Backend Engineer at Junior | London

About JuniorAt Junior, we are on a mission to revolutionize the investment research landscape with innovative LLM-powered tools designed specifically for private market investors. Our clientele includes some of the world's leading private equity and consulting firms, collectively managing billions in annual investments. As a profitable and bootstrapped enterprise, we have grown our team to 24 talented individuals across our London and NYC offices, and we achieved a remarkable 10x revenue growth in 2025.Discover more about our mission and values here. Role DescriptionAs our first dedicated Backend Engineer focused solely on our internal go-to-market and operations stack, you will play a pivotal role in shaping our technology framework. Your responsibilities will include:Crafting an AI-first tech stack from the ground up, influencing infrastructure decisions and priorities.Rapidly deploying internal tools and receiving immediate feedback from your team members, who will quickly become your strongest advocates!Developing and managing our data warehouse and internal data architecture.Engaging in innovative projects that leverage LLMs, automation, and advanced agent technologies.Cultivating our engineering culture. Sample Set of ProjectsUser Health Reporting + CRM Data Quality: Automate data pipelines to enhance metrics visibility in BI dashboards and ML evaluations, while establishing alert systems for risk signals.User Feedback Integration: Develop a tool that summarizes user feedback calls, prioritizes feature requests, and communicates findings to our Product team.Billing and Invoicing: Implement complex B2B pricing models encompassing usage-based, seat-based, and platform fees, while automating financial reconciliation processes.Data Warehouse Development: Create a data warehouse to integrate product, CRM, and operational data, and generate tailored dashboards for different teams. About YouWe are searching for a backend/data engineer who...

Join Axon, a leader in innovative technology solutions, as a Junior Software Engineer. In this entry-level position, you will have the opportunity to work with a talented team of engineers to develop and enhance software applications that empower law enforcement and public safety agencies worldwide.Your role will involve coding, debugging, and collaborating with cross-functional teams to deliver impactful solutions. This is an exciting opportunity to kick-start your career in software development while making a difference in communities.

Join Our TeamAs a Junior Software Engineer specializing in Data Products at Yapily, you will be instrumental in developing and expanding our cutting-edge data platform. This entry-level role is ideal for individuals with a solid foundation in Java or Python who are enthusiastic about diving into the field of Data Engineering.Your contributions will be vital in crafting high-performance data pipelines, robust billing infrastructure, and intuitive self-service data APIs. This position provides a unique opportunity to engage with the Google Cloud Platform (GCP) stack, allowing you to learn how to create data systems that enable engineering teams to transform raw data into actionable insights.Key ResponsibilitiesData Pipeline Support: Collaborate in the design and upkeep of scalable data ingestion and processing systems using ETL/ELT methodologies.API Development: Assist in the creation and documentation of APIs for a seamless data experience for various stakeholders.Database Management: Work with SQL and NoSQL databases, optimizing schemas and crafting efficient queries to handle high-volume transactions.Cloud Resource Management: Learn to deploy and maintain software utilizing GCP services such as Pub/Sub, BigQuery, and Cloud Storage.Billing Infrastructure: Support the development of a reliable billing architecture in an event-driven environment.Cross-Functional Collaboration: Work alongside BI, infrastructure, and product teams to gather data requirements and deliver technical solutions.Quality Assurance: Engage in testing, monitoring, and logging to ensure system resilience.Continuous Learning: Participate in code reviews and agile ceremonies to enhance your technical skills and product knowledge.

About HomeyHomey is revolutionizing the notoriously slow and stressful process of moving home in the UK. As an established yet fast-growing company, we leverage cutting-edge technology to make property transactions quicker, more transparent, and efficient for all parties involved.Discover more at Homey.co.uk.The RoleWe are not seeking years of legacy experience; instead, we are in search of smart, adaptable, and ambitious engineers. Whether you are a recent graduate, a school leaver, or just starting your coding journey, we want to hear from you.At Homey, we value the ability to rapidly build solutions over memorizing every syntax rule. We are interested in "AI-Native" engineers—those who utilize LLMs, such as Claude Code, Grok, or GitHub Copilot, to enhance their coding capabilities and deliver high-quality code swiftly.ResponsibilitiesBuild & Iterate: Develop and enhance features that significantly influence the home buying and selling process.Leverage AI: Harness modern AI coding tools and LLMs to streamline your workflow, troubleshoot complex issues, and innovate new solutions.Problem Solve: Adopt a proactive approach to tasks from day one, demonstrating a "can-do" attitude—if you face a challenge, you will seek out the solution.Collaborate: Engage closely with a dynamic team that appreciates fresh perspectives and creative problem-solving.Who You AreEarly Career: You are a recent graduate, school leaver, or junior developer eager to grow.Tech Enthusiast: You actively use AI tools like Claude Code, Grok, or Cursorto enhance your projects.High Energy: You possess a "can-do" mindset where every task is important, and no challenge is insurmountable.Curious: You have a keen interest in how technology can transform traditional industries like real estate.BenefitsJoin an established company with the innovative spirit of a startup.Receive mentorship from experienced founders who embrace modern development practices.Contribute to solving a real-world problem affecting millions.Are you ready to shape the future of property transactions? Apply now with a link to your GitHub, a project you’ve developed using AI, or a brief note on why you are the ideal candidate for Homey.

About JuniorAt Junior, we are at the forefront of innovation, developing advanced LLM-powered workflow tools designed to enhance investment research for private market investors. Our esteemed clientele includes the majority of the top 10 global private equity and consulting firms, and we currently facilitate the investment of hundreds of billions of dollars annually. As a profitable and bootstrapped company, we are proud to have a dynamic team of over 30 professionals based in London, New York City, and Sydney, achieving a remarkable 10x revenue growth in 2025.Explore more about our mission and values here. Role OverviewWe are searching for our inaugural Product Marketing Lead to define our positioning, messaging, and marketing strategies for Junior, targeting the world's most discerning enterprise software buyers. You will act as a vital link connecting our state-of-the-art AI product with decision-makers at prestigious consulting firms and private equity funds.In this pioneering role, you will have the chance to:Lead product launches and messaging for feature releases: Ensure new features are effectively communicated to the right audience, helping users maximize their value from Junior.Develop our content strategy: Create engaging case studies, thought leadership articles, and sales enablement resources that demonstrate tangible ROI.Shape our go-to-market strategy: Develop impactful messaging that stands out in the crowded AI landscape and resonates with sophisticated buyers by deeply understanding customer segments, market dynamics, and decision-making personas. About YouWe are looking for a strategic product marketer who possesses:5+ years of B2B product marketing experience, ideally within enterprise software, AI/ML platforms, or technology services.A deep understanding of complex sales cycles, with experience engaging sophisticated buyers who navigate 3-9 month decision-making processes involving multiple stakeholders.Fluency in AI/LLM products, with the ability to articulate the technological shifts we are experiencing and create compelling messaging around customer use cases.A tinkerer’s mindset: Experimentation with LLMs and AI tools, showcasing several examples of processes developed or improved through generative AI.

At OakNorth, we are dedicated to empowering the UK's most ambitious enterprises. Since our inception in 2015, we have successfully lent over $21 billion across the UK and the US, contributing to the creation of more than 58,000 new homes and 36,000 jobs, while supporting hundreds of thousands of personal savers and bolstering the UK economy.We are on the lookout for Junior Software Engineers, particularly recent Computer Science graduates or those in the early stages of their development careers. You will become a part of our innovative AI-native engineering team, where small, highly autonomous pods operate in a groundbreaking manner. Alongside your peers, you will engage in the complete product development lifecycle—designing, building, testing, and deploying—within a highly independent team structure.This initiative represents a pivotal shift in our development practices at OakNorth, placing you at the forefront of technological innovation.Your role will involve pushing the boundaries of modern AI tools and transforming those capabilities into effective systems utilized by real teams. We are seeking curious creators—individuals who naturally test, compare, break, rebuild, and optimize. Your contributions will be instrumental in shaping the AI-native engineering culture within the bank, with a strong emphasis on execution: rapid prototyping, deployment, and measurable impact.

Join trainline as a Junior .NET Engineer and embark on an exciting journey in the tech industry! As part of our dynamic development team, you will have the opportunity to contribute to innovative projects that enhance our platform's performance and user experience.Your role will involve collaborating with experienced engineers, gaining hands-on experience in software development, and applying best practices in coding and design. If you are eager to learn and grow in a fast-paced environment, this position is perfect for you!

Fraud Alert:Beware of scammers creating fake job listings on other platforms. To ensure your application is considered, please submit your application exclusively through Sensor Tower's official website or through postings directly associated with Sensor Tower on platforms like LinkedIn, Indeed, BuiltIn, or Hackajob. Sensor Tower will never request payment, credit card, or bank account details as part of the application process. All official communications from Sensor Tower will come from email addresses ending in sensortower.com. Interviews will be conducted via phone or Zoom, and we will not transition to other email services or texts. If you encounter any issues, please reach out to us. Remember to attach your resume when applying.Notice to Recruitment Agencies:Sensor Tower does not accept unsolicited resumes from third-party agencies. Please refrain from sending resumes to our job alias, Sensor Tower employees, or any other company location. We will not be liable for any fees related to unsolicited resumes and will not pay any agency or company without a signed agreement.About This Role:Are you passionate about developing products that leverage real-world, large-scale data? At Sensor Tower, we process vast amounts of data to provide insights for thousands of customers. We are seeking enthusiastic, early-career engineers eager to enhance their skills while collaborating with us to create fast, reliable systems that simplify data access and understanding.You will collaborate closely with seasoned engineers, contribute to impactful features from day one, and gain insights into the design, construction, and optimization of large-scale systems in a production environment.If you thrive on learning, problem-solving, and delivering real software that users depend on, we would love to hear from you. We have a strong history of rapidly advancing talented juniors, and this position offers a unique opportunity to work closely with senior leadership.Our Engineering Culture:We believe that "Simplicity is a prerequisite for reliability." We seek engineers who resonate with our core values:- Simplicity: We avoid unnecessary complexity, favoring existing tools and straightforward solutions over trendy new technologies.- Quality: We write code that is enjoyable to read, understanding that code is often read more than it is written. We do not cut corners and strive for high standards before deployment.

Join our dynamic team at Trainline as a Junior Ruby Engineer! This is an exciting opportunity for those looking to kickstart their career in software development. You will collaborate with a talented group of engineers to design, develop, and maintain innovative applications that streamline travel for millions of users.As part of our London-based team, you will be immersed in a culture of learning and growth, where your contributions will have a real impact on our products and services. We are looking for a passionate individual who thrives in a collaborative environment and is eager to learn from experienced developers.

Our MissionAt Omnea, we are transforming the way enterprise businesses function, focusing on the most challenging aspects: procurement. Here, a single purchase can extend for months, entail over 50 emails, and involve multiple departments such as Finance, Legal, Security, and IT just for approval.With an investment of $75M from Khosla Ventures, Insight Partners, and Accel, we aim to revolutionize this process. Our AI-driven platform integrates all stakeholders, ensuring that buying is swift, secure, and efficient. It offers a centralized location for requests, automated approvals and renewals, real-time supplier risk assessment, and complete visibility into spending.The procurement sector represents a $7B+ untapped market, and our growth underscores the opportunity: we have increased our annual recurring revenue (ARR) tenfold to double-digit millions within just 18 months and gained the trust of large enterprises like Spotify, MongoDB, Monzo, and Albertsons. We are now recognized as the 4th fastest growing startup in Europe.Our team previously scaled Tessian (a leading cybersecurity technology company supported by Sequoia, Balderton, and Accel, acquired after Series C), comprising ex-founders and operators who have successfully grown unicorns, delivered top-tier products, and achieved outstanding execution. You will collaborate with industry leaders including Ben, Abs, Sabrina, and Rebe.What We're Looking ForWe seek talented, product-focused full-stack software engineers to drive Omnea's next growth phase.In the past 18 months, we have accelerated our revenue tenfold, tripled our customer base, and maintained a retention rate exceeding 99% with enterprise clients such as Spotify, Wise, Albertsons, Adecco, and McAfee. Our talent standards are exceptionally high — it took over 10,000 interviews to recruit our first 50 team members. We are now expanding from a low double-digit count to over 200 enterprise clients, aiming for another tenfold increase in revenue in the next 2 to 3 years.This is an exciting opportunity to join us at a pivotal moment: we have achieved product-market fit, yet there is still ample room for you to influence our trajectory.

About JuniorAt Junior, we are at the forefront of innovation, creating powerful LLM-driven tools designed to enhance the investment research experience for private market investors. Our esteemed clientele includes several of the world's top 10 private equity and consulting firms, collectively investing billions of dollars each year. As a profitable, bootstrapped company, we have a thriving team of 28 professionals located in both London and New York City. Notably, we achieved a remarkable 10x revenue growth in 2025. Role OverviewJunior has positioned itself as the premier AI platform for consulting and private equity teams at leading firms globally. Following our 10x growth last year, we aim to triple our success this year.1) Development of GTM Systems (Core)Manage the lead → account → opportunity workflow, focusing on stages, fields, and rules.Automate processes related to routing + hygiene (deduplication, enrichment, stage/task updates).Establish consistent cadences for pipeline reviews, next-step follow-ups, and stale/renewal alerts.Ensure Attio serves as the single source of truth for definitions, naming conventions, and required fields.Create targeted and semi-templated content (such as deal-specific one-pagers and demo workspaces).2) RevOps Processes, Automation & ToolingImplement automations across platforms including Claude Co-work, Attio, Slack, email, and calendar.Oversee legal and information security processes, enhanced by cutting-edge AI tools.Maintain straightforward dashboards tracking inbound speed, conversion rates, outbound pipeline, and pilot health.Conduct monthly operational sweeps to resolve issues, simplify processes, and introduce further automation.3) SDR Execution (Targeted)Engage in prospecting and outbound initiatives targeting our ideal customer profile through Clay, LinkedIn, and Superhuman.Continuously refine high-converting messaging and outreach sequences.Schedule and qualify meetings, ensuring clear next steps are logged in Attio.Develop repeatable outbound strategies (including lists, triggers, and collateral).4) Experiments & Growth OperationsConduct 2–4 GTM experiments per month.Analyze results and convert successful strategies into SOPs and playbooks. About You2-4 years of experience in RevOps, Sales Ops, or Growth Ops.Strong analytical skills with a data-driven approach.Proficiency in automation tools and CRM systems.Excellent communication and interpersonal skills.A proactive mindset with a passion for experimentation and growth.

About JuniorAt Junior, we are revolutionizing the investment research landscape with state-of-the-art LLM-powered tools designed specifically for private market investors. Our clientele includes some of the world's leading private equity and consulting firms, collectively managing billions in annual investments. As a profitable and bootstrapped organization, we take pride in our dynamic team of 24 based in both London and NYC.Discover more about our mission and values here. Role DescriptionAs a pivotal member of our Customer Success team, you will play a crucial role in ensuring our clients' success. We seek individuals who possess genuine empathy for the challenges faced by consultants and investors during due diligence work, and who can effectively demonstrate how Junior can enhance their efficiency and impact.Your responsibilities will include managing global deployments involving thousands of users, acting as the Voice of the Customer, and collaborating closely with our product team to eliminate pain points from our customers' workflows.In this role, you will:Develop and maintain robust relationships with clients, including key decision-makers at large-cap funds and consultancies, serving as their primary contact and trusted advisor throughout the onboarding and feedback processes.Oversee the execution of large-scale AI deployments for thousands of users.Transform customer feedback into actionable insights for product development, guiding our team on essential features to meet client demands.Co-create and deliver tailored training programs alongside our customers.Utilize data-driven strategies to enhance customer engagement, satisfaction, and retention.Advance into a managerial position as our Customer Success team expands.Contribute to the evolution of our team structure and the overall company culture. About YouWe are in search of a seasoned Customer Success Lead who:Has demonstrable experience in customer success roles, especially within the investment or consulting sectors.Is skilled in relationship management, with a track record of engaging effectively with senior stakeholders.Possesses strong analytical skills and the ability to leverage data for customer insights.Can effectively communicate and translate customer needs into product enhancements.Is passionate about driving user satisfaction and retention.

Hypersonica develops advanced defence technology across Europe, with a focus on speed, resilience, and strengthening technological independence. The company values technical excellence and seeks people who approach complex problems with creativity and urgency. Role overview This Junior Systems Engineer position is based in London and sits within a close-knit, skilled team. The role involves hands-on work on projects that influence the future of defence technology. Junior engineers here contribute directly to Hypersonica’s mission and ongoing growth. What makes this role unique Collaborate with experienced professionals in an environment where each team member’s work matters Tackle meaningful challenges and help develop quick, effective solutions Shape the position over time by drawing on your own strengths and interests Support projects that advance Europe’s technological autonomy Who succeeds at Hypersonica People with strong technical abilities and sound judgment Those who thrive both independently and within a team Candidates who have achieved results that others considered unlikely, or who bring a unique mix of skills Individuals ready to take on evolving responsibilities as their contributions grow Applicants with unconventional backgrounds or skills are encouraged to apply, especially if they have a record of delivering results in demanding situations.

Join Trainline as a Junior Data Engineer and embark on an exciting journey to revolutionize the rail travel experience through data-driven solutions. In this role, you will collaborate with a dynamic team of professionals, utilizing cutting-edge technologies to manage and optimize our data infrastructure. Your contributions will directly impact our mission to simplify rail travel for millions of customers.

Join Tracer as a Junior Engineer and kickstart your career in engineering. This exciting role offers the opportunity to work on innovative projects while collaborating with a talented team in a dynamic environment. You will contribute to the development of cutting-edge solutions, gaining hands-on experience and advancing your skills in the engineering field.

About Us At Konrad Group, we are a pioneering digital consultancy focused on delivering innovative solutions to complex business challenges for our esteemed global clients. Our culture thrives on creativity, collaboration, and a commitment to excellence, with our digital products impacting millions of users worldwide. We seek exceptionally talented, analytical, and passionate individuals eager to grow and learn in a dynamic environment. Role Overview As a Junior Software Developer, you will engage with mobile and web application projects. Collaborating closely with our talented development team, your responsibilities will include contributing to the creation of both consumer and enterprise applications. This position is perfect for recent graduates or entry-level developers eager to enhance their technical skills while working alongside experienced professionals at Konrad Group. Your Responsibilities Develop maintainable, testable, and efficient code in partnership with our esteemed team. Engage in code reviews and thorough testing to ensure the delivery of high-quality software. Explore new technologies and tools, sharing insights with the team to foster innovation. Communicate effectively with all team members to ensure smooth collaboration. Qualifications Solid understanding of key programming and computer science principles. Knowledge of the end-to-end development of web applications. Fundamental understanding of core web technologies (HTTP, DOM, SSL, web servers). Excellent interpersonal skills, with a focus on team collaboration and communication. A proactive attitude and a commitment to delivering high-quality work. A passion for optimizing software development workflows and processes. Preferred Skills If focused on web development, familiarity with JavaScript, React, Node.js, Python, or Java is advantageous. If inclined towards mobile development, experience with iOS (Swift/Objective-C) or Android (Kotlin/Java) is a plus. Benefits and Perks Comprehensive Health & Wellness Benefits Package Social events, outings, and retreats Retirement planning support Parental leave program A culture that promotes continuous learning and development Flexible work arrangements

Established in 2018, Fasanara Digital operates as the cryptocurrency division of Fasanara Capital, an FCA-authorized investment firm managing assets worth USD 5 billion. With a dedicated focus on digital assets, Fasanara Digital has emerged as one of the largest, most enduring, and top-performing market neutral funds in the industry. Our approach to trading is rigorous, technologically advanced, and scientifically driven.We are currently seeking a motivated Junior Trade Support Engineer to join our front office technology team. This is an entry-level position ideal for an enthusiastic engineer with a solid STEM background who is eager to engage with live, high-frequency trading systems. Your role will involve monitoring, investigating, and resolving real-time trading and infrastructure issues, collaborating with traders, quants, and senior engineers to ensure our systems operate seamlessly in dynamic market conditions.

Your impactful mission. As a Junior Game Developer, you will...Design and implement high-performance game simulations utilizing our proprietary libraries and tools to validate and test intricate mathematical models.Provide game producers with the essential tools, data, and insights necessary to create successful gaming experiences.Analyze and report statistical data derived from extensive sample sets of billions of games.Develop game prototypes to explore and enhance innovative game concepts.Create technical specification documents that articulate and clarify complex models in a precise manner.

About UsAt Mytos, we are on a mission to revolutionize the biotech industry. Join our innovative team, and you'll empower scientists, speed up their research, and play a vital role in delivering cures to patients more rapidly.We have engineered cutting-edge machines that fully automate the production of human cells—once the most labor-intensive process in biotechnology. These cells are pivotal in the discovery and development of new drugs, including treatments for cancer. Mytos is set to transform the landscape of cure development.Our technology is currently utilized by multibillion-dollar biotech companies across both coasts of the United States, and we have successfully raised $19 million to accelerate our market expansion and further enhance our development efforts!Our diverse, world-class team includes former Dyson engineers and scientists published in Nature, collaborating closely to tackle this ambitious challenge. Discover more about your potential Mytos teammates here: TeamMytos is proud to be backed by Y Combinator, the most successful startup accelerator globally, which has fostered companies such as Airbnb, Dropbox, and Ginkgo Bioworks.

Role OverviewJoin our dynamic IT support team as a Junior Service Desk Engineer. We seek a dedicated and customer-oriented individual to deliver first-line technical assistance to end users, effectively troubleshoot both hardware and software concerns, and ensure the seamless operation of our IT infrastructure. This position is based on-site and requires excellent communication skills along with a proactive attitude towards problem-solving.Key ResponsibilitiesDeliver Level 1 technical support for desktops, laptops, printers, and other peripheral devices.Address user inquiries through our ticketing system, via phone, and face-to-face interactions.Diagnose and resolve hardware, software, network connectivity, and login issues.Install, configure, and maintain operating systems and essential business applications.Assist with Active Directory functions including password resets, user account creation, and permission management.Provide support for email and collaboration tools such as Outlook and Teams.Document, track, and update incidents and service requests within the ticketing system.Escalate complex problems to senior support teams when necessary.Help with device setup, imaging, and deployment for new employees.Maintain IT documentation, asset records, and support protocols.Adhere to IT security policies and best practices.Required Skills & Qualifications1–2 years of experience in IT Service Desk / Desktop Support / Technical Support.Basic understanding of Windows operating systems and Microsoft Office suite.Familiarity with Active Directory user management.Knowledge of fundamental networking concepts (Wi-Fi, VPN, IP configuration).Experience with a ticketing or helpdesk system.Strong analytical and troubleshooting skills.Exceptional communication and customer service abilities.Willingness to work on-site and provide hands-on support.Preferred Skills (Nice to Have)Experience with Office 365 / Microsoft 365 administration.Basic knowledge of hardware troubleshooting and device imaging.Relevant IT certifications such as CompTIA A+, ITIL Foundation, or similar.Key CompetenciesCustomer-focused mindsetEffective time management and prioritizationCollaborative team playerEagerness to learn and developAttention to detail