501 to 525 of 592 Software Engineering Jobs in the City of London

London that actively trades on over eighty venues with daily volume of almost $300bn. Providing liquidity in Equity, FX, Fixed Income, Commodity & Options, they are looking for a C++ Software Engineer to join their exchange trading development team. This is a hybrid role based in London. **Market leading salary + bonus** Requirements : Strong knowledge of modern C++ (C++11 onwards … algorithms and data structures and their performance trade-off. Work independently designing complex systems that need to run uninterrupted for long periods of time. Practical experience designing and implementing software systems is a plus. Familiarity with the Linux command line and common tools is a plus but by not a necessity. Prior finance knowledge is not required. If this More ❯

Software Engineer | DeFi | On-site | London | Salary Dependent On Experience About the Company: Our client is quantitative cryptocurrency trading firm specializing in high-frequency trading (HFT) across digital asset markets. They operate with the speed, precision, and sophistication of a traditional prop trading firm but fully optimized for decentralized and centralized crypto exchanges. The Role: The ideal candidate will … ownership across DeFi integrations and trading infrastructure Interface with protocol teams and external projects to support new market opportunities What We're Looking For: 1–4 years of professional software development experience Strong programming skills and the ability to write clean, testable, and efficient code A solid grasp of core computer science principles: algorithms, data structures, concurrency, networking, etc. More ❯

Java Software Engineer Provider of FX Trading Solutions seek Java Engineers to work on low latency, high performance, real time applications. You will have the opportunity to build high-speed, data-intensive applications that scale elastically meet tough performance requirements. You will work within a pod of 5 on core trading services, order routing, FIX connectivity, real-time price More ❯

have just raised a significant pre-seed round to invest in our product and accelerate our growth. Who We Are Looking For We’re searching for a full-stack software engineer who thrives in a fast-paced, high-growth environment and loves coding. If you want end-to-end ownership, career growth, and the chance to help shape a More ❯

Unity/C#/C++ Our client is looking for a Lead Engineer within the AR/VR/XR world. The Lead Engineer must be hands on but also be willing to step up to leadership and take responsibility More ❯

London/Start-Up/React We are working with one of the fastest growing tech start-ups in London and looking for a Front End Developer who combines strong technical skills with a sharp eye for design. You’ll More ❯

Flagship Strats Hire - Top Python Engineers – Market Leading Hedge Fund - Up To £400k tc One of the world's very best trading firms is seeking a flagship hire to join their front office strats team, to carry out a variety More ❯

Infrastructure Software Engineer – LLM Evaluations 📍 London · 🕐 Full-time · 🏢 On-site We're looking for an experienced Infrastructure Software Engineer to help build and maintain the systems that support cutting-edge evaluations of large language models (LLMs). You’ll lead decisions on infrastructure design, scale our evaluation tools, and work closely with researchers to support future needs. Responsibilities … and manage scalable infrastructure for LLM evaluations (IaC, AWS, Kubernetes) Develop internal tools for orchestration, access, storage, and debugging Lead on cloud security and infrastructure best practices Collaborate across engineering and research to support experimental deployments You should have: Strong engineering skills (preferably in Python) Hands-on experience with AWS, Kubernetes, and Terraform A track record of leading More ❯

Infrastructure Software Engineer – LLM Evaluations 📍 London · 🕐 Full-time · 🏢 On-site We're looking for an experienced Infrastructure Software Engineer to help build and maintain the systems that support cutting-edge evaluations of large language models (LLMs). You’ll lead decisions on infrastructure design, scale our evaluation tools, and work closely with researchers to support future needs. Responsibilities … and manage scalable infrastructure for LLM evaluations (IaC, AWS, Kubernetes) Develop internal tools for orchestration, access, storage, and debugging Lead on cloud security and infrastructure best practices Collaborate across engineering and research to support experimental deployments You should have: Strong engineering skills (preferably in Python) Hands-on experience with AWS, Kubernetes, and Terraform A track record of leading More ❯

firm requires a senior application security engineer! The Role: As a Senior Application Security Engineer here, you'll sit within CTO, assisting a wide range of delivery teams in engineering secure solutions and protecting our member's money and data. As a senior security engineer, you will work cross-functionally to assess risk and help deliver countermeasures that protect … our member's data. You will work will engineering teams to create solutions that solve or remediate security problems. This will involve a range of activities, including (but not limited to) threat modelling, selection and configuration of DevSecOps tools, high-level and detailed security designs. Key Responsibilities: We are seeking a Senior Security Engineer who has experience in the … design and implementation of secure software. You should possess verifiable experience in: Strong technical knowledge - a comprehensive understanding of software engineering principles, system architecture, and contemporary development frameworks. Threat modeling, as well as the design and implementation of security controls (either in a cloud environment or on-premises). Familiarity with cryptographic primitives and protocols. Proficiency in at More ❯

strategies and customer journeys for mobile and digital banking Collaborate with stakeholders to gather and refine business requirements About Us: Ascendion is a global, leading provider of AI-first software engineering services, delivering transformative solutions across North America, APAC, and Europe. We are headquartered in New Jersey. We combine technology and talent to deliver tech debt relief, improve … engineering productivity solutions, and accelerate time to value, driving our clients’ digital journeys with efficiency and velocity. Guided by our “Engineering to the power of AI” [EngineeringAI] methodology, we integrate AI into software engineering, enterprise operations, and talent orchestration, to address critical challenges of trust, speed, and capital. For more information, please go to www.ascendion.com With More ❯

delivering end to end projects and feature requests against the technology department product roadmap. Reporting into the Technical Program Manager, the position will work alongside product managers, designers and engineering team leads to manage the delivery of key projects and feature requests, focusing on prioritising items that add the greatest value to Footballco and making sure items are delivered … to agreed timescales. A core responsibility of the Junior Technical Project Manager will be managing daily standups and ceremonies and working closely with the engineering team leads to optimise the engineering teams time and resources. Assisting engineering team leads and principle in technical problem solving and agreeing on resources capable of delivering specific epics. The Junior Technical … with updated and helping technical leaders to prioritise against available resources What You'll be doing: Global delivery of key items on the technology roadmap Technical problem solving with engineering leaders to release bottlenecks in delivery Manage daily standups and ceremonies with software engineering teams Resource planning and capacity management within the software engineering teams More ❯

Job Title: Senior Backend Software Engineer (Python) Industry: Web3 Gaming Location: Remote Salary: $75k-$150k The client is a provider of blockchain-enabled products, specialising in web3 gaming. This is an exciting opportunity for a passionate and skilled Senior Backend Software Engineer . The client is seeking an experienced engineer fluent in Python to build new web3 technologies … space and increase the accessibility of blockchain products. Responsibilities Designing and implementing backends for web3, blockchain products and smart contracts Implementing REST API Requirements 3+ years of experience in software engineering Fluency in Python as well as SQL Experience with Python web frameworks (Flask, FastAPI, Django etc.) Knowledge of cloud infrastructure Offer/Benefits Competitive salary ($75k-$150k More ❯

consulting services within Valiantys, focusing on Developer Experience (DevEx). Reporting to the Transformation Consulting Director, this role is responsible for executing transformation initiatives that enhance developer productivity, streamline software delivery processes, and align development operations with business objectives. The Transformation Consultant will work closely with clients to assess, design, and implement improvements in DevEx areas, including tooling, workflows … working on: Transformation Delivery Design and implement DevEx solutions, leveraging the Atlassian ecosystem and adjacent technologies; Support transformation project; Integrate AI-driven solutions and automation to enhance efficiency in software development processes; Ensure transformation solutions align with governance, security, and compliance best practices. Client Engagement & Presales Participate in presales engagements; Conduct discovery sessions, assessments, and proof-of-value engagements … teams; Contribute to the development of reusable assets, playbooks, and accelerators that enhance delivery efficiency; Stay up-to-date on the latest developer productivity trends, DevOps methodologies, AI-powered engineering, and platform engineering practices; Act as a trusted advisor on Atlassian-powered transformation projects. Do you have what it takes to be a Transformation Consultant : This is an More ❯

data, market data and GOM configurations (permissions, settings, FO desk). Not mandatory but recommendable knowledge on MRB module. About Us: Ascendion is a leading provider of AI-first software engineering services. Our applied AI, software engineering, cloud, data, experience design, and talent transformation capabilities accelerate innovation for Global 2000 clients. Ascendion is headquartered in New More ❯

AI Software Engineer (LLMs) | GenAI | £120k + Equity | Hybrid (London) One of the UK’s most technically ambitious GenAI startups is hiring an AI Software Engineer to join their core team building the brains behind a next-generation enterprise platform. Backed by $15M in Series A funding from top-tier VCs (early investors in Deliveroo and GoCardless), this … company is automating the development of custom software using cutting-edge generative AI, turning clients' requests into functional, high-quality software through AI. You’ll work closely with a former FAANG engineering lead who spent over a decade building LLM-based dev tools, using a stack that includes Python, LangChain, RAG, Rust, and Kubernetes. They’re looking More ❯

Engineer – Build the Future of Language with Us Location: Remote-first (UK or compatible time zones preferred) Type: Full-time | Permanent Salary: Competitive + Equity + Benefits Team: AI & Engineering What if your next role wasn’t just a job—but a mission? We’re on the hunt for a brilliant AI Engineer with a strong software engineering … best practices in CI/CD, testing, and observability for AI systems. Translate complex business needs into elegant, AI-driven solutions. What You Bring 5+ years of experience in software engineering and AI/ML development. Deep proficiency in Python and experience building scalable, distributed systems. Hands-on experience with LLMs, ML lifecycle tools (like MLflow, Weights & Biases More ❯

Backend Software Developer Python | C++ | Modelling environment SR2 is supporting a forward-leaning tech consultancy delivering simulation and decision-support tools into national security and public sector environments. They’re hiring a Backend Software Engineer to productionise and optimise agent-based models using modern technologies and simulation paradigms. This role sits closely within the data science team. You … ll contribute to the development of scalable simulations that generate valuable insights from large datasets, working in a secure and collaborative engineering environment. They’re looking for a Software Engineer with: Strong Python skills (core development language) C++ experience This involves real-time or near-real-time data processing, where experience with Apache Kafka is highly desirable, due More ❯

Exclusively via DATAHEAD Are you a detail-oriented Python Developer who thrives in complex data environments? Do you have hands-on experience with Databricks , PySpark , and cloud-native data engineering? We’re hiring a Data Engineer on behalf of a Fortune 500 firm undergoing a major data and analytics transformation. You’ll join a global Advanced Analytics function working … at the cutting edge of data science, engineering, and AI. Why this role? You’ll join a cross-functional team that includes data scientists, actuaries, software engineers, and AI specialists - all working together to build intelligent data platforms that power business-critical decisions across the organisation. This is a cloud-first, engineering-led environment where you’ll … clean, modular, and testable code aligned with SOLID principles Contribute to CI/CD pipelines , automated testing frameworks, and deployment tools Collaborate with stakeholders across data science, analytics, and engineering Build and expose RESTful APIs for secure data integration across platforms Help shape the data architecture that underpins machine learning and AI models What You’ll Bring: Proven experience More ❯

We are seeking a highly skilled Optimization Software Engineer to join an advanced analytics and decision science team. The ideal candidate will have a strong academic background and hands-on experience in developing sophisticated optimization solutions for large-scale, real-world business challenges. Key Responsibilities: Design and develop optimization models to solve complex business problems, leveraging Integer Programming (IP … and translate them into robust mathematical models. Conduct rigorous testing, performance tuning, and continuous improvement of optimization systems. Qualifications: PhD or Master’s degree in Operations Research, Mathematics, Industrial Engineering, Systems Engineering, or a related quantitative discipline. Proven experience in developing and deploying optimization solutions using Gurobi or CPLEX. Expert-level programming skills in Python or C#. Demonstrated More ❯

their elite, cross-functional team. Their mission? To redefine how the financial world works by replacing manual, complex workflows with intelligent, agentic AI systems. This is not your average engineering role. This is a launchpad into technical leadership , where you’ll operate like the CTO of a one-customer startup —building cutting-edge AI systems with direct ownership, autonomy … and visibility. 🔧 What You’ll Do Own the engineering relationship with a high-priority enterprise customer Build and ship real-world AI applications—end-to-end—from prototype to production Translate messy problems into powerful, scalable systems using LLMs and full stack tools Act as engineer, strategist, and product partner all in one Work closely with founders, researchers, and … AI engineers at the forefront of innovation ✅ What They’re Looking For 4+ years of experience in software engineering (or equivalent academic background) Proficiency in Python + React , and comfort working with production-grade AI systems Experience with LLMs or autonomous agents is a plus Entrepreneurial mindset—you’ve led projects or teams, and you're hungry to More ❯

your career. All aided with the experience of working with like minded individuals. Requirements: 4+ years professional experience with a KDB+ A Bachelors or Masters degree in Computer Science, Engineering, Mathematics or a related discipline Ability to work in a face paced environment 4+ years experience as a software Engineer/Developer More ❯

Join a high-performing Front Office Quant team within a leading global investment bank, where you'll work at the intersection of finance, advanced mathematics, and software engineering to support pricing, risk, and model integration across FX, Rates, Credit, and Equities. An interesting role that will suit somebody with quite distinct experience covering curve calibration and classical pricing … FICC business Advanced coding skills in C++11+ , with working knowledge of Python and Excel A strong relationship builder with experience with version control systems (such as Git) and distributed software development process. Extensive experience of leading teams , open-minded and team-oriented, with the ability to thrive in fast-paced environments and manage multiple priorities simultaneously While this role More ❯

ups. You’ll also get to know the wider business - working closely with the security, commercial, operations and compliance teams. Key skills and experiences: 5+ years experience as a software engineer working in a mobile development role. You’ll have demonstrable hands-on experience of delivering React Native apps to best practice standards. If you value clean, readable and … re-usable React-Native code. You’ll be passionate about software and an advocate of general engineering best practices such as domain-driven code architecture, encapsulation, separation of concerns, single responsibility, clean code practices, etc. You’ll have an excellent understanding of iOS and Android platform fundamentals. You’re familiar with the latest design patterns for mobile development More ❯

access to noteworthy industry veterans who you'd have as a reporting line. Requirements: 2+ years professional experience with a Rust A Bachelors or Masters degree in Computer Science, Engineering, Mathematics or a related discipline Developed low latency code Worked on high throughput/distributed systems Crypto trading engine experience 2+ years experience as a software Engineer/ More ❯