, FastAPI, Metabase), and your day-to-day will include both writing production-level code and making data actually useful for decision-makers. Main responsibilities: Build, maintain, and optimize data pipelines using … Python and dbt Own and evolve the backend codebase (FastAPI, Docker) Ensure pipeline reliability, code quality, and proper testing/documentation Maintain and extend data models and the BI layer (Metabase) Collaborate closely with product, data science, and leadership on strategic data tools Design and deliver internal tools - potentially leveraging LLMs and OpenAI APIs Write clean, production-grade code with … Experience Required: 5+ years of Python , including writing production-level APIs Strong SQL and DBT for data transformation and modeling Experience with modern data stack components: BigQuery, GCS, Docker, FastAPI Solid understanding of data warehousing principles Proven ability to work cross-functionally with both technical and non-technical stakeholders Comfortable maintaining and optimizing BI dashboards ( Metabase preferred) Nice to have More ❯
London, England, United Kingdom Hybrid / WFH Options
Lendable Ltd
create tools to enhance productivity. This role will be key to us delivering as we expand further in both the UK and the US.**Our Tech Stack*** Python* Pytorch* FastAPI* AWS* Docker* Kubernetes* ArgoCD**What you’ll be doing/impact on objectives*** Develop key services that power our underwriting capabilities* Deploy, optimise, update and maintain our underwriting models & services … to more efficiently create the next generation of models**What we’re looking for*** Detailed knowledge of managing services in Kubernetes* Solid experience with Python web application frameworks like FastAPI* Strong engineering principles - design patterns, unit testing, code reviews* A keen desire to both learn from and upskill other team members**Nice to have*** Experience deploying models using GPU in More ❯
Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning Principal Engineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed by a … Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning More ❯
Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning Principal Engineer - We're working with a leading fintech scale-up that’s transforming how small businesses access finance. Backed by a … Principal Engineer – Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python | Django | FastAPI | AWS | Rust | Postgres | Event-Driven Architecture | Machine Learning More ❯
Principal Engineer - Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python Django FastAPI AWS Rust Postgres Event-Driven Architecture Machine Learning Principal Engineer - We're working with a leading fintech scale-up that's transforming how small businesses access finance. Backed by a … Principal Engineer - Lead Tech Strategy for a Profitable FinTech Scale-Up Hybrid (London) or remote within the UK Up to £140,000 per annum plus stock options Python Django FastAPI AWS Rust Postgres Event-Driven Architecture Machine Learning Burns Sheehan Ltd will consider applications based only on skills and ability and will not discriminate on any grounds. More ❯
