101 to 125 of 300 Permanent Senior Software Engineer Jobs

Senior Software Engineer – AI Startup – Up to 160k 🚀🧠 💰 Salary: £70,000 - £160,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 2/3 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite … world problems with the latest in AI and LLMs, this role is for you. In this role, you’ll: 🔧 Build and ship high-impact software 🧠 Work on AI/LLM-powered automation tools used in production 🏗️ Help shape scalable systems and infrastructure 🌍 Work collectively across teams to push ...

hiring a Senior Software Engineer to lead end-to-end feature development and architectural design. This role is built for a technical leader who prioritizes high-impact delivery over routine maintenance. Tech Stack Backend: Python, FastAPI, Ruby on Rails Frontend: React.js, Next.js, React Native Cloud: AWS, Terraform … Python or Ruby on Rails + React/Next.js or React Native) Prior experience liaising with product teams and business stakeholders Solid understanding of software architecture, design patterns, and automated testing Ability to design and deliver complex features from scratch and communicate them to non-technical stakeholders Excellent problem ...

Senior Software Engineer looking for an interesting job opportunity? Please make sure you read the following details carefully before making any applications. Our client, TKMS ATLAS UK, are seeking a Senior Software Engineer with skills in Java to work on the development of marine ...

Senior Software Engineer (.NET/C#) | Greenfield Systems Rebuild | Remote | £80,000–£100,000 This is a hands-on senior engineering role with real technical authority. You will be the lead engineer and technical decision-maker on a greenfield rebuild of a mission-critical system … working within a small, senior team and reporting directly to the Head of Technology. Once the build is delivered, the role expands into enterprise architecture responsibilities. If you are a strong .NET engineer who has been moving into architecture and wants to own the outcome rather than advise ...

Senior Software Engineer - Geospatial Data (Contract) Location: Farnborough (3 days per week onsite) Contract Length: Initial 3-month contract IR35 Status: Outside IR35 Security Clearance: All candidates must be eligible for security clearance prior to appointment. We are seeking an experienced Senior Software Engineer ...

Senior Embedded Software Engineer (Senior or Principal) — IoT & Space Systems Join a pioneering team building the next generation of space-powered IoT solutions. My client are developing a highly advanced satellite network that connects billions of devices worldwide — enabling users to sense, track … data anywhere on the planet. As a Senior Embedded Software Engineer , you’ll design and optimize software for low-power, battery-operated IoT devices that communicate through space-based systems. You’ll focus on performance, power efficiency, system reliability, and automated testing frameworks. Key Responsibilities Embedded ...

Senior Software Engineer – AI/Agentic Systems London (Hybrid) We’re partnering with a cutting-edge AI startup redefining how intelligent systems operate at scale. Their mission is ambitious: to push the boundaries of agentic AI and build platforms that automate complex, multi-step human workflows—unlocking … alongside world-class AI talent, and directly shape a platform sitting at the intersection of research and real-world deployment. The Opportunity As a Senior Software Engineer , you’ll play a key role in building and scaling an enterprise-grade AI platform. You’ll operate ...

Senior Software Engineer JavaScript, C++, Linux, IoT, Kubernetes, Microservices Southampton, Romsey, Hampshire (Onsite) £65,000 - £75,000 + pension & benefits Are you a talented Software Engineer who thrives on solving real-world problems with cutting-edge technology? This is an opportunity to join a talented … engineering team building advanced, real-time software systems used in safety-critical environments worldwide. You'll be working at the intersection of enterprise software, IoT, and data-driven decision-making; developing solutions that genuinely make a difference. Why this role is exciting This isn't just another enterprise ...

Senior Software Engineer .NET/AWS/React Manchester or Leeds Hybrid (2 days onsite) £70,000 + 10% Bonus A leading enterprise SaaS organisation is scaling its Product Engineering function and is looking for Senior Software Engineers to help build and evolve large-scale … moving enterprise IT environment. The engineering teams here are focused on modern product development, cloud-native architecture, scalable distributed systems, and building high-quality software that directly impacts real users and real-world transactions at scale. Youll join a collaborative engineering culture where software engineers are encouraged ...

Senior Software Engineer Location: Near Winchester Salary: Up to £65,000 Clearance: Must hold SC Clearance and be eligible for DV To Apply: Email Overview A leading technology organisation within the defence and national security sector is seeking a Senior Software Engineer to join ...

shapes the industry, we'd like to hear from you. UNITED KINGDOM, REMOTE/FULL-TIME Role Summary: We are looking for a Senior Software Engineer (full-stack) to develop the Logiq platform. Working closely with our Head of Product, you will be responsible for building software … safe enough for ideas to be challenged in a constructive manner. Curious. Curiosity drives improvement and innovation. Always ask why. The Role: As a Senior Software Engineer, you will be responsible for the long-term technical direction of the Logiq platform and products, which provide real-time ...

scale up our tech team with the very best engineers to supercharge our growth. We are looking for a bright, driven, full-stack Senior Software Engineer who is excited about solving complex problems and building scalable platforms. The role As a Senior Software Engineer … Understand complex business problems then propose and implement technical solutions Have input into the architecture, working closely with the Head of Technology and other senior team members Work with other engineers and the business to improve user experiences Bring your experience and enthusiasm to our engineering culture Promote excellence ...

Senior Software Engineer Tech: TypeScript/Kotlin. Back End Agnostics welcome. Office : Remote, but meet up once a month or so in London. Level : Upper Senior or Staff/Principal Level. Salary : £100-140k Eng Size : 50 We’re working with a globally recognised platform … helping organisations build more ethical practices and infrastructure. They’re looking for a very Senior Engineer who combines strong product instincts with the experience of building in fast-moving, scaling environments. This role is for someone who’s been a pivotal engineer during a scale-up phase. ...

Senior Software Engineer (.NET/AWS) Location: Manchester/Hybrid Salary: Up to £75,000 + benefits The Role We are looking to hire experienced Senior Software Engineers to join a growing engineering function. You'll play a key role in designing and building scalable ...

Senior Software Engineer (.NET/AWS) Location: Manchester/Hybrid Salary: Up to £75,000 + benefits The Role We are looking to hire experienced Senior Software Engineers to join a growing engineering function. You'll play a key role in designing and building scalable ...

Senior Software Engineer JavaScript, C++, Linux, IoT, Kubernetes, Microservices Southampton, Romsey, Hampshire (Onsite) £65,000 - £75,000 + pension & benefits Are you a talented Software Engineer who thrives on solving real-world problems with cutting-edge technology? This is an opportunity to join a talented … engineering team building advanced, real-time software systems used in safety-critical envir... LFWQ1_UKTJ ...

Senior Software Engineer JavaScript, C++, Linux, IoT, Kubernetes, Microservices Southampton, Romsey, Hampshire (Onsite) £65,000 - £75,000 + pension & benefits Are you a talented Software Engineer who thrives on solving real-world problems with cutting-edge technology? This is an opportunity to join a talented … engineering team building advanced, real-time software systems used in safety-critical envir click apply for full job details ...

Have you built low-latency, high-performance systems and want to work at the cutting edge of crypto trading infrastructure? Senior Software Engineer (C++) - Crypto Trading Salary: up to £185k + bonus + RSUs Location: Fully Remote We are delighted to be continuing our partnership with … APIs, all within a low-latency, high-throughput environment serving millions of users and institutions worldwide. They are looking for the following experience in Senior Software Engineers: Strong C++ development (5+ years) Low latency, high-performance systems Highly concurrent/distributed systems (Linux environment) Experience within trading, financial ...

Senior Software Engineer Milton Keynes (One day a week on site) Up to £80,000 per annum plus bonus VIQU are working with an international organisation in Milton Keynes who are hiring multiple senior software engineers to help build one of their product lines. xxuwjjq … This role will focus on shaping architectural decisions, hands on coding and mentoring other software engineers. Key technology stack spans C#, Interested in this role You can find all the relevant information in the description below. Please click on the apply button to read the full job description ...

employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Software Engineer SMES Job Code: 36284 Job Location: Camden, NJ (On-Site) Schedule: 9/80 Regular (Every Other Friday … Description: L3Harris Space Mission Systems is seeking a Senior Software Engineer. Responsibilities include leading a software development team, analyzing requirements and the translation of requirements into working and maintainable solutions, planning the development, assigning budgets and tasks, tracking teams' status, measuring teams work performed utilizing Earned Value ...

employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Software Engineer SMES Job Code: 36284 Job Location: Camden, NJ (On-Site) Schedule: 9/80 Regular (Every Other Friday … Description: L3Harris Space Mission Systems is seeking a Senior Software Engineer. Responsibilities include leading a software development team, analyzing requirements and the translation of requirements into working and maintainable solutions, planning the development, assigning budgets and tasks, tracking teams' status, measuring teams work performed utilizing Earned Value ...

employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Software Engineer SMES Job Code: 36284 Job Location: Camden, NJ (On-Site) Schedule: 9/80 Regular (Every Other Friday … Description: L3Harris Space Mission Systems is seeking a Senior Software Engineer. Responsibilities include leading a software development team, analyzing requirements and the translation of requirements into working and maintainable solutions, planning the development, assigning budgets and tasks, tracking teams' status, measuring teams work performed utilizing Earned Value ...

Senior Software Engineer Python London, N7 (Hybrid) £75,000 £90,000 + Equity Deep Tech Scale-Up Sponsorship available - have to be a UK resident and based locally to the role. Were partnered with a well-funded deep tech scale-up with a global footprint, currently scaling … their internal platforms and looking for a Senior Cloud Software Engineer to play a key role in building systems that support cutting-edge research and engineering. This is a high-impact opportunity to work in a complex, hybrid environment (cloud and physical systems), where your work directly ...

SENIOR SOFTWARE ENGINEER £85,000 LONDON We're working with a well-established digital media and technology organisation who are growing their engineering function and hiring Senior Software Engineers to help shape the next phase of their internal platforms. This role suits engineers who enjoy … Product, Architecture, and other Engineering teams to ensure solutions are well-designed and fit for purpose Act as a technical sounding board for less-senior engineers, providing guidance and reviewing approaches rather than simply approving code Ensure code quality, performance, and maintainability across the platform TECH STACK Node.js (backend ...

Senior Embedded Software Engineer with hands-on experience encompassing Embedded Linux, low-level driver work, networking and backend service development will take responsibility for designing and developing embedded software for Digital RF and related products. This role offers a competitive salary with very flexible hybrid working … generous benefits. The Senior Embedded Software Engineer will bring: A minimum of a good Bachelors Degree in Software Engineering, Electronics, Computer Science or similar discipline. Strong programming skills in C. Several years of industrial embedded software development. Strong Linux experience including Embedded Linux development ...