Senior Backend Software Engineer (UK)

Our Mission 🚀At Bud, we are dedicated to revolutionizing financial data products that empower millions to take control of their finances. Our innovative solutions are utilized by some of the world's leading institutions.Your Mission 👨‍🚀👩‍🚀Join our dynamic team and play a pivotal role in crafting high-performance, scalable, and reliable applications usin…

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.

About Us: At Breakroom (https://www.breakroom.cc), we are on a mission to create a more equitable world by ensuring every job is a good job. We are developing a community-driven rating system for jobs globally, providing essential information to empower individuals in their career advancements while assisting employers in fostering positive work environments.With over 3 million users comparing their jobs and more than 18,000 employers rated across the UK and the US, we are committed to building an inclusive and top-tier team. We welcome applicants from all backgrounds.Position OverviewAs we prepare to launch Breakroom in the US, we are expanding our engineering and product development team. We seek passionate individuals who want to be part of an early-stage team focused on scaling our operations in a new market. Your responsibilities will include:Designing, writing, deploying, and maintaining high-quality codeCreating internal tools and refining our processesProviding your technical expertise to influence product and team decisionsOur technology stack includes Elixir, using the Phoenix web framework, alongside Postgres, Redis, Google Pub/Sub, and Elasticsearch. While familiarity with Elixir/Phoenix is preferred, we are committed to supporting you in learning these technologies on the job.Work CultureWe adopt a lightweight agile methodology in product development, heavily relying on data for informed decision-making while prioritizing user experiences. Our team thrives on collaboration, working closely with designers, product managers, and fellow engineers. To facilitate this teamwork, we operate from our Spitalfields office in London on Tuesdays and Wednesdays. We release updates multiple times a day and encourage engineers to engage fully in the lifecycle of their projects.Key RequirementsTo excel in this role, you should:Be driven by our mission to create equitable workplacesPossess 5+ years of experience in web software developmentHave in-depth knowledge of backend programming languages, including Elixir, Ruby, Python, or Node.jsHave experience with full-stack web frameworks like Phoenix, Ruby on Rails, or DjangoHave a track record of developing complex features and servicesCommunicate complex technical ideas effectively across diverse teamsHave experience managing operations for high-traffic websitesWork well in cross-functional teamsBe available to support Breakroom during off-hours as neededPreferred Qualifications:Experience working on consumer-facing applications

Gigs builds an operating system for mobile services, helping tech companies add global connectivity to their products. The platform simplifies telecom integration for businesses, from fintechs launching mobile services to HR platforms managing work phone plans. Backed by major investors and a team of around 100 across the US and Europe, Gigs brings together engineers and business experts from leading tech companies to tackle technical and regulatory challenges in telecom. What matters to us Speed: We move quickly, set ambitious goals, and treat each week as a chance to make progress. Ownership: Team members take initiative and solve problems as they find them. Customer focus: Our work centers on helping customers succeed. Comfort with ambiguity: We value sound judgment and adaptability in a complex, evolving field. First principles thinking: We question assumptions and look for the reasons behind the rules. Role overview Own complex backend challenges from start to finish. Work with teammates to design and deliver scalable solutions. Build products that let clients offer reliable connectivity services to their users. Uphold strong engineering standards and help improve our tools and processes. Design, develop, and maintain high-quality APIs and backend services. Work with our Ruby on Rails monolith and contribute to our move toward a more distributed system.

Please note that this position necessitates relocation to our Milan office.About SatispaySatispay is on a mission to transform the way people manage everyday payments, making them straightforward, equitable, and accessible for all. Our vision has evolved to redefine the future of financial transactions.We are a dynamic movement empowering millions, driven by a collective mission to address significant challenges. Our approach is swift, courageous, and collaborative, fostering an environment where innovation thrives.Joining the Core Team means engaging with essential systems that manage interactions with external banks, orchestrate payments, and create the foundational infrastructure for Identity and Access Management (IAM). This team also oversees critical risk management functions, including credit risk assessment and fraud detection.If you’re eager to craft impactful solutions that serve as the bedrock for our product teams, you’ve found the right place.Your RoleAs a Senior Backend Software Engineer within the Core Team, you will be pivotal in developing the backbone of our payment platform. You will ensure the technical excellence and timely delivery of complex systems that influence multiple services and product teams throughout the organization.Your daily responsibilities will include:Engineering Core Platform Domains: You will help design and evolve our most sensitive systems including the Transaction Ledger, IAM, and Payment Orchestration, ensuring they remain high-performing, scalable, and functional for product team integration.Scaling Risk & Financial Engines: You will optimize and develop services dedicated to bank integrations, credit risk, and real-time fraud detection, constructing robust logic to safeguard our financial ecosystem.Cross-Team Technical Leadership: You will lead technical analyses for projects that span multiple services, facilitating discussions and producing comprehensive documentation (Smart Papers) to ensure clarity and robustness in your designs.Collaborative Development: Engage actively with product teams to refine requirements and enhance the overall system architecture.

Grafana Labs stands at the forefront of open-source innovation, with a community of over 20 million users utilizing our visualization tool to monitor everything from environmental changes to critical business metrics. Our iconic dashboards have been featured in prestigious venues, including NASA launches and the Tour de France. With over 3,000 companies, including Bloomberg and eBay, relying on the Grafana LGTM Stack for their observability strategies, we empower organizations to effectively manage their data through Grafana Cloud or Grafana Enterprise solutions.As we continue to grow rapidly, we remain committed to our core values: a rich open-source heritage, a collaborative global culture, and a dedication to impactful work. Our team flourishes in an environment driven by innovation, transparency, autonomy, and trust.If this role excites you, even if you don't meet every requirement, we encourage you to apply and explore this potentially transformative career opportunity.Senior Backend Engineer - AlertingThis is a remote opportunity, and we welcome applications from the UK.The Opportunity:The Grafana Alerting team plays a critical role within the Grafana open-source project, aiming to provide users with comprehensive alert management capabilities. Our backend-focused engineers collaborate closely with clients and the Grafana Cloud teams to ensure alerts operate seamlessly both on-premises and in the cloud at scale.Our projects span a wide domain, showcasing our work on:Creating distributed systems to enhance the ingestion and delivery of Prometheus-based alerts.Integrating alerting setups for consistent operation across Grafana and Prometheus alerts.Developing robust systems to handle Grafana-managed alerts with over 500 evaluations per second in production.Grafana Alerting is trusted by major organizations globally, monitoring vital medical devices and critical infrastructure.

At Databricks, we are driven by a passion for empowering data teams to tackle some of the world's most challenging problems—whether it's revolutionizing transportation or accelerating medical advancements. Our mission is to build and operate the premier data and AI infrastructure platform, enabling our clients to harness deep data insights to enhance their businesses.Founded by engineers and deeply committed to our customers, we eagerly embrace every opportunity to confront technical challenges. From designing next-gen UI/UX for data interfaces to scaling our services and infrastructure across millions of virtual machines, we are just getting started.As part of our ongoing commitment, we are embarking on a multi-year journey to develop the best Lakehouse Platform. While we are building on a solid foundation, our aim is to create significantly improved products. This involves re-evaluating every component to deliver our customers the fastest, easiest to use, and most secure data platform for all their data workloads.As a Software Engineer, you will play a vital role as a founding member of our London site and the core team in our journey towards achieving the Lakehouse vision. You will be engaged in the complete development lifecycle and will embody the core values that define Databricks.Your Impact:Our backend teams tackle diverse challenges across essential service platforms. You may work on:Complex problems that encompass product and infrastructure components, including distributed systems, scalable service architecture, monitoring, workflow orchestration, and enhancing developer experience.Developing reliable, secure, and high-performance services and client libraries for managing vast amounts of data on cloud storage backends such as AWS S3, GCS, and Azure Blob Store.Creating product features that empower our customers to seamlessly store and access their data.Addressing reliability issues related to Lakebase.Proactively identifying downtime causes and systematically eliminating root issues.Assisting the organization in defining SLIs, achieving SLOs, and driving long-term reliability improvements.

InfoSum stands at the forefront of data collaboration, providing an innovative platform that allows the world’s largest enterprises to harness the power of data while ensuring consumer privacy. Our mission is to unlock the vast potential of data by connecting it without compromising its integrity. Following our successful Series B funding round of $65 million in 2021, we are dedicated to investing in our talented workforce and expanding our teams.As a people-centric organization, we prioritize personal and professional flexibility, empowering our employees to thrive as we collectively challenge the status quo. If you seek a collaborative workplace that champions the idea that the whole is greater than the sum of its parts, we would love to hear from you.About YouWe are looking for an accomplished Senior Backend Engineer with a robust skill set focused on backend technologies. A strong proficiency in Golang is preferred; however, a diverse background in various backend languages, including some exposure to Go, may also be a great fit. You will play a crucial role in creating, enhancing, and perfecting systems within a microservices architecture, contributing to a complex platform that will evolve with new solutions and features through 2025 and beyond.We value aptitude over mere knowledge, although we would like to see prior experience in tackling large, complex challenges in application development. We seek individuals who can add value in multiple ways and thrive in collaborative environments. You should be comfortable working within smaller, focused teams while being capable of addressing any challenges that may arise.The ideal candidate will have a strong focus on customer-centric solutions, a genuine passion for problem-solving, coding, and a willingness to embrace challenges. An interest in Data Science is a plus but not mandatory. Experience within agile teams and CI/CD environments is advantageous.RequirementsAs part of a talented and motivated team delivering cutting-edge software services and products built on patented database technology, you should possess at least 7 years of professional software development experience, particularly in Backend engineering.We expect you to be well-versed in our backend tech stack, which currently includes a microservice architecture utilizing:GoProtobufgRPCPostgreSQLRedisKafkaDockerFully automated deployments with Kubernetes and Ansible across multiple cloud providersWe are committed to leveraging the best technology for every task. Additional technologies employed within our wider team include TypeScript, NodeJS, and React. A DevOps approach is essential, with the development team expected to monitor and debug their code effectively.

About UsAt Heidi, we are pioneering an AI Care Partner that assists healthcare professionals at every stage, from documentation to patient care delivery. Our mission is to enhance healthcare capacity while maintaining a deeply human touch. In just 18 months, we have reclaimed over 18 million hours for clinicians and facilitated more than 73 million patient visits. Currently, Heidi powers over two million patient interactions weekly across 116 countries in more than 110 languages.Founded by healthcare professionals, Heidi unites clinicians, engineers, designers, scientists, creatives, and mathematicians, all dedicated to enhancing the human connection central to healthcare. With nearly $100 million in funding, we are expanding our reach in the USA, UK, Canada, and Europe, collaborating with major health systems, including the NHS and Beth Israel Lahey Health, among others.We are agile in our approach, focused on what works, and poised to shape the future of healthcare. Are you ready to take on this challenge?Your RoleAs a Senior Backend Engineer, you will be instrumental in executing backend features, leveraging your deep technical understanding to meet user requirements. You will thrive in a hyper-growth startup environment, with substantial experience in building SaaS products.With a solid grasp of the challenges engineers face, you will prioritize key features and capabilities through effective design principles. Your ability to bridge technical specifics with business needs will enable you to transform high-level concepts into practical solutions.Embracing challenging scenarios, you will appreciate the dynamics of a flexible, flat-structured work environment and quickly navigate the complexities of developing AI healthcare products on an international scale. We believe that exceptional talent can emerge from diverse backgrounds; if you have a proven history of delivering technically demanding products and features, we want to hear from you.

At Abnormal AI, we are dedicated to safeguarding our clients from evolving threats posed by malicious actors who continuously adapt their strategies to exploit weaknesses in traditional security measures. Recognized as a leading cybersecurity startup, Abnormal AI holds the distinction of being a leader in the 2025 Gartner Magic Quadrant for Email Security Platforms, having secured $250 million in Series D funding at a valuation of $5.1 billion in August 2024. About The Team The team is tasked with the complete ownership, development, and operation of the underlying infrastructure, machine learning models, customer-facing APIs, and internal tools that power Abnormal's Account Takeover (ATO) protection solution. This product is essential for identifying malicious activities and protecting customers against account theft. About The Role We are in search of a Senior Software Engineer to spearhead the delivery and technical design of complex features within our ATO platform. This critical position entails the evolution of the platform to accommodate expanding product demands. The ideal candidate will engage in hands-on backend development, oversee production operations, manage stakeholder relationships, and provide mentorship to team members. The primary objective is to strengthen system reliability, minimize latency, and expedite feature release cycles. What You’ll Do Technical Delivery & Excellence Design, develop, and enhance scalable backend and machine learning systems, APIs, frameworks, and internal tools. Take ownership of end-to-end delivery of intricate features that directly enhance customer experience. Ensure the stability, reliability, and operational excellence of critical systems. Produce clean, testable, and resilient code while considering edge cases and performance metrics. Draft and review technical design documents, influencing their adoption across the engineering team. Participate in code and design reviews and contribute to the on-call support rotation. Leadership & Collaboration Work collaboratively with product managers, designers, and engineers to synchronize specifications and project priorities. Decompose complex projects into actionable steps and drive their successful completion. Actively engage in roadmap discussions and propose long-term technical strategies. Communicate effectively in an asynchronous environment, providing clarity on updates, challenges, and solutions. Mentor colleagues, share insights, and influence engineering methodologies within the team.

Join Palantir Technologies as a Senior Backend Software Engineer focused on Infrastructure. In this crucial role, you will design and implement robust backend systems that power our cutting-edge software solutions. Collaborate with a talented team to develop scalable and efficient solutions that meet the needs of our clients.

Join Palantir Technologies as a Senior Backend Software Engineer and contribute to our innovative application development team. You will design and implement robust backend systems that are scalable and efficient, working alongside talented engineers in a collaborative environment.

Join InfoSum, the premier data collaboration platform that empowers the world’s largest enterprises to connect their data sources while prioritizing consumer privacy. Our mission is to unlock the boundless potential of data, ensuring that it can be connected without being shared. As a people-centric organization, we provide the flexibility needed for you to excel, grow, and innovate within our team. If you seek a collaborative environment that values each individual’s contribution, we would love to connect with you.The Engineering team at InfoSum is committed to delivering high-quality, innovative software solutions tailored to our customers’ needs, contributing to the overall success of our organization. We utilize cutting-edge technologies, adhere to best practices, and foster teamwork to create scalable, reliable, and user-friendly software products.Job Overview:As a Backend Software Engineer, you will play a crucial role in designing, developing, and maintaining the backend systems that drive our software applications. Collaborating with cross-functional teams, you will translate business requirements into technical specifications, delivering robust and scalable backend solutions. This position is ideal for individuals passionate about backend development and eager to tackle innovative challenges.Core Responsibilities:System Design and Architecture: Create scalable, high-performance backend systems that support our software applications. Work alongside stakeholders to comprehend requirements and define technical solutions that align with business objectives.Backend Development: Write clean, efficient, and maintainable code primarily in Go, with familiarity in Python and/or Java as a plus. Implement backend services, APIs, and data processing pipelines following best practices and design patterns.Database Design and Optimization: Design and enhance database schemas, queries, and indexing strategies for optimal performance and scalability, particularly with relational databases like PostgreSQL.Integration and Interoperability: Seamlessly integrate backend systems with third-party services and external APIs, ensuring compatibility and consistency across system components.Quality Assurance: Implement automated testing methodologies to uphold the quality and reliability of backend systems. Collaborate with QA engineers to devise test plans, execute test cases, and resolve defects promptly.Performance Optimization: Identify and mitigate performance bottlenecks in backend systems through profiling, tuning, and optimization techniques to support high traffic and user interactions.

Join Duffel as a Backend Software Engineer and play a pivotal role in shaping the future of travel technology. We are seeking passionate individuals who thrive on solving complex challenges and are excited about creating scalable and efficient backend systems.

Join Contentful as a Senior Backend & Infrastructure Software Engineer and play a pivotal role in shaping the future of our platform. In this role, you will design and implement robust backend solutions that enhance our infrastructure capabilities, ensuring scalability and performance. Collaborate with cross-functional teams to tackle complex technical challenges and drive innovation within the organization.

About RemoteAt Remote, we are tackling one of the most significant challenges faced by modern organizations: ensuring compliant global employment. Our platform empowers businesses of all sizes to easily hire, pay, and manage international teams. With a culture rooted in our core values and a forward-thinking approach, our diverse team works diligently on innovative solutions asynchronously from around the globe. Remote team members are spread across six continents, and all positions are fully remote.Innovation is at the heart of what we do, and we integrate Automation and AI into every role's requirements.We encourage every member of our team to contribute their unique skills, experiences, and cultural insights to help us create a world-class HR platform. If you are enthusiastic, inquisitive, driven, and ambitious, we invite you to join us in defining the future of work. Apply now!The PositionYou will be a vital part of our engineering team, collaborating with experts from Frontend, Backend, SRE, and QA. Our teams are organized into cross-functional units, focusing on specific verticals.This opportunity spans multiple teams, and the exact team assignment will be determined during the interview process based on your preferences and organizational needs.Regardless of which team you join, you will contribute to developing tools, APIs, and integrations for one of our products.Our backend technology stack includes Elixir and Phoenix, supported by a Postgres database. The frontend utilizes React and Next.js, with GitLab serving as our version control, issue tracking, and CI/CD solution. Our applications are hosted on AWS, and we deploy multiple times a day using CI.What We OfferEngaging and significant challenges — your solutions will enable individuals and businesses to operate globally.The chance to make a substantial impact — as an early-stage company, your contributions will directly influence our growth and trajectory.

About the Opportunity Are you a driven Senior Software Engineer with a passion for backend development? Join Veza's innovative Graph team and be instrumental in designing, enhancing, and sustaining our scalable code that powers the Veza Access Graph. In this role, you will collaborate with diverse teams to shape the future of our products, delivering top-notch identity and access management solutions for our clients. This is an exceptional chance to make a significant impact in a high-growth startup while working with state-of-the-art technologies! Your Responsibilities: Create, maintain, and scale Graph features that enable actionable customer intelligence across a variety of products. Enhance the performance, scalability, and reliability of the backend services and APIs that underpin our platform. Work alongside product managers, fellow engineers, and security professionals to develop product features that align with business goals and adhere to security protocols. Continuously refine your work through code and design reviews, testing, and refactoring. Implement logging, monitoring, and auditing features to ensure compliance with regulatory requirements and maintain operational health metrics. Keep abreast of industry trends and emerging technologies to foster innovation and enhance our platform.

Who We AreAddepar is a pioneering global data and AI platform that empowers investment professionals to transform complex financial information into actionable insights. Our platform integrates portfolio, market, and client data into a comprehensive portfolio view, unlocking AI-driven insights within investment and client workflows. With over 1,400 firms across nearly 60 countries managing nearly $9 trillion in assets through our platform, we are at the forefront of modern financial technology. Our open platform collaborates seamlessly with approximately 650 software, data, and consulting partners, enhancing investment operations for firms of all sizes and complexities. Addepar serves clients globally, with offices in major cities including New York City, Salt Lake City, London, Edinburgh, Pune, Dubai, Geneva, and São Paulo.The RoleThe Investor Solutions team at Addepar is expanding!Navigator, our quantitative liquidity risk projection tool, is a cornerstone of Addepar's multi-product ecosystem. Since its acquisition in 2021, we have significantly invested in this crucial product, surpassing our initial multi-million ARR goals. As we look toward 2026, Navigator will serve as the foundation for key workflows tailored to large institutions, further integrating into the Addepar ecosystem.As we continue to grow, we are seeking a Senior Backend Software Engineer to leverage their expertise within our Engineering team, presenting exciting opportunities for long-term role expansion as our product evolves and enters new global markets.Please note that applicants must have the right to work in the United Kingdom from day one, as visa sponsorship is not available for this position.

At Feeld, we are on a mission to foster deeper connections between individuals and enhance their understanding of themselves and their relationships. Our focus is on developing an inclusive, human-centered product, and we are seeking a Senior Backend Engineer specializing in Monetization to join our fully remote team. This role is pivotal in advancing our vision of enhancing the human experience of sexuality and relationships.In this position, you will be tasked with creating, managing, and optimizing scalable and secure backend systems that are crucial for our revenue-generating activities. Your work will ensure that our monetization processes are dependable, compliant, and capable of performing efficiently at scale.Key Responsibilities:Champion results by taking ownership of the monetization funnel's health, ensuring the reliability and performance of the systems that sustain Feeld's operations.Design and uphold scalable backend systems that integrate subscriptions, billing, entitlements, pricing strategies, and promotional mechanisms as our user base expands.Guarantee high reliability and accuracy of monetization processes, minimizing incidents that affect revenue while improving detection and resolution times.Facilitate rapid experimentation by implementing feature flags, testing options, and analytics integration across monetization systems.Collaborate with the Data team to develop and maintain analytics and reporting tools that provide insights into revenue performance, user behavior, and system health.Professional Growth Opportunities:Enhance your expertise in the design and operation of revenue-critical systems at scale.Gain advanced skills in system observability, monitoring, and incident response for high-throughput financial workloads.Broaden your knowledge of analytics infrastructure, experimentation frameworks, and data-driven product development.Refine your collaboration skills with non-technical stakeholders by translating complex technical concepts into actionable business insights.