1 to 25 of 45 Permanent Java Jobs in the City of London

We are working with a leading client in the technology sector who are seeking several Senior Java Developers to join their growing team in London. Candidates MUST have experience with Java and Python programming languages. This is a hands-on role suited to an experienced Senior Developer with strong core Java expertise and a solid understanding of modern software engineering … to the design and development of high performance, scalable systems while mentoring junior team members and playing a key role in technical decision-making. Key Requirements: Extensive experience in Java development plus experience with Python . Strong understanding of microservices, distributed systems, and cloud technologies. Experience acting as a trusted advisor to key clients, helping shape their technology strategy aligned More ❯

Dynamics 365 Developer | London OR Birmingham OR Hook | Hybrid | 6 Months Initial Contract | Up to £650/day Inside IR35 | Omnichannel | JAVA | Our client is seeking a talented Dynamics 365 Developer to join their team and apply their knowledge and technical expertise to the delivery of Dynamics 365 and Power Platform solutions within a product-based organisation with an agile More ❯

Key technical skills, knowledge and professional qualifications provided: Databases – has a deep understanding of relational databases Use DevOps methods and work in an Agile environment Programming - expertise in Python, Java, Scala, or other programming languages used to build data pipelines, implement data transformations, and automate data workflows Has expertise in SQL AI and Machine Learning knowledge as it applies to More ❯

expertise in system architecture, distributed systems, cloud-native infrastructure (AWS or GCP), and event-driven design. Strong programming ability in one or more languages (e.g. TypeScript, Node.js, Python, Go, Java). Experience with DevOps practices, CI/CD pipelines, performance tuning, and monitoring tools. Solid database knowledge (SQL & NoSQL) and the judgment to choose the right tool for the job. More ❯

Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending December 2024 totaled $13.8 billion. Java Full Stack SME (Java with React) Responsibilities Lead full-stack development initiatives across enterprise-grade applications. Collaborate with cross-functional teams including product, design, and DevOps to deliver scalable and … work ethic and ability to work independently, as well as in an Agile environment. Skills Required 15+ years of strong experience in full-stack software development. Backend: Proficiency in Java (17+) , Spring Boot , Node.js , and RESTful APIs . Frontend: Expertise in React , TypeScript , HTML5 , CSS3 , and other modern frontend frameworks. DevOps: Familiarity with CI/CD tools such as GitHub More ❯

Scala and Java. Apply sound engineering principles such as test-driven development and modular design. Preferred Background Hands-on experience with Spark and Scala in commercial environments. Familiarity with Java and Python. Exposure to distributed data systems and cloud storage platforms. Experience designing data schemas and analytical databases. Use of AI tools to streamline development and debugging. Strong grasp of More ❯

for talented developers to join our team and contribute to the success driving innovation and excellence in our network infrastructure. Essential Technical Skills: Front-end: Angular, TypeScript Back-end: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs Version Control: Git CI/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus More ❯

salaries, our client offers an excellent working environment. Previous experience within the sports trading industry would be beneficial. Skills required: Proficient in several of the following: Python, C#, C++, Java Mathematical Modelling Mathematical skills, particularly a keen understanding of probabilities and statistics Analytic mindset Strong communication skills Accuracy and attention to detail Experience in data science (big data, deep learning More ❯

numerate field of study, such as Mathematics, Physics, Computer Science, or Engineering. Excellent coding ability in at least one language. Previous successful candidates are proficient users of Python, C++, Java, MATLAB, etc. Experience/knowledge of finance from academic studies, internships or professional work. Strong attention to detail, excellent problem-solving abilities, and the ability to work well in a More ❯

support and troubleshooting for production issues. Required Skills and Experience: Strong development skills in Gosu for Guidewire (3-5 years of experience). Experience in programming languages such as Java or C#.Net Familiarity with insurance industry standards and protocols. Excellent problem-solving skills and attention to detail. Strong communication skills and ability to work collaboratively in a team environment. Benefits More ❯

enterprise architecture principles. Collaborate with business and technology stakeholders to define current/target states, transition plans, and roadmaps. Design enterprise-level web applications using technologies such as Angular, Java/C#, and Python. Leverage AWS cloud services and both SQL and NoSQL database implementations. Champion best practices, policies, and design principles. Analyze business requirements to identify flexible, pragmatic architecture More ❯

Principal Software Engineer (Java) London – 1 day a week onsite 🚀 Join a FinTech Powering the Future of Payments Are you a seasoned individual contributor looking for a step up into a senior position within a high-performing team within the world of Banking/Payments? Are you passionate about high-throughput, real-time systems? This is your opportunity to help … secure transactions across the globe. 🔍 What You’ll Be Doing You’ll be the focal point of a high-performing engineering team building asynchronous, event-driven systems using modern Java technologies. Design and build scalable, high-availability systems processing millions of real-time transactions Work with Java 17+, Spring WebFlux, AKKA, Kafka, and more Write clean, testable code using TDD … Kanban/Scrum) 🧠 What You Bring We’re looking for engineers who are pragmatic, performance-focused, and thrive on solving complex distributed systems problems. Strong hands-on experience with Java 11+ (ideally Java 17) Solid knowledge of Reactive Programming (e.g., Spring WebFlux, AKKA) Experience with event-driven architecture, real-time messaging systems (Kafka, JMS) Familiarity with asynchronous request handling, scalability More ❯

Location: Mainly Remote – Occasional office visits in London. Salary: up to £95,000 + competitive benefits, depending on experience. Requirements: Experience in Native Mobile Development in Android (Kotlin and Java) Postman CI/CD Rest API Development Agile development methods such as Scrum or Kanban Must have leadership experience. These roles offer the chance to work on a number of More ❯

degree (PhD or Master's) in a quantitative discipline such as Mathematics, Physics, Computer Science, or Engineering. Strong programming skills in at least one core language - Python , C++ , or Java . Proven experience in quantitative research or systematic trading environments. Excellent communication skills and the ability to thrive in a highly collaborative, fast-paced team environment. What's on Offer More ❯

into clear technical specifications and solutions. • Strong documentation skills for technical requirements and custom development specs. • Familiar with Microsoft SQL Server, XML, APIs, and other OOP languages (e.g., C#, Java). Tooling & Standards: • Experienced with DevOps, GitHub, and automated testing tools. • Knowledge of ISO9001 and ISO27001 standards and integrated management systems. Consultancy & Mentoring: • Consultancy experience in Microsoft Dynamics NAV/ More ❯

Java Development Team Leader London This is a new and exclusive opportunity for a Software Development Team Leader focused on Java Full stack, to join a thriving business as they grow their software development team Role details Title: Development team lead Technical stack: Java full stack- back end and front end, React, Azure Location: London City 1 day a week … in the office leading your team Focus of the role: leading your team of 7 developer 5 back end java developers, 2 front end java react developers Permanent role salary £70-90,000 plus bonus and benefits This is a really interesting role and a great chance to join a team as they are really investing in their software development … have recently spent £35million on an entirely new sales portal, and this investment is continuing This role is for a Software development team lead who will focus on leading Java software development from the front (approx. 50% of the role) and leading the work of the full stack java developers under you- 7 in total. We are looking for a More ❯

environment. - Hands-on expertise in modern data engineering practices, cloud data platform and full data lifecycle. - Strong programming skills would be ideal for this position, languages such as Python, Java or Scala with Data pipeline frameworks and cloud infrastructure (AWS or Azure). - A proven track record of delivering innovative, data driven products from concept to production, ideally in a More ❯

tiered enterprise applications, strong experience with SaaS applications Strong knowledge in Integrating in Third Party systems using REST/SOAP. Knowledge of AWS, Azure, GCP and VMware. Background in Java or any programming language. Must be adaptable to work in a varied, fast paced exciting, ever changing environment Ability to work on multiple assignments. Strong core knowledge of ITIL processes. More ❯

in production support roles. Strong understanding of FX products: Spot, Forwards, NDFs, Swaps, Options. Familiarity with MXML, workflows, pricing engines, yield curves, risk/P&L figures. Technical background: Java, Unix/Linux, SQL (Sybase), Python/scripting, ITRS, Splunk. Exposure to ITIL processes and working in a regulated production support setting. More ❯

as part of a move from Calypso v17 to Calypso v18. What you'll need to succeed Recent Calypso experience (v16 onwards) Preferably experience working on upgrades Experienced in Java Devops experience (Ansible, Terraform, Git) What you'll get in return An exciting opportunity to join an international organisation working with a major financial services organisation. Furthermore, a competitive day More ❯

responsible for building and expanding upon their existing PKI infra-structure. Required skills and experience:- Experience of PKI lead or similar type roles. Experience in software development, preferably in Java and Python desirable . In depth experience with key ceremonies Experience in system development lifecycle and system integration is desirable. Proficiency in cryptography programming, nShield HSM (Hardware Security Module) Proficient More ❯

The Ideal Candidate Will Have: Deep expertise in Rates products and modeling (linear or non-linear) Strong programming skills in Python , plus OOP experience in C++/C#/Java A proven track record of building trading, pricing, or risk tools that directly support the front office A solid academic background - PhD or Master's in a quantitative discipline strongly More ❯

working on quantitative trading systems Advanced degree in Physics, Computer Science, Mathematics, Statistics, Engineering, or related discipline Proven quantitative and analytical skills with exceptional attention to detail Proficiency in Java, Kotlin, Python, or similar languages Strong knowledge of statistics and/or machine learning Experience with intraday strategies or high-frequency signals Experience with market making strategies Exposure to tick More ❯

in developing complex software with C#. A strong mathematical background would be advantageous but not required. Must have excellent communication and interpersonal skills. Expert in C# Development coupled with Java/jQuery Web development Web API, CSS. You will have solid SQL Server experience (stored procedures, table design and some maintenance). Microsoft Office including VBA and advanced skills in More ❯

Quantitative Developer - Equity Execution | Market Microstructure, Java, Python | £130,000 - £150,000 | London (Hybrid) a Quantitative Developer is required for a global trading firm for their Front Office electronic trading team in London. This is a VP-level role focused on the design, development, and optimisation of Real Time algorithmic execution strategies in the European equity markets. The position is … Model market microstructure behaviours, including auctions, queue dynamics, and liquidity conditions Work on initiatives such as signal-to-trade conversion, passive placement strategies, and fill probability field models Use Java (Java 8+) and Python to implement execution logic and support algorithm calibration Analyse trading performance using large-scale data to refine strategy outcomes and reduce slippage Work directly with quant … developer, execution strategy, or algo trading environment (buy-side or sell-side) Strong understanding of European equities market structure, venue fragmentation, and order routing Hands-on development experience with Java (concurrency, low-latency logic) or Python for analytics and modelling Background in quantitative research, electronic trading, or execution performance analysis Commercial mindset with ability to reason about Real Time trading More ❯