51 to 75 of 134 Software Engineering Jobs in the City of London

roadmaps aligned to long-term business strategy What were looking for in a Solutions Architect Proven background in solution architecture across enterprise environments Strong software engineering foundation in Java and/or .NET Experience designing microservices and API-led architectures Knowledge of cloud platforms such as AWS, Azure ...

with trading, infrastructure, and product teams to deliver high-quality integrations. Monitor, debug, and continuously improve production systems. Mentor junior engineers and help shape engineering best practices. Participate in on-call rotations and occasional travel as needed. Ideal Candidate Profile 3-5+ years of professional software engineering ...

architecture, emphasizing scalability, stability, and performance. Coordinate with Quality Assurance teams to ensure rigorous testing and validation. Ensure timely delivery of high-quality software solutions aligned with regulatory and business requirements. Requirements: Bachelor's degree in Computer Science, Software Engineering, or related field. Proven experience ...

Paragon Alpha are working with one of the worlds most successful multi-strategy hedge funds, who have a huge emphasis on culture and work life balance, as well as high performance. They have a central ...

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 … significant, end-to-end improvements across the entire infrastructure lifecycle. Your responsibilities will include: • Improving Deployment Speed: Taking the lead on optimising and accelerating software delivery processes. •Pipeline Implementation: Designing and implementing robust deployment pipelines and comprehensive test suites. •Performance & Monitoring: Designing and building a state ...

Senior Software Engineer The Opportunity On behalf of a global powerhouse in FinTech Infrastructure , we are seeking a Senior Software Engineer . Our client operates one of the largest financial networks, serving as the digital backbone for thousands of global financial institutions. This is a senior-tier appointment … resilient, high-concurrency systems and wants to lead the digitalization of global financial markets. The Technical Stack You will be working within a modern, engineering-first culture. The core stack includes: The Engine: Expert-level C# and .NET Core mastery. Architecture: Deep understanding of SOA (Service Oriented Architecture ...

Full Stack Software Engineer London (On-site) This is a hands-on software engineering role focused on building systems that directly run and optimise modern factories. The software is deployed into live production environments and is responsible for automation, real-time data, and operational decision-making. … world rather than purely digital products. What you’ll do: Build and own full-stack systems used in live factory operations Ship and iterate software directly in production environments Work closely with operators and leadership to remove operational bottlenecks Take features from concept through deployment with full ownership Nice ...

ecosystem and have a need for several Mobile Engineers to help lead the way. This is a rare chance to join a growing central engineering function building a globally scalable mobile platform across multiple countries. As a Senior Mobile Engineer, you'll take ownership of complex technical areas, deliver … high-impact features, and establish best practices across a Kotlin Multiplatform (KMP) ecosystem. You'll work cross-functionally with Engineering Leads, Product, Design, QA, and Backend teams to build outstanding mobile experiences for millions of users across Android and iOS. Experience Experienced software engineering experience, with strong ...

ONNX, TensorRT, TensorFlow Serving, TorchServe). Experience with ML lifecycle tools (MLflow, Kubeflow, Azure ML Pipelines). Knowledge of distributed data processing (PySpark) and software engineering principles (Git). A collaborative mindset and excellent problem-solving abilities. Experience in data cleansing, exploratory data analysis, and visualisation. A continuous ...

reduce financing costs and optimize return metrics. Who We're Seeking: We're on the lookout for a seasoned Associate to Mid-level Software Engineer with hands-on Python experience. Familiarity with AWS Serverless and related technologies would be advantageous. Strengths in Pandas, Polars, Pytest, Postgres, and CI/ ...

Python Software Engineer – Sports Trading Technology Permanent | Full-time | London (Hybrid) Overview A technology-driven trading firm operating within global sports betting markets is looking to hire a Python Software Engineer. The business combines quantitative research, proprietary systems, and deep sports market expertise to identify inefficiencies across major … collecting, processing, and storing sports data Identify and resolve issues within data feeds such as missing or duplicated information Improve and maintain existing internal software projects and infrastructure Analyse betting and performance data and help translate findings to traders and non-technical stakeholders Work closely with internal users ...

Software Engineer London/Hybrid | Perm Role £60,000 - £80,000 Harrington Starr has partnered with a fast-growing fintech that’s transforming how businesses manage foreign exchange and treasury operations. Their technology enables clients to access institutional-grade execution, automate manual workflows, and gain greater transparency across their … product offering and deliver cutting-edge solutions that help clients manage risk more effectively. The Role This is an excellent opportunity for an experienced Software Engineer — ideally with a background in financial technology or FX — to join a high-performing engineering team within a scaling fintech. ...

will directly enhance the Ultralytics HUB platform and empower our global community of developers and researchers. 🛠️ Skills and Experience 5+ years of experience in software engineering, with a strong focus on AI and Machine Learning (ML). Expert-level proficiency in Python and deep learning frameworks, particularly PyTorch. … experience with the full RAG pipeline, including vector embeddings , rerankers , and data indexing in databases like MongoDB. Practical knowledge of LLM fine-tuning, prompt engineering, and performance optimization. Familiarity with MLOps principles and tools, including CI/CD with GitHub Actions . A strong interest in computer vision ...

Software Engineer Onsite role in Soho £80-120k depending on experience We’re on a mission to reinvent how AI understands people — not through CVs or data points, but through story, reasoning, and curiosity. We’re building systems that listen, interpret, and understand why people say what they ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing … UK. This role offers hybrid working, with an office location based in the City of London. This role will suit a Senior Software Engineer, with expert C#, .NET experience having a direct impact from the get-go. ...

Senior Developer | Senior Software Engineer C#, .Net, Typescript, JavaScript Hybrid, 1-2 days near Liverpool Street Salary, £85,000 to £95,000 + benefits If you enjoy solving complex engineering problems, learning from highly capable peers, and working on a product where your contribution genuinely matters, please read … early investment phase with strong growth ambitions, offering real scope for progression and the chance to help shape both the product and engineering direction. You'll be part of a bright, collaborative team of talented software engineers and academically strong problem-solvers who value clean design and thoughtful ...

lodging, cars, activities, flights and packages. In this role, you will provide technical leadership for native search and discovery experiences, setting architectural direction, influencing engineering standards, and shaping the evolution of AI-enabled capabilities across the mobile platform. In this role, you will: Lead the design, development, and maintenance … requirements. Drive cross-functional collaboration to define, develop, and ship impactful features, ensuring alignment with organisational goals and technical strategy. Champion best practices in software engineering, testability, and maintainability through code reviews and mentoring. Safely integrate and operate AI/ML‐enabled solutions to enhance user experience ...

will be joining at a time where you a genuinely needed and can have an immediate impact! Their ideal candidate will have a software engineering background who is now an AI Engineer working with LLMs You will: Design and build LLM-powered applications Develop Python-based microservices Build … integration into applications, deployment and product ionisation Proficiency with python Having built microservices If you are interested in this or other AI Engineering positions, please contact Gilad Sabari @ gilad.sabari@xcede.com ...

product practice delivering impactful digital services for high-profile clients. The organisation specialises in combining data-informed decision making, human-centred design and modern software engineering to solve complex problems and create meaningful outcomes for users and organisations alike. This role sits at the heart of multidisciplinary delivery ...

This role is greenfield and will allow you to shape the build out of this business function. What else is in it for you? • Software Engineers are treated as the company's #1 asset • Low attrition rate; people working there love what they do on a daily basis! • Very ...

key. There is strong end-to-end ownership and clear visibility across the full trading stack. They are looking for someone with a solid software engineering background and several years of experience (typically around 3–7). Experience with trading systems or DeFi is beneficial but not required. … Familiarity with ecosystems such as Solana, Sui, or Cosmos Experience diagnosing performance, latency, or throughput issues Interest in product design and user experience alongside engineering ...

Mid-Level Engineer - Technology & Innovation London, UK Hybrid 3 days a week in office. We're hiring a Mid-Level Engineer to join a growing Technology & Innovation team within a Financial Advisors firm, one of ...

Backend Software Engineer London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects … What will I be doing? Lead the technical vision and architectural direction across complex backend systems, ensuring scalability, reliability, and performance. Partner closely with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software ...

recommendations across travel, health, dining and experiences. Already seeing strong early traction with a high value user base, they are now expanding their founding engineering team as they scale both product and members. This is a true 0 to 1 opportunity to work directly with founders and shape both … APIs, background jobs and data processing Collaborate closely with product and design to ship high quality user experiences What They’re Looking For Strong software engineering fundamentals across system design, architecture and data structures Solid hands on experience with Python and backend development Experience working with LLMs ...

Software Engineer - Backend London (Occasional travel) Salary: Up to £85k + Benefits An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects … What will I be doing? Lead the technical vision and architectural direction across complex backend systems, ensuring scalability, reliability, and performance. Partner closely with engineering leadership to define best practices, coding standards, and long-term technical strategy. Design, develop, and oversee the delivery of robust, production-grade software ...