Senior Software Engineer - Experimentation Platform

Teamwork Makes the Stream Work. Roku is Revolutionizing Television ViewingAs the leading TV streaming platform in the U.S., Canada, and Mexico, Roku is on a mission to enhance how audiences engage with their favorite content. We were the pioneers of streaming to the TV and aim to connect every television across the globe. Our platform links consumers with beloved content, empowers content publishers to grow and monetize their audiences, and provides advertisers with unique tools to connect with viewers.From your very first day at Roku, you'll make meaningful contributions in a fast-paced environment where everyone plays an active role. You will have the chance to impact millions of TV streamers globally while gaining valuable experience across various fields. About Our TeamOur mission is to develop state-of-the-art technology that drives experimentation and supports data-driven decision-making at Roku. Our team delivers comprehensive solutions, including user-friendly management interfaces, a powerful and scalable backend, and a sophisticated framework for data insights.We are a globally distributed team with a presence in both the U.S. and Europe, valuing technical expertise, creativity, collaboration, and a strong sense of ownership. Role Overview At Roku, we are enhancing a large-scale experimentation platform that underpins data-driven decision-making throughout the organization. Our system manages over 5,000 experiments annually, supports 100+ million devices, and executes over 100,000 operations per second while ensuring high reliability and low latency.In this position, you will play a crucial role in shaping the next iteration of our distributed backend. Your responsibilities will include designing and implementing new platform features such as bias avoidance mechanisms, advanced segment management, and experiment orchestration tools that guarantee trustworthy results at scale. Simultaneously, you will focus on enhancing the system's resilience, performance, and scalability, while addressing the challenges of high throughput and global reach. You will collaborate closely with engineers, data scientists, and product partners to translate experimental insights into actionable improvements.

bet365 is looking for a Senior Software Developer to join the Developer Platform team in Manchester. This role centers on designing and building new software solutions that support and improve the internal development platform. Role overview As a senior member of the team, you will lead technical efforts and collaborate with colleagues from different disciplines. The work involves tackling complex projects that aim to advance the platform's capabilities and reliability. What you will do Design and implement software features and enhancements for the development platform Work closely with cross-functional teams to deliver solutions that meet business and technical needs Drive process improvements and optimize development workflows Mentor and support junior developers within the team Impact Your work will help shape the future direction of the platform, supporting both developer productivity and the overall user experience.

mark43 is seeking a highly skilled Senior Software Engineer to join our dynamic team. In this role, you will be responsible for developing innovative software solutions that enhance public safety and improve operational efficiency for law enforcement agencies. You will work closely with cross-functional teams to design, build, and maintain robust applications while mentoring junior developers.

Senior DevOps/Platform Engineer (GCP) Location: Manchester (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent Join Us in Revolutionizing Cloud Engineering for Financial Services Your Role As a Senior DevOps Engineer at Capco, you will play a pivotal role in designing and implementing scalable, automated, and secure cloud platforms that drive the future of financial services. Collaborating within dynamic, cross-functional agile teams, you will champion the adoption of cutting-edge DevOps practices and continuous delivery frameworks, empowering our clients to transform their technological ecosystems. This position offers the chance to engage in both greenfield initiatives and enterprise-scale projects, encompassing cloud-native, hybrid, and on-premise environments. It’s an opportunity to elevate your skills, earn certifications, and create a significant impact in a collaborative and inclusive setting where your contributions are valued. Your Responsibilities Architect and deploy cloud-based infrastructure and CI/CD pipelines for both internal and cloud platforms. Enhance developer productivity by promoting self-service platform engineering. Automate and refine deployment processes through infrastructure-as-code methodologies. Collaborate with engineering and product teams to bolster performance, reliability, and security. Foster continuous improvement through innovative practices and experimentation. Mentor junior engineers while actively contributing to Capco’s expanding DevOps community. What We Are Seeking Demonstrated experience in platform engineering best practices. Experience in enhancing developer productivity and platform engineering in large-scale data environments. Proficiency with public cloud services, preferably GCP. Strong expertise in containerization (Docker) and orchestration tools like Kubernetes. Skilled in Infrastructure as Code (Terraform, CloudFormation). Experience in scripting languages (Python, Groovy) to maintain CI/CD pipelines using Jenkins, CircleCI, or GoCD. Robust knowledge of monitoring, automation, and configuration management tools (Ansible, Chef, Puppet, Helm). Preferred Qualifications Background in financial services or consulting projects. Hands-on experience with test orchestration tools (Cucumber, Karate, Selenium). Familiarity with Kubernetes ecosystems.

Role Overview Roku is hiring a Senior Software Engineer to work on the subscriptions platform in Manchester, United Kingdom. This role centers on building and improving subscription services that reach millions of users. The work supports a smooth, reliable experience for customers who use Roku’s streaming products. What You Will Do Design and implement scalable software solutions for the subscriptions platform Work with teams across engineering, product, and design to deliver new features and improvements Contribute to the architecture and reliability of services that support customer subscriptions Collaboration This position involves close collaboration with cross-functional partners. Projects often require input from multiple disciplines to ensure the final product meets Roku’s standards for customer engagement and satisfaction.

interactive investor is a flat-fee investment platform in the UK, supporting customers as they manage their financial futures. With nearly 30 years in the sector, the company manages close to £75 billion for over 450,000 customers and offers access to a wide range of UK and international investment options. The platform is also recognized for impartial financial journalism and an active investor community. Role overview The Lead Principal Software Engineer guides technical direction across several delivery teams. This position shapes discovery, design, planning, and architecture, acting as a subject matter expert in key technical areas. The role reports to the Senior Manager and works closely with teams across the business to develop and transition technical solutions into live environments. Supporting the Technical Engineering Manager, the Lead Principal Software Engineer oversees changes within defined parts of the technical landscape and ensures solutions move smoothly from delivery to production. Key responsibilities Work with engineering teams to align solutions with strategic technology goals. Facilitate smooth knowledge transfer and technical solution handover across all team levels. Contribute to the discovery, architecture, and design of complex new solutions and patterns. Lead changes that introduce new architectural designs or significantly update existing systems. Support architectural and solution design decisions in line with the overall technology strategy. Encourage technical development and innovation within the team through design and research initiatives. Build team capability by sharing knowledge and mentoring others. Location and compensation Location: Hybrid arrangement, with three days per week based in Manchester. Salary: Starting from £75,000.

Join Roku as a Senior Software Engineer specializing in Infrastructure and Efficiency. In this role, you will be instrumental in enhancing our platforms, ensuring optimized performance, and driving innovative solutions. Collaborate with cross-functional teams to design and implement scalable systems that support our growing user base.

Join our dynamic team at Mark43 as a Senior Software Engineer specializing in Integrations. In this pivotal role, you will be responsible for developing seamless integration solutions that enhance our software capabilities and improve user experience. Collaborate with cross-functional teams to design, implement, and optimize APIs and integrations, ensuring they meet the high standards of performance and reliability.

Join Engine by Starling, where we are dedicated to partnering with ambitious banks globally to cultivate rapidly growing businesses powered by our innovative technology.As a subsidiary of Starling Bank, Engine operates as a software-as-a-service (SaaS) business that originated to support Starling's operations. Having established ourselves as an independent entity two years ago, we continue to thrive.Starling has enjoyed remarkable growth, primarily due to our commitment to developing modern technology from the ground up. Our SaaS platform is now accessible to banks and financial institutions worldwide, allowing them to leverage the cutting-edge digital features and streamlined back-office operations that have contributed to Starling's success.At Engine, we believe in the power of teamwork to achieve outstanding results for our clients. We are an engineering-centric organization seeking passionate individuals who are excited about the potential of our technology to transform banking across diverse global markets. Our mission is grounded in five core values: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.Hybrid Working ModelWe embrace a hybrid working model, with a preference for candidates located within a commutable distance from our offices to facilitate in-person collaboration and interaction.About Engineering at Engine by Starling - https://www.enginebystarling.com/We are actively seeking Backend Software Engineers to enhance the Engine Platform, optimizing our existing features for banks globally while also developing new features not yet available in the UK market.Engine by Starling engineers are enthusiastic about delivering new features, irrespective of their primary technology stack. Discover more about our team through various case studies and our collaboration with Women In Tech.

Founded in 2017, Obsidian Security was established to address a crucial need: securing the SaaS applications integral to modern business operations, such as Microsoft 365, Salesforce, and many more. Supported by leading investors like Greylock, Norwest Venture Partners, and IVP, we have developed a comprehensive SaaS security platform designed to mitigate risks, detect and respond to threats, and prevent breaches at their source. Our team comprises industry leaders who played pivotal roles in shaping endpoint and identity security at companies such as CrowdStrike, Okta, Cylance, and Carbon Black. Currently, we are revolutionizing SaaS security in the age of agentic AI. Today, Obsidian enjoys the trust of global enterprises including Snowflake, T-Mobile, and Pure Storage, safeguarding more than 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand, including numerous Fortune 1000 and Global 2000 companies. With robust global momentum, an expanding partner ecosystem including SentinelOne, Databricks, and Google Cloud, and a major fundraising initiative on the horizon, we are rapidly scaling towards sustainable growth and readiness for an IPO. Join us in defining the future of SaaS security!

About Roku Roku is a leading TV streaming platform in the U.S., Canada, and Mexico. The company aims to power every television worldwide by connecting viewers with their favorite content, supporting publishers in building and monetizing audiences, and offering advertisers new ways to reach consumers. Employees at Roku contribute from day one. The company values each team member’s impact and offers the chance to reach millions of TV streamers while developing skills across multiple areas. Role Overview: Senior Software Engineer - Software Development Kit This Manchester-based role focuses on the core of Roku’s software development kit (SDK). The Senior Software Engineer will architect, design, implement, and test both the run-time and native renderer of the SDK. Collaboration with engineers working on higher-level scripting components is a key part of the job. The SDK must run efficiently on a wide range of devices, including those with very limited system resources such as RAM, Flash, and CPU. Designing for performance and compatibility across both legacy and new technology is central to this position. Main Responsibilities Architect, design, implement, and test the run-time and native renderer of Roku's software development kit. Location Manchester, United Kingdom

Role overview Roku, Inc. is looking for a Senior Software Engineer to focus on Ad Auctions in Manchester, United Kingdom. This position plays a key part in building and improving Roku’s advertising auction systems. The work directly influences how efficiently ads are delivered and supports the company’s revenue goals. Main responsibilities Design, develop, and refine auction systems that drive advertising on Roku’s platforms. Collaborate with cross-functional teams to create solutions that balance business needs with a strong user experience. Contribute to projects that improve how ads are managed and delivered across Roku’s streaming products. Location This role is based in Manchester, United Kingdom.

About UsKubaPay: Innovating Mobility PaymentsFounded in 2019, KubaPay is revolutionizing the mobility payments sector. Our cutting-edge mobility platform is designed for speed, simplicity, and cost-effectiveness, underpinned by a scalable, account-based ticketing engine. Transit agencies worldwide utilize our cloud-based solution to implement seamless contactless payments and Mobility-as-a-Service.With our technology currently in operation across over 500 cities globally, KubaPay is rapidly expanding and is proudly a member of the ICM Mobility Group, which is committed to advancing innovative digital payment solutions.Your OpportunityWe are excited to invite a skilled Head of Platform Engineering to join our dynamic team in Manchester, a hub of engineering excellence. In this pivotal role, you will lead our platform engineering and technical support teams (level 2 and level 3 support).This strategic position entails overseeing the development and maintenance of our cloud infrastructure, while ensuring exceptional support for our clientele. You will be instrumental in enhancing public transportation experiences through innovative technology solutions, shaping the trajectory of our SaaS platform.Your leadership will be key in promoting best practices in platform engineering, automation, and the establishment of a coherent technical roadmap. You will nurture a collaborative work atmosphere and empower the L2/L3 support team to efficiently address complex customer inquiries. Collaborating with cross-functional and international teams, you will deliver outstanding services and solutions with minimal downtime.Managing a small team of three experienced platform engineers, you will report to the Head of Country for KubaPay in Denmark, engaging directly with internal and external stakeholders on technical matters.We encourage you to apply even if you don’t meet every single requirement. We appreciate varied experiences and welcome candidates who demonstrate potential and a desire to learn.

Are you ready to redefine the future of data integration?At Matillion, we are pioneers in intelligent data integration solutions, revolutionizing the way businesses harness the power of their data.We are on a mission to transform data productivity globally, and we are looking for passionate, innovative thinkers who are motivated to make a significant impact.Our platform, the Data Productivity Cloud, is designed to enhance data productivity, and our latest innovation, Maia, features AI-powered virtual data engineers that enable teams to create, build, and manage data pipelines with unparalleled speed.Join #TeamGreen, where our mission drives us, collaboration propels us forward, and together we aim to make a substantial impact in the data industry.Position OverviewAs a Senior Staff Software Engineer within our Maia team, you will play a crucial role in our innovative endeavors: developing agentic AI systems, creating new tools and integrations, and staying abreast of the latest advancements in Generative AI. This role transcends traditional engineering; it is high-impact work where your contributions will significantly influence our products.You will lead architectural decisions, mentor fellow engineers, and contribute to strategic planning. Our environment is dynamic, where requirements shift rapidly and new challenges arise, making it essential to find someone who thrives in such a setting. If you are a Java expert with experience in Claude, Gemini, and agentic workflows, and you aspire to implement these technologies at scale within a world-class engineering team, this opportunity is for you.This position offers a hybrid work model based in our Manchester office. We believe in the power of collaboration and encourage a minimum of 2 days per week in the office to foster relationships and cultivate the culture that drives exceptional engineering.

Teamwork Makes the Stream Work! Join Roku: The Future of TV StreamingRoku is the leading TV streaming platform in the U.S., Canada, and Mexico, and we are on a mission to power every television globally. As pioneers in TV streaming, we connect viewers with the content they love, empower content creators to monetize their audiences, and offer advertisers innovative ways to engage.From day one at Roku, your contributions will be valued and impactful. We are a rapidly growing public company where every team member plays a critical role. You have the chance to delight millions of viewers worldwide while gaining experience across a diverse range of disciplines. About Our Dynamic TeamThis team focuses on developing customer-centric features that enhance the user experience, including content discovery, search functionality, Roku Pay, subscriptions, embedded software, and firmware. Our product roadmap accelerates growth and allows us to introduce exciting new features to tens of millions of Roku users globally.Our engineers are proactive problem solvers, driven by the desire to tackle challenges and deliver solutions. Collaboration across engineering, UI design, product management, and business leadership is key to our success. We encourage an independent spirit within a collaborative environment, making us pragmatic innovators in the streaming media landscape. Role OverviewAs a Senior Software Engineer at Roku, you will play an essential role in our ongoing innovation in the streaming industry. You will be responsible for developing crucial features for the Roku platform, particularly in embedded UI development and algorithm implementation to enhance user intuitiveness and underlying architecture. Collaborating closely with product management, you will help bring new features to life, shaping the future of television and streaming media around the world.

Role overview Shawbrook is hiring a Senior Software Engineer in Manchester. This role focuses on designing, building, and supporting software solutions that support the company’s growth. The position offers the chance to work with teams across the business to improve Shawbrook’s platforms and help deliver strong user experiences. What you will do Design, develop, and maintain software that meets business needs Work closely with colleagues from different teams to enhance Shawbrook’s technology platforms Contribute to delivering reliable and user-friendly solutions Location Manchester

Hamiltonian Dynamics is a rapidly expanding technology firm specializing in Defence and Cyber Security. We develop cutting-edge software solutions tailored for high-assurance environments. Our teams operate from various locations including Gloucestershire, Manchester, and London, as we enhance our platform capabilities and seek talented Platform Engineers to join our mission.Your RoleAs a Platform Engineer at Hamiltonian Dynamics, you will be instrumental in designing, building, and maintaining the platforms and infrastructure that support our secure software systems. You will collaborate closely with software engineers, architects, and key stakeholders to ensure reliable delivery, scalability, and operational excellence.We value diverse backgrounds and levels of experience; what matters most are strong engineering fundamentals, a curious mindset, and a willingness to learn.Key ResponsibilitiesDevelop and manage secure, automated infrastructure utilizing Infrastructure as Code (IaC)Enhance and operate containerized platforms and cloud environmentsSupport Continuous Integration/Continuous Deployment (CI/CD) pipelines and developer workflowsBoost observability, reliability, and operational resilienceWork collaboratively across teams to refine platform standards and toolsPreferred Skills & ExperienceWe seek candidates with experience in one or more of the following areas, along with a readiness to embrace new tools:Infrastructure as Code and automation (e.g., Terraform, Ansible)Containerization and orchestration (e.g., Docker, Kubernetes)Cloud platforms (e.g., AWS and/or Azure)CI/CD tools and modern delivery methodologiesLogging, monitoring, and tracing (e.g., Elastic Stack, Grafana, Jaeger)Familiarity with CNCF tools and cloud-native best practicesSecurity & Location RequirementsMust be a UK citizen with a minimum of 10 years UK residencyRequired to possess high-level UK security clearanceWillingness to travel to client sites in Gloucestershire, Manchester, or LondonBenefitsCompetitive salary range: £40,000-85,000 based on experience (we may consider candidates outside this range for the right fit)10% Clearance Bonus25 days of annual leave plus bank holidaysOption to buy or sell up to 5 days of leave per year8% employer pension contributionBUPA health insuranceLife insurance coverage of 4× salaryElectric Vehicle (EV) car scheme via salary sacrificeEmployee Management Incentive (EMI) share schemeFlexible working hours and arrangementsAnnual training budget of 10 daysWe prioritize individual training and career development plans, recognizing that every employee learns differently, and we actively support ongoing professional growth.

Join the dynamic Verification team at bet365 as a Senior Software Developer. We are seeking an experienced and dedicated professional to contribute to our ambitious ground-up re-architecture initiative.In this role, you will be instrumental in developing, enhancing, and supporting our vital Verification platform, which includes the implementation of state-of-the-art real-time facial recognition systems utilizing cutting-edge AI technology, alongside essential operational tools.As part of a full stack team, you will partake in the transition to modern technologies, including Golang, React, and Cloud platforms. Key technical skills sought in our team include Kafka, SQL, .Net, Golang, and Typescript.This pivotal position allows you to collaborate closely with our Technical Leads to design and implement robust verification systems while upholding the highest quality standards in a fast-paced, performance-driven environment.Your leadership as a Senior Software Developer will inspire a talented group of developers to innovate and excel in delivering reliable solutions while nurturing a collaborative and vibrant workplace culture.This role is eligible for our hybrid working from home policy, offering you a flexible work environment.

Join Our Vision for Public Transit.At Vix Technology, we are a pioneering force in delivering innovative solutions for public transportation, with a steadfast belief that accessibility should be a fundamental right. With over 35 years of industry experience and our systems making a difference in more than 200 cities across the globe, we adopt a modular approach to seamlessly integrate diverse partners and technologies, culminating in top-tier solutions. Our vibrant team of over 450 professionals, spread across 12 global offices in APAC, Europe, and North America, thrives in a flexible and collaborative environment that empowers our employees to connect, innovate, and excel.If you are enthusiastic about transforming public transit and excel in a collaborative team setting, we encourage you to apply and contribute to our ambition for a more interconnected world.Explore Your Future with Us!Vix Technology is on the lookout for a skilled and driven Senior Software Engineer to enhance our dynamic team. In this role, you will have the chance to engage with cutting-edge technologies and solutions that are revolutionizing the public transportation landscape.As a Senior Software Engineer, you will play a crucial role in propelling innovation and developing essential software solutions that support efficient public transportation systems. You will work closely with a diverse team of platform specialists to design and implement resilient and scalable software applications.Your Responsibilities:Design, develop, test, and maintain secure, scalable, and reusable software solutions tailored to customer needs.Participate actively in Agile development processes, including sprint planning and retrospectives.Collaborate with Business Analysts, Product Owners, and Solutions Architects to prioritize design tasks and manage delivery timelines.Mentor and guide junior engineers through knowledge sharing, code reviews, and technical coaching.Act as a technical escalation point to investigate and resolve production incidents, ensuring system reliability and customer satisfaction.Articulate technical concepts effectively across diverse teams and provide constructive, solution-focused feedback.

Role Overview Turnitin is hiring a Senior Software Engineer for a fully remote position based in the UK. This role supports Turnitin’s mission to strengthen educational integrity and help learners succeed through thoughtful software development. What You Will Do Design, build, and maintain reliable software applications that serve educators and students. Work with cross-functional teams to deliver features and improvements that keep products running smoothly and effectively. Focus on quality, usability, and performance throughout the development process. Team and Collaboration Join a group that values open communication and shared problem-solving. Engineers at Turnitin work closely with colleagues from different backgrounds to create solutions that support academic honesty and learning progress.