601 to 625 of 793 Software Engineering Jobs in the City of London

Backend Software Engineer Term: 6 Months Pay: £888 per day Inside IR35 Location: Kings Cross London Hybrid Our client see a world in which advanced applications of Machine Learning and AI will allow us to develop novel therapies to existing diseases and to quickly respond to emerging or changing diseases with personalized drugs, driving better outcomes at reduced cost … skilled machine learning engineer to help us make this vision a reality. Competitive candidates will have a track record of writing and shipping quality, well-documented and well-tested software in the AI/ML industry. We are looking for candidates with experience in the field of Responsible AI, preferably for generative AI or language applications. In addition to … ML engineering and data science skills, ideal candidates will demonstrate a keen interest in ethical and safety aspects of using AI in drug discovery and the clinic. The Responsible AI team is built on the principles of ownership, accountability, continuous development, and collaboration. This fixed-term position is a unique opportunity to contribute to the development and evaluation of More ❯

I am working with an exciting AI startup who are turning complex video into searchable insights - they're looking for a Software Engineer to work on the backend. You’ll design scalable systems, build APIs, and deploy AI models—turning cutting-edge research into a production-ready platform. Remote : UK Salary : Up to £50k + 1% Equity What You … Azure) for performance and reliability Set up CI/CD pipelines and observability tools Collaborate with AI researchers to integrate models into production Take a product-first approach to engineering What You’ll Need 2-4 years experience with Python (FastAPI/Flask) Experience with distributed systems and cloud platforms Proficiency in database design (e.g. PostgreSQL) Familiarity with Docker More ❯

AI Software Developer (Python, JavaScript, ML) – London/Hybrid Day rate: £500 - £800 (inside IR35) Duration: 6 – 12 months Start: ASAP Hybrid: 3 days on site per week My client is looking for a Software Developer with AI, Python and JavaScript experience to join on a contract basis. As a Software Developer - AI, you will focus on … the development and delivery of Gen AI driven software solutions, working within a dynamic team to enhance our digital products. You will be responsible for writing clean, efficient, and maintainable code, primarily in Python and JavaScript, while contributing to the successful deployment of Gen AI technologies that directly impact the company’s customer experience (CX) vision. You will collaborate … closely with other software engineers, product teams, and AI specialists to develop LLM AI-powered applications, ensuring their scalability, security, observability and performance. This role is hands-on, with a primary focus on coding, testing, and deploying AI solutions in a fast-paced, agile environment. Responsibilities: Code Development and Testing Write, test, and maintain clean, efficient code in Python More ❯

AI Software Developer (Python, JavaScript, ML) – London/Hybrid Day rate: £500 - £800 (inside IR35) Duration: 6 – 12 months Start: ASAP Hybrid: 3 days on site per week My client is looking for a Software Developer with AI, Python and JavaScript experience to join on a contract basis. As a Software Developer - AI, you will focus on … the development and delivery of Gen AI driven software solutions, working within a dynamic team to enhance our digital products. You will be responsible for writing clean, efficient, and maintainable code, primarily in Python and JavaScript, while contributing to the successful deployment of Gen AI technologies that directly impact the company’s customer experience (CX) vision. You will collaborate … closely with other software engineers, product teams, and AI specialists to develop LLM AI-powered applications, ensuring their scalability, security, observability and performance. This role is hands-on, with a primary focus on coding, testing, and deploying AI solutions in a fast-paced, agile environment. Responsibilities: Code Development and Testing Write, test, and maintain clean, efficient code in Python More ❯

architecture, evolve the product, and define the future of private AI infrastructure. The role You’ll work directly with the founder on system architecture, model integration, and core product engineering, taking ownership from concept to production. What you’ll do Build and scale Nodko’s AI platform architecture across desktop and web environments Develop and optimize AI agent workflows … Implement efficient backend logic in Python Participate in strategic product and technical decisions as part of the founding team Requirements Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field Strong proficiency in Python, with clean coding practices and experience in building production-grade systems Ownership mindset — you take full responsibility for design, implementation, and More ❯

architecture, evolve the product, and define the future of private AI infrastructure. The role You’ll work directly with the founder on system architecture, model integration, and core product engineering, taking ownership from concept to production. What you’ll do Build and scale Nodko’s AI platform architecture across desktop and web environments Develop and optimize AI agent workflows … Implement efficient backend logic in Python Participate in strategic product and technical decisions as part of the founding team Requirements Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field Strong proficiency in Python, with clean coding practices and experience in building production-grade systems Ownership mindset — you take full responsibility for design, implementation, and More ❯

keep pipelines green. Operational excellence - create an on-call rota, build alerting dashboards, and personally cover your rotation. People management - mentor two juniors, run lightweight agile rituals, and set engineering standards. Stakeholder liaison - convert consulting goals into technical milestones, demo progress to execs and clients, and flag risks early. Future tribe lead - help shape a squads-and-tribes model … incident processes. Clear written and verbal communicator able to brief execs, consultants and non-technical stakeholders. What we offer Competitive salary. Influence from day one: shape architecture, DevEx and engineering culture. Fast growth path - opportunity to build and then lead a larger tribe. Hardware, training budget and travel for occasional team off-sites. Supportive, low-bureaucracy environment where decisions … translate quickly into action. Interview process (23 weeks total) Intro call Culture & mutual fit (basic engineering process questions) 30 min Technical deep-dive System design, code walkthrough 90 min Executive panel Roadmap discussion & Q&A 45 min Offer References & negotiation Ready to scale automated UX assessment for the worlds leading brands More ❯

Apps In the world of e-commerce, your brand identity is your most valuable asset. At Venn Apps, we build powerful e-commerce technology for Shopify merchants through our Software-as-a-Service platform. Our products and apps bring brands to life and help businesses deliver world-class shopping experiences across web and mobile. Our team has over three … portfolio of clients including ANINE BING, Motel Rocks, AYBL, Toteme, Astrid & Miyu, and other international retailers across the US, EU, and Australia. The role TWe’re looking for a Software Engineer to join our growing team and help take our SaaS platform and client solutions to the next level. You’ll be responsible for building and maintaining the web … to improve code quality, developer workflows, and overall architecture Help shape new product features from concept to production Who We’re Looking For 2–4 years’ experience as a software engineer (or equivalent commercial experience) Strong knowledge of React, TypeScript, and Next.js Experience with GCP or another cloud provider (e.g. AWS, Firebase, or Azure) Understanding of API design and More ❯

tackling cross-border payments, treasury systems, and crypto liquidity. It’s all greenfield, all high-impact. No legacy systems or old fluff to get through. Just clean architecture, smart engineering, and a product already making serious waves. You’ll join a small, senior team building real-time financial infrastructure from the ground up, card payments, transaction booking, FX flows More ❯

next-gen labour automation unit, providing highly efficient services across various use cases, starting with industrial applications. We are looking for a passionate and skilled Sr Full-Stack Robotics Software Engineer to join our innovative team in London. Our Mission At Humanoid, we strive to create the world’s leading, commercially scalable, safe, and advanced humanoid robots that seamlessly … KPIs using modern front-end frameworks like React. Develop robust backend services to support the platform, including APIs for communication, data management, and integrations with robotic systems. Build lightweight software services that run on the robots, enabling remote control, data collection, diagnostics, and state management. Integrate Human Interface Devices (HID) such as game controllers or joysticks to provide intuitive … low-latency remote control over robot movements and actions. Streamline and automate workflows, including software deployment, performance monitoring, and diagnostics, to enhance reliability and efficiency. Implement testing pipelines to validate the functionality of the UI, backend, robot-side services, and HID-driven control flows. Ensure smooth communication and functionality between the platform, backend services, robot-side services, hardware systems More ❯

next-gen labour automation unit, providing highly efficient services across various use cases, starting with industrial applications. We are looking for a passionate and skilled Sr Full-Stack Robotics Software Engineer to join our innovative team in London. Our Mission At Humanoid, we strive to create the world’s leading, commercially scalable, safe, and advanced humanoid robots that seamlessly … KPIs using modern front-end frameworks like React. Develop robust backend services to support the platform, including APIs for communication, data management, and integrations with robotic systems. Build lightweight software services that run on the robots, enabling remote control, data collection, diagnostics, and state management. Integrate Human Interface Devices (HID) such as game controllers or joysticks to provide intuitive … low-latency remote control over robot movements and actions. Streamline and automate workflows, including software deployment, performance monitoring, and diagnostics, to enhance reliability and efficiency. Implement testing pipelines to validate the functionality of the UI, backend, robot-side services, and HID-driven control flows. Ensure smooth communication and functionality between the platform, backend services, robot-side services, hardware systems More ❯

Senior Software Engineer (Node.js/TypeScript) I’m partnering with a HealthTech scaleup on a mission to improve health outcomes globally. They’re building a platform that’s already making a huge impact and are now looking for a Senior Software Engineer to help shape the next stage of their technology. You’ll work across design, product and … engineering to build scalable backend systems that are high quality, secure and reliable. This suits someone who enjoys ownership, collaboration and bringing structure to fast-paced environments while keeping a product mindset. What you’ll be doing • Designing, building and maintaining backend systems and APIs • Collaborating across teams to deliver high-impact features • Continuously improving quality, security and reliability … Using AI tools to speed up development and delivery • Always challenging if the team is building the right things What they’re looking for • 4+ years of backend engineering experience • Strong knowledge of Node.js, TypeScript and REST APIs • Experience with SQL and NoSQL databases • Interest or experience with healthcare data formats • Enjoys working in a fast-changing environment and More ❯

Founding Software Engineer (React and Python) About the Opportunity You will be joining an elite founding engineering team that includes the world’s number one authority in Multi Agent Reinforcement Learning, seasoned Meta Product leaders, and one of the only people in the UK who has trained a trillion token language model from scratch. This role is based … offers a top tier salary plus equity package to reflect the strategic and high impact nature of the work. Why This Role Matters You are part of the initial engineering core, playing a pivotal role in shaping and scaling the technology platform from the ground up. You will work alongside leading researchers and product strategists at the intersection of … including data pipelines, model versioning, monitoring, automated deployment and continuous integration • Drive end to end ownership from ideation to deployment, performance and scaling • Mentor future hires and define scalable engineering culture, processes and tooling Candidate Profile • Proven track record (five plus years) in engineering roles involving scalable, machine learning intensive systems whether via start ups or technology critical More ❯

Founding Software Engineer (React and Python) About the Opportunity You will be joining an elite founding engineering team that includes the world’s number one authority in Multi Agent Reinforcement Learning, seasoned Meta Product leaders, and one of the only people in the UK who has trained a trillion token language model from scratch. This role is based … offers a top tier salary plus equity package to reflect the strategic and high impact nature of the work. Why This Role Matters You are part of the initial engineering core, playing a pivotal role in shaping and scaling the technology platform from the ground up. You will work alongside leading researchers and product strategists at the intersection of … including data pipelines, model versioning, monitoring, automated deployment and continuous integration • Drive end to end ownership from ideation to deployment, performance and scaling • Mentor future hires and define scalable engineering culture, processes and tooling Candidate Profile • Proven track record (five plus years) in engineering roles involving scalable, machine learning intensive systems whether via start ups or technology critical More ❯

Senior Software Engineer (React, Node.js, AWS) Salary: £90,000 - £110,000. Location: Hybrid in London. Senior Software Engineer (React, Node.js, AWS) - would you like the opportunity to work for a market leading organisation, currently looking to revolutionise the data space? You will be joining a technology team who have a passion for innovation, collaboration as well as embracing … new ideas, technologies and approaches. As a Senior Software Engineer, you will be working closely with Product and design, taking full responsibility and ownership from conception to post-deployment. The company has grown significantly in the last few years and are looking for someone who can join in the process of growing their brand. Essential skills: · Fullstack JavaScript and … a web application from scratch. · Ideally looking for Backend focused Engineers who are comfortable across the stack so must be happy working this way. If you're a Senior Software Engineer with strong experience working in JS/TS, please apply. More ❯

Role Responsibilities; Investigate, troubleshoot and diagnose incidents Provide first-third line investigation and diagnosis of incidents and Service Requests. Be the Incident coordinator for operational incidents on the core engineering production platform. This includes all technical internal communications, ensuring processes are followed and all post-incident follow up and analysis. Escalate incidents or services requests that require system, config … or code changes to appropriate on call Engineer Manage engineering service requests, prioritizing requests according to urgency/impact and ensuring requests are serviced in timely manner Work with engineers to establish or update runbooks and procedures needed for handling incidents and Service Requests. Develop and maintain knowledge base and respond to customer’s technical questions. Actively monitor integration … management processes Experience working as an Application Support/DevOps or SRE Role (preferably with in Trading & Risk Management systems ) Experience communicating to customers as well as to sr. software engineers Experience with Python, PostgresSQL and Unix Experience with writing intermediate to advanced SQL queries for data extraction and troubleshooting purposes. Experience with using and troubleshooting programming interfaces especially More ❯

Role Responsibilities; Investigate, troubleshoot and diagnose incidents Provide first-third line investigation and diagnosis of incidents and Service Requests. Be the Incident coordinator for operational incidents on the core engineering production platform. This includes all technical internal communications, ensuring processes are followed and all post-incident follow up and analysis. Escalate incidents or services requests that require system, config … or code changes to appropriate on call Engineer Manage engineering service requests, prioritizing requests according to urgency/impact and ensuring requests are serviced in timely manner Work with engineers to establish or update runbooks and procedures needed for handling incidents and Service Requests. Develop and maintain knowledge base and respond to customer’s technical questions. Actively monitor integration … management processes Experience working as an Application Support/DevOps or SRE Role (preferably with in Trading & Risk Management systems ) Experience communicating to customers as well as to sr. software engineers Experience with Python, PostgresSQL and Unix Experience with writing intermediate to advanced SQL queries for data extraction and troubleshooting purposes. Experience with using and troubleshooting programming interfaces especially More ❯

monotonous, we envision a future where human well-being is safeguarded while closing the gaps in critical global labour needs. We are now looking for a Lead Full Stack Software Engineer with a strong frontend focus to help design and build a modern, web-based platform for managing and monitoring our robots and systems. While we operate in the … KPIs using modern front-end frameworks like React. Develop robust backend services to support the platform, including APIs for communication, data management, and integrations with robotic systems. Build lightweight software services that run on the robots, enabling remote control, data collection, diagnostics, and state management. Integrate Human Interface Devices (HID) such as game controllers or joysticks to provide intuitive … low-latency remote control over robot movements and actions. Streamline and automate workflows, including software deployment, performance monitoring, and diagnostics, to enhance reliability and efficiency. Implement testing pipelines to validate the functionality of the UI, backend, robot-side services, and HID-driven control flows. Ensure smooth communication and functionality between the platform, backend services, robot-side services, hardware systems More ❯

Senior Software Engineer - Full Stack - TypeScript, Node React, AWS, Serverless, DynamoDB - Energy & Utilities Cleantech SaaS Location: Hybrid/Remote - London (flexibility available) Salary: Up to £80,000 About the Company This role is with, in our opinion, one of the most exciting SaaS firms in the energy and utilities space, delivering cleantech solutions to major businesses worldwide. Their mission … Experience: Strong experience with TypeScript in both frontend and backend development. Proficiency with Node.js, React and building serverless applications. Experience with AWS services, particularly Lambda and DynamoDB. Familiarity with software development best practice, including testing, CI/CD and version control. Passion for writing clean, efficient code and delivering high-quality software. Interest in energy, utilities or cleantech sectors More ❯

Senior Software Engineer - Full Stack - TypeScript, Node React, AWS, Serverless, DynamoDB - Energy & Utilities Cleantech SaaS Location: Hybrid/Remote - London (flexibility available) Salary: Up to £80,000 About the Company This role is with, in our opinion, one of the most exciting SaaS firms in the energy and utilities space, delivering cleantech solutions to major businesses worldwide. Their mission … Experience: Strong experience with TypeScript in both frontend and backend development. Proficiency with Node.js, React and building serverless applications. Experience with AWS services, particularly Lambda and DynamoDB. Familiarity with software development best practice, including testing, CI/CD and version control. Passion for writing clean, efficient code and delivering high-quality software. Interest in energy, utilities or cleantech sectors More ❯

I'm lookout for a Senior Software Developer who enjoys wrangling geospatial data, shaping technical direction, and mentoring junior devs without making them cry (ideally). You’ll be helping design, build, and scale systems that literally protect people and businesses from chaos. You won’t need to wear a cape—but if you have one, that’s fine … and data teams without resorting to interpretive dance. Refactor legacy code without crying. Or while crying—we don’t judge. Monitor systems like a hawk with a dashboard. Link engineering strategy to business goals (while avoiding buzzword bingo). Represent engineering in meetings where someone inevitably says “let’s just make it AI.” Champion sensible things like accessibility … don’t break out in hives at the sight of legacy code. You understand the importance of CI, testing, and not YOLOing into production. You’ve worked the full software lifecycle and lived to tell the tale. You can read and process geospatial data without rage-quitting. You’ve used AWS and serverless tools, and ideally haven’t cursed More ❯

Software Engineer - Financial Services A leading UK bank is seeking Full Stack Engineers to join its new tech hub and help redefine engineering excellence. In addition, the bank is focused on bridging the gap between product management and hands-on engineering, while fostering a culture of continuous improvement. What You’ll Do: Design, architect, and develop industry … leading software solutions using a variety of programming languages, frameworks, and tools. Deliver high-quality, complex software that enhances and elevates the engineering standards across the bank. Contribute to every stage of the software development lifecycle, from initial development through rigorous testing and successful deployment to production. Work closely with product teams, business stakeholders, and other … experts to create strategic solutions that ensure seamless integration and exceptional outcomes. Key Priorities: Proficiency in Java and AWS Experience with Salesforce development and React A strong focus on engineering efficiency, including knowledge of DORA metrics, DevOps methodologies, and practices like TDD or BDD An ambitious growth mindset, eager to innovate and drive change Reports directly to the Engineering More ❯

Software Engineer - Financial Services A leading UK bank is seeking Full Stack Engineers to join its new tech hub and help redefine engineering excellence. In addition, the bank is focused on bridging the gap between product management and hands-on engineering, while fostering a culture of continuous improvement. What You’ll Do: Design, architect, and develop industry … leading software solutions using a variety of programming languages, frameworks, and tools. Deliver high-quality, complex software that enhances and elevates the engineering standards across the bank. Contribute to every stage of the software development lifecycle, from initial development through rigorous testing and successful deployment to production. Work closely with product teams, business stakeholders, and other … experts to create strategic solutions that ensure seamless integration and exceptional outcomes. Key Priorities: Proficiency in Java and AWS Experience with Salesforce development and React A strong focus on engineering efficiency, including knowledge of DORA metrics, DevOps methodologies, and practices like TDD or BDD An ambitious growth mindset, eager to innovate and drive change Reports directly to the Engineering More ❯

Multiple Software Engineers Palantir, Strong ETL, AWS & Python -Fully Remote UK Based Offices based in London - MUST BE SECURITY CLEARED - DV/SC Areti Group has exclusively partnered with a rapidly growing startup who are seeking 8 Software Engineers to start ASAP. These roles are fully remote. This business has grown by 75% this year and is now … looking for another 30 hires between now and February. My client is seeking highly skilled and motivated Software Engineers with expertise in ETL, AWS, and Python. The ideal candidate will have a proven track record in designing and creating ETL pipelines to support major customer initiatives at the early stages of projects. This individual will play a critical role … in our data engineering team, contributing to the development and maintenance of robust and scalable data solutions. Responsibilities include the following: Responsibilities: Strong Palantir experience is desirable ETL Pipeline Design and Implementation: Design, develop, and implement efficient and scalable ETL pipelines to support the extraction, transformation, and loading of data from diverse sources. Ensure the pipelines are optimized for More ❯

Python Software Engineer – High-Frequency Trading We're working with a high-frequency trading (HFT) firm that is looking to expand its technology team with a Python Software Engineer. This is an opportunity to join a trading firm operating at the cutting edge of global markets, where technology and speed are paramount. They build and run highly scalable … ultra-low latency trading systems that compete across major global exchanges. You’ll work on some of the most complex and rewarding engineering challenges in the financial technology space. The Role As a Python Software Engineer, you’ll collaborate with traders, quantitative researchers, and other developers to design, develop, and optimise trading infrastructure. You’ll be directly contributing … time systems, or algorithmic trading. Why Apply? Opportunity to work on high-impact systems used in live trading. Collaborate with some of the brightest minds in quantitative finance and software engineering. Competitive compensation package with a base salary, plus bonus. We are reviewing applications on a rolling basis. If this role sounds like a fit, apply now to learn More ❯