Senior Backend Software Engineer at InfoSum | Basingstoke, England

Join InfoSum, the world’s premier data collaboration platform, where we empower leading enterprises to collaborate across data sources while prioritizing consumer privacy. Our mission is to unleash the endless potential of data by connecting it without compromising on privacy. As a people-centric organization, we offer the flexibility necessary for you to ex…

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.

Join Socure as a Backend Engineer for RiskOS, where you'll play a pivotal role in enhancing our risk management platform. Collaborate with cross-functional teams to design, develop, and implement backend solutions that drive efficiency and scalability.

Role overview airapps is hiring a Backend Engineer for its London Metropolitan Area team. This role focuses on designing and building scalable server-side applications that support the company’s products and services. What you will do Work closely with colleagues across different functions to develop backend systems Contribute to the architecture and implementation of server-side features Help ensure backend solutions can scale and perform reliably Location This position is based in the London Metropolitan Area.

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.

Application Deadline: We are actively conducting interviews and are eager to fill this role as soon as we find the right candidate.ABOUT THE OPPORTUNITYWe are in search of talented Backend Software Engineers who are passionate about developing tools that enhance frontier AGI safety research. This includes creating and maintaining evaluation libraries and tools that enable monitoring and control of our LLM traffic.REPRESENTATIVE PROJECTSAs part of your role, you may work on the following projects within your first six months:Internal tools for efficient running and analysis of evaluations, such as a system that investigates thousands of agentic evaluation runs in parallel and automatically surfaces insights.Automated evaluation pipelines designed to streamline the process from accessing a new model for pre-deployment testing to analyzing key results and disseminating them.Orchestration tools enabling researchers to execute thousands of agentic evaluations in parallel on secure remote machines.LLM proxy services that allow real-time monitoring of our coding agent traffic, supporting automatic identification of undesired behaviors.Development of LLM agents and MCP tools that automate internal software engineering and research tasks, with safeguards to prevent significant failures.Continuous Integration (CI) pipeline optimizations to enhance execution speed and eliminate unreliable tests.Telemetry API and enhanced instrumentation of existing tools to monitor usage and improve reliability.A data warehousing pipeline to store thousands of evaluation transcripts for research and dataset building.Improvements to the Inspect framework and ecosystem, including support for modern agentic scaffolds.

Why Join Midnite?Midnite is an innovative sports betting and gaming platform designed for the next generation of players. We blend strategic product development, a bold brand identity, and rapid execution to deliver experiences that are modern, intuitive, and tailored for today’s gaming preferences.With over 400,000 players already on board, we are just beginning our journey.Our team is high-performing, dynamic, and values ownership and agility. We embrace constant iteration, reject unnecessary processes, and swiftly transform ambitious ideas into tangible results. If you're motivated, inventive, and excel in fast-paced environments where you can make a significant impact, we want to hear from you.Join us as we redefine the gaming experience! Role OverviewAs a Senior Backend Engineer on our Casino UX team, you will be responsible for constructing and sustaining the backend systems that enhance our casino platform. Your role will involve developing APIs to support our mobile and web applications while ensuring that you produce robust, maintainable code in an environment that deploys daily.Our backend technology stack is primarily Python-based and operates on AWS, utilizing tools such as Flask, Pytest, Mypy, Docker, PostgreSQL, SQS, S3, and Terraform. Familiarity with this stack is advantageous but not mandatory; what’s most important is a solid understanding of backend fundamentals and a commitment to engineering excellence.No prior gaming or casino experience is necessary. We are seeking individuals with strong technical foundations and a willingness to learn and grow in this sector.Your Responsibilities:Full Backend Lifecycle Management: Design, develop, test, monitor, and maintain backend services for our casino platform.API Development: Create clean, efficient, and well-documented APIs for our web and mobile applications.Code Quality Advocacy: Write high-quality, maintainable code with an emphasis on reliability, scalability, and performance.Engineering Standards Enhancement: Engage in code reviews to uphold the quality and consistency of our codebase.Technical Direction Influence: Contribute to architectural decisions and technical strategies.Cross-Team Collaboration: Work closely with engineers, product teams, and external partners to integrate third-party systems effectively.Rapid Feature Delivery: Deploy features and enhancements in a continuous deployment environment.Innovation Leadership: Help us stay ahead of industry trends and technologies.

Join our innovative team at weekday-1 as a Backend Engineer. In this role, you will be responsible for designing, developing, and maintaining the server-side components of our applications. Your expertise will help ensure that our systems are scalable, reliable, and efficient.You will collaborate with frontend developers to integrate user-facing elements with server-side logic. Additionally, you will troubleshoot and optimize our backend processes to enhance performance.

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.

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 ARQARQ stands at the forefront of the fintech revolution, striving to transform the way individuals and businesses interact with money globally. Our vision is to create an unparalleled infrastructure that facilitates seamless value exchange across borders. As we embark on this exciting journey, every new team member plays a pivotal role in shaping our product, culture, and future growth. If you are passionate about tackling significant challenges and making a global impact while advancing your career alongside a world-class team, ARQ is your ideal destination.What We're SeekingWe are in search of a skilled Backend Engineer who will be responsible for designing, developing, and maintaining robust, scalable backend systems that underpin our innovative products. You will collaborate with a dynamic team to devise solutions that enhance financial inclusion and revolutionize money management.Your ResponsibilitiesFocus on greenfield development and improving existing systems.Engage in projects such as building REST APIs, engineering microservices, and enhancing critical systems including card payments, treasury management, transaction booking, and crypto liquidity.Utilize our technology stack, primarily based on Java 25 and PostgreSQL.Employ Spring Boot for swift and high-quality delivery.Adopt a pragmatic approach to developing business logic with a focus on clean code, maintainability, and rapid delivery utilizing TDD, DDD, continuous integration, and continuous delivery.Qualifications RequiredProven experience in backend development, with proficiency in Java.Bachelor's Degree or higher in Computer Science, Mathematics, Physics, or related Engineering/Science disciplines.A quick learner with a driven, results-oriented mindset and excellent communication skills (fluent in English, both verbal and written).A track record of developing complex products utilized by millions in high-growth startup environments.BenefitsCompetitive salary package.Sign-on stock options bonus, allowing you to share in the company’s success.Discretionary performance bonuses (in stock options).Paid annual leave.Ownership of the development process with a direct impact on customer experience.Access to the latest technologies.

As a Senior Backend Developer specializing in Ruby on Rails, you will play a pivotal role in architecting, developing, and validating server-side logic for web applications. Your expertise will be essential in crafting efficient, reusable, and robust Ruby code, while optimizing systems for peak performance and scalability. You will work collaboratively within cross-functional teams, integrating front-end components into our applications. Your responsibilities will also include conducting code reviews, mentoring junior developers, and converting business requirements into effective technical solutions.The ideal candidate will possess a Bachelor's or Master's degree in a related discipline, along with a minimum of eight years of hands-on experience in Ruby on Rails development. You should be well-versed in various software testing methodologies, demonstrate strong analytical skills, and have excellent proficiency in English.

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.

Join our dynamic team at pod-network as a Backend Engineer, where you will play a crucial role in developing and maintaining our cutting-edge backend systems. We are looking for a passionate engineer who thrives in a collaborative environment and is eager to contribute to innovative projects.

Join Capco as a Backend Developer specializing in Java, where you'll play a crucial role in developing and maintaining scalable backend solutions for our diverse clientele. You will be part of a dynamic team that values innovation, collaboration, and continuous improvement.

Join our innovative team at reteam as a Backend Engineer! In this role, you will collaborate with cross-functional teams to develop robust backend solutions that power our applications.We are looking for an enthusiastic engineer who is passionate about creating efficient and scalable systems. Your expertise will contribute to enhancing our product offerings and improving user experiences.

Join ReTeam as a Backend Engineer in a fully remote capacity! We are seeking a skilled engineer who is passionate about developing robust and scalable server-side applications. As part of our dynamic team, you will collaborate with front-end developers and other engineers to enhance our product offerings and ensure seamless integration between user-facing elements and server-side logic.

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.

We are seeking a passionate and skilled Backend Developer to join our dynamic team at Radius Telematics. This pivotal role is crucial to our continued growth and success in the vehicle telematics industry.As a Backend Developer with expertise in TypeScript and NodeJS, you will have the opportunity to contribute to the development and maintenance of our complex multi-environment SaaS product, which consists of over 70 Git repositories. You will work with a modern microservice backend deployed on AWS, utilizing technologies such as Docker and Terraform within our automated CI/CD pipelines.Telematics is a rapidly expanding sector for us, offering you the chance to enhance your skills and advance your career. We value teamwork and are looking for someone who can combine technical excellence with practical execution to navigate today’s challenges effectively. Our Agile work environment encourages ownership and a proactive approach to problem-solving.Your Responsibilities:Design, build, and maintain scalable, secure backend systems using NodeJS and TypeScript.Collaborate closely with cross-functional teams to achieve project goals.Proactively address critical challenges during high-pressure situations.What We Need From You:Proven experience as a Backend Developer with NodeJS and TypeScript.Strong critical thinking and problem-solving abilities.Experience working in an Agile environment and delivering features rapidly.Initiative: You identify what needs to be done and take action without waiting for direction.Resilience: Challenges energize you rather than deter you.Team-oriented: You effectively collaborate while taking responsibility for your individual contributions.What We Offer:Your contributions will be recognized with opportunities for career development and progression. You will also enjoy a competitive rewards and benefits package, including:Pension schemeLife insuranceEmployee fuel card schemeElectric vehicle schemeEmployee assistance programWellness and healthcare support via ‘Help@Hand’ by UnumCycle to work schemeComplimentary breakfast in the office

Join Superis Labs in our mission to create a high-performance perpetual futures decentralized exchange (DEX) built on the Solana blockchain. As we develop our first production MVP, you will play a critical role in shaping the core architecture and protocol design of our innovative platform.Superis Labs is proudly supported by Ergonia, a leading market-making firm and venture builder with extensive expertise in trading and development on the Solana network. In this dynamic environment, we are rapidly iterating from a minimal core towards a fully-featured mainnet exchange. This position offers significant ownership and the opportunity to build production systems under tight deadlines.Key Responsibilities:Develop core exchange functionalities including markets, user management, collateral handling, fee structures, and order routing.Implement robust liquidity sources, on-chain matching, margining, liquidation, and risk enforcement mechanisms.Contribute to the design of the comprehensive architecture for the perpetuals exchange.Ensure seamless operation of on-chain and off-chain systems as a unified, low-latency stack.Optimize systems for performance, latency, and computational efficiency.Create thorough testing protocols and maintain clear, up-to-date documentation.Enhance developer tools and improve onboarding processes.Design, implement, and deploy production-level Solana smart contracts using Rust.