1 to 25 of 86 Permanent Senior Software Engineer Jobs in London

Senior Software Engineer (Python) – Reducing Carbon Emissions with Machine Learning! Python on AWS £90-£110,000 per annum plus stock London Office - 1-2 days a week Are you a Senior Software Engineer with a passion for working with curious, humble colleagues to build … exceptional customer-focused products using Python? Do you align with their principles – “Work as much as you want, where you want” - giving Software Engineers the autonomy and support to perform at their best? Do you want to be part of a period of significant growth and opportunity, shaping elegant ...

Senior Software Engineer C++ (Python, SQL, Linux, Trading, FinTech, Financial Technology, Low Latency, Backend) ***This is a hybrid role, 3 days remote and 2 days in the office*** Our client actively encourages diversity, equality and inclusion within its workforce and welcomes applications from a diverse background … Solutions Limited does not discriminate in regards to age, gender, national origin, religion or any other basis. An excellent opportunity has arisen for a Senior Software Engineer C++to join a friendly team my client are a well-established exchange (FinTech, Financial Technology) based in the City. ...

Senior Software Engineer/Developer (Java Python Messaging) London/WFH to £140k Are you a Senior Software Engineer with strong Java development experience within finance/trading environments? You could be progressing your career in a hands-on Senior Software Engineer … services that support fertility, pregnancy and menopause Employee Assistance Programme Retail discounts and more Continuous training and career progression opportunities Your role: As a Senior Software Engineer you'll design and develop real-time pricing and risk systems, collaborating closely with traders in a front office environment. ...

Senior Software Engineer | Distributed Systems | Sustainable Cloud Native Platform 💸Up to £110,000 per annum plus bonus plus stock 🏠Central London office 🖱️Golang, Rust, C, Kubernetes, Linux, Cloud Native, Distributed systems... Are you a Senior Software Engineer with extensive knowledge of building distributed systems … so... I'm partnered with a very exciting Cloud scale-up who have received record Series A funding and are looking for innovative Senior Software Engineers to join their ambitious team! With a new VP of Engineering who has spent much of their career building out a world ...

Senior Software Engineer/Developer (Python Data AWS) London/WFH to £90k Are you a data savvy Senior Software Engineer with strong Python and data engineering skills? You could be progressing your career in a senior, hands-on Software Engineer … Fintech who have built a highly complex, real-time energy trading platform to revolutionise energy buying for large industrial and commercial users. As a Senior Software Engineer you'll help to build a seamless digital experience that makes complex energy systems simple, powerful and intuitive. ...

Role: Senior Software Engineer Location: London Area, United Kingdom (Hybrid) Employment Type: Full-time Seniority: Senior Level Salary: £85,000 + Bonus Are you a highly experienced Software Engineer ready to take ownership of complex systems and drive engineering excellence in a fast-paced … environment? We're looking for a Senior Software Engineer to play a key role in designing and delivering scalable, high-quality software solutions. You'll operate at the heart of engineering-leading technical decisions, mentoring team members, and shaping architecture across modern, cloud-based platforms. This ...

Role: Senior Software Engineer - Front End Location : London/Newcastle – Hybrid Office & Home Who Are We? mkodo builds world class apps, middleware and digital products in the global lottery, betting, and gaming space. We have an open, supportive, dynamic culture where talented people are trusted to contribute … global lottery industries, brought mkodo strong financial security, access to resources and clients at a global level. About the role: Reporting to a Software Engineering Manager, the Senior Software Engineer is a major contributor and technical influencer within an engineering team delivering high-quality applications ...

Senior Software Engineer/Developer (Java Python Messaging) London/WFH to £140k Are you a Senior Software Engineer with strong Java development experience within finance/trading environments? You could be progressing your career in a hands-on Senior Software Engineer ...

Senior Software Engineer (Legal Tech/AI) — Python, React, TypeScript 📍 Location: London, hybrid 3 days on site 💸 Salary: Up to £120,000 + Equity 📈 Stage: Seed-funded, pre-launch AI Legal Tech startup ⚙️ Required Skills: Python, React, TypeScript, Nextjs We're partnered with a seed-funded, regulated … business at a real inflection point. Regulation is being finalised, the product is near-launch ready, and they're now looking for a Senior/Lead Software Engineer to own the security, scalability, and platform architecture of a product that will handle millions of pounds in client ...

Software Engineer (Senior) | C#/.Net & SQL Server | Systematic Hedge Fund Trading Live Markets Salary: £120,000 – £160,000 + bonus (up to 100%) Location: London (city) (primarily office-based) My client is a long-established systematic hedge fund, just under 20 people in total, with roughly … half the business sitting in engineering. They’ve been running for over two decades, quietly successful, and very deliberate about how they build both software and teams. You’d be sat directly on the trading floor in London, working alongside traders, engineers, and the CEO day to day. ...

Senior Software Engineer/Developer (Python Data AWS) London/WFH to £90k Are you a data savvy Senior Software Engineer with strong Python and data engineering skills? You could be progressing your career in a senior, hands-on Software Engineer ...

Senior Software Engineer - React/Node/Nest Developer - Remote - Shares scheme We're looking for a Senior Software Engineer to join a leading financial services organisation, where you will lead within a cross-functional squad, helping to build scalable, secure, and high-quality … teams in an Agile environment What you'll bring Strong hands-on experience with React, TypeScript, and Node (Nest) Proven background working as a Senior Engineer within agile, product-led environments, combining delivery with technical leadership Experience designing and working with micro frontends, BFF patterns, and modular, distributed ...

Senior Software Engineer - Gen AI 1 day a week onsite in Central London Salaries paying £80k-£120k + annual bonus Oliver Bernard have partnered with a rapidly growing FinTech in London who are building the next generation of AI based financial products. We are looking for Senior Software Engineers who have commercial experience with GenerativeAI and LLM integrations. You will be building Gen AI frontend agents and working on hybrid codebases with hosted prompts. This is a full stack opportunity working in their Gen AI team, working across Python, TypeScript and React. We are looking ...

Senior Software Engineer The Opportunity On behalf of a global powerhouse in FinTech Infrastructure , we are seeking a Senior Software Engineer . Our client operates one of the largest financial networks, serving as the digital backbone for thousands of global financial institutions. This … senior-tier appointment for an engineer who excels at building resilient, high-concurrency systems and wants to lead the digitalization of global financial markets. The Technical Stack You will be working within a modern, engineering-first culture. The core stack includes: The Engine: Expert-level C# and .NET ...

Senior Software Engineer (Full-Stack) 📍 Location: City-based (Hybrid/On-site options available) Role Summary We are seeking a highly experienced Senior Software Engineer to drive innovation and technical excellence across the full software development lifecycle. This is a key leadership role … where you will shape architecture, mentor engineers, and deliver scalable, high-quality software solutions. You’ll work across a modern tech stack, leveraging your expertise in full-stack development, cloud platforms, and distributed systems. Beyond hands-on development, you will play a critical role in guiding best practices, influencing ...

Senior Software Engineer London – Hybrid We’re working with a growing, international technology business at a pivotal stage of its scale-up journey. With a high-performing team of around 40 people and ambitious growth plans, the company is now seeking a Senior Software Engineer … systems and support the next phase of scale. Reporting into the VP of Engineering, this role is focused on building reliable, scalable software and supporting the systems that underpin the company’s platform. While not a people management position, it carries significant influence across engineering and plays a central ...

Senior Software Engineer | Python/Rust/Java/Golang | AI Systems | London | £120k to £160k + Equity Location: London (hybrid) Salary: £120k to £160k + meaningful equity We're working with a well funded Series A startup building a platform that captures operational knowledge and turns … thoughtful system design, and building things that continue to work as they evolve. If you enjoy solving difficult systems problems and want to build software that actually holds up in the real world, this is a rare opportunity to do that in a team that cares about doing things ...

Senior Software Engineer | £70k–£95k | Python • FastAPI • AWS • EKS 🚀 Looking for a product-led engineering role in a recently profitable, high-growth scale-up? This isn't just about maintenance; it’s about building high-scale, cloud-native microservices and tackling a massive upcoming greenfield build. … passion for clean code and architectural best practices. Interested in joining a profitable scale-up with a top-tier engineering pedigree? Let’s chat. 📩 Senior Software Engineer | £70k–£95k | Python • FastAPI ...

Senior Software Engineer - React/Node/Nest Developer - Remote - Shares scheme We're looking for a Senior Software Engineer to join a leading financial services organisation, where you will lead within a cross-functional squad, helping to build scalable, secure, and high-quality ...

Title : Senior Software Engineer (Compilers) Company : HPC & AI Location : London (primarily remote) Compensation : Up to £190,000 Company : An advanced HPC R&D firm, looking to expand the UK compiler team. Most of the team are ex-Big-Tech, ex-FAANG or ex-Chip firms. They joined … technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring. Role : Senior Software Engineer position with an emphasis on AI Compiler development. You will be a significant hire and will own much ...

Title : Senior Software Engineer (GPU Drivers) Company : AI Acceleration Location : London (very flexible WFH) Pay : Up to £160,000 + bonus and benefits Company : An advanced HPC R&D firm, looking to expand their GPU Driver team. Most of the team are ex-Big-Tech, ex-FAANG … technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring. Role : Senior Software Engineer position. You will be a significant hire spearheading much of their 2025 development. Much of the team will be built ...

Senior OR Mid Software Engineer - London (Hybrid/2days onsite) - Up to £95K + Bonus TogetherWeTech is hiring a Backend Engineer for their progressive Computer Vision (AI) client that focuses on end-to-end security solutions. As a Backend Engineer, it's a great opportunity … Insurance Dental Insurance Stock options Personal development training budget Key Requirements & Responsibilities: Collaborate with cross-functional teams to design, develop, and implement high-quality software solutions. Their environment is Golang (Must have experience) Lead the architecture and design of complex systems, ensuring scalability, reliability, and performance. Strong expertise ...

Senior Engineer (Ruby on Rails) 📍 Hybrid (London) 🌍 B2B SaaS | Series A | Tech for Good 💵 £90k - £110k + benefits 🚀 Series A business scaling across multiple regions 🎯 Platform already supporting millions of real-world interactions Albany Growth are partnered with a high growth Tech for Good business who are building … real time coordination across large networks handling millions of user requests and directly impacting accessibility and safety for people. They’re now hiring a Senior Engineer to take ownership of key backend systems, focusing on stability, reliability and production performance as the platform continues to scale. What ...

Arcus Search have partnered with a leading Financial Services organisation in London who are looking for a Senior Software Engineer to join the team. More details are below: Role: Senior Software Engineer Location: Central London - 3 days a week in the office Salary ...

Senior Software Engineer – Build, Lead, and Scale Impactful Systems Tech Stack - Python, AWS, SQL, Terraform We’re partnering with an exciting, fast-growing technology business that’s tackling complex, real-world challenges with cutting-edge engineering. They’re now looking for a Senior Engineer ...