Intermediate Java Software Engineer

Join weekday-1 as a Founding Software Engineer and become a key player in shaping our innovative technology solutions. As part of a dynamic startup team, you will be responsible for designing, developing, and maintaining cutting-edge software applications that will drive our vision forward.We are looking for an enthusiastic and skilled engineer who thrives in a fast-paced environment and is eager to take on new challenges. Your contributions will directly impact our success, making this an exciting opportunity for those looking to make their mark in the tech industry.

Join our dynamic team at weekday-1 as a Software Engineer where you will play a crucial role in developing innovative software solutions. Work alongside talented professionals in a fully remote environment, collaborating to drive success and enhance our product offerings.

Are you a passionate Senior Software Engineer looking to make an impact in a dynamic and innovative environment? At weekday-1, we empower our engineers to push boundaries and create solutions that drive success. Join us remotely from London and become a key player in our mission to revolutionize the software landscape.

About the Role Weekday-1 is hiring a Senior Software Engineer in London to help build and scale intelligent systems with Python and Large Language Models (LLMs). This role focuses on designing, developing, and deploying AI-driven solutions for real-world problems. What You Will Do Design and implement systems that use LLMs in production settings Work across the full development lifecycle, from architecture through deployment Collaborate closely with product, data, and research teams to deliver reliable, high-performing solutions Ensure that AI systems meet performance and reliability standards What We’re Looking For Extensive experience with Python Strong background in integrating and scaling Large Language Models Ability to work collaboratively as a senior member of an engineering team Location This position is based in London, England, United Kingdom.

Corgi is a licensed insurance carrier designed for tech startups, powered by AI. With $108M in funding and regulatory approval, Corgi is expanding into the UK and EU markets. The platform is built on Django, integrates Stripe for payments, and features AI-driven underwriting. Role overview Corgi is searching for a Founding Software Engineer based in London. This position calls for someone who brings ideas to life, taking projects from concept to live product. Candidates with a track record of side projects, shipped products, or anything that has gained real user engagement will stand out. This is more than a senior engineer role by title; it’s about building and launching real solutions. What you will do Independently build and deploy products from the ground up Work across the technology stack, handling new challenges as they arise Deliver results quickly, often within hours or days Contribute to a culture that values shipping and iterating frequently Participate in open and transparent decision-making Requirements Demonstrated experience developing and launching projects independently Comfort working across a broad technology stack Strong, experience-backed opinions with a willingness to consider better ideas Ambition and energy suited to a rapid startup pace Focus on delivering results rather than relying on job titles Work culture Decisions made quickly, even with incomplete information Frequent releases and continuous improvements Short review cycles with a focus on shipping and iterating Consistent performance expected beyond just launch periods Transparent, public-first communication style Healthy internal competition that encourages growth This is a hands-on build role. Consistent effort is expected; coasting is not an option. Behaviors that do not fit Engaging in workplace politics, gossip, or avoiding accountability Taking feedback personally instead of using it for improvement Introducing unnecessary bureaucracy rather than simplifying processes Failing to deliver after making commitments How to apply Send links to your GitHub, personal website, or live projects you have built and launched Resumes are not accepted Email: sergio@corgi.com If you cannot show shipped work, this role is not a fit Compensation and location Role based in London (on-site or hybrid) Salary range: £75,000 to £140,000, plus equity options Compensation depends on demonstrated ability to ship, not job title

Join our innovative team at weekday-1 as a Software Engineer, a role crafted for technology enthusiasts eager to contribute to cutting-edge projects in a fully remote environment. You will collaborate with a dynamic team of developers, designers, and product managers, leveraging your skills to create impactful software solutions.

Join us at tracebit, where we empower security teams to swiftly and accurately identify intrusions within their cloud environments. Our innovative product utilizes deceptive canaries—virtual tripwires designed to mislead potential attackers.This is an exhilarating moment to become a part of our founding team:We are supported by top-tier investors including Accel and Tapestry.Our growth trajectory is remarkable; we doubled our Annual Recurring Revenue (ARR) last quarter and have secured major clients like Riot Games, Synthesia, Docker, Coveo, and Snyk, along with several others who we can’t publicly disclose.As one of the most promising startups in the UK, we have received outstanding market feedback and are poised for explosive expansion.We are frequently featured in esteemed startup rankings...Creandum’s Euro Seed Top 50 List, Sifted’s 2025 London Startups To Watch, Notion’s Cloud Top 100, and more.Our research has recently played a crucial role in resolving a critical security vulnerability in Google’s Gemini CLI.Having started with just 2 employees 18 months ago, we have expanded to 18 and plan to triple our team in the coming year.We are addressing substantial challenges for discerning organizations. Our streamlined tech stack empowers us to process billions of events weekly while maintaining robust security.

About WexlerWexler is at the forefront of developing an unparalleled AI system tailored for litigation. Collaborating with some of the largest law firms globally, we assist them in navigating their most intricate cases, identifying winning strategies, and distilling clarity from the often overwhelming array of documents and facts. Based in London, we are a rapidly expanding legal AI company, trusted by firms like Clifford Chance, HSFKramer, Goodwin, and Addleshaw Goddard to uncover critical insights that can significantly impact case outcomes.Supported by a $5.3M Seed funding from Pear VC, Seedcamp, The LegalTechFund, and several prominent industry angels, we are committed to building a comprehensive AI platform designed to manage, resolve, and preempt legal disputes for enterprise law firms and Fortune 500 companies. Our growth trajectory of 10x year-over-year and the continuous acquisition of prestigious firms speaks to our success. Our innovative system efficiently extracts objective, cross-referenced facts from millions of documents, empowering litigators to secure more victories while conserving invaluable time. This ensures that every client receives the exceptional representation they rightfully deserve.At Wexler, we understand that AI is revolutionizing the legal landscape, yet many existing tools tend to focus on contract law or serve as generalist copilots. We pride ourselves on being the leading generative AI platform specifically crafted for the intricacies of litigation, a fact underscored by our remarkable growth.About the RoleAs our inaugural dedicated security engineer, you will play a pivotal role in establishing and managing the bedrock of Wexler's security framework, encompassing infrastructure, product, and compliance. Your collaboration with engineering, operations, and leadership teams will be essential to not only enhance our security measures but also to provide tangible proof of our commitment to security for our clients.Responsibilities:Take charge of current security tools and introduce new solutions (e.g., endpoint protection, MDM, access controls), ensuring their effective configuration, maintenance, and scalability as the organization expands.Integrate secure-by-design practices throughout the development lifecycle, from secure coding and threat modeling to design reviews and CI/CD hardening.Monitor systems for any anomalies and proactively design detection and prevention mechanisms.Ensure that infrastructure and applications comply with accepted industry standards (e.g., OWASP Top 10, AWS Well-Architected Framework).Conduct and lead risk assessments, including evaluations of third-party vendors and internal processes.

Corgi provides insurance for technology startups, using AI to streamline underwriting and operations. With $108 million in funding and full regulatory approval as a licensed carrier, Corgi is expanding into the UK and EU. The platform uses Django, integrates Stripe for payments, and relies on AI-driven processes at every stage. Role overview This founding engineer position is based in London and focuses on building and shipping real products. Joining at an early stage, the role involves shaping both the product and company culture as Corgi grows in new markets. The work is hands-on, with a strong emphasis on delivering live solutions rather than just planning or design. Requirements Track record of independently building and launching projects with real user engagement and polished outcomes Comfort working at a daily pace, prioritizing progress over prolonged planning Ability to work across the technology stack and solve problems directly Strong opinions, balanced by openness to better solutions Humble attitude and genuine drive to build and improve How Corgi works Decisions are made quickly, without waiting for perfect answers Products and improvements are released regularly, not just quarterly Ship-and-iterate mindset keeps momentum high and avoids bureaucracy Consistent intensity during product pushes, with minimal slowdowns Decisions are made transparently High performers help raise the bar for the team This is not a passive or comfortable position. The role suits those who want to build and take ownership. Behaviors that lead to removal Engaging in office politics, avoiding responsibility, or gossiping Treating direct feedback as a personal attack Adding unnecessary complexity instead of improving efficiency Missing deadlines after making commitments How to apply Instead of a resume, send links to your work, such as: GitHub repositories Personal website Live projects Shipped applications Email applications to: sergio@corgi.com Candidates must have demonstrable projects to share. If not, this role is not a fit. Location This position is based in London. On-site or hybrid work options are available. Compensation Salary ranges from £75,000 to £140,000, plus equity. The range reflects a focus on real shipping ability over job titles.

Join Version 1 as an AI Software Engineer and be at the forefront of innovation in artificial intelligence. In this full-time role, you will work with cutting-edge technologies to develop AI-driven software solutions that enhance business operations and customer experiences.As a key member of our Digital, Data and Cloud department, you will collaborate with cross-functional teams to design, implement, and optimize AI algorithms and models. Your contributions will help shape the future of our products and services.

Your RoleAs a Founding Engineer at Marloo in London, you will play a pivotal role in shaping the future of our product. Your responsibilities will include:End-to-End Full-Stack DevelopmentOwn and develop core product features, working seamlessly from backend infrastructure to engaging frontend experiences, prioritizing rapid delivery and continuous iteration.Architectural LeadershipEstablish sustainable technical patterns and make crucial architectural decisions that align with our growth trajectory. You will be the guiding authority on our codebase and influence our engineering culture significantly.Collaborative Product DevelopmentEngage directly with the founders to convert user feedback into innovative technical solutions. Your understanding of business needs and product development will be as essential as your technical skills.AI-Driven DevelopmentUtilize AI tools daily to enhance your development processes, from architecture to debugging. We expect you to be an adept user of the latest AI development technologies.

Corgi is a licensed insurance carrier focused on tech startups, using AI to simplify and speed up coverage. The company has raised $108M and is expanding across the UK and EU. The platform relies on Django, integrates Stripe for payments, and features AI-driven underwriting. Role overview This founding engineer role is based in London and centers on building and launching new products, often independently. Corgi values engineers who turn ideas into live products, rather than following detailed roadmaps. Evidence of shipped side projects, weekend builds, or products that have reached real users is highly regarded. Who succeeds here Track record of independently building and delivering real projects Comfortable working across the full technology stack Delivers results quickly, in hours or days Low-ego, motivated by results rather than titles Open to feedback and willing to adopt better ideas Thrives in a high-energy startup setting How we work Decisions are made quickly; perfection is not the goal Products and processes ship regularly, not just quarterly Iteration happens after shipping, not after long review cycles High intensity during launches, with a steady pace year-round Transparent decision-making; no closed-door policies Internal competition is encouraged to raise standards This is a hands-on role for builders who want to make things happen. Behaviors that don’t fit Office politics, gossip, or avoiding responsibility Taking direct feedback personally instead of constructively Adding unnecessary overhead instead of streamlining Missing deadlines after committing to them Application process Send links to your GitHub, personal website, live projects, or shipped products CVs are not accepted Email applications to: sergio@corgi.com Evidence of shipped work is required for consideration Location and compensation Role is based in London; on-site or hybrid arrangements available Base salary: £75,000–£140,000, plus equity Salary band reflects proven shipping ability, not job titles

Salary: £150,000 – £170,000Equity: 0.7% - 1.2%This position is in-person with flexible remote workdays.European visa sponsorship is available.About AuroraAurora is redefining the lifestyle operating system for top-performing individuals and organizations worldwide. Our clientele includes elite founders, executives, professional athletes, and families managing intricate and ongoing needs across travel, health, dining, and premium goods.Our platform is conversational, proactive, and accessible 24/7 globally, making it a vital tool for members who engage with it multiple times daily for crucial, time-sensitive decisions. The quality of our product, the soundness of our judgment, and the efficiency of our systems are instantly visible to our customers.The market for agentified premium lifestyle commerce exceeds $10 billion, with traditional concierge services often hampered by disjointed CRM systems and manual processes that lack scalability. Aurora integrates automation, AI agents, and expert human curators into a unified system, engineered for speed, precision, and impact.We have achieved remarkable early success:51% daily active users, 95% weekly active usersTransaction volume and member spending have surpassed industry benchmarks by 5x within the first three monthsBacked by Alex Macdonald, a leading figure in this domain, we have:Secured over $5 million in funding from seasoned operators and top-tier investorsDeveloped a product that boasts industry-leading engagement from paying membersAccumulated a substantial, proprietary dataset of user context (preferences, calendars, health signals) that fuels our proactive AI capabilitiesAs we scale our product and expand our member base, we are looking to grow our founding engineering team.Aurora operates from our offices in London, New York, and Los Angeles. Our engineering team primarily collaborates from our London office in Belgravia, with options for flexible remote work.

About TracerTracer is an innovative early-stage startup that specializes in developing autonomous AI agents for production data pipelines. Backed by seasoned investors and industry leaders, we believe that AI will revolutionize production systems, becoming a key player in enterprise software over the next decade. Our team is composed of highly skilled professionals focused on delivering impactful results. Role OverviewWe are seeking a Founding AI Engineer (Staff) to join our London team. In this pivotal role, you will be responsible for designing the core architecture and launching an AI agent that generates reliable root cause analyses (RCAs) and actionable suggestions for significant alerts. While human oversight remains essential for production decisions, you will empower the agent to handle the intricacies of data management. Our Technology StackPython with LangGraph for multi-agent alert investigationsRust for high-performance systemsClickHouse for scalable event and investigation historyAWS and Terraform for self-managing infrastructureNext.js and TypeScript for an engaging front-end experience Your ResponsibilitiesAs the core architect, you will transform alerts into comprehensive investigations and RCAs. Your key tasks will include:Designing and building the primary alert investigation and RCA pipeline using PythonCreating essential systems such as alert ingestion, context enrichment, hypothesis orchestration, and reportingMaking critical architectural decisions to ensure reliability and observability from the outsetCollaborating with founders to refine and expand high-value alert typesDeveloping customer-ready integrations across the pipeline

Corgi builds insurance products for tech startups, using AI to power underwriting and streamline the experience. With $108 million raised, Corgi operates as a licensed carrier and holds full regulatory approval. The platform is built on Django, integrates Stripe for payments, and is expanding into the UK and EU markets. Role overview This founding Software Engineer role is based in London. Corgi seeks someone who enjoys building and launching products independently, without waiting for detailed roadmaps. Engineers who have turned ideas into real, live applications, whether side projects, weekend hacks, or anything used by others, are valued highly. What matters here Self-motivation and adaptability in a startup setting Proven ability to independently build and ship real projects Focus on delivering results quickly, think in hours and days, not sprints and quarters Comfort working across the full technology stack and openness to new challenges Strong opinions, balanced with openness to better ideas Collaborative, low-ego approach with a focus on outcomes How Corgi works Decisions happen quickly; progress is prioritized over perfection Products and updates roll out frequently, not just on a quarterly schedule Ship-and-iterate mindset; long review cycles are rare High intensity during launches, with steady productivity at other times Transparent, public decision-making is valued Internal competition helps raise the bar This is a hands-on role for builders who want to make an impact. Behaviors that don’t fit Office politics, avoiding responsibility, or gossip Taking feedback personally instead of using it to improve Adding unnecessary bureaucracy instead of streamlining work Missing deadlines or not following through on commitments How to apply Share links to your GitHub, personal site, live projects, or anything you have built and launched Resumes are not required Email your application to: sergio@corgi.com If you cannot show evidence of shipped work, this role is unlikely to be a fit Location and compensation London-based; on-site or hybrid work options available Salary: £75,000 to £140,000, plus equity The wide range reflects a focus on proven ability to ship, not job titles

Pebble - Founding Game DesignerAbout UsAs second-time founders with backgrounds at Google and Synthesia, we are on a mission to create an innovative interface that bridges AI technology and childhood learning.Our ChallengeChildren aged 6 to 10 are spending excessive time on screens, largely engaging with passive or repetitive digital content. Parents seek safe, engaging, and educational experiences for their children. At Pebble, we aim to close the gap between children’s play instincts and parental expectations for their development.Our VisionWe are developing the first generative learning world through our flagship product, Pebble. Inspired by The Diamond Age, our game offers a unique 2D exploration experience built in Godot 4. Players navigate a procedurally generated world alongside an AI companion, engaging in meaningful, open-ended conversations that foster learning and emotional connection.Your role as a game designer will challenge traditional game design norms. Rather than constructing levels, you will create systems that ensure a coherent and engaging generative world, adapting content to each child's unique interests and developmental requirements in real-time.Meet Our FoundersGuillaume (CPTO): Previously the first product hire at Synthesia, he played a pivotal role in scaling the company from $3M to $100M ARR. With over seven years at Google, he has firsthand insight into what captivates and educates children today.Lio (CEO): A serial entrepreneur and founder of Neoplants, where he successfully raised over $25M.

About UsThe DM Capital Council is an exclusive, private club tailored for discerning investors, entrepreneurs, and innovators eager to explore and invest in the forefront of transformative companies. Unlike conventional angel networks, we prioritize community engagement, rigorous research, and privileged access to opportunities.Our strategic advantage stems from our roots in the Decentralized Masters ecosystem, which provides us with a pre-established, high-trust network of 4,500 of the brightest minds in the industry. Our ambition is to cultivate the most engaged, respected, and high-performing private investor community in our sector, and we seek an extraordinary leader to help realize this vision.The Role: Founding Head of the ClubThis role is akin to that of a CEO for a burgeoning venture. You will not simply join a team; you will be responsible for assembling and leading one. As the public face and operational driver of the club, your mission is to evolve this concept into a dynamic, profitable, and self-sustaining business within 90 days.What You Will Do:Be the Face of the Brand:Host all events, oversee member communications, and represent the club with charisma and authority.Act as the principal spokesperson, shaping the club’s voice and narrative across media, online platforms, and live engagements.Architect the Community:Design and implement the member experience, from onboarding to daily engagement, aiming for a Net Promoter Score (NPS) of over 70.Establish frameworks that encourage meaningful interactions, retention, and community-led growth.Drive Growth:Utilize the Decentralized Masters ecosystem to recruit the first 50 members within 90 days and create a scalable growth mechanism for subsequent expansion.Develop clear metrics and systems to track engagement, conversion rates, and retention.Run the Investment Engine:Build and manage a premium deal flow pipeline, encompassing sourcing, screening, due diligence, and presenting investment opportunities to members.Collaborate with founders and co-investors to secure exclusive investment chances.Own the Business:Oversee the P&L, manage the selection and implementation of the tech stack, and handle daily operations with rigorous ownership and operational discipline.Develop processes, reporting, and dashboards to ensure accountability and measurable outcomes.

Join Decisal, where we craft innovative software solutions that empower airlines worldwide to optimize their planning and scheduling processes. As we expand our product offerings, we're on the lookout for a dedicated and talented C++ Software Engineer to become a pivotal member of our vibrant team.In this role, you will be instrumental in designing and developing state-of-the-art software applications. You will engage with clients to implement new features and refine existing systems, enabling you to work on projects that significantly influence our customers and the aviation industry.We pride ourselves on fostering a collaborative and innovative work culture that values your creativity and recognizes your contributions. Decisal Ltd is dedicated to providing a nurturing and inclusive workplace that encourages both personal and professional growth.If you are a driven individual with a solid foundation in C++ programming and a passion for delivering high-quality software solutions, we invite you to apply!

At Complexio, our innovative Foundational AI technology automates business processes by effectively analyzing both structured and unstructured data from across the organization. By employing proprietary algorithms and models, we gain profound insights into human interaction with data, enabling us to replicate and enhance these actions autonomously.Complexio is a collaborative venture involving Hafnia, Símbolo, and partners such as Marfin Management, C Transport Maritime, Trans Sea Transport, and BW Epic Kosan.As a Senior Software Engineer, you will play a pivotal role in our team, crafting cutting-edge applications that harness AI to improve user experiences and optimize communication. Collaborating with a diverse group of Data Scientists, DevOps specialists, Product Managers, and Business Analysts, you will significantly contribute to the design and implementation of specialized AI assistant technologies.