Senior Software Engineer (Hybrid)

Senior Software EngineerLocation: Waterloo, London, England, UK | Hybrid (1 day per week in office)About UsAt 8th Light, we breathe life into exceptional ideas. Established in 2006 and based in Chicago, we are at the forefront of technology solutions, partnering with organizations to tackle significant challenges and foster sustainable growth. Whether collab…

Join Our Team as a Principal Software EngineerLocation: Waterloo, London, England, UK | Hybrid (1 day per week in office)About 8th LightAt 8th Light, we breathe life into innovative ideas and transform them into reality. Established in 2006 and based in Chicago, we are a premier technology solutions provider that collaborates with organizations to tackle significant challenges and foster sustainable growth. From dynamic startups to large global enterprises, we specialize in enhancing our clients’ digital products through innovative product strategies, experiential design, AI solutions, and exceptional engineering expertise.Our dedication to quality enables us to deliver solutions that we take immense pride in, while our insatiable curiosity fuels innovation and breakthrough thinking. At 8th Light, we thrive in an environment that promotes continuous learning, empowering growth through mentorship and hands-on experience. We cultivate an open, collaborative culture rooted in honesty and trust, believing that true success is measured by the results we achieve for our clients.If our mission and culture resonate with you, we encourage you to apply!

Job Title: Senior Software Engineer I Location: London - Hybrid Salary: £60,000 - £80,000 Team: Flex Reporting to: Software Engineering Manager Note: Currently, we are unable to provide visa sponsorship for this position. We are dedicated to fostering a diverse, global team and evaluate our sponsorship policy on a role-by-role basis. Please monitor our careers site for future opportunities that may offer visa sponsorship. Kaluza is at the forefront of transforming energy complexities into seamless solutions through our Energy Intelligence Platform. We empower energy companies to navigate modern challenges while expediting the transition to a clean, electrified future. Utilizing cutting-edge Data, AI, and real-time decision-making, we convert energy intricacies into growth opportunities for our partners. By merging predictive algorithms with human-centered design, Kaluza ensures that clean energy is both reliable and affordable. Our teams span across Europe, North America, Asia, and Australia, and we maintain a joint venture with Mitsubishi Corporation in Japan. We collaborate with industry leaders such as OVO, AGL, and ENGIE, alongside innovators like Volvo and Volkswagen. Key Responsibilities: As a member of the Flex platform team, you will play a critical role in developing systems that connect energy retailers, grid operators, and consumers, fostering a more adaptable and dynamic energy infrastructure. Your daily tasks will involve designing and implementing scalable features, including integrating technologies like electric vehicles and facilitating customer offerings such as “Charge Anytime.” You will collaborate closely with data scientists and backend engineers on fundamental optimization challenges, taking ownership of features from conception through continuous enhancement. Throughout this process, you will produce high-quality, well-tested code and contribute to a robust engineering culture, developing software that significantly contributes to decarbonizing transport and home energy usage at scale. Qualifications: Proficiency in at least one programming language and experience contributing to diverse, complex systems. Strong understanding of contemporary engineering practices, encompassing continuous delivery, test automation, and agile methodologies. A fervor for collaborating within cross-functional teams to tackle challenging problems and build innovative features.

Location: London Start date: Immediate The Role: Join AlphaSights as a Senior Test Engineer within our dynamic Software Engineering Team. In our digital-first organization, ensuring continuous uptime, exceptional product quality, and outstanding user experiences is paramount. This role presents a unique opportunity to make an immediate impact on our engineering efforts. You will collaborate closely with Software Engineering and Product Management, spearheading the design and execution of automated testing solutions that scale across our platform, guaranteeing reliability and quality across frontend, backend, and APIs. We seek a proactive, innovative, and collaborative individual who is committed to continuous improvement and team success. This hands-on leadership role involves not just developing and maintaining automated tests but also guiding Test Engineering strategies, establishing technical standards, mentoring QA team members transitioning to Test Engineering, and defining best practices for testing, quality, and reliability. In this fast-paced environment, you will maintain a positive, solution-oriented mindset while delivering flawless user experiences through robust test automation. In addition to working with teams based in London and Portugal, you will have the chance to engage with teams across EMEA, the US, and Asia. What You’ll Do: Lead the design and development of automated test plans, suites, and frameworks across multiple projects to ensure comprehensive test coverage and high-quality releases. Mentor and guide junior QA engineers, enhancing their automation skills and cultivating a culture of quality and best practices. Maintain and scale test automation infrastructure to support CI/CD pipelines, cross-platform validation, and rapid feedback loops. Perform targeted manual testing, including exploratory testing, edge-case validation, and UI/UX verification when necessary. Collaborate closely with Engineering and Product teams to define test strategies, acceptance criteria, and testing priorities for complex features. Drive cross-team initiatives that enhance overall testing practices.

Join our innovative team at getscope as a Senior Software Engineer. In this pivotal role, you will design, develop, and implement cutting-edge software solutions that will drive our projects forward. Collaborate with cross-functional teams to translate business needs into technical requirements while ensuring high quality and performance of applications.

Join Runna as a Senior Software Engineer II, where you'll play a pivotal role in enhancing our software solutions. You will collaborate with cross-functional teams to design, develop, and implement robust applications that meet our customers' needs. Your expertise will help us push the boundaries of technology, ensuring our products remain at the forefront of the industry.

About the PositionWe are seeking a highly skilled and motivated Senior Software Engineer - Generalist to join our innovative team at Anza. This role is pivotal in enhancing our Agave client and the overarching Solana network, focusing on performance, reliability, and security.About UsAnza is a cutting-edge R&D lab focused on the Solana blockchain, dedicated to revolutionizing blockchain performance and scalability. With a team of seasoned executives and core engineers, we tackle the most pressing challenges in the Web3 space. We believe in the power of collaboration and transparency, building robust protocols that can support the crypto ecosystem's growth and security.Your ResponsibilitiesDevelop and optimize our technical infrastructure, particularly the Agave client within the Solana ecosystem.Design and implement testing frameworks to simulate adversarial attacks and proactively identify vulnerabilities.Analyze performance metrics to pinpoint and resolve bottlenecks.Collaborate with subject matter experts to understand and define performance requirements for code components.Benchmark new solutions to enhance system reliability and performance.Work alongside cross-functional teams to architect solutions focused on scalability, security, and optimal performance.Contribute to all stages of the software development lifecycle, ensuring seamless transitions through development, staging, and production.Document architecture and processes to promote standardization and knowledge sharing across teams.

Join a Revolutionary CompanyAt Palantir, we are redefining the landscape of software designed for data-driven decision-making and operational efficiency. Our innovative platforms enable partners to make significant advancements—from developing life-saving pharmaceutical solutions to predicting supply chain challenges and reuniting families with missing children.Position OverviewThe Substrate team at Palantir is at the forefront of our core production infrastructure, managing hundreds of Kubernetes (K8s) clusters across diverse environments including on-premises setups and leading cloud services. As a Senior Software Engineer within Substrate, you will spearhead the design and development of our managed Kubernetes offerings, ensuring they operate seamlessly across all scenarios.In this role, you and your team will lead the deployment and management of our K8s clusters, achieving complete automation with zero manual intervention through the creation of cutting-edge tooling and contributions to core Cloud Native Computing Foundation (CNCF) components. You will play a vital role in maintaining scalability, stability, and security across a varied landscape of compliance standards and hosting infrastructures. Our team culture is anchored in engineering excellence and operational rigor, prioritizing proactive issue resolution and significant investments in automation and self-healing technologies.If you are passionate about large-scale infrastructure and Kubernetes, this opportunity is tailored for you.

Join our innovative team at AECOM as a Senior Software Engineer, where you will play a critical role in designing and developing cutting-edge software solutions. You will collaborate with cross-functional teams to bring complex projects to fruition, ensuring high quality and performance standards are met.

About the Role Shawbrook Bank is looking for a Senior Software Engineer in London. This role focuses on building software that supports business growth and improves efficiency. Collaboration with other engineers and teams is central to the work. What You Will Do Develop and maintain high-quality software tailored to customer needs Work closely with colleagues to deliver solutions that support the bank’s goals Contribute technical expertise to projects and ongoing improvements

Join Multiverse as a Senior Software Engineer specializing in Platform Engineering. In this pivotal role, you will leverage your expertise to design, build, and enhance our platform, ensuring it meets the highest standards of performance and reliability. Collaborate with cross-functional teams to deliver robust solutions that drive the success of our innovative programs.

Join our dynamic team as a Senior Software Engineer at Faculty, where innovation meets technology. In this pivotal role, you will be responsible for designing, developing, and maintaining cutting-edge software solutions that drive our projects forward. We're looking for a passionate engineer who thrives in a collaborative environment and is eager to tackle complex challenges.Your expertise will guide our team in implementing best practices in software development, ensuring high-quality code and optimal performance. You will work closely with cross-functional teams to deliver impactful products that enhance our customers’ experiences.

Role overview Entain seeks a Senior Software Engineer based in London. The position centers on designing, building, and refining high-performance applications that drive key business objectives. Collaboration is a core part of this role, with regular interaction across multiple disciplines to deliver dependable software solutions. What you will do Develop and improve software applications, focusing on performance and scalability Work with cross-functional teams to bring features from initial idea through to deployment Offer technical insight that helps guide Entain’s technology strategy

Join our talented team to create the leading training platform for runners!At Runna, we empower everyday runners to excel by developing an exceptional app that offers world-class training, coaching, and a vibrant community for everyone—from improving 5k times to training for marathons.Our growth is remarkable! In November 2023, we secured a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. In 2024, we were honored to be one of three global finalists for the iPhone App of the Year by Apple, showcasing our innovation and impact. By 2025, we became part of Strava, further accelerating our journey!Our vision is ambitious: to be the premier global training platform for millions of runners worldwide. As we grow with intention, we seek individuals eager to contribute to something meaningful that leaves a lasting legacy. With the backing of Strava, now is an exciting time to be a part of our journey. The Team You'll JoinWe are in search of innovative, creative, and positive collaborators to become part of our skilled cross-functional engineering team. You will be part of the Train Team, collaborating closely with our modeling teams to integrate essential features aligned with Runna's mission, such as adapting plans for holidays and B races, supporting cutting-edge training plans, and enhancing in-app experiences using our AI/ML tools.You will partner with our CTO and engineering leadership to help shape the future of Runna, receiving unwavering support throughout this thrilling journey. Our roadmap is packed with opportunities to champion new technologies, tackle significant challenges affecting millions of runners, and enhance our existing architecture to elevate our engineering team.Your ResponsibilitiesDesigning, developing, testing, and delivering innovative features across the full stack.Collaborating with the Product team to determine the best solutions for optimal customer experiences.Working with modeling/AI engineers to design the architecture that interfaces between the Runna training engine and the Runna app.Providing technical support to team members as needed.Mentoring and coaching engineers in your team, offering guidance and code reviews while avoiding bottlenecks.

Role overview Based in London, the Senior Software Engineering Manager for Quality Engineering at Sony Interactive Entertainment Global leads a talented group of engineers. The position centers on defining and executing the strategy for software quality and performance across projects. Main responsibilities Shape the strategic direction for the quality engineering team Mentor and guide engineers, supporting their professional development Establish and maintain effective software testing practices Encourage ongoing improvement within the team Collaborate with cross-functional partners to ensure quality standards are met throughout the software development lifecycle Collaboration and impact This leadership role bridges engineering and quality, making sure software products meet rigorous standards from initial planning through release. Regular interaction with teams across Sony Interactive Entertainment Global helps to maintain and raise quality expectations company-wide.

Role overview The Senior Software Engineer I at Runna will play a key part in shaping how users interact with the company’s products. The work centers on designing, developing, and maintaining applications that support a strong user experience. Expect to take a hands-on approach, working closely with colleagues from different teams to deliver solutions that scale and perform reliably. Location This role is based at the Runna office in London.

Join Our Team as a Senior Software Engineer IIAt Runna, we are assembling a skilled team dedicated to creating the premier training platform for runners. Our innovative app empowers everyday runners to achieve their best, offering world-class training, coaching, and community support for everyone from 5k enthusiasts to marathon first-timers.We are experiencing rapid growth! In November 2023, we successfully completed a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. Our app was recognized as one of three global finalists for Apple's iPhone App of the Year in 2024, showcasing the groundbreaking impact of our work. In 2025, we proudly joined the Strava family!Our goal is ambitious: to be the leading training platform for millions of runners worldwide. With our recent acquisition by Strava amplifying our mission, now is an exciting time to become part of something truly meaningful. Your Future TeamWe seek talented, innovative, and collaborative individuals to join our cross-functional engineering team. You will be an integral member of our newly formed Strength Team, collaborating with our modeling engineers and Team Strava to revolutionize strength training for athletes.You will work closely with our CTO and engineering leadership to shape the future of Runna, receiving support throughout this exhilarating journey. With a dynamic roadmap filled with opportunities, you will champion new technologies, solve meaningful challenges for millions of athletes, and enhance our existing architecture to elevate our engineering efforts.Your ResponsibilitiesArchitect, develop, test, and deploy new features across the full technology stack.Collaborate with the Product team to identify optimal solutions for an exceptional user experience.Partner with modeling and AI engineers to design the architecture that connects the Runna training engine with the Runna app.Provide technical assistance and mentorship to team members as needed.Guide and support fellow engineers through mentorship and code reviews, ensuring smooth workflows without bottlenecks.Contribute to operational efficiency by building and maintaining our development infrastructure.

Join our dynamic team as a Senior Software Engineer specializing in Backend development. In this role, you will collaborate within our autonomous agile teams to craft the services that drive the Blacklane platform. Your contributions will enhance our back-office systems and address integration challenges for our business partners.Our Tech Environment: Our technology stack includes Ruby, Go, TypeScript, and Java, all structured using Domain-Driven Design (DDD). These services are deployed on Kubernetes and communicate via domain events using SQS and Kafka. We utilize a variety of data storage solutions including PostgreSQL, MySQL, Elasticsearch, Redis, and DynamoDB. Our cloud infrastructure is primarily based on AWS, with provisioning managed through Terraform.YOUR CHALLENGE:Address unique challenges to customize our products for specific markets.Maintain high standards through thorough test coverage, documentation, code reviews, and knowledge sharing.Dedicate time to optimizing performance, usability, and maintainability of the systems you oversee.Focus on personal development by acquiring new skills and technologies.Collaborate with a motivated, open-minded team committed to enhancing travel experiences for our guests.ABOUT YOU:You are proactive, curious, and a collaborative team player.You have at least 5 years of experience with two or more programming languages.You are proficient in at least one of the following languages: Ruby or Go.You possess knowledge of the HTTP protocol and have experience with REST APIs.You write high-quality, maintainable code and are familiar with the challenges of distributed systems.You are eager to learn more about event-driven architecture and domain-driven design.You have experience with Docker and containerized environments; knowledge of Kubernetes and Terraform is an advantage.

Role Overview Position: Senior Software Developer in Test Location: London, UK (Hybrid: roughly one day per week in the office) Contract Type: Permanent, full-time Compensation: £70,000 - £80,000 base salary, plus 10% bonus, 10% shares, and additional benefits About Appvia Appvia delivers cloud solutions and platform engineering to help organizations modernize software systems, boost developer productivity, and adopt cloud-native practices. The team focuses on modern application development, domain-driven design, and improving delivery outcomes through strong architecture, testing, and developer experience. Appvia works with clients in complex, high-impact settings where quality, reliability, and scalability matter. The goal: help organizations ship better software, faster. What You Will Do This is a hands-on, client-facing role within the Solutions Engineering team. The main focus is to advance a large-scale modernization and AI-driven transformation initiative. The Senior Software Developer in Test (React/Java) will: Lead the shift from slow, fragile end-to-end testing to scalable integration, functional, and contract testing methods Guide teams in adopting modern testing and quality engineering practices for complex systems Introduce new tools and approaches to improve developer feedback loops and embed quality early in the software delivery lifecycle Work with greenfield initiatives within brownfield environments Report to a Principal Software Engineer and act as a senior quality engineering advocate within delivery teams Interview Process Discovery conversation with Talent Acquisition Technical interview with the Engineering Team Final interview with Leadership Security Clearance Requirements Eligibility for UK Government Security Clearance (SC) is essential. Candidates must meet the following criteria: Hold a British Passport or Indefinite Leave to Remain (ILR) Have lived in the UK for the past five years No criminal record or financial irregularities

Senior Software EngineerBecome a key player in our mission to revolutionize the shopping and dining experience, where innovation, impact, and growth are at the forefront of everything we pursue. Our Engineering teams tackle intricate technical challenges across a global, three-sided marketplace, constructing and scaling systems that cater to millions of customers, riders, and partners daily.From real-time logistics to robust infrastructure and marketplace optimization, we design, build, and operate technology that fuels Deliveroo’s expansive growth.We seek a Senior Software Engineer to join our London (Hybrid - 3 days from the office) team. In this pivotal role, you will enhance code structure and architecture while leading project planning to maximize efficiency and reliability across our production systems.Familiarize yourself with our Engineering team — discover what motivates us, our work culture, and what you can anticipate.Your ResponsibilitiesHere’s what your day-to-day might encompass:Pursue Technical Excellence: Refine code structure and architecture within your team’s domain, conducting impactful code reviews to ensure quality and scalability.Steer Project Planning: Anticipate dependencies and risks, collaborating closely with Product and Design to ensure seamless delivery of complex features.Enhance Operations: Streamline the maintenance and operation of production systems, fostering visibility, health, and operational readiness.Collaborate & Influence: Cultivate relationships across engineering teams to uncover collaboration opportunities and influence the broader technical roadmap.Mentor & Recruit: Facilitate the personal development of your colleagues through technical mentorship and actively participate in engineering interviews to expand our team.Desired QualificationsOur ideal candidate will bring robust expertise in several of these areas and a willingness to grow in others:Solid Engineering Principles: A strong commitment to crafting readable, well-designed, and thoroughly tested software.Backend Proficiency: Extensive experience in developing web-based applications (we utilize Go, Ruby/Rails, Python, Scala, and Rust).Data Proficiency: Familiarity with data handling and optimization techniques.