301 to 325 of 408 Python Jobs in the City of London

contributing not only to implementation but also to the design and refinement of pricing and liquidity models. The role combines research-oriented modelling in Python with production engineering in Java. You will use Python to analyse data, test ideas and support model development, while using Java to build and enhance … optimisation models within a high-performance Java framework Work alongside quantitative researchers to analyse large datasets and translate research into production-ready solutions Use Python for model prototyping, data analysis, signal investigation and backtesting activity Develop and improve pricing skew, spread and liquidity optimisation logic Design and implement automated hedging ...

Software Engineer – Java/Python London (On-site) This is a hands-on software engineering role within a systematic hedge fund where technology sits at the core of the business. The systems you build directly support trading, research, and core operations, and your work will have real, measurable impact. … join a well-established engineering team and work across a range of internal systems, primarily in Java, with exposure to Python and quantitative tooling. The role offers end-to-end ownership: taking requirements from idea through to production, working closely with engineers and business stakeholders to solve practical problems. ...

prepares for its next growth phase and Series A. The Role We’re looking for a Senior Software Engineer with strong TypeScript, Python and Node.js experience to help design and build core backend services powering the platform. This role has a heavy backend focus, working on APIs, distributed systems … data pipelines that process large volumes of external signals. What You’ll Work On • Designing and building backend services using Node.js, Python and TypeScript • Developing APIs and integrations with internal and external data sources • Working on data ingestion pipelines and event-driven systems • Writing clean, maintainable, and well-tested code ...

modern technologies and practices , promoting proportionate adoption of tools that add value. Technical Skills & Responsibilities: Intermediate to advanced practical experience with: React and TypeScript Python AWS services i.e. Athena/Glue, DynamoDB, ECS, S3, Lambda, SQS, Step Function, etc Automated testing frameworks for Python and JavaScript Terraform for infrastructure ...

optimisation. Collaborate with cross-functional teams including product, design, and data science to deliver innovative, customer-focused solutions. Work with modern technologies such as Python, Django, Cloud Firestore, BigQuery, and Elasticsearch to deliver scalable, reliable software. Contribute to continuous improvement by identifying opportunities to enhance system architecture and code quality. … Degree in Computer Science or equivalent industry experience. 3+ years' experience in backend software development within a fast-paced, agile environment. Strong proficiency in Python (or similar modern backend language) and experience building RESTful APIs or microservices. Solid understanding of data structures, algorithms, and software design principles. Experience with cloud ...

London 4 or 5 days a week on site Existing SC or DV Clearance is required National Security Sector Tech: JAVA/C++/Python - or Devops/Data Background An exciting opportunity has arisen for a Software Engineer to join a cutting-edge team developing impactful, mission-driven technology. … projects from initial concept through to delivery Analytical thinker who can decompose challenges and deliver iterative value Preferred Background Experience using Java, C++, or Python Understanding of data-intensive systems, backend services, or cloud-based platforms Familiarity with regulated, high-security, or mission-critical development contexts Confidence working in research ...

Full Stack Engineers for a client in the financial service space. The client requires Engineers who have experience with UI, APIs, C#, AWS, Python and Terraform. You must be an excellent communicator, due to the work required on the project, along with experience in either R Programming, Delivery Management … finance, with sufficient domain familiarity to be productive quickly without significant onboarding in core financial concepts. Strong proficiency in the following technologies: C#, Python, SQL, Terraform, AWS Proven ability to work directly with stakeholders and users to understand problems and deliver effective solutions. Strong analytical and problem-solving skills with ...

challenges regularly We're united by our mission, focused execution, and speed We deploy to production multiple times a day 🛠️ Tech Stack Backend: Python (FastAPI) + Typescript (express) Frontend: React + Typescript Infrastructure: AWS (serverless!), terraform Containerisation: Docker Database: PostgreSQL + DynamoDB CI/CD: GitHub actions + Blacksmith runners … speed, experimentation, and long-term code quality. Comfortable working with cloud-based platforms and collaborating closely with backend services and APIs. Bonus: Familiarity with Python or an interest in contributing beyond the frontend when needed. Benefits Competitive salary + equity Bi-annual offsite Regular team dinners + socials Choice ...

Automation Engineer - Wealth Management Technology - London/Hybrid (Key skills: QA Engineer, SDET, Test Automation, TypeScript, Python, C#, Playwright, Cypress, Selenium, API Testing, CI/CD, Agile, SQL, SalesForce, Git, DevOps, Financial Services, QA Engineer) Are you a QA Engineer with a strong software engineering mindset? Do you enjoy building … robust, scalable automation frameworks across web services and APIs. You'll work with modern tools such as Playwright/Cypress, alongside languages like TypeScript, Python and/or C#, to create high-quality, maintainable automated test suites that integrate seamlessly into CI/CD pipelines. You will collaborate closely with ...

application layer and integrations framework, helping evolve our systems from high-performing prototypes into secure, scalable, production-grade platforms. Our current stack includes: · Python/Flask backend · Jinja2 templating · Modular vanilla JavaScript (no front-end framework) · Tailwind CSS · Snowflake and S3 for data storage · PySCIP for optimisation workflows In addition … e.g. React, Vue, Next.js), even if not currently using one in production. Backend & API Experience – Experience designing and consuming RESTful APIs; comfortable working in Python-based backend environments. Integration Experience – Experience integrating with third-party APIs, handling authentication (OAuth, API keys, JWT), rate limits, retries, and error handling. Security Awareness ...

will be passionate about coding and excited to learn more. We are seeking someone with initiative who thrives is a collaborative envirovment. Stack includes: Python, dataclasses, Pandas, Polars, Pytest, Asyncio, Postgres, and AWS services such as ECS, Lambda and SQS - so experience with these technologies or alternatives would be helpful … long as you have a good understanding of Python and are smart and keen to learn then we can consider you. It’s a test driven environment; TDD/BDD, pair/mob programming and CI/CD with automated tests & linting. We would not expect much (or any) experience ...

140k 🚀🧠 💰 Salary: £70,000 - £140,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 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 ...

Title: Senior Python Software Engineer • Salary Range: £80,000 • Location/Working Model: UK (remote-first) A Senior Python Software Engineer is needed to join an international advanced analytics data company. Our client is a specialist technology business delivering sophisticated modelling and optimisation tools that help organisations make smarter commercial … stimulating, with real ownership, modern tooling (such as Pandas, SciPy, NumPy), and the chance to work on complex, meaningful challenges at scale. The Senior Python Software Engineer will design and build high-performance analytics modules that power advanced modelling and optimisation capabilities. Role Highlights • Develop scalable Python modules for analytics ...

employable as a data analyst. Microsoft excel - to expert level. Learn SQL - the programming language used for extracting data from more complex databases. Learn Python 3 - Python 3 is a simple to use programming language used by many analysts. Learn Tableau - Tableu is a tool which analysts use to build ...

Full Stack Developer (Python/React) Camden - Office Based 6-9 month FTC £60,000 to £70,000 Pro Rata + Benefits Exciting opportunity for a skilled Full Stack Developer to join a fast-growing London business, helping to design and build the backend systems, automation tools, and cloud infrastructure … company’s technology roadmap. The business is expanding its internal systems and automation capabilities and is looking for a developer with strong experience in Python, AWS cloud services, and modern API development. This role offers the chance to work on impactful projects including business automation, data processing systems, and modern ...

Full-Stack Engineer (React/Python/AI) Location: London (Hybrid) Salary: £100,000 + Equity About the Company: An early-stage, well-funded tech startup building AI-powered software to help businesses make smarter decisions and improve operational performance . The team is small, highly technical, and mission-driven … join a fast-moving, collaborative team. You’ll work across the stack — crafting sleek UIs in React , building scalable back-end systems in Python , and collaborating with AI specialists to deliver intelligent, high-impact features. Key Responsibilities: Build and maintain end-to-end product features used by enterprise customers. Develop ...

Senior Full Stack Engineer | London | £80,000 – £150,000 | Python | React Location: London (hybrid) Salary: £80,000 – £150,000 + meaningful equity Hiring for mid-senior-lead levels! Tech Stack: Backend: Python (Flask, FastAPI) Frontend: React, TypeScript Cloud: GCP or AWS Do you like building software that actually gets used … layers. No process theatre. Just smart people building important things properly. What you’ll be doing: Designing and scaling backend services and APIs in Python using Flask and FastAPI Building intuitive, high quality front end experiences in React and TypeScript Integrating AI models and third party systems into robust production ...

London - hybrid 1-2 days onsite every 2 weeks Inside IR35 - Umbrella only Skills required: Intermediate to advanced practical experience with: React and TypeScript Python AWS services i.e. Athena/Glue, DynamoDB, ECS, S3, Lambda, SQS, Step Function, etc Automated testing frameworks for Python and JavaScript Terraform for infrastructure ...

Software Engineer Tech Stack: C#, .NET, Python, AI Development, SQL, Azure London - Onsite Salary Range: £50,000 - £90,000 Harrington Starr has partnered with a boutique Investment Bank, with decades of experience and exceptional performance. They are currently seeking to hire a Polyglot Engineer possessing strong experience developing front office … modern technologies, building reliable business applications this could be the role for you. Responsibilities: Design and develop new front office application utilising C#, .NET, Python Working on internal systems to maintain quality and standards Utilising historical data for analytics, automation and strategic decision making Integration of modern technologies ...

Role : Senior Python Backend Engineer Location : London King's Cross - full time on site Salary : up to £200k base + equity We are partnered with a high-growth AI-driven platform that helps large enterprises automate complex, data-heavy workflows. The company is well-funded with. over $90M from … technical decisions, and engineering standards as the company continues to scale. What You’ll Be Doing Building and scaling backend services and APIs in Python Designing and optimising data pipelines and databases Working closely with ML engineers to deploy models into production Implementing async processing, caching, and event-driven systems ...

Environment: Theplatformcurrentlyoperatesinahybridenvironment: ~60%on-premiseinfrastructure ~40%MicrosoftAzure Thelong-termstrategyisfocusedonmodernisingtheplatform,improvingobservability,andevolvingcloudcapabilities,makingthisanexcellentopportunityforsomeonewhoenjoysbuildingandshapingsystems. TechStack: YoullbeworkingacrossamodernDevOpsandplatformstackincluding: Kubernetes Terraform Hybridcloudinfrastructure(on-premise+Azure) CI/CD&Automation GitHubActions Python AzureServices AzureKubernetesService(AKS) AzureVirtualMachines AzureVirtualNetworks AzureLoadBalancer AzureApplicationGateway AzureStorageAccounts AzureBlobStorage AzureKeyVault AzureMonitor AzureLogAnalytics AzureActiveDirectory AzureContainerRegistry AzureDNS AzureDevOpsintegrations Observability Logging,monitoring,andtracingacrossdistributedsystems Buildingmeaningfultelemetryandplatformvisibility Whatyou'llbedoing: Leadingtheevolutionofthecompanysplatformandinfrastructurestrategy DesigningandimprovinghybridAzure+on … 23daysperweekintheoffice IfyoureaSenior DevOpsEngineerwhoenjoyssolvingcomplexinfrastructureproblemswhileshapingplatformstrategy,thisisafantasticopportunitytomakearealimpact. Pleaseclick"APPLY"andreachouttoVytasJelinskasatReVybeIT,tofindoutmore. YoumusthavefullrightstoworkintheUK,andbehappytotravelintotheCentralLondonoffice2/3daysaweektobeconsideredforthisrole.Pleasekeepthisinmindwhenapplying! Senior DevOps Engineer-FinTech £100,000+Bonus CentralLondon Azure,Kubernetes,Terraform,On-Premise,Python,PowerShell,GitHubActions,PlatformEngineer ...

Senior Software Engineer Central London | Hybrid £100k–£140k + bonus + equity Python, Databricks, AWS/GCP, Kubernetes We’re hiring a Senior Software Engineer to join a well-funded data business operating in the government/intelligence space. This Senior Software Engineer role sits within the Core Engineering team … lead initiatives, mentor others, and help mature the platform as it scales. Key experience: Proven experience as a Senior Software Engineer Strong Python and SQL ETL/ELT pipeline design AWS or GCP Kubernetes Databricks Large-scale batch and/or streaming systems Blockchain/crypto exposure is a bonus. ...

/ELT pipelines and Data Marts using PySpark, EMR, and Glue. Legacy Modernisation: Architect the conversion of SAS Base/Macros into modular, testable Python code using SAS2PY and manual refactoring. Performance Tuning: Optimise Spark execution (partitioning, shuffling, caching) to ensure cost-efficient processing of massive financial datasets. Quality & Governance … Implement rigorous CI/CD, unit testing, and data reconciliation frameworks to ensure "penny-perfect" accuracy. Technical Stack Engine: PySpark (Expert), Python (Clean Code/SOLID principles). AWS: EMR, Glue, S3, Athena, IAM, Lambda. Data Modeling: SCD Type 2, Fact/Dimension tables, Data Vault/Star Schema. Legacy ...

Full Stack Developer (Python + Next.js) Full Time | On-site London, UK or Luxembourg Overview A fast-growing European technology company working at the intersection of AI and drug discovery is looking for a Full Stack Developer to join their engineering team. The organisation is building next-generation software platforms … full-stack platform that enables scientists to run and analyse complex biological simulations and experiments. Responsibilities include: Building and maintaining backend services in Python , including APIs and data-processing pipelines Developing frontend applications using Next.js and React Designing and implementing FastAPI endpoints for data-intensive application Writing robust tests using ...

Python Software Engineer/Developer (Data ML) Remote Uk to £75k Are you a data savvy Python Software Engineer? You could be progressing your career in as a hands-on Python Software Engineer role as part of a friendly and supportive international team at a growing and hugely successful European ...