851 to 875 of 1,334 Senior Software Engineer Jobs

# Senior Contract Software Engineer (JavaScript) - FirefoxMozillaSalary not statedContractremote· seniorUKjavascriptListed via Jobicy · posted 28 Oct 2026. The application happens there, not on DevConnect.Apply on Jobicy## DescriptionThe roleYou will help the Firefox DOM Core team improve the health of the Session History area. You will write tests … iterate to landingDefinition of doneImproved Session History test coverage and code correctness in Gecko, measured by passed test cases, allowing the team’s senior engineers to focus on security, performance and strategic projects.Required qualifications- Substantial experience in a browser-engine codebase or in automating for a browser-engine, ideally ...

recruiting a Lead Software Engineer in Winnersh (Hybrid) to design, develop and deliver high‐quality software within an agile team. The role focuses on integrating hardware, software and courseware components for UK armed forces projects, with collaboration across suppliers and end users. You will drive technical ...

allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The Software organization develops software applications, including integration and test on missiles, launchers, radars, naval systems, fire control and other complex systems. Our precision software and firmware integrate operating systems, device drivers, networking, and control software to bring together sensor, guidance, and flight control processing features to complete the mission. The Software org is made up of several Centers located across the country, responsible for all aspects of the software development ...

Waters Corporation’s Clinical Systems Development Software team seeks Senior Software Engineers to help build software for the clinical market. Based in the Wilmslow facility, you’ll develop software with C#/.NET, Python, Angular, and related database technologies in a collaborative, cross-disciplinary environment. … work with a multidisciplinary team of software engineers, R&D scientists, evaluators, and hardware developers. #J-18808-Ljbffr ...

Spectrum IT Recruitment is partnering with an innovative technology business in Southampton to recruit a Senior Software Engineer. The role focuses on C/C++ software development for 5G NR PHY, with emphasis on multithreaded and high-performance systems. You will work across software, hardware, architecture … system-test teams to tackle performance challenges and shape reliable software in a demanding technical environment. #J-18808-Ljbffr ...

Redline Group in Hertfordshire is seeking a Senior Embedded Software Engineer to develop high-quality embedded software for real-time control and data acquisition in a regulated environment. You will collaborate with cross-functional teams to drive architectural decisions and ensure product performance across lifecycle stages. ...

client is a leading global investment bank. JOB DESCRIPTION We are looking for a curious, impact-driven engineer who thrives at the intersection of data, product, and platform someone who can turn complex engineering signals into clear, compelling insights that drive decisions at scale. We invest in the tools … talent that make great engineering possible, and this role sits at the heart of that mission. As a Senior Lead Software Engineer at our client within the Engineering Efficiency and Analytics team, you will design and deliver a firmwide metrics and analytics platform that brings visibility ...

Addition Solutions in Farnborough is seeking a Senior/Principal Embedded Software Engineer to join a highly skilled team. You will work on embedded software across software, FPGA and RF technologies in a defence/cyber context, contributing to research, ideation, prototyping and full product ...

Vodafone VOIS is seeking a Senior AI Software Engineer to build, test and operate production-grade software using AI-native engineering practices. You will translate designs into secure, reliable software and work in a cross-functional team to deliver customer-focused digital capabilities. The role ...

Sr. Software Engineer - Portfolio Data Workflows Edinburgh, UK Who We Are Addepar is a global data and AI platform empowering investment professionals to turn complex financial information into actionable intelligence. Addepar unifies portfolio, market and client data in a total portfolio view and delivers AI-powered insights within … firms in 60 countries use Addepar to manage and advise on nearly $10 trillion in assets. Its open platform integrates with 650 software, data and consulting partners to power end-to-end investment operations across firms of all sizes and levels of complexity. Addepar supports clients worldwide with offices ...

Location: Chesterfield Model: Onsite Scope: Full Time Description: We are seeking an experienced Embedded Software Engineer to play a key role in the design and development of innovative embedded systems and applications. This position offers the opportunity to work across the full product development lifecycle, contributing to software architecture, embedded development, hardware integration, and the delivery of reliable, high-performance solutions. Key Responsibilities Design, develop, test, and maintain software for embedded and real-time systems. Contribute to software architecture, system design, and technical decision-making across product development projects. Develop robust applications using C/ ...

Elekta is seeking a software engineer to join a team developing applications for radiotherapy systems. You will contribute to the full software lifecycle, from design and development to testing and deployment, ensuring high quality delivery in a collaborative Agile environment. The role requires a degree in Engineering … Computer Science or equivalent, strong software engineering foundations, and experience with CI/CD, unit testing and modern cloud or containerised environments. #J-18808-Ljbffr ...

Fiserv is seeking a Senior Software Developer to design, develop, and maintain high-quality software offerings. You will join a team focusing on Merchants Onboarding & Client Implementations, shaping scalable, resilient systems. You will work with event-driven architectures, microservices in Java, and cloud-native deployments, leveraging Kafka ...

Contract: ContractLocation: London, WaterlooPay: CompetitiveConsultant: Joe MooreExciting opportunity for a Senior C++ Software Engineer to join this Global Commodities Trading Company. This is an exciting time to be joining this world-leading company with this role working in one of the company's premier software development … projects contributing to enhancing trading capabilities. The team requires an experienced C++ Engineer with a demonstrated background in building scalable Derivatives Algorithmic Trading Platforms. You must have a demonstrated understanding of major global futures exchanges and knowledge of the full exchange-traded derivatives trade lifecycle. Key Experience Required ...

enjoy solving deep systems problems and enabling others through great developer experience, you’ll find meaningful impact and growth here. Job Summary: As a Senior Lead Software Engineer in Corporate Technology – AI, Machine Learning and Data Platform, you will lead the design and delivery of secure, stable … reinforce inclusive, high‐accountability ways of working. Job Responsibilities Lead the design and delivery of platform standards and tooling such as command line interfaces, software development kits, libraries, templates, and automated checks to simplify adoption and day‐to‐day use Engineer and operate production large language model inference ...

team of passionate thinkers, innovators, and dreamers - and help us connect people and build communities to create economic opportunity for all. Role Summary The Senior Engineer in the Identity Domain provides senior technical leadership for identity services across the platform. This role defines and evolves enterprise-wide … identity and access management (IAM) capabilities, influencing architecture, engineering standards, and execution across multiple teams. The Senior Engineer sets technical direction for authentication, authorization, and identity federation, drives adoption of modern identity standards, and ensures identity is implemented as a consistent, secure platform capability. Key Responsibilities Technical Leadership ...

will have room to learn, develop your skills, and take on meaningful ownership. If you enjoy solving complex problems and improving how teams deliver software, you will feel at home here. We value curiosity, teamwork, and a culture where everyone can contribute. As a Senior Lead Software Engineer at JPMorgan Chase in the Strategic Index Technology team, you will lead key projects that support our cross-markets index platform. You will partner closely with colleagues across Quantitative Research, Structuring, Trading, Sales, and Middle Office to deliver high-quality software. You will help evolve our technology ...

Riverlane seeks a Senior Embedded Software Engineer for the Systems Team in Cambridge. You will bridge Riverlane with customers, enabling integration of the Deltaflow hardware and software stack with quantum computers, ensuring low-latency, high-throughput operation and robust debugging. You will help implement Riverlane ...

Barclays Senior AI Software Engineer role based at our Knutsford office focuses on designing, developing, and implementing intelligent software solutions that drive innovation and measurable business value. You will collaborate with AI Architects, Data Engineers, Data Scientists, Product teams, and Engineering colleagues to build scalable, secure ...

MAXTRAMAX is seeking a Senior AI Software Engineer/AI Model Specialist to design, develop, train, test, and deploy advanced AI solutions for commercial, government, and security-focused applications. You will build scalable AI models and integrate them into robust software stacks. The role requires deep … expertise in AI/ML, strong software development skills, and the ability to work with distributed international teams in a remote/hybrid environment. #J-18808-Ljbffr ...

deploy at scale while also delivering AI-powered assurance insights within Cisco’s leading Networking, Security, Collaboration, and Observability portfolios. Your Impact As a Software Engineer you will: Design, build, test, and operate near real time data streaming-based (Spark/Flink) solutions for some of the largest … architecture of our AI development platform. Improve engineering processes, documentation, and operational practices across the team. Minimum Qualifications Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience. Professional software development experience using Python, Java, or Go. Experience designing, building, testing ...

Rack-scale co-design of logic, data movement, packaging, optics and interconnect enables a step change in system level performance. The Role As a Senior Embedded Software Engineer, you will own a component of the DX-1 platform firmware end to end, from simulation through FPGA prototypes … first silicon into production. The Embedded team builds the software that makes the platform bootable, manageable and observable: boot and update, platform management on the BMC, embedded Linux on the platform processors, real-time firmware on resource-constrained cores, and register-level control of the ASIC. The kind ...

serves society. Our work centers on four pillars: AD/ADAS, our autonomous driving and advanced driver assist technologies; Arene, our software development platform for software-defined vehicles; Woven City, a test course for mobility; and Cloud & AI, the digital infrastructure powering our collaborative foundation. Business-critical functions … world with zero accidents and enhanced well-being for all. TEAM Arene’s goal is to open vehicle programming to everyone by simplifying vehicle software development and increasing deployment frequency without compromising safety and security. This will create a whole new market of vehicle application developers who, through software ...

London, United Kingdom | Posted on 29/07/2026 Build software that powers unmanned systems already deployed in the real world. At sees.ai , we’ve developed a system that is already being used to inspect critical national infrastructure — operating in live environments, not simulations. Now, following a major … contract with National Grid and recent investment, we’re scaling that system into a robust, production-ready platform. We’re looking for a Senior C++ Software Engineer to help take a working system and evolve it into something reliable, scalable, and ready for wider deployment. The Role ...

easyJet holidays in Luton is hiring a Senior Software Engineer. In this role, you’ll design and develop software that powers millions of customer journeys. Your contribution will enhance the reliability and scalability of systems within a collaborative team environment. You'll have the opportunity to work … significant technical challenges and influence software quality. The position offers competitive salary, 25 days holiday, and other benefits while embracing an inclusive culture. #J-18808-Ljbffr ...