1 to 25 of 40 Asynchronous Programming Jobs in London

Full-Stack Developer – React, Python, Oracle Database, and AI/GenAI

Location
Greater London, England, United Kingdom
practices including lazy loading, code splitting, caching, and asset optimisation. Back-End & Database Development Experience designing and developing RESTful APIs and microservices. Familiarity with asynchronous programming in Python, including asyncio. Experience with third-party API integrations and data-processing workflows. Strong working knowledge of Oracle Database including schema ...

AI Transformation Developer

Location
Greater London, England, United Kingdom
data storage patterns for AI applications Familiarity with cloud platforms such as AWS and Azure, and containerization technologies including Docker and Kubernetes Understanding of asynchronous programming, performance optimization, and scalable backend architectures Experience with unit testing, debugging, version control, and software engineering best practices Familiarity with data processing ...

Node Developer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent
cycles, contributing to sprint planning, code reviews, and continuous delivery. Key Skills/Experience: Proven experience in Node.js development Strong knowledge of JavaScript (ES6+), asynchronous programming, and event-driven architecture. Experience with building and maintaining RESTful APIs. Solid understanding of SQL and NoSQL databases (e.g., MongoDB, PostgreSQL, MySQL ...

Microsoft Full Stack Senior Developer (Manager)

Location
Greater London, England, United Kingdom
software engineering experience, including recent hands‐on delivery using the Microsoft technology stack. Expert‐level C#, .NET and ASP.NET Core skills, including API design, asynchronous programming, dependency injection, testing and performance optimisation. Strong commercial experience with React and/or Angular and TypeScript, including component design, state management ...

Apps Dev Senior Engineer

Location
Greater London, England, United Kingdom
ownership of delivery—from requirement analysis and technical design to deployment, production monitoring, and support. Required Skills & Qualifications Technical Competencies Core Programming: Advanced proficiency in at least one primary backend language: Java (Modern Java, Spring Boot, concurrency, low-latency tuning, GC optimization), OR Python (Modern Python, asynchronous programming, NumPy/Pandas, FastAPI), OR .NET/C# (Modern .NET Core, multi-threading, asynchronous I/O, memory profiling). Distributed Systems & Messaging: Strong experience with enterprise messaging and streaming frameworks (e.g., Apache Kafka, RabbitMQ, Solace, ZeroMQ, or gRPC). Data Storage & Analytics: Proficiency in relational databases (PostgreSQL ...

Senior Software Developer

Hiring Organisation
Spectrum IT Recruitment Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
similar Identify and resolve performance bottlenecks across applications and databases Develop reliable, maintainable and highly scalable software Work with multi-threading, concurrency and asynchronous programming Investigate complex technical challenges and deliver long-term solutions Contribute to code reviews, automated testing, CI and development tooling Mentor other developers … Engineering or another relevant technical discipline Highly Desirable Experience in any of the following would be particularly valuable: Multi-threaded and concurrent application development Asynchronous and parallel programming Low-latency or high-throughput systems TCP/IP, UDP or network programming Distributed systems and service-oriented architectures ...

Senior Machine Learning Engineer

Location
City Of London, England, United Kingdom
track record of writing clean, maintainable and high-quality production code. Experience supporting business-critical systems in live production environments. Strong understanding of asynchronous programming, Docker, containerised deployments and modern service architectures. Experience designing distributed systems, asynchronous microservices and event-driven architectures. Confidence leading system design discussions … agentic software development can improve engineering delivery without compromising code quality. Strong communication skills and the ability to collaborate effectively in remote or asynchronous environments. An ownership mindset, with the ability to work independently and contribute effectively to shared codebases. Core Values Love what you do: We show ...

Senior Software Engineer

Location
Greater London, England, United Kingdom
architecture. Strong knowledge of data structures, algorithms, and object-oriented programming. Hands-on experience with databases such as PostgreSQL, MySQL, or MongoDB. Familiarity with asynchronous programming and performance optimization techniques. Experience with cloud platforms (AWS, GCP, or Azure) and containerization tools like Docker. Knowledge of CI/ ...

Full Stack Developer

Location
City of Westminster, England, United Kingdom
teams to deliver high-quality software solutions. Mentor junior engineers and contribute to technical knowledge sharing. Technical Requirements Node.js : Deep hands-on experience with asynchronous programming and frameworks (Fastify, Express, Koa, or Hapi). Frontend : Strong proficiency in Next.js and Angular . Microservices : Proven experience designing and deploying ...

Senior Forward Deployed ML Engineer, Agents

Location
Greater London, England, United Kingdom
similar orchestration frameworks Voice AI platform experience built real-time conversational systems with production STT/TTS integration Proficiency in Python (production-grade, async programming, type hints) and JavaScript/TypeScript (full-stack development) RAG implementation experience built retrieval-augmented generation systems with vector databases MLOps & deployment hands ...

Data Scientist

Location
City Of London, England, United Kingdom
within a cross-functional team. Nice to have Prior experience in a business-critical/high-uptime production environment Experience with Databricks Understanding of asynchronous programming, containerised deployments (Docker), and modern service architectures Hands-on experience with Infrastructure as Code, particularly Terraform Experience designing and building distributed, asynchronous ...

Senior Backend Engineer

Location
Greater London, England, United Kingdom
ownership over services or distributed systems. Expertise in Python, FastAPI, Flask, or Node.js and modern backend development patterns. Strong understanding of microservices, concurrency, async programming, and event‐driven architectures. Proficiency with SQL and NoSQL databases (PostgreSQL, DynamoDB, Redis, MongoDB). Hands‐on experience with Docker, Kubernetes, and cloud platforms ...

Python AI Engineer

Hiring Organisation
Square One Resources
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £700/day
workflows using structured outputs, tool calling, schema validation and controlled fallbacks. Implement vector, lexical and hybrid retrieval, metadata filtering, reranking and evidence selection. Build asynchronous services with appropriate timeout, retry, cancellation and exception handling. Develop automated unit, integration, regression and failure-path tests. Implement structured logging, tracing and operational … reviews, engineering standards and production support. Required Skills/Experience: Strong commercial experience developing production-grade Python applications and services. Advanced Python skills, including asynchronous programming, type annotations, modular design and performance optimisation. Hands-on experience with Pydantic, LangGraph, MS Agent Framework/Semantic Kernel or similar ...

iOS Developer

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £420 per day + Inside IR35
reusable component-based development. API & Data Integration Experience consuming RESTful APIs. JSON parsing and data mapping. Authentication mechanisms including OAuth and JWT. Knowledge of asynchronous programming techniques. Data Storage Experience with: Core Data SQLite UserDefaults Cloud-based data services Testing Unit testing using XCTest. UI testing and automation. ...

Senior Backend Engineer (Python)

Location
Greater London, England, United Kingdom
4+ years of experience in Python engineering, ideally building AI platforms, ML infrastructure, or applied AI products. Deep expertise in Python, asynchronous programming, system design, and backend engineering fundamentals. Hands-on experience building production systems involving: LLM orchestration or agent frameworks (Pydantic, LangChain, custom orchestration). Data pipelines ...

.NET Engineer

Location
Greater London, England, United Kingdom
versions. Excellent understanding of Entity Framework Core, LINQ, and collections. Excellent understanding of ASP.NET, associated concepts, error handling, and request lifecycle. Excellent understanding of asynchronous programming, generics, data types, and memory management in C#. Excellent understanding of object-oriented programming and software engineering fundamentals. Very good understanding ...

Threat Modeling – Cyber Security

Location
Greater London, England, United Kingdom
CICD, Pipelines, SDLC) Scripting languages, Infrastructure as Code (Terraform, CloudFormation) Understanding of docker/K8S/serverless/helm – must. Strong proficiency in Programming Languages, with a preference for Python (asynchronous programming), and FastAPI Unit Testing: Developing and executing unit tests using frameworks like Pytest to ensure ...

Lead Web3 Engineer - Digital Assets Platform

Location
Greater London, England, United Kingdom
following established security and quality standards Build and maintain APIs and microservices that expose blockchain functionality to upstream platform consumers and business applications Implement asynchronous and event‐driven processing to manage transaction lifecycle, on‐chain state changes, and blockchain data synchronization Participate actively in code reviews, contributing constructive feedback … with Backend web development with Java spring Solid experience in web3 application development is a plus Solid experience and expertise developing web applications using asynchronous programming and communication Experience and expertise developing web applications adhering to best practices and patterns for reliability, scalability, and performance Familiarity with web3 ...

Full-stack AI Engineer

Location
Greater London, England, United Kingdom
skills - you can architect complex frontend applications with good state management, performance, and testing Strong Python backend experience - FastAPI, Django, or Flask with async programming, clean architecture, and production-grade code System design skills - you can design scalable, maintainable systems and articulate trade-offs clearly API design expertise - REST ...

Junior C# Developer

Hiring Organisation
Spectrum IT Recruitment
Location
London, United Kingdom
Employment Type
Permanent
Salary
£70000 - £90000/annum
degree in a STEM subject Some commercial experience developing software with C# Good understanding of .NET/.NET Core Solid knowledge of object-oriented programming Understanding of SQL and relational databases Strong problem-solving and analytical skills A genuine enthusiasm for software engineering and learning new technologies Someone … need to tick every box, but exposure to any of the following would be beneficial: ASP.NET Core/Web APIs SQL Server Multithreading or asynchronous programming Git Automated testing and CI/CD Distributed systems Performance optimisation or low-latency applications AWS or Azure An interest in financial ...

iOS Developer

Location
Greater London, England, United Kingdom
Desirable technical skills Experience with Objective-C and maintaining or modernising existing Objective-C codebases. Experience with SwiftUI and/or UIKit. Experience with asynchronous programming and concurrency in Swift. Knowledge of iOS application architecture and design patterns. Experience with CI/CD pipelines and automated build ...

Android Developer

Location
Greater London, England, United Kingdom
Java codebases. Experience with Jetpack Compose and/or traditional Android Views. Experience with Android Jetpack libraries and modern Android architecture components. Experience with asynchronous programming and Kotlin Coroutines. Knowledge of Android application architecture and design patterns. Experience with CI/CD pipelines and automated build and deployment ...

Lead Forward Deployed AI Engineer (SVP)

Location
Greater London, England, United Kingdom
background in backend and distributed systems, alongside proven experience building and deploying production‐grade LLM and agentic AI applications. Expert‐level Python skills, including asynchronous programming with asyncio, state machines and the design of complex application workflows. Strong experience with distributed microservices, containerisation and orchestration technologies, including Docker ...

Senior Software Developer

Hiring Organisation
Spectrum IT Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£120000 - £150000/annum
Essential Skills & Experience 5+ years' professional software development experience Strong commercial experience developing applications using C# and modern .NET Excellent understanding of object-oriented programming, software design principles and architecture Proven experience designing and developing production-grade, scalable software systems Strong experience working with SQL Server, Oracle or another … Computer Science, Mathematics, Physics, Engineering or another relevant scientific/technical discipline Desirable Technical Experience Experience developing multi-threaded and concurrent applications Understanding of asynchronous programming and parallel processing Experience with TCP/IP, UDP or network programming Experience building low-latency or high-throughput applications Experience ...

Senior Python Engineer: AI Agents & Forecasting

Location
Greater London, England, United Kingdom
LangGraph (agent memory, tool calling, state management) Dagster in production (assets, sensors, partitions) or equivalent pipeline orchestration Strong backend fundamentals including API design, async programming, and database modelling You've built systems that had to work reliably at scale, not just pass a demo Experience 5+ years ...