Senior Software Engineer - London

About SequenceJoin Sequence and play a pivotal role in creating a transformative platform that empowers businesses to streamline their payment processes. Already processing over $1 billion in annual invoice volume, we're on a remarkable growth trajectory.Our cutting-edge, AI-powered revenue platform is designed specifically for modern finance teams, replacing outdated spreadsheets and clunky legacy systems with intuitive software that enhances productivity.Trusted by Cognition, incident.io, MoonPay, and more than 100 high-growth companies, we manage their entire revenue cycle—from quoting and billing to revenue recognition.Founded by experienced entrepreneurs, we achieved a remarkable 10x growth in ARR last year and recently secured a $20 million Series A led by 645 Ventures, with participation from a16z and esteemed founders and CFOs from notable companies like Decagon, Klaviyo, and Wise.What is it like to work at Sequence?At Sequence, you'll be part of a small team with significant opportunities for impact and ownership. You will engage in meaningful work, connect directly with customers, and grow with the company.If you're ready to do the best work of your career at a rapidly scaling company, we would be thrilled to meet you.The RoleWe are seeking skilled software engineers with robust backend and cloud infrastructure experience to develop and enhance the systems that drive billing for contemporary B2B companies.You will take ownership of infrastructure critical to our revenue stream, where precision is paramount and downtime is not an option. Our usage events platform processes each merchant action that influences customer billing, making it one of our most vital systems. You will contribute to the evolution of this platform to accommodate exponential growth while ensuring impeccable accuracy.This is a unique opportunity to join at an early stage where you can make significant architectural decisions while having real customers relying on your work. You'll design systems that manage high-velocity event streams, make technical choices that optimize cost and performance at scale, and establish infrastructure that prioritizes reliability.What You'll Do:Own critical event infrastructure. You'll develop systems that process customer usage data essential for billing and invoicing, designing event streaming pipelines that manage high throughput with minimal latency, and building robust systems where data accuracy is non-negotiable and uptime is measured in nines.

Join Sequence as a Product Engineer in London, where you'll be at the forefront of designing and developing innovative product solutions. We seek a passionate individual who thrives in a dynamic environment and is eager to tackle challenges head-on.

About SequenceJoin Sequence and play a pivotal role in developing a revolutionary platform that facilitates seamless payment solutions for businesses. With over $1 billion in annual invoice processing and a trajectory of rapid growth, we are at the forefront of transforming financial operations.Our AI-powered revenue platform is designed specifically for modern finance teams, replacing outdated spreadsheets and cumbersome legacy systems with intuitive software that enhances performance and user satisfaction.Trusted by over 100 high-growth companies, including Cognition, incident.io, and MoonPay, we manage the entire revenue cycle, from quoting to billing and revenue recognition.Founded by a team of seasoned entrepreneurs, we achieved an impressive 10x ARR growth last year and recently secured a $20M Series A led by 645 Ventures, along with contributions from a16z and remarkable founders and CFOs from notable companies like Decagon, Klaviyo, and Wise.What’s it like to work at Sequence?We offer a small team environment with vast opportunities for impact and ownership. You will engage in meaningful work, gain direct access to customers, and develop alongside a rapidly growing company.If you’re ready to elevate your career at a fast-scaling company, we’re eager to connect with you.Your RoleWe are deeply committed to the quality of our product and are seeking passionate engineers who take end-to-end ownership—from conception to delivery and ensuring that our solutions meet customer needs.Here are some projects you may contribute to:Developing AI-Driven Approval Workflows. Create flexible, customizable approval chains that adapt to various business rules, enabling customers to define workflows in natural language.Creating an Intelligent Collections Agent. Design an automated agent that manages payment reminders and escalations through natural language instructions.Scaling Billing Infrastructure. Redesign our billing pipeline to handle significant increases in throughput while optimizing costs and storage strategies.As part of our lean team, you will have the opportunity to significantly influence our engineering practices and product direction.

Join our innovative team at Sequence as a Senior Product Designer in London. In this pivotal role, you will be responsible for driving the design process, from brainstorming initial ideas to executing polished user interfaces that enhance the user experience. Collaborate closely with cross-functional teams to transform complex challenges into elegant design solutions.The ideal candidate will possess a strong portfolio showcasing their design expertise across digital products, a deep understanding of user-centered design principles, and the ability to work effectively in a fast-paced environment. If you are passionate about creating impactful designs and thrive on collaboration, we want to hear from you!

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.

We are seeking an experienced Senior Software Engineer to join our innovative team at AECOM in London. In this role, you will be responsible for designing, developing, and implementing software solutions that meet client needs. You will collaborate with cross-functional teams to deliver high-quality products and improve our software development processes.

Join Aircall, a leading unicorn in the customer communications sector, revolutionizing the way businesses connect with their customers. Our AI-powered platform, trusted by over 22,000 companies globally, integrates voice, SMS, WhatsApp, and AI into a single cohesive workspace, enhancing revenue generation, expediting issue resolution, and empowering customer-facing teams.At Aircall, we believe in working smarter, not harder. Our AI Voice Agent automates routine calls, AI Assist simplifies post-call tasks, and AI Assist Pro offers real-time support, enabling teams to perform at their best. This innovation leads to increased revenue, quicker resolutions, and scalable teams.Headquartered in Paris, with a robust presence in North America centered in Seattle, Aircall has teams across various cities including Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. We have crafted a beloved product and a rapidly growing business, supported by top-tier investors and driven by swift AI advancements across our offerings.At Aircall, you will become part of a dynamic and ambitious organization, where product excellence and execution are paramount. We prioritize swift decision-making, visible impact, and genuine growth.Our Work Culture: We are dedicated to our customers, rely on data-driven insights, and are focused on delivering impactful results. We value responsibility, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-paced environment where trust and impact are essential, you'll fit right in.We are seeking a motivated and passionate Senior Software Engineer to join our expanding engineering team and contribute to our innovative projects.In this role, you will be responsible for the design, development, deployment, and operation of critical features that enhance customer satisfaction. You will focus on operational excellence, metrics, observability, and best practices while mentoring your peers within the engineering team.With a commitment to quality, excellence, and agility, you will help elevate our delivery processes. Utilizing a NodeJS and Typescript back-end stack hosted on AWS, you will ensure that our solutions meet the highest standards.

Join Our Team!Are you an innovative Senior Software Engineer looking to make a significant impact? At Perk, we are redefining the landscape of travel and spend management with our intelligent platform. Our mission is to eliminate the tedious manual tasks that hinder productivity, allowing professionals to focus on what truly matters.Since our establishment in 2015, we've grown to serve over 10,000 companies globally, including renowned names like Wise, On Running, and Breitling. Our cutting-edge tools streamline everything from travel bookings to expense management, addressing a staggering $1.7 trillion problem of lost productivity.With a vibrant workforce of over 1,800 talented individuals across 12 offices, we are committed to fostering innovation and enhancing workplace culture. We believe in the power of curiosity, purpose, and teamwork, and we want you to be part of our journey to transform how businesses operate.

Join our dynamic team at sequence as a Senior Revenue Associate in London, where you will play a crucial role in driving revenue growth and optimizing financial processes. This position offers the opportunity to work in a fast-paced, collaborative environment where you can make a significant impact on our business operations.

Join our innovative team at Faculty as a Senior Software Engineer. In this role, you will leverage your technical expertise to design, develop, and maintain software solutions that drive our mission forward. You will collaborate with cross-functional teams to deliver high-quality products that meet the needs of our clients.The ideal candidate is passionate about technology, possesses strong problem-solving skills, and has a proven track record in software engineering. If you thrive in a fast-paced environment and want to make a significant impact, we want to hear from you!

Strideup is seeking a Senior Software Engineer to join the team in London. This role centers on developing and enhancing software products that align with business objectives and provide a high-quality user experience. Day-to-day work is hands-on and involves working closely with colleagues from various departments. Responsibilities Design and build software solutions for both new initiatives and ongoing projects Collaborate with team members from different backgrounds to deliver scalable applications Use programming expertise and software design principles to address technical challenges Take part in project planning and contribute to the successful rollout of new features Requirements Strong programming background and experience in software design Skilled at solving complex technical problems Comfortable working as part of a cross-functional team This position is located in London, England, United Kingdom.

Join our innovative team at unlikelyai as a Senior Software Engineer, where you will have the opportunity to develop cutting-edge solutions that push the boundaries of artificial intelligence. In this role, you will collaborate with a talented group of professionals, leveraging your expertise to optimize our software development processes and deliver high-quality products.

About the RoleJoin our innovative Digital Twin team as a Senior Software Engineer at On, where you will be pivotal in developing the technological framework that allows us to track and identify products across our warehouses, retail locations, and beyond using cutting-edge technologies like RFID. This role is essential within the Operations cluster, significantly impacting how we collaborate with our supply chain, warehouse, and commercial partners, ultimately shaping the success of On.At On, we are committed to ensuring that everyone globally has access to the best sportswear. To achieve this goal, we require high-performance solutions that guarantee the right products reach customers at the right time, while also making the entire process efficient, sustainable, and environmentally friendly.

Overview Join Tipalti as a Senior Software Engineer and play a crucial role in developing and delivering impactful product features that enhance customer satisfaction and address significant business challenges. Collaborate closely with Product Managers, Designers, and cross-functional engineering teams to transform product visions into scalable, secure, and maintainable software solutions. This role integrates hands-on engineering with a product-focused mindset, allowing you to define requirements, engage in technical discussions, and influence user experience while owning the entire software development lifecycle. Responsibilities Engineering & Delivery Create robust, efficient, and well-tested code across the software stack. Implement new features and enhancements in alignment with product priorities. Engage in design and architecture discussions to refine technical direction. Review code with peers, uphold clean code practices, and ensure quality standards are met. Product Collaboration Partner closely with Product Managers to clarify requirements and propose solutions. Proactively raise questions, identify edge cases, and assist in refining specifications. Contribute technical insights into prioritization and product decision-making. Cross-Functional Communication Communicate effectively with designers, engineers, and stakeholders. Share knowledge and mentor team members as appropriate. Collaborate with external partners and vendors on integration work when necessary. Requirements You are: Skilled in full-stack development and enthusiastic about learning new technologies. Committed to writing clean, maintainable, secure, and thoroughly tested code. Collaborative and communicative, thriving in team environments. Curious about customer needs, adept at translating them into technical solutions. Dedicated to continuous learning and sharing insights with your team. Preferred Technical Skills Proficient in JavaScript / TypeScript, Node.js, React (or similar technologies). Experience with REST APIs or microservices. Familiarity with MongoDB. Knowledge of cloud services, particularly AWS. Why Join Tipalti? Become part of an innovative and dynamic team at Tipalti, where your contributions will directly impact the growth and success of our products and services.

Embark on an exciting journey with us as we aim to transform real estate transactions into a seamless, swift, and intelligent process. The real estate market, being the largest asset class globally, still relies heavily on outdated and manual legal procedures. Legal professionals find themselves wading through tedious documents, while clients expect quicker and more transparent due diligence. Enter Orbital Copilot, our AI-powered assistant tailored for commercial real estate law. Created in collaboration with experienced real estate lawyers, it enhances complex due diligence processes by up to 70%, all while maintaining legal-grade accuracy. With a recent infusion of $60 million in Series B funding, we are poised for rapid expansion in the UK and US markets. Leading firms like Goodwin and BCLP trust us to eliminate redundant tasks, empowering legal teams to concentrate on delivering expert legal advice, exceptional client service, and closing deals more efficiently. Joining Orbital means becoming part of a dynamic team that is reshaping the future of real estate transactions—where speed, collaboration, and the ability to make a significant impact from day one are paramount.Your RoleAs a Senior Software Engineer, you will create innovative tools that revolutionize the transfer of the world’s largest asset class. We are shifting property transactions from manual document reviews to an automated AI solution that operates with the mindset of a real estate lawyer.Your contribution will not be limited to executing builds; you will leverage your expertise to guide product development and lay the groundwork for our next phase of growth, offering you real influence over our creations.Key ResponsibilitiesDevelop and deploy production software, transforming concepts into dependable customer-facing features.Collaborate with a close-knit team of engineers to design and implement new functionalities.Utilize AI coding agents to generate, iterate, and refine high-quality production code.Engage with a technology stack that typically includes TypeScript, React, PostgreSQL, and Python, while reviewing and guiding code produced by AI agents.Contribute to technical design and architecture decisions.

About DialpadDialpad is an innovative leader in AI-driven customer communication solutions, revolutionizing the way businesses engage with their clientele. Trusted by over 50,000 organizations worldwide, including renowned names like Netflix, RE/MAX, Uber, Randstad, and Tractor Supply, Dialpad empowers companies to enhance customer relationships through real-time, AI-powered insights. Explore more at dialpad.com.Join Our TeamAt Dialpad, you will collaborate with a dynamic team dedicated to our mission of ensuring the success of our customers and their employees. Every conversation is significant, and our platform elevates each interaction with real-time insights and automation for our clients.We embrace continuous growth, allowing every team member to leverage cutting-edge AI to refine our platform and enhance their own skills. We seek individuals who not only meet our high expectations but exceed them. Our ambitious goals require a team that operates at peak performance, and we look for candidates who embody the qualities essential to our success: Resourceful, Inquisitive, Positive, Tenacious, and Compassionate.Your RoleWe are on the lookout for a dedicated and skilled Senior Software Engineer who is enthusiastic about developing high-quality, scalable web and desktop native applications utilizing modern frontend and backend technologies. You will take ownership of significant features from start to finish, overcome technical challenges, and contribute to the team's growth by mentoring junior engineers. Collaborating with fellow engineers, you will guide projects to deliver major features, while working closely with Product Managers to advocate for technical initiatives within the team.Reporting StructureThis position reports directly to our Engineering Manager located in London. We are looking for someone to join our team in our London office. Please note, this is a hybrid role, with an expectation to be in the office 2-3 times per week.

Join Relay, a pioneering force in the evolution of online logistics. With a historic Series A funding round of $35 million, led by Plural, a notable deep-tech investor, Relay is outpacing 99.98% of venture-backed startups. We are building an exceptionally talented team, setting new standards in the logistics sector.Our Mission is to eliminate friction in commerce. High delivery costs are a hidden barrier to e-commerce, influencing what can be sold online and who can participate in the market. We aspire to create a world where goods flow freely among people, ensuring a seamless and inclusive online shopping experience.Our Team consists of approximately 110 members, with over half dedicated to engineering, product, and data roles. We boast 45+ advanced degrees in disciplines such as computer science, mathematics, and operations research. With thousands of data points meticulously captured and analyzed for each parcel, we cultivate a culture of first-principles thinking, robust feedback loops, and a commitment to experimentation.Collaborate with Industry ExpertsDiego Protas – Director of EngineeringDiego specializes in distributed systems and hardware architecture, integrating physical computing with scalable enterprise infrastructure. With experience leading over 170 engineers at Mercado Libre and driving large-scale ML-based inference at Meta, Diego’s dynamic leadership at Relay is setting new benchmarks for speed and reliability.Technical EnvironmentUtilizing Python, Rust, and TypeScript to ensure we employ the best tools for our projects.Developing cross-platform Flutter applications with a focus on exceptional user experience.Operating in a cloud-native environment on GCP, leveraging BigQuery and Cloud Run.Engaging in extensive ML modeling and LLM inference as part of our daily operations.Integrating emerging technologies, including robotics and IoT functionalities.Your Role as a Software Engineer at Relay includes:Taking ownership of complex engineering challenges.

Senior Software Engineer I at Checkout.com, London About Checkout.com Checkout.com supports digital payments for companies like eBay, ASOS, Klarna, Uber Eats, and Sony. Headquartered in London, the company operates across six continents and focuses on simplifying online transactions for businesses worldwide. What You’ll Do Senior Software Engineers at Checkout.com help design and build advanced payment technologies. This work directly improves merchant capabilities and supports the company's global mission. The role involves: Leading projects that align with strategic goals Collaborating with teams that prioritize customer needs Bringing technical insight and creativity to solve new challenges Influencing engineering priorities and direction What Sets This Team Apart Innovation and performance drive the culture at Checkout.com. Every team member plays a part in shaping the future of fintech. Senior engineers are trusted with real responsibility and the chance to make a visible impact. Location This position is based in London. Learn more about the company at Checkout.com.

Our MissionAt Omnea, we are transforming the operational landscape for enterprise businesses, particularly addressing the complexities of procurement. This often cumbersome process can involve months of delays and a multitude of emails, drawing in departments such as Finance, Legal, Security, and IT for purchase approvals.With the backing of $75M from Khosla Ventures, Insight Partners, and Accel, we are committed to revolutionizing this space. Our AI-driven platform seamlessly integrates all stakeholders, ensuring that the purchasing process is swift, secure, and efficient. We provide a centralized system for requests, automated approvals, real-time supplier risk assessments, and comprehensive spend visibility.The market potential is significant, with over $7B available. Our growth trajectory demonstrates the scale of this opportunity, having increased our Annual Recurring Revenue (ARR) tenfold within 18 months, earning the trust of renowned global enterprises like Spotify, MongoDB, Monzo, and Albertsons. As of now, we proudly hold the title of the 4th fastest growing startup in Europe.Our team previously scaled Tessian (cybersecurity technology, backed by Sequoia, Balderton, Accel, and acquired post-Series C). Our members include former founders and operators who have successfully built unicorns, delivered exceptional products, and achieved high-level execution. You will collaborate with leaders such as Ben, Abs, Sabrina, and Rebe.What We're Looking ForWe are seeking a highly skilled and product-focused Senior Software Engineer to join our expanding engineering team and support Omnea in its next growth phase. In the upcoming year, we plan to double our team size, grow our enterprise client base from approximately 100 to over 200, and triple our revenue. In this position, you will be responsible for developing high-quality product features and systems, managing complex problem domains comprehensively, and making a direct impact on customer experiences as we transition from a startup to a scale-up.This is an exciting time to join us as we have recently secured $50M in Series B funding from Khosla Ventures...