576 to 600 of 1,337 Senior Software Engineer Jobs

What we do. Electric Car Leasing Why we do it. Greener. Fairer. Future. We're looking for a Senior Software Engineer (Python) to join our product and engineering team building the systems that power our ability to revolutionise the electric car leasing industry. Our tech stack … Contribute ideas, share knowledge, support, mentor, and raise the game of those around you. What you'll need... Deep expertise in Python, with strong software engineering fundamentals. Proven experience designing and building APIs, ideally using GraphQL. Comfort working with multiple data sources, including relational (PostgreSQL) and NoSQL databases. Excellent ...

Details Date Posted: 2026-09-24 Country: United Kingdom Location: London, London, City of Position Role Type: Onsite Senior Software Engineer Location: London Permanent Onsite Due to the interesting work we do and the sector this team is working in, we require all candidates to hold … teams work synchronously with our customers to solve some of the toughest digital challenges faced in the world today. Role & Responsibilities Design and build software using industry best practice Collaborate with stakeholders and other engineers Contribute to the completion of milestones associated with your project Contribute to continuous improvement ...

easyJet Airline Company PLC is seeking a Senior Software Engineer in Luton, with hybrid working and 60% in-office time per month. You will design, build and operate scalable software, solving complex technical challenges within a product-focused squad. You'll contribute to architecture discussions, improve … reliability and performance, and mentor others while delivering high-quality software for millions of customer journeys. #J-18808-Ljbffr ...

OneAdvanced is seeking a Senior Software Engineer in Birmingham to help evolve Vision, a large-scale clinical practice management system used by GP surgeries and clinics. You will work across a complex C++/COM/C#/.NET codebase, modernising technology and embracing AI-enabled development ...

GCHQ, the UK intelligence agency, is seeking a Senior Software Engineer in Cheltenham or Manchester to help design and deliver mission-critical software. You will contribute to architecture, code quality, and DevOps practices, with a focus on scalable, secure systems. Candidates should have strong skills in C++ ...

Millbrook Healthcare Group is seeking a Senior Software Engineer for a 24-month fixed-term contract in Southampton. You will own complex changes from design through to production, combining legacy VB.NET/C# and modern .NET with React/TypeScript in a mixed estate. The role ...

central London with the business-centric atmosphere of the City, making it an attractive hub for professionals. Role Overview We're hiring a Senior Software Engineer, Web! We build websites that handle millions of requests per day, presenting high-quality market data to our members … care about automation. We are looking for like-minded individuals to join us. Your responsibilities will be: Design, implement, extend, and maintain web software functionality, often requiring advanced knowledge and experience. Create customer documentation. Act as project manager for a feature across multiple parties. Strong Python and Linux knowledge. ...

capabilities that support researchers, reviewers, and editors throughout the submission and peer review journey, helping improve the overall scientific publishing experience. Join our Software Engineering Team Our dynamic Agile Teams deliver the technology which facilitates researchers bringing their work to the world via trusted journals through peer-review. About … Role As a Senior Software Engineer, you will build capabilities to support scientific researchers through the process of submitting the research for publication and undertaking peer-reviews others work. We are continually evolving our technology in response to researchers’ needs and to the ever-changing technical landscape ...

coming; it’s here, and we need builders, innovators, and problem solvers to help us create it. Who you are Metropolis is seeking a Senior Software Engineer to join our AeroParker application development team to help drive our next phase of global growth. As a member … What we’re looking for MS or BS in Computer Science or equivalent work experience with strong fundamental computer science skills 7+ years of software engineering experience, featuring advanced level knowledge of Scala, Java, or related languages Demonstrate a proven track record of designing and delivering large-scale distributed ...

deploy at scale while also delivering AI-powered assurance insights within Cisco's leading Networking, Security, Collaboration, and Observability portfolios. Your Impact As a Senior Software Engineer you will: Design, build, test, and operate near real time data streaming-based (Spark/Flink) solutions for some … discussions and help evolve the architecture of our AI development platform. Improve engineering processes, documentation, and operational practices across the team. Minimum Qualifications Professional software development experience using Java within a production environment. Experience across the full lifecycle (designing, building, testing, and operating) of real-time data processing pipelines ...

deploy at scale while also delivering AI-powered assurance insights within Cisco’s leading Networking, Security, Collaboration, and Observability portfolios. Your Impact As a Senior Software Engineer you will: Design, build, test, and operate near real time data streaming-based (Spark/Flink) solutions for some … discussions and help evolve the architecture of our AI development platform. Improve engineering processes, documentation, and operational practices across the team. Minimum Qualifications Professional software development experience using Java within a production environment. Experience across the full lifecycle (designing, building, testing, and operating) of real-time data processing pipelines ...

that are accurate, auditable, and suitable for high-trust, high-stakes applications – where precision, traceability, and compliance are essential.The RoleWe're looking for a Senior Software Engineer to be the Tech Lead for Uncheck, our accounting disclosure product, and lead its planning and delivery as it scales … enterprise scale, and we are expanding it into new regions and markets.This role is ideal for someone who enjoys leading the delivery of software as much as building it, and takes pride in delivering what has been promised. You'll work on planning and building a product that customers ...

IonQ, Inc. is hiring a Senior Software Engineer for the non-realtime controllers team in Oxford. You will own hardware control surface areas end to end, from device protocol to reliable fleet services. The role is hands-on and collaborative with software, systems, and quantum scientists ...

capabilities that support researchers, reviewers, and editors throughout the submission and peer review journey, helping improve the overall scientific publishing experience. Join our Software Engineering Team Our dynamic Agile Teams deliver the technology which facilitates researchers bringing their work to the world via trusted journals through peer-review. About … Role: As a Senior Software Engineer, you will build capabilities to support scientific researchers through the process of submitting the research for publication and undertaking peer-reviews others work. We are continually evolving our technology in response to researchers' needs and to the ever-changing technical landscape ...

accurate, auditable, and suitable for high-trust, high-stakes applications - where precision, traceability, and compliance are essential. The Role We're looking for a Senior Software Engineer to be the Tech Lead for Uncheck, our accounting disclosure product, and lead its planning and delivery as it scales … enterprise scale, and we are expanding it into new regions and markets. This role is ideal for someone who enjoys leading the delivery of software as much as building it, and takes pride in delivering what has been promised. You'll work on planning and building a product that ...

Unum UK is seeking a Senior Software Engineer to join an Agile team and drive architecture-aligned delivery across our application portfolio. You will mentor junior engineers, contribute to design decisions, and champion cloud-based, scalable solutions. You will work on features end-to-end, collaborating with ...

David A. Steinberg and John Sculley and is headquartered in New York City with offices around the world. The Role As a Senior Software Engineer you will provide technical leadership to the group responsible for architecting, developing, and owning the Addressability part of the Zeta Marketing Platform. … projects Participating in on‐call rotation (be available by phone or email in case something goes wrong) Desired Characteristics Minimum 4 years of software engineering experience Undergraduate degree in Computer Science (or related field) with English primary instruction (strongly desired) 2+ years of experience/fluency in Scala/ ...

payment and financial services arena. We have also successfully diversified into a number of other sectors. We now have a fantastic opportunity for Senior Software Engineer to join our Research and Development team on a fixed term basis. Within this role you will: Assist in the requirements … gathering process to help ensure requirements contain enough information and fact to support design, development and implementation. Participate in ‘Agile’ development team to develop software designs and specifications based on system level requirements and in accordance with defined development procedures. Actively participate in sprint and release planning, daily stand ...

Goodnotes is seeking a Senior Software Engineer to join our AI-native Paddington product line in London. You will work directly with the founder and a small team, owning the full software cycle from design to operation. You will ship changes with a squad and craft ...

Aurora Energy Research Limited in Oxford, UK, is seeking a Senior Software Engineer to turn product ideas into robust cloud-based solutions for the energy transition. You will work on microservices using TypeScript/ExpressJS/AWS Lambdas and React, delivering customer-facing software from design ...

GitHub is seeking a Senior Software Engineer to join the Git Systems Engineering team. You will design and ship highly scalable services for the GitHub code-hosting platform, focusing on performance, availability, and maintainability. The role involves cross-team collaboration and advancement of AI-driven software ...

Barclays is looking for a Senior Software Engineer - UI Platform Lead in Glasgow to shape and deliver a reusable UI platform. You will drive token-architectures, tooling, and platform integrations across Barclays digital experiences, leading architectural and engineering excellence. The role requires deep experience with React/ ...

CoreWeave is seeking a Senior Software Engineer to help build and scale our AI platform. You will write production-grade Python, contribute to a distributed architecture, and enable rapid deployment of AI products and MCP server integrations. You’ll own backend services, drive reliability, and collaborate with ...

Darktrace is seeking a Senior Software Engineer to own the prototyping and development of innovative ideas, balancing creativity with practical delivery. You’ll work with a cross-functional team across engineering, design, project coordination and technical strategy to scale Darktrace’s services. This hybrid role requires attendance ...

Checkatrade is hiring a Senior Software Engineer in Trust & Safety to own verification, reviews flow, and content moderation systems. You’ll lead incident responses, design robust event-driven workflows, and partner with vetting teams to uphold trust at scale. Expect strong TypeScript, Node.js, and full-stack capabilities ...