1 to 25 of 30 Performance Engineering Jobs in London

energy security, boasting sub-50ms P95 and intra-system transit times with a P99 of under 6 milliseconds. Its core is deeply rooted in performance engineering: every thread, every byte allocated, and every shred of memory not garbage collected on time is accounted for. This unique programming experience … cost and performance. Requirements Extensive Experience & Technical Mastery: 10+ years of professional software development experience, with a strong focus on architecting, optimizing, and delivering performance-critical systems. Deep expertise in Java, Scala and the JDK, leveraging the Java ecosystem for high-performance applications. Proficiency in Rust is a … bonus. Experience with NixOS is considered a huge plus. Performance Engineering Excellence: Proven ability to diagnose, profile, and optimize complex systems using advanced performance analysis tools and methodologies. Demonstrated experience in tuning multi-threaded and parallel computing environments, managing concurrency, and applying lock-free designs for efficient More ❯

Engineering at hyperexponential At hyperexponential (hx) we are transforming the traditional insurance industry with our groundbreaking SaaS platform, hx Renew. Insurers use it to build complex mathematical models that enable smarter, faster pricing decisions-whether it's calculating the cost to insure a global superstar's concert tour or … earned the trust of industry giants like Aviva and Top 5 US insurers, as well as cutting-edge innovators like Convex and Inigo. Our engineering team-made up of some of the brightest (and kindest!) minds in the industry-pushes technological boundaries every day through creative innovation and regular … a doubt. Your Mission As a Principal Engineer, you will play a pivotal role in shaping the technical direction and delivery excellence of our engineering organisation. You will partner with senior leadership, including the VP of Engineering and Engineering Directors, to define and execute a multi-year More ❯

Seed-funded, rapidly scaling fintech company to help them find a Head of Engineering. This person will play a crucial role in shaping the engineering culture and infrastructure of the company, as well as building and maintaining a high-performing engineering team. Our client is is redefining rewards … a product that moves fast, iterates faster, and scales efficiently. They're an early stage fintech startup on a mission to become a unicorn. Engineering is at the heart of everything they do. This promising young tech company has raised £3m in seed funding from top European and North … culture and require a 4 days-per-week presence in the office in Hoxton. Job Description: Build, lead, and actively contribute to a high-performance engineering function that rapidly delivers high-quality code. As an early-stage startup, you’ll play a critical role in shaping their engineering More ❯

Seed-funded, rapidly scaling fintech company to help them find a Head of Engineering. This person will play a crucial role in shaping the engineering culture and infrastructure of the company, as well as building and maintaining a high-performing engineering team. Our client is is redefining rewards … a product that moves fast, iterates faster, and scales efficiently. They're an early stage fintech startup on a mission to become a unicorn. Engineering is at the heart of everything they do. This promising young tech company has raised £3m in seed funding from top European and North … culture and require a 4 days-per-week presence in the office in Hoxton. Job Description: Build, lead, and actively contribute to a high-performance engineering function that rapidly delivers high-quality code. As an early-stage startup, you’ll play a critical role in shaping their engineering More ❯

product that moves fast, iterates faster, and scales efficiently. We're an early-stage fintech startup on a mission to become a unicorn, and engineering is at the heart of everything we do. Our values represent the things we find important: We don't just work at Shuffle-we … giving you flexibility while maintaining the collaboration that drives our success. The Tech Stack Job Description: Build, lead, and actively contribute to a high-performance engineering function that rapidly delivers high-quality code. As an early-stage startup, you'll play a critical role in shaping our engineering … in our build-test-learn cycle-crucial for our early-stage growth and future success. Responsibilities - What you'll be doing Maintain a high performance engineering team - Foster a culture of ownership, autonomy, and continuous learning to enable A+ engineers to succeed at Shuffle. Increase Shipping Speed Without More ❯

do Our core set of client-centric solutions are designed to smash client's problems and make tech work harder for them. They include: Performance engineering Cloud adoption, migration and optimisation Data, ML and AI enablement We tie this all together with a little thing we call 'delivery … excellence', backed up with performance engineering, DevOps, and design thinking. What to expect You'll be a member of the Daemon Data & AI/ML team, pushing to win work on exciting, challenging and rewarding projects with some famous brands. Working hand-in-glove with high-performing teammates … on implementation for Data, ML & AI projects Define work packages and plan for success Communication of complex technical problems in simple terms Lead Data Engineering/ML team to deliver the engagements to clients You'll report to our Head of Data & ML/AI Engineering. Your experience Experience More ❯

The Product We have a genuine ambition to become engineering first, building and operating an elite digital platform. We are looking for people to join our community of engineers to support this transformation, build a modern digital ecosystem. Scope: You will be championing Engineering excellence in a key … for: Optimising the M&S on-line Web Experience across all device types, as well as SEO Leading teams in delivering best-in-class engineering solutions Seeing opportunities to improve the efficiency of the team through technology and ways of working, and working with teams to make these a … Championing an experimentation lead culture, driving experimentation across all teams. Leading maturity to Elite Dora for all products in the Browse & Select area Leading Engineering Excellence and creating culture of innovation. Making use of Platforms in order to maximise the value delivered by teams Key Accountabilities & Responsibilities The Principal More ❯

looking to take on a senior hands-on role while mentoring the next generation of top talent? Do you want to work on high-performance, real-time systems that process millions of transactions in milliseconds? This is your opportunity to join a leading payments technology consultancy, working with some … contributing to architecture and design, while also mentoring and guiding other engineers to raise the technical bar across the team. Design and develop high-performance, scalable applications for real-time payments. Lead technical discussions and drive best practices in TDD & BDD methodologies. Optimise applications for high availability, resilience, and … scalability. Mentor and support mid-level and junior engineers, fostering a collaborative engineering culture. Work in a highly agile Kanban/Scrum environment, contributing to continuous improvement. What We’re Looking For: Expert-level experience in Java 11+ (ideally Java 17) and Reactive Programming (Spring WebFlux, AKKA). Strong More ❯

looking to take on a senior hands-on role while mentoring the next generation of top talent? Do you want to work on high-performance, real-time systems that process millions of transactions in milliseconds? This is your opportunity to join a leading payments technology consultancy, working with some … contributing to architecture and design, while also mentoring and guiding other engineers to raise the technical bar across the team. Design and develop high-performance, scalable applications for real-time payments. Lead technical discussions and drive best practices in TDD & BDD methodologies. Optimise applications for high availability, resilience, and … scalability. Mentor and support mid-level and junior engineers, fostering a collaborative engineering culture. Work in a highly agile Kanban/Scrum environment, contributing to continuous improvement. What We’re Looking For: Expert-level experience in Java 11+ (ideally Java 17) and Reactive Programming (Spring WebFlux, AKKA). Strong More ❯

and democratising EV ownership. What You'll Do Coordinate a Single-Track Roadmap : Serve as the primary point of contact between the UX team, engineering, product management, and other stakeholders, aligning everyone to one overarching roadmap. Plan & Track with Jira : Use Atlassian Jira as the central project management tool … VPPs and energy retailers. Built to allow rebalancing the grid and sustain EV adoption at mass scale, UltraGrid aims to be a masterpiece of performance engineering, deeply focused on performance and cost, while streaming 100,000 telemetries daily from each connected household. What We're Looking For … Experience at the Highest Level of Professional Software Development : While this is not a coding role, you should be able to collaborate closely with engineering teams and navigate complex development projects. Startup Background : Previous experience in a startup environment is highly valued; you should be comfortable operating with less More ❯

Team Lead - FinTech - London Our client is one of the world’s leading FinTech companies and are building out their DevOps and Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive engineering forwards. … The role will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a … senior leader in the team you’ll be able to define and drive technology strategies. Requirements: - Strong technical experience of Site Reliability/DevOps engineering - Experience of leading a technical team - Good experience of Java and/or Python development and scripting - Experience of tools such as Kubernetes, Terraform More ❯

Team Lead - FinTech - London Our client is one of the world’s leading FinTech companies and are building out their DevOps and Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive engineering forwards. … The role will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a … senior leader in the team you’ll be able to define and drive technology strategies. Requirements: - Strong technical experience of Site Reliability/DevOps engineering - Experience of leading a technical team - Good experience of Java and/or Python development and scripting - Experience of tools such as Kubernetes, Terraform More ❯

DataNexus Builder Tools The Amazon DataNexus Builder Tools team is looking for an experienced engineer who is passionate in solutions focused towards optimizing for performance in distributed systems. DataNexus is a foundational platform that is core to Amazon's eCommerce business. Amazon customers using Kindle, Prime, Instant Video, Fulfillment … platforms for complex, distributed compute platforms. Key job responsibilities A Software Development Engineer at DataNexus Builder Tools builds tools that identify, diagnose, and optimize performance bottlenecks in complex distributed systems. You will develop solutions that analyze performance issues, starting with application logs and diving into source code, profiling … experiments, benchmarks, and profiling analyses, you will isolate bottlenecks and validate optimizations. Success in this role requires strong judgment to prioritize the most impactful performance improvements, along with the ability to clearly present findings and recommendations to development teams. You should be comfortable reading, modifying, and optimizing Java code More ❯

Lead SRE - FinTech - £125K Our client is one of the world’s leading FinTech companies and are building out their Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive engineering forwards. The role … will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a huge variety … drive technology strategies - You’ll have the chance to make the team your own! Requirements: Very strong technical experience of Site Reliability/DevOps Engineering Good experience of Java and/or Python development and scripting Very good experience of containers, monitoring, automation, Cloud and Linux Good knowledge of More ❯

Lead SRE - FinTech - £125K Our client is one of the world’s leading FinTech companies and are building out their Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive engineering forwards. The role … will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a huge variety … drive technology strategies - You’ll have the chance to make the team your own! Requirements: Very strong technical experience of Site Reliability/DevOps Engineering Good experience of Java and/or Python development and scripting Very good experience of containers, monitoring, automation, Cloud and Linux Good knowledge of More ❯

SRE Lead - FinTech - £120K+ Our client is one of the world’s leading FinTechs and are building out their Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive platform engineering forwards. The role … will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a huge variety … drive technology strategies - You’ll have the chance to make the team your own! Requirements: Very strong technical experience of Site Reliability/DevOps Engineering Good experience of Java and/or Python development and scripting Very good experience of containers, monitoring, automation, Cloud and Linux Good knowledge of More ❯

SRE Lead - FinTech - £120K+ Our client is one of the world’s leading FinTechs and are building out their Site Reliability Engineering (SRE) team in the UK. They’re looking to hire an experienced SRE to lead the team, grow it and drive platform engineering forwards. The role … will still be very “hands on” with a focus on the improvement, automation and engineering of their trading platforms – a cutting edge, low latency and very high availability infrastructure. You’ll take real ownership of release pipelines, performance engineering and work how you want a huge variety … drive technology strategies - You’ll have the chance to make the team your own! Requirements: Very strong technical experience of Site Reliability/DevOps Engineering Good experience of Java and/or Python development and scripting Very good experience of containers, monitoring, automation, Cloud and Linux Good knowledge of More ❯

there. Currently, we have a small team in London (Feature Store) and are bootstrapping a new multi-disciplinary team with expertise in Distributed Systems, Performance Engineering, and domain-specific knowledge (ML Systems, MLEs) to work on a high-visibility project: building a heterogeneous workload optimization engine on top … AI Infra presence in London, we plan to move additional project work there. Responsibilities Build, manage, and support diverse teams of software engineers and engineering managers. Handle dependencies, partnerships, and customer relationships effectively. Provide technical and organizational leadership. Form cross-functional and cross-discipline partnerships to drive engineering … inclusion, and innovation. Minimum Qualifications Experience building and supporting large-scale distributed systems. Significant industry technical experience. Experience recruiting, structuring, leading technical organizations, including performance management. Preferred Qualifications Familiarity with Machine Learning. Experience with HPC. Experience building AI infrastructure systems at scale. Meta builds technologies that help people connect More ❯

minds. You will have a huge impact on shaping the platform and guiding important design decisions. We unify the domains of deterministic computation and performance to build a proof-generating virtual machine which runs common RISC-V Linux programs. This tool allows us to verify what is being run … ensure that it is being run according to our set of semantics regardless of where it is run. Our day-to-day activities include performance engineering, thinking about commitment and proof schemes, systems programming, building SDKs for other developers, and many other interesting topics. What you'll need … Strong hands-on experience in software engineering Experience with modern idiomatic Rust or a strong desire to learn it Strong Computer Science fundamentals (e.g. algorithms, data structures and concurrency) Familiarity with instruction sets in various contexts Being comfortable or having worked on/with language runtimes, compilers or interpreters More ❯

Between these products, there’s a huge amount of exciting and important work to do, and we need more folks to join our talented engineering team. We’ve already seen incredible growth from our MagicNotes product - that is helping case workers save over 8 hours a week of admin. … these critical features Who we’re looking for Wants to move into management or has management experience and is keen to build a high-performance engineering culture We are happy to consider people without explicit management experience Breadth of experience across infrastructure, backend and frontend technology stacks We … test with one of Beams senior engineers 1 hour product and cultural interview with one of Beams product managers and a member of the engineering/design team More ❯

Between these products, there’s a huge amount of exciting and important work to do, and we need more folks to join our talented engineering team. We’ve already seen incredible growth from our MagicNotes product - that is helping case workers save over 8 hours a week of admin. … these critical features Who we’re looking for Wants to move into management or has management experience and is keen to build a high-performance engineering culture We are happy to consider people without explicit management experience Breadth of experience across infrastructure, backend and frontend technology stacks We … test with one of Beams senior engineers 1 hour product and cultural interview with one of Beams product managers and a member of the engineering/design team More ❯

testing tools, and building quality-driven cultures. Build and evolve the QA offering : Ensure alignment with market trends (e.g., AI in testing, data masking, performance engineering, etc.). Collaborate with internal teams : Work closely with competencies such as Cloud, AI, DevOps, and Data to deliver integrated solutions. Lead … thought leadership initiatives: Shape Sollers' perspective on quality engineering by contributing to white papers, events, and partnerships. Support agile delivery : Engage with agile project teams, support QA maturity in ongoing implementations, and ensure client satisfaction. Be part of an advisory team on an IT project for financial institutions. Coach … and mentor : Act as a QA Guru, build QA talent internally, support knowledge sharing, and foster a high-performance QA community. Collaborate externally: Work with external third parties to assess partnerships and licensing opportunities. About the requirements. You need: Proven track record in QA leadership and consulting in an More ❯

other bright minds. You will have a huge impact on shaping the platform and guiding important design decisions. Our day-to-day activities include performance engineering, thinking about commitment and proof schemes, systems programming, building SDKs for other developers, and many other interesting topics. What you'll need … Strong hands-on experience in software engineering Experience with modern idiomatic Rust or a strong desire to learn it Strong Computer Science fundamentals (e.g. algorithms, data structures and concurrency) Familiarity with instruction sets in various contexts Being comfortable or having worked on/with language runtimes, compilers or interpreters … Experience in systems programming or embedded systems or performance-critical software Be able to think through large engineering problems and break them down into digestible problems Communicate clearly in deep technical contexts verbally but also in writing and using whiteboards What you can expect from us Generous LTIP More ❯

70k - £95k + 20% Bonus Location: London (hybrid 1-2 days a week) Are you a Software Engineer passionate about building cutting-edge, high-performance systems? Do you thrive in an agile, fast-paced environment where innovation and collaboration drive success? If so, this is your chance to be … want to hear from you! In return, you’ll receive: £70k - £95k salary (depending on experience) 20% Bonus – based on both company and personal performance Work with cutting-edge technology in a highly agile environment Make an impact in global financial institutions Flexible remote/hybrid working options Ready … work on mission-critical financial systems that redefine how the world moves money. If you’re a self-starter who thrives in a high-performance engineering team, we want to hear from you! Apply now and be part of the next generation of payments innovation. More ❯

70k - £95k + 20% Bonus Location: London (hybrid 1-2 days a week) Are you a Software Engineer passionate about building cutting-edge, high-performance systems? Do you thrive in an agile, fast-paced environment where innovation and collaboration drive success? If so, this is your chance to be … want to hear from you! In return, you’ll receive: £70k - £95k salary (depending on experience) 20% Bonus – based on both company and personal performance Work with cutting-edge technology in a highly agile environment Make an impact in global financial institutions Flexible remote/hybrid working options Ready … work on mission-critical financial systems that redefine how the world moves money. If you’re a self-starter who thrives in a high-performance engineering team, we want to hear from you! Apply now and be part of the next generation of payments innovation. More ❯