Full Stack Web Engineer at ThreatAware | London

At Intercom, we are redefining customer service through innovative AI technology. Our mission is to empower businesses to deliver exceptional customer experiences.Our advanced AI agent, Fin, is at the forefront of customer service AI, enabling businesses to provide continuous, high-quality support. When paired with our Helpdesk, it evolves into the Intercom Customer Service Suite, offering enhanced AI support for complex queries that necessitate human intervention.Since our inception in 2011, we have gained the trust of nearly 30,000 businesses worldwide, setting new benchmarks in customer service. Our core values drive us to push boundaries, work with urgency, and create substantial value for our clients.What’s the opportunity?Our website is the heart of our brand—serving as the primary resource for information about Intercom’s products and the leading source of leads for our demand generation team. Intercom.com and Fin.ai are pivotal in bridging awareness, product marketing, demand generation, and customer support, necessitating a robust and reliable infrastructure alongside sleek user-facing interfaces.We are seeking a Senior Full Stack Engineer to join our Team Web. This role is perfect for someone who is eager to create engaging front-end experiences while also developing the backend systems and tools that support them. You will significantly influence the future of our website, engaging with product marketers, designers, and engineers throughout the organization.Explore the team's latest work here.What will I be doing?Designing, building, and maintaining comprehensive web solutions, encompassing modern user interfaces, backend services, APIs, and infrastructure.Collaborating with design, brand, marketing, and content teams to ensure seamless, high-performing experiences across web and mobile platforms.Developing backend logic and APIs, managing data flows, and integrating systems with third-party platforms.Enhancing website performance by implementing best practices in front-end development, such as lazy loading and efficient asset management.Setting up and managing infrastructure using tools like Vercel, AWS, Cloudfront, Terraform, and CI/CD pipelines.

Who Are We? At Ki Insurance, our influence can be seen in various groundbreaking headlines. From insuring space shuttles to world tours, wind farms, and even the legs of footballers, our impact is substantial.Our mission aims to digitally disrupt and transform a 335-year-old industry. Collaborating with Google and UCL, we have developed a platform that leverages algorithms, machine learning, and large language models, enabling insurance brokers to receive quotes in mere seconds rather than days.As the largest global algorithmic insurance carrier, Ki is the fastest-growing syndicate within the Lloyd's of London market, achieving a remarkable $100 million in profit within just three years.Our teams consist of diverse talents working in an agile, cross-functional environment, dedicated to delivering the best possible experience for our customers. With ambitious goals ahead, we seek exceptional minds to challenge the status quo and help us explore new heights.Your Role:As a Senior Full Stack Engineer, you'll be an integral part of our development team, contributing to our broker platform, which is vital to Ki's success. Our multi-disciplinary team combines expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. We focus on delivering impactful features through an iterative and analytical approach.Your Responsibilities: Develop robust and scalable software for critical web-based applications.Create visually appealing, functional, and efficient web and mobile sites that enhance these applications.Design, build, test, document, and maintain APIs and integrations.Implement quality control through industry-standard practices such as automated testing, pair programming, and code reviews.Collaborate with the Product team to translate end-user requirements into effective technical solutions.Document technical designs and analyses.Evaluate current system architecture for growth and improvement opportunities.Construct mock-ups or prototypes for exploring and troubleshooting new initiatives.Engage with the Product team and UX designers to review designs, implement new features, and ensure an exceptional user experience.Investigate new ideas and emerging technologies, rapidly developing prototypes.Promote and enhance the engineering team’s principles and methodologies.Act as a domain expert for Ki’s core technologies.Mentor and coach colleagues in engineering and business aspects.

Join our dynamic and innovative team at Ratio Recruitment Ltd as a Full Stack Web Developer. In this role, you will utilize your expertise in both front-end and back-end technologies to design, develop, and maintain high-quality web applications. You will collaborate with cross-functional teams to deliver exceptional user experiences while ensuring technical feasibility.

Join our innovative team at Faculty as a Senior Full Stack Software Engineer. In this pivotal role, you will leverage cutting-edge technologies to design and implement robust software solutions, driving our mission to harness AI for impactful outcomes. Collaborating with cross-functional teams, you will address complex challenges and deliver high-quality products that meet user needs.If you are passionate about technology, enjoy problem-solving, and thrive in a dynamic environment, we want to hear from you!

Overview Join Tipalti, a dynamic fintech company located in the heart of London, dedicated to automating financial workflows for small and medium-sized businesses. Our engineering culture is robust, collaborative, and focused on making a tangible impact for our clients. As a Senior Full-Stack Engineer, you will merge hands-on engineering skills with a product-oriented mindset. You will define requirements, engage in technical discussions, and influence user experiences while managing the entire software development lifecycle. Responsibilities Develop robust, efficient, and well-tested code across the technology stack. Create new features and enhancements that align with product priorities. Participate in design and architecture discussions, shaping the technical direction. Review code with team members, ensuring clean code practices and quality standards are met. Collaborate closely with Product Managers to clarify requirements and propose solutions. Proactively identify questions, edge cases, and assist in refining specifications. Provide technical insights into prioritization and product decisions. Communicate effectively with designers, engineers, and stakeholders. Share knowledge and mentor colleagues as needed. Engage with external partners and vendors for integration work when necessary. Requirements Experience building across the full stack and a keen interest in learning new technologies. A passion for writing clean, maintainable, secure, and well-tested code. Strong collaboration skills and a preference for team environments. A curiosity about customer needs and the ability to translate them into technical solutions. A commitment to continuous learning and knowledge sharing within the team. Preferred Tech Skills Proficiency in JavaScript / TypeScript, Node.js, and React (or similar frameworks). Experience with REST APIs or microservices architecture. Familiarity with MongoDB. Knowledge of cloud services, particularly AWS. Why Join Tipalti? An open, inclusive, and supportive engineering culture.‍ Opportunities to build products utilized by some of the world’s fastest-growing companies. Equity options in a late-stage scale-up.

About the Role Abound is hiring a Senior Full Stack Engineer in London. This position focuses on building and improving web applications, working across both front-end and back-end systems. The team values practical solutions and a collaborative approach. What You Will Do Design and implement scalable web applications Work with cross-functional teams to deliver new features Contribute to both front-end and back-end development Help create a strong user experience through thoughtful engineering What We’re Looking For Solid experience with both front-end and back-end technologies Comfort working closely with colleagues from different disciplines Ability to deliver reliable, maintainable code

Become Our Foundational Engineering Leader at Civic Marketplace!Are you driven by the potential of technology to foster significant change within communities? At Civic Marketplace, we are innovating the process by which local governments acquire and provide essential services, crafting the most user-friendly and effective procurement platform for the future.Why Choose Civic Marketplace?We are a mission-oriented startup dedicated to reshaping the operational landscape for local governments—eliminating obstacles, streamlining workflows, and ultimately enhancing outcomes for citizens. If you thrive in a startup environment and wish to join a purpose-driven team effecting genuine change, this role is tailored for you.Who We’re Seeking:We are in search of our inaugural engineering hire—a proactive technical leader prepared to take full ownership of our technology landscape. You will spearhead our technical vision, enhance our codebase, and assemble a high-performing team to achieve our ambitious objectives. You will be a pivotal figure in our expanding organization, with the autonomy to define our technological strategy and architecture.Key Responsibilities:Lead the execution of our full-stack development initiatives, ensuring seamless ownership of code from inception to deployment. You will be our full-time lead engineer, collaborating with teams to facilitate execution through the establishment of effective processes, setting clear expectations, managing risks, resource allocation, and removing impediments.Craft a quality assurance playbook for your teams, establishing standards for code reviews, pull requests, testing, and monitoring. You will actively contribute to coding while also delegating tasks and hiring talent as necessary, including working with freelancers.Demonstrate proficiency in REACT, marketplace dynamics, payment infrastructure, and hybrid development approaches utilizing both custom and no-code/low-code solutions.Ensure your team manages the operation of data, systems, and applications in production, driving the resolution of critical issues through root cause analysis.Foster hiring, motivation, and professional growth among team members by developing a deep understanding of their motivations, strengths, and growth opportunities. Align personal growth opportunities with organizational impact.

Join our innovative team at Spotify for Authors (SFA), the premier platform revolutionizing the audiobook industry. As a Senior Full Stack Engineer, you will play a pivotal role in developing a robust web application that empowers publishers, authors, and narrators with essential tools for catalog management, performance tracking, and content distribution on Spotify. We are on an exciting journey to scale our user base to 100,000, utilizing a cutting-edge React/TypeScript frontend and Java backend services, complemented by data pipelines that enhance our audiobook ecosystem. At SFA, we are directly contributing to Spotify's key initiatives: improving audiobook accessibility, advancing content creation tools, and refining discovery mechanisms. Our philosophy embraces collaboration, where contributions know no boundaries, quality is a shared goal, and we leverage the latest technologies, including AI, to minimize manual tasks and amplify creative expression.

About EucalyptusAt Eucalyptus, we are dedicated to ensuring that good health lasts a lifetime. With over 1 billion individuals battling obesity globally, leading to preventable chronic conditions, our mission is to create superior long-term care solutions.Euc is the innovative force behind Juniper, one of the largest weight-management programs in the world that integrates GLP-1 medication with personalized nutrition, movement support, and clinician-led care from prescribers, nurses, health coaches, pharmacists, and dietitians. Our published clinical research indicates that our comprehensive clinical and behavioral strategies enable patients to achieve four times more weight loss during their Juniper treatment.Our Growth Story:Achieved 130% year-over-year revenue growth while reducing cash burn by 90%, securing over $100M from notable investors such as BOND, NewView, Blackbird, and Airtree.Supported more than 350k patients struggling with obesity across five international markets.Received a selective NICE endorsement to deliver services to the NHS.Customized our offerings to meet the needs of thousands of patients in Germany and Japan. Help shape Juniper and our growing product ecosystem with full-stack impactThe Shop/Ecosystem squad is committed to diversifying Juniper into new product lines and areas of care, ensuring patients find the right products and services precisely when they need them. One of the most exciting projects will be a recommendations tool, developed in close collaboration with our Data Science team, aimed at enhancing how patients engage with Juniper and various product lines across both web and mobile platforms.

Flatiron Health is hiring a Senior Full Stack Software Engineer for its London office. This role centers on building data-driven tools and products that support better cancer care. The team’s mission is to improve and extend lives by drawing insights from the experiences of people affected by cancer. About Flatiron Health Flatiron Health works with cancer centers across the US, Europe, and Asia, transforming real-world patient data into evidence that can inform care and research. Teams include oncologists, data scientists, software engineers, epidemiologists, and product specialists, all collaborating to advance oncology. What You’ll Do Design and build technology solutions with engineering teams based in the US, UK, Germany, and Japan. Work closely with oncologists, clinicians, product leaders, and quantitative scientists to solve technical and business challenges. Help shape team roadmaps and contribute to ongoing technical improvements. Support the growth and culture of Flatiron’s European engineering teams. Develop creative approaches to complex problems in healthcare technology. Iterate quickly on products while following engineering best practices for quality and security. Work with complex data pipelines and a range of data processing tools. Bring or build deep knowledge of the UK healthcare landscape, especially around data sources, security, privacy, and new trends. Who We’re Looking For Full Stack Software Engineer with 4-8 years of relevant experience. Comfortable working in a fast-moving setting and able to think creatively and adapt quickly. Interested in a technology-driven culture that values innovation and measurable business impact. Experienced in agile development and object-oriented programming languages such as Python, Java, C#, or SQL, and open to learning new technologies. Knowledge of healthcare systems, especially in the UK, is a plus. This role offers the chance to work alongside experts from multiple disciplines and make a meaningful contribution to cancer care through technology.

Join Our Visionary Team to Create the Premier Training Platform for RunnersAt Runna, we empower everyday runners to achieve their best by developing an exceptional app that offers top-tier training, coaching, and community support. Whether you're aiming to enhance your 5k performance or prepare for your inaugural marathon, we're here to guide you every step of the way.Our growth trajectory is remarkable! In November 2023, we successfully 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 recognized by Apple as one of three global finalists for the iPhone App of the Year, showcasing the innovation and impact of our platform. The journey continued with our acquisition by Strava in 2025!Our aspirations are ambitious: we aim to be the leading global training platform for millions of runners worldwide. As we evolve with purpose, we seek passionate individuals who want to contribute to something meaningful and impactful. With Strava's recent acquisition propelling our mission forward, this is an extraordinary time to become a part of our journey. The Growth Team You’ll Be JoiningWe are on the lookout for a skilled, inquisitive, and experimentation-driven Senior Full Stack Engineer to join our Growth Engineering team. This team is responsible for critical aspects of the user journey at Runna, focusing on both web and app platforms to craft high-quality experiences that convert first-time visitors into dedicated subscribers. You will collaborate closely with product, design, and data teams, as well as our founders and CTO, to enhance how new users discover and engage with Runna.Your ResponsibilitiesDesign, develop, test, and deploy high-impact user journeys and subscription funnels aimed at transforming curious visitors into active, engaged subscribers.Create and execute experiments across both web and app (including onboarding processes, paywalls, and plan discovery experiences) to optimize conversion at every stage of the user journey.Work collaboratively with Product, Design, and Data teams to identify opportunities, establish clear success metrics, and make informed decisions based on experimental outcomes.Partner with other teams to ensure users enjoy a seamless and consistent experience as they navigate through various products and platforms.Implement and sustain the instrumentation, tracking, and tools necessary for understanding user behavior, quickly identifying issues, and accurately measuring impact.Take ownership of features and initiatives that drive user engagement and retention.

Role overview Legal & General is seeking a Senior Full Stack Software Engineer based in London. This position centers on crafting and delivering software solutions tailored to a range of client requirements. The role combines hands-on coding with close teamwork alongside colleagues from various backgrounds. What you will do Design and build software systems, working on both front-end and back-end components Work with cross-functional teams to create dependable products Guide and mentor junior developers, sharing technical knowledge within the group Support and improve software development best practices

Senior Full‑Stack/AI Engineer (Backend-leaning)About Us:At AND Digital, we are a forward-thinking tech company committed to enhancing digital delivery and bridging the digital skills gap. Since our inception in 2014, we have partnered with organizations to create exceptional digital products and to strengthen their digital teams.Our mission is to leave a lasting legacy for our clients. We achieve this by fostering close relationships within our regional offices or ‘Clubs’, ensuring that our partners receive priority service from a dedicated local team.This innovative approach has led to significant success for both our clients and ourselves, as demonstrated by our impressive organic growth since 2014. We now boast over 1,300 talented individuals across Clubs throughout the UK and Europe, with ambitious plans for global expansion in the coming years.Join us on our mission to close the world’s digital skills gap!What You Will Contribute:Core Technical Skills:Extensive hands-on experience in backend engineering, proficient in one or more languages such as Java, Node.js, TypeScript, Python, or Go, with the flexibility to work across multiple languages as necessary.Proven track record in designing and implementing scalable, resilient, and maintainable backend systems, including REST/GraphQL APIs, event-driven architectures, and distributed services.Hands-on experience with AWS (including services such as Lambda, ECS, DynamoDB, SQS/SNS, API Gateway, Step Functions, etc.) and a strong grasp of cloud-native patterns. Familiarity with GCP, Azure, or other cloud platforms is a plus.Solid experience in Infrastructure as Code (preferably Terraform), CI/CD pipelines, and modern deployment methodologies.Comfortable working across the entire tech stack, contributing to frontend codebases when required, while maintaining a primary focus on backend and systems engineering.Demonstrates technical leadership by shaping architectural direction, reviewing designs, and exemplifying high-quality engineering practices.A strong foundation in system design, including trade-off analysis, performance considerations, observability, and operational readiness.Able to take ownership of complex technical challenges, make pragmatic decisions, and articulate reasoning effectively to both technical and non-technical stakeholders.AI & Emerging Technologies:Hands-on experience integrating AI into backend systems, such as orchestrating AI services, creating AI-driven workflows, or utilizing AI tools to enhance engineering productivity.Experience in developing AI-enabled systems (including solutions based on LLM or RAG) from MVP or proof-of-concept to production-ready implementations, with an emphasis on reliability, evaluation, security, and maintainability.Ability to discern where AI can meaningfully enhance backend systems (e.g., classification, summarization, anomaly detection) as opposed to traditional algorithms.

Join Trainline as a Full Stack Engineer and contribute to the evolution of digital travel. In this role, you will design and implement scalable web applications that enhance user experiences. Collaborate closely with product managers and designers to shape innovative features that meet customer needs.

Join Us in Revolutionizing the Creator Economy with AIFanvue is a rapidly expanding platform at the forefront of creator monetization worldwide. Our AI-driven, creator-centric platform empowers creators to connect, engage, and earn directly from their audiences on a larger scale. After securing our recent Series A funding, Fanvue has achieved over $100M in annual recurring revenue and continues to experience triple-digit year-over-year growth, supporting countless creators and millions of fans globally.At the heart of Fanvue’s revenue model are our checkout and payment systems. This position is dedicated to developing fast, reliable, and scalable checkout and fintech solutions that significantly influence creator earnings, fan conversion, and overall revenue expansion. Your ResponsibilitiesWe are seeking a Full Stack Engineer to contribute to Fanvue’s checkout, payment, and fintech functionalities. This impactful role will focus on designing and managing end-to-end payment processes, encompassing frontend checkout experiences and backend payment services, subscriptions, and payouts.You will collaborate closely with Product, Design, and fellow engineers to rapidly deliver revenue-critical features while upholding high standards of reliability, security, and scalability. Key ActivitiesDesign, develop, and deploy comprehensive checkout and payment solutions across both web and backend platformsOwn and optimize frontend checkout processes to enhance conversion rates and reduce friction for usersDevelop and sustain backend services for subscriptions, messaging payments, and payoutsIntegrate with payment providers and manage retries, fallbacks, and edge case scenariosCollaborate intimately with Product and Design teams to explore monetization and conversion optimization strategiesEnsure payment systems are dependable, observable, and secure in a production environmentTroubleshoot and resolve issues across the entire stack, from user interface to payment processingLeverage data and experimentation to inform product and technical decisions Your ProfileProven experience in full stack engineering, with a strong focus on backend systemsProficient in navigating both frontend and backend codebasesExperience with contemporary web technologies including TypeScript, Node.js, React, and relational databases

Who We Are:At Omaze, we empower our community in the UK and Germany to win luxurious homes and transformative prizes while supporting the causes they cherish.With the support of our Omaze Community, we’ve successfully raised over £100 million for UK charities in just five years. This funding has been vital for organizations such as Age UK, the RSPCA, British Heart Foundation, and Great Ormond Street Hospital Charity, enabling them to carry out life-saving work.And the exciting part? We’re just getting started! Omaze is dedicated to fostering a business and culture that prioritizes growth and creates a significant social impact on a global scale.Why You’ll Love Working at Omaze:Growth: Join one of the fastest-growing companies globally.Impact: Collaborate with a team of change-makers committed to creating a ripple effect of good.Innovation: Be part of an initiative that’s paving new paths for social good.Culture: We work diligently, grow together, and spread positivity throughout our journey. About The RoleAs a Senior Full Stack Engineer, you will leverage your extensive experience to develop innovative platforms aimed at empowering nonprofits in their transformative missions. Your commitment to code quality and craftsmanship drives you, alongside a strong desire to deliver customer value. Ideally, you possess a comprehensive understanding of various technologies, applying them effectively to design features or systems.Effective communication and organizational skills are key to this role. You will translate ideas and requirements into actionable work units, collaborating seamlessly with both technical and non-technical audiences. A continuous improvement mindset will enable you to enhance both your own skills and those of your colleagues. You value diversity, inclusivity, and enjoy mentoring others in their professional growth.In this position, you will take ownership of the technical quality, execution, and delivery of user stories. Your ResponsibilitiesUtilize your software and full-stack expertise to collaborate with a close-knit engineering team focused on building platforms for social good.Write, test, and maintain code and infrastructure that drives the application.Participate in designing and implementing new features that enhance user experience.

About YASOYASO serves as the ultimate operating system tailored for international brands entering the Chinese market, crafted by a dedicated team of experts in China, technology, and startup operations. Our innovative plug-and-play solution seamlessly manages the entire spectrum of cross-border ecommerce and social commerce, encompassing store operations, pricing strategies, influencer collaborations, and logistics—all driven by our proprietary technology.We empower brands with complete visibility across all performance metrics, including traffic, conversion rates, revenue, influencer ROI, content management, and inventory levels. For the first time, brands can monitor and manage their business operations in China in real time, utilizing data that is transparent, measurable, and actionable.By transforming outdated legacy systems into a cohesive, data-driven infrastructure, YASO enables international brands to reclaim control over their growth trajectory in China.In light of our recent Series A funding round, we are excited to expand our global team across London, Shanghai, and beyond, as we redefine the future of cross-border retail.The RoleJoin our dynamic team to collaborate with our Product Manager and engineering professionals to develop customer-facing platform features and internal tools that facilitate a self-service experience for our enterprise customers. You will be responsible for deploying data integrations, operational tools, and independent product capabilities that are essential to scaling our customer base tenfold.Reporting directly to our Founder (James, located in London), you will engage daily with your team members, the Product Manager, and YASO's operations team in Shanghai. You will also have regular opportunities for in-person collaboration with our international teams across Europe and Shanghai.Within your first 60 days, you will have successfully deployed at least one feature that our operations team or customers utilize weekly, taking ownership of the entire process from inception to delivery.You WillDevelop end-to-end features from database schema to user interface that address genuine operational challenges and yield significant impact for our team and customers.Design and implement APIs that support both internal tools and customer-facing platform functionalities, ensuring security, scalability, and maintainability.Translate product requirements into technical solutions. Collaborate with our Product Manager to refine specifications, evaluate feasibility, and identify architectural concerns before they escalate.Take ownership of your code in production. Manage deployment, monitoring, troubleshooting performance issues, and maintaining the systems you create.Work asynchronously across time zones. Engage daily with our engineering team in Shanghai, contributing to a shared data infrastructure and our unified codebase.Participate in the EU-based on-call rotation to uphold system reliability.Influence our engineering culture through comprehensive code reviews, documentation, and sharing best practices with the team.Shape our roadmap by providing valuable technical insights on our strategic direction.

About Multiverse Multiverse builds an upskilling platform focused on AI and technology skills. More than 1,500 companies partner with us to deliver practical learning for today's workforce. Our apprenticeships support people at every stage of their careers, helping them gain critical skills in AI, data, and technology. Learners at Multiverse have delivered over $2 billion in ROI for their employers by applying new skills to real business challenges. In June 2022, we closed a $220 million Series D funding round, co-led by StepStone Group, Lightspeed Venture Partners, and General Catalyst. This brought our post-money valuation to $1.7 billion and made us the UK’s first EdTech unicorn. Today, our team includes more than 800 employees. With a strong operational base, we are scaling our impact and remain committed to unlocking potential through technology skills. Our Mission We aim to empower the workforce for success in the AI era by making essential tech skills accessible to all.

Veeva Systems stands at the forefront of the life sciences industry as a pioneering cloud-based organization. Our mission is clear: to empower life sciences companies to expedite the delivery of therapies to patients. Recognized as one of the fastest-growing SaaS companies, we achieved over $2 billion in revenue last year, with immense potential for further growth.At Veeva, our core values drive us: Do the Right Thing, Customer Success, Employee Success, and Speed. We are more than just a public company; we made history in 2021 by becoming a public benefit corporation, legally committed to balancing the interests of our customers, employees, society, and investors.As a Work Anywhere organization, we promote flexibility, allowing you to work remotely or in the office to thrive in the environment that suits you best.Join us in transforming the life sciences landscape and making a meaningful impact on our customers, employees, and communities.The RoleAs a Senior Full Stack Engineer at Veeva Link, you will contribute to creating the intelligence layer for life sciences. We focus on developing connected data applications that not only accelerate drug development but also enhance patient outcomes. Our belief is that merging high-quality data with cutting-edge software yields exceptional value.We prioritize execution, valuing speed, accuracy, and quality in our daily endeavors. Our engineering methodology emphasizes clear product definitions that lead to thoughtful technical designs, utilizing a modern tech stack to create reliable applications that deliver outstanding user experiences.Our work is centered around two key domains:Data-Driven InsightsWe craft sophisticated applications that analyze and comprehend global scientific and medical expertise, yielding impactful insights and AI-driven intelligence. Our engineers tackle complex challenges in data modeling, entity resolution, and advanced machine learning.Intelligent Business WorkflowsOur focus is on designing intelligent business workflows that significantly improve operational efficiency across the life sciences sector.