251 to 275 of 280 Python Jobs in the City of London

Role: Senior Data Engineer (Snowflake, SQL, Python) Day rate: £600pd-£650pd (Inside IR35) Contract: 3 months initial We are currently recruiting for a Senior Data Engineer to contribute to the design and development of a new Snowflake-based data platform, helping decide which technologies and architectures best serve our client … long-term goals. You will design, build, and maintain reliable data pipelines and integrations using Snowflake, Python, SQL, and C#. Skills and experience required: Strong proficiency in SQL, Python, and C# (including query optimisation and performance tuning). Experience with data modelling, ETL pipelines, and data integration. Proven ability ...

continuous innovation. Key Responsibilities Ensure maximum uptime of latency-sensitive trading platforms, proactively identifying and resolving production issues. Automate and enhance support functions using Python, SQL, and monitoring tools like Splunk and Grafana. Collaborate with traders, developers, and network engineers to troubleshoot live issues and optimise trading operations. Build, maintain … desks, products, and exchanges—delivering low-latency infrastructure and reliable integration. Ideal Candidate Profile 3+ years’ experience supporting high-performance trading systems in a Python and Linux-heavy environment. Proven expertise in FIX protocol, trading workflows, and exchange connectivity. Skilled in scripting for automation (Python, Bash) and familiar with tools ...

Founding FS Engineer (Python, NextJS, TypeScript) 👨🏽💻 (AI/LLMs) Salary up to £120k + Equity London - 2/3 days a week Can sponsor candidates already in the UK ✅ Opportunity to join a VC backed startup, building the future of LegalTech. 🧑🏻⚖️ With operations based in both … creating agents to handle complex legal processes. 🤖 What you'll do Contribute to the entire stack, from cloud infrastructure to prompting to UX (Python backend, Next.js with TypeScript frontend, PostgreSQL, SOTA LLMs. Deployed to Azure via IaC (Bicep) with CI/CD pipelines powered by GitHub Actions) Collaborate closely with ...

design and developer tooling Competitive compensation and long-term growth opportunities Your Responsibilities Build and maintain backend services, APIs, and data-processing pipelines using Python Develop and extend frontend applications using Next.js and React Design and maintain RESTful APIs and client–server integrations Write and maintain unit and acceptance tests … through deployment Ensure code quality, reliability, and maintainability across the stack You Will Bring 2+ years of professional experience as a software engineer Strong Python skills, including building production-ready services and APIs Experience developing frontend applications with React and Next.js Understanding of RESTful architectures and backend–frontend integration Familiarity ...

Senior Engineer (Python, TypeScript, React) Salary £100k + Options London - 3 Days a week Company Building infrastructure that enables proactive, preventative healthcare at national scale. Today, most healthcare systems are reactive acting only once patients are already unwell. This platform changes that, by helping primary care teams identify risk earlier … Design to refine requirements and solve real user problems Communicate clearly with stakeholders and keep delivery aligned with impact Technical Experience Strong experience with Python , TypeScript , and React Comfortable working in cloud environments (AWS preferred) Familiar with modern DevOps practices and production systems 3+ years of recent experience in relevant ...

Senior Site Reliability Engineer (AWS Python JS) - Lead Role - UK Location: London (Hybrid) Salary: £100k - £120k per year Do you have a software engineering background with a passion for infrastructure, and are you ready to take the lead in building a world-class Site Reliability Engineering function from the ground … deep-seated passion for infrastructure and systems. •You have significant commercial experience with AWS •You are comfortable and proficient with JavaScript (JS) and Python for scripting, automation, and tooling. •You thrive working independently and are eager to take ownership of complex, high-value projects. •You have the ambition and drive ...

different customer contexts and priorities Design and implement AI-enabled workflows that support decision-making and automation Build and maintain data integrations using Python, PySpark, SQL , and distributed systems Partner with customers to define success metrics and ensure solutions deliver real outcomes Feed learnings from the field back into … 4+ years’ experience in data engineering, analytics engineering, or similar roles Comfortable working with ambiguous requirements and evolving priorities Strong fundamentals in Python, SQL , and working with large or complex datasets The ability to explain technical concepts clearly to non-technical stakeholders A mindset oriented around ownership, problem-solving ...

Nancy • Write clean, testable C# code • Manage data persistence (EF Core, Dapper, or similar). • Implement authentication/authorization (e.g., Azure AD, JWT). · Python knowledge or coding experience is Preferable Front-End Development • Build interactive UI with React (≥ 18) using TypeScript. • Integrate React components into a .NET-hosted … best practices. --- 3. What we are looking for: We are looking for someone with a strong background in C# and React application development (preferably Python knowledge) This is a brand-new application in Fixed income ETF space, very ambitious project so the ideal candidate must be a self-starter ...

roles and help you get a step ahead. Learn the Command Line (*1.5 weeks) Learn Git & GitHub (*1.5 weeks) Learn JavaScript (*1.5 weeks) Learn Python 3 (*1.5 weeks) JavaScript forms the foundation of almost everything you see on the Internet. Therefore, this is an essential addition language in building your … programming and development foundation. Python is a highly versatile programming language and due to its relatively “easy to understand” commands now one of the most common programming languages used. You can use it for both small and complex tasks, and it is used across many different industries broadening your scope ...

modalities. Build and test: Prompt-level guardrails. Safety classifiers Behaviour-shaping or reward-modelling components. LLM and multimodal fine-tunes Adversarial robustness defences Use Python and modern ML frameworks (e.g., PyTorch, TensorFlow, JAX, HuggingFace). Contribute to creation of synthetic datasets, adversarial evaluation corpora, and scenario-based test sets. Help … closely with engineers, safety SMEs, and governance teams. Produce high-quality research insights to guide product and platform direction. Key Skills and Experience Strong Python programming skills and foundations in machine learning, LLMs, or multimodal AI. Understanding of ML concepts such as training, fine-tuning, optimisation, evaluation, and model drift. ...

real ownership over product and technical direction from day one. Responsibilities Build and ship core AI product features end-to-end. Work primarily in Python across backend, infrastructure, and integrations. Collaborate directly with customers to deliver real-world outcomes. Balance speed and scalability in a fast-moving startup environment. Tech … Stack Python (FastAPI), Postgres TypeScript, Next.js GCP, Kubernetes LLMs (OpenAI, Gemini), Speech-to-Text, Text-to-Speech Requirements 5–10 years of backend-leaning engineering experience. Strong Python experience. Some experience with LLMs or AI products. Early-stage startup experience strongly preferred. Having worked with customers is a plus. ...

London location – 3-5 days on site p/week Up to £80k DoE plus bonuses Active MoD DV clearance required Experience required in Python, SQL, and ideally Palantir Overview Our client is a secure-sector SME consultancy based in Central London who are looking to bring an experienced Security … consultancy, and wants exposure to modern data platforms and tooling. Required Skills & Experience Proven commercial experience as a Data Engineer Strong development skills in Python Advanced SQL skills with experience working on complex datasets Experience with core data engineering tools and technologies (e.g. ETL/ELT pipelines, data warehouses, orchestration ...

cleansing to standardisation, conformance and publishing Advanced knowledge of SQL for profiling, joins/merges, deduplication, anomaly detection, and performance tuning Scripting knowledge in Python for automation, parsing, rules engines, and data quality checks, ability to write maintainable code. Experience using Python packages for data wrangling (e.g. Pandas, Polars), modelling ...

scale our platform. Tech Stack: At least 4 years commercial experience with JavaScript or TypeScript and Node Exposure of Laravel and/or Python (Django or Flask a plus) Familiarity with Drupal and some knowledge of modern front-end frameworks (React, Vue, etc.) What You'll Do: Build scalable applications … using modern frameworks and clean architecture Contribute to backend services and APIs (Python or Laravel-based) Help re-platform and migrate to a modern stack Collaborate cross-functionally with UX, Product, and DevOps What We Offer: A supportive environment that encourages professional growth and continuous learning. An inclusive, collaborative culture ...

Founding BE Engineer (Python, FastAPI) Salary up to £85,000 +Equity London - 3 days a week Early stage MedTech Startup, building tools that help design better, fairer, and more effective clinical trials. Their work sits at the intersection of data, science, and human decision-making, which have a direct impact … have a direct impact on shaping the product and overall feel of the platform and useability. Design and build core back-end services in Python (FastAPI) Produce prototypes, including data ingestion pipelines, embedding workflows, and recommendation components Develop high-performance APIs supporting semantic search, clustering insights, and protocol-generation features ...

workflows using LangGraph and related tools. • Collaborate with cross-functional teams to integrate AI agents into real-world applications. • Write clean, efficient, and testable Python code. • (Optional) Apply data science techniques to train and fine-tune ML or deep learning models. Required Skills: • Strong proficiency in Python and related libraries. ...

native AI solutions. GenAI Implementation: Hands-on deployment of Azure OpenAI, Vector Databases, and RAG patterns. Data Engineering: Oversee large-scale data processing using Python and PySpark to support AI model fine-tuning. Leadership: Manage technical delivery teams and deliver upskilling sessions to the customer. Stakeholder Management: Gain consensus … technical roadmaps with diverse client groups. Technical Skills & Experience Core AI: Azure OpenAI, Prompt Engineering, Cognitive Search, Form Recognizer. Data/Coding: Expert-level Python, PySpark, and Vector DB integration. Ops: Practical knowledge of MLOps and LLMOps lifecycles. Security: Must hold active UK Government SC Clearance. Certifications Mandatory ...

addition to hands-on security implementation, you would be integral in secure software development lifecycle practices, working across the wider tech stack of Python, C++, and Kotlin/Java. They are my top paying client so we would be able to guarantee an uptick! Requirements At least 7 years … security or similar roles with significant practical experience in securing software development at scale. Proven record of development experience in development languages such as Python, C++, Rust, Go and Kotlin/Java. Strong technical background in software development, system architecture and security tools. Strong understanding of security principles, techniques ...

/compute-financial markets intersection. Clear path to VP/CTO leadership. What you’ll do Architect the full platform stack (Python, TypeScript, Golang) handling trading engine, pricing models, hedging mechanisms and marketplace functionality. Build scalable, low-latency systems for real-time order matching, risk management and market data distribution. … What you bring Deep platform/distributed systems experience in high-stakes environments (trading, fintech, infra or high-throughput services). Strong proficiency across Python/TypeScript/Golang (or equivalent polyglot stacks) with proven ownership of production-grade systems. Expertise in real-time systems, performance optimisation, fault tolerance ...

Senior Embedded Software Engineer Salary : Up to £100,000 Location : London - 3 days a week We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations ...

Senior Product Engineer (Python, React, TypeScript) Are you passionate about building world-class products that empower customers globally? Join a fast-paced, venture-backed AI technology company at a pivotal stage of growth! My client are a venture-funded AI startup — already recognised as a $Unicorn and most recently achieving … evolve and deliver real impact to enterprise customers. 🔍 About the Role We are looking for a Senior Product Engineer with a strong background in Python, React, and TypeScript , who thrives in a collaborative and fast-growing environment. 📌 What You’ll Do Build scalable and maintainable features across our core product ...

HTML/CSS, Python, Computer Science & Robotics Hours: 2–4 hours per week (flexible, with additional hours available) Location: Remote (online roles) and Southwark, SE London (onsite roles) Pay: Up to £25 per hour depending on experience (PAYE or Freelance) Contract Length: Flexible but at least 6–12 months About … Subjects You May Teach Depending on your skills and availability, you may teach one or more of the following: Online classes - HTML/CSS, Python, Computer Science and JavaScript (in the future) Onsite classes – students work on their own projects in Scratch, HTML/CSS, Python, Physical computing and robotics ...

Founding FullStack Engineer (VueJS/React, TypeScript,Python, FastAPI) Salary up to £95,000 +Equity London - 3 days a week Early stage MedTech Startup, building tools that help design better, fairer, and more effective clinical trials. Their work sits at the intersection of data, science, and human decision-making, which … direct impact on shaping the product and overall feel of the platform and useability. Design and build back-end services and APIs in Python (FastAPI) that power the core platform Develop front-end components in Vue.js , turning complex data and AI outputs into intuitive user experiences Own features ...

investment banking, helping turn market foresight into actionable intelligence. Key responsibilities • Design and deploy RAG pipelines, agentic workflows and LLM-based intelligence modules • Build Python-based AI components, APIs and microservices • Own evaluation frameworks, observability, guardrails and model governance • Integrate AI systems into production environments and enterprise workflows • Work closely …/external engineers • Translate financial-services use cases into practical AI features Key details • Working model: Hybrid (3 days/week, Central London) • Tech: Python, LLMs, RAG, agentic systems, vector stores, cloud • Visa: Cannot sponsor Interested? Please apply below. ...

production software. This is a hands-on role with real ownership and long-term impact. What you’ll be working on: Building clean, maintainable Python applications that scale with large biological datasets Designing and maintaining data pipelines that ingest, transform, and score scientific and clinical data Collaborating with scientists … support rapid growth and experimentation Setting high standards for code quality through reviews, discussions, and best practices You’ll thrive if you: Have strong Python experience and care deeply about clean, well-tested code Have 4+ years of professional software development experience Enjoy working in early-stage environments where your ...