Senior Software Engineer at Aircall | London

Join our innovative team as a Software Engineer at Ansatz Capital, a dynamic and agile quantitative trading startup based in London. You will play a pivotal role in developing and maintaining high-performance trading applications and robust infrastructure across various financial markets. Your expertise will aid in building a comprehensive infrastructure that supports our trading operations. This position thrives in a fast-paced environment with daily release cycles, requiring keen prioritization between immediate and long-term goals.Our systems encompass a wide range of components, from hardware drivers to TCP/multicast handlers and Python interfaces, all of which necessitate custom optimizations for latency and bandwidth. A solid understanding of the trade-offs involving clock cycles and CPU cache effects is essential. You will employ multi-core and multi-threaded communications using lock-free algorithms, thereby pushing the limits of computational efficiency. A strong grasp of runtime behaviors, serialization delays, and asymptotic performance in this context is necessary. Compensation includes a competitive base salary, a discretionary performance bonus, and opportunities for participation in long-term incentive programs.

Join Ansatz Capital as a Research Engineer, where you will engage in the innovative research, testing, and deployment of cutting-edge trading strategies. You will also play a critical role in designing and constructing the research infrastructure that enables the evaluation of various trading concepts.We seek candidates who are deeply passionate about strategy development, with a strong aptitude for quantitative problem-solving and a keen interest in uncovering and capitalizing on statistical patterns within the financial markets. Proficiency in Python is essential, as you will be responsible for implementing your insights effectively.Ideal candidates will possess robust software implementation skills and have a track record of developing high-performance code alongside user-friendly tools. Your ability to deliver functional software solutions rapidly and accurately will significantly enhance our quantitative research capabilities and broaden our trading strategy coverage.Our compensation package includes a competitive base salary, a discretionary performance bonus, and opportunities for participation in long-term incentive schemes.

Capital.com seeks a Senior Video Producer in London to lead the creative and operational side of video content production. This position shapes the company’s visual storytelling across brand and performance campaigns, supporting both local and international growth. Role overview The Senior Video Producer manages the entire video production process, from developing concepts and planning shoots to overseeing editing and final delivery. Projects range from flagship brand films and educational explainers to digital ads and documentary-style videos. The role blends creative leadership with hands-on operational management. What you will do Oversee end-to-end video production, starting with strategy and concept through to final delivery Work across multiple formats, including brand films, explainers, advertisements, and documentaries Lead both the creative direction and daily operations for each project Collaborate with internal teams and external production partners Maintain Capital.com’s creative, compliance, and business standards in all content, serving international markets Requirements Strong background in video storytelling and technical production Proven experience leading creative and production teams Skill in balancing creative ideas with business and compliance needs Experience working with both internal stakeholders and external partners

Join our dynamic UK office as a Senior Internal Auditor, where your analytical skills will play a pivotal role in evaluating and strengthening our internal controls, compliance frameworks, and risk management processes across various business functions. We are looking for a candidate who possesses a thorough understanding of financial regulations, particularly within the DIFC, DFSA, and SCA contexts, and is adept in navigating the complexities of a digital brokerage environment. Your ability to effectively audit agile and cross-functional teams will be essential in this role.

At SuperSeed, we cultivate talent from within. This position is exclusively available for former founders, first hires, or operators keen to dive into venture capital at its grassroots and contribute to establishing a leading European VC firm.SuperSeed is a prominent early-stage B2B SaaS venture capital firm located in London. We specialize in investing in exceptional industrial startups at their inception and supporting them in their journey to market readiness.Our investment focus spans various sectors including genomic sequencing, pharmacological design, continuous manufacturing, construction, and infrastructure. We back software innovations that revolutionize production processes, logistics, and supply chain management. Furthermore, we invest in fintech solutions, developer tools, cybersecurity, and enterprise automation technologies that reshape the modern workplace.Founded in 2018 by Mads Jensen and Dan Bowyer, our team comprises entrepreneurs dedicated to empowering fellow entrepreneurs. With fewer than 10% of VCs in the UK being former founders, we believe this needs to change, particularly at the earliest stages of venture capital. Our successful track record includes eight exits as both entrepreneurs and investors, and we have generated millions in contract value globally. Our approach is to provide value that extends beyond financial investment, collaborating closely with founding teams to determine the necessary active support at any stage of their journey—from reaching their first million to Series A funding and beyond.Having invested in 27 companies so far, we are eager to identify the next generation of outstanding technical founders, innovative products, and exceptional teams. Our investment team is expanding to continue this vital mission.The Opportunity:This is where you come into play.We seek intelligent, insightful, persistent, detail-oriented, and engaging individuals who aspire to gain exposure to the dynamic and exhilarating landscape of startups and venture capital.This is an entry-level role, but we expect all candidates to demonstrate potential partner characteristics. You will be immersed in a fast-paced environment, working closely with our cohesive team. Daily interactions with partners and senior investors will provide you with comprehensive insights into all business facets. Your primary responsibilities will include engaging with founders, sourcing deals, conducting interviews, performing market analysis, and executing due diligence. Leveraging your networking abilities, you will research compelling companies and trends and represent SuperSeed at various events.

Identify and recommend new investment opportunities through data-driven analysis.Screen deals: Engage with prospects through calls and meetings, evaluate potential opportunities.Analyze company documents and materials for insights.Conduct thorough evaluations of industry landscapes.Perform market sizing and competitor analysis to identify trends.Develop financial models to assess and stress-test unit economics.**Additional skills in Computer Programming (Python, Java) are a plus.

Position Overview: Join our dynamic team at Squarepoint Capital as a Junior UX/UI Engineer. We are seeking a creative technologist who marries exceptional design capabilities with a robust foundation in front-end development. In this exciting role, you will collaborate closely with our team to design and implement intuitive user experiences for our web-based trading and enterprise platforms. You'll be instrumental in translating complex, data-rich interfaces into engaging designs using Figma and React. Your coding skills will allow you to work effectively alongside engineers, keeping technical constraints in mind while contributing to front-end development when necessary. This is a remarkable opportunity to evolve into a well-rounded UX/UI Engineer, enhancing your design expertise and engineering skills in a fast-paced financial technology space. You'll be involved in the full product development life cycle—from conceptualizing ideas to delivering polished outputs, iterating based on user feedback and technical limitations, and performing QA testing before launch.

About the Role demo.levels.fyi is hiring a Software Engineer in London. This role works closely with teammates to build and improve products that impact users directly. The team values collaboration and encourages new ideas that move the product forward. What to Expect Contribute to product development and user experience improvements Work with others to solve technical challenges Apply modern software and design practices About demo.levels.fyi With roots going back to the 1500s, demo.levels.fyi blends a long history with ongoing innovation in technology. The company continues to evolve, focusing on new approaches in software and design.

Our Journey Welcome to Zopa! Founded in 2005, Zopa pioneered the peer-to-peer lending landscape and in 2020, we proudly launched Zopa Bank. We’re on a mission to transform the banking experience by listening closely to our customers and addressing their concerns with innovative solutions. Our vision centers on placing individuals at the heart of banking, empowering them to aim high and advance the financial world. Discover more about our exciting services at Zopa.com! Our accomplishments are a testament to the incredible talent within our team. We’re not just collecting industry accolades; we’ve also been recognized as one of the top three Most Loved Workplaces in the UK. If you are enthusiastic about tackling unconventional challenges, eager to think outside the box, and driven to create a significant impact, Zopa is the place for you. Join us and make a difference! Want to see our culture in action? Follow us on Instagram @zopalife.The Engineering OpportunityAs a Software Engineer at Zopa, you will do more than just code; you will engage in solving meaningful financial challenges for millions of customers. You will work on distributed systems that process thousands of transactions daily, develop robust services that manage financial assets, and design user experiences that simplify traditionally complex financial products.

Position Overview: Squarepoint Capital is excited to announce a newly established opportunity for a Tax Analyst to join our dynamic tax team. This role is essential for supporting various aspects of the Group’s international tax obligations related to our management companies. The successful candidate will be based in our London office and will report to the Tax Manager in the UK. Support the preparation of financial data and disclosures for audited financial statements and management reporting. Collaborate on the review of direct tax returns prepared by service providers for the management companies across our global Group, including liaising with internal teams and gathering necessary information. Maintain a compliance calendar to ensure timely tax filings and manage tax payments across multiple jurisdictions. Assist with transfer pricing matters by collating information to ensure comprehensive global documentation and liaising with service providers. Support employment tax matters, including reporting for short-term business visitors. Assist with reporting obligations under Country-by-Country Reporting (CBCR) and Pillar Two. Ensure the maintenance of an effective tax documentation management system. Help manage the tax compliance budget, accruals, and engagements. Interact with various internal departments, including Finance, Legal, and HR.

Join our dynamic team at getscope as a Software Engineer, where innovation meets excellence. As a key member of our development team, you will work on cutting-edge projects, contribute to all phases of the software development lifecycle, and help us deliver high-quality software solutions. This role offers an exciting opportunity for growth and collaboration in a fast-paced environment.

Join our innovative team at Faculty as a Software Engineer. In this role, you will be responsible for developing scalable software solutions that meet the needs of our clients. You will collaborate with cross-functional teams, utilizing the latest technologies to deliver high-quality products.

Join Our Team at Adaptive! At Adaptive Financial Consulting, we are a premier consulting firm dedicated to providing innovative solutions for capital, commodity, and digital market participants. We pride ourselves on leveraging technology to create differentiation and long-term competitive advantages. Our seasoned experts design and implement intricate front-office technology solutions, utilizing proven accelerators to enhance client outcomes. Our clientele encompasses leading global investment banks, asset managers, fintech companies, and capital market service providers. With a widespread presence across London, New York, Barcelona, Manila, and Montreal, we boast a strong track record in delivering sophisticated, elegant, and user-friendly trading technology solutions. We are currently seeking a passionate and skilled Solution Engineer to enhance our London team.

Join Our Team! At demo.levels.fyi, we are looking for a passionate Software Engineer to contribute to innovative projects in the tech industry. Our team thrives on creativity and collaboration, fostering an environment where ideas bloom. You will be working with cutting-edge technologies and play a crucial role in developing solutions that redefine the user experience.

Senior Software EngineerBecome a key player in our mission to revolutionize the shopping and dining experience, where innovation, impact, and growth are at the forefront of everything we pursue. Our Engineering teams tackle intricate technical challenges across a global, three-sided marketplace, constructing and scaling systems that cater to millions of customers, riders, and partners daily.From real-time logistics to robust infrastructure and marketplace optimization, we design, build, and operate technology that fuels Deliveroo’s expansive growth.We seek a Senior Software Engineer to join our London (Hybrid - 3 days from the office) team. In this pivotal role, you will enhance code structure and architecture while leading project planning to maximize efficiency and reliability across our production systems.Familiarize yourself with our Engineering team — discover what motivates us, our work culture, and what you can anticipate.Your ResponsibilitiesHere’s what your day-to-day might encompass:Pursue Technical Excellence: Refine code structure and architecture within your team’s domain, conducting impactful code reviews to ensure quality and scalability.Steer Project Planning: Anticipate dependencies and risks, collaborating closely with Product and Design to ensure seamless delivery of complex features.Enhance Operations: Streamline the maintenance and operation of production systems, fostering visibility, health, and operational readiness.Collaborate & Influence: Cultivate relationships across engineering teams to uncover collaboration opportunities and influence the broader technical roadmap.Mentor & Recruit: Facilitate the personal development of your colleagues through technical mentorship and actively participate in engineering interviews to expand our team.Desired QualificationsOur ideal candidate will bring robust expertise in several of these areas and a willingness to grow in others:Solid Engineering Principles: A strong commitment to crafting readable, well-designed, and thoroughly tested software.Backend Proficiency: Extensive experience in developing web-based applications (we utilize Go, Ruby/Rails, Python, Scala, and Rust).Data Proficiency: Familiarity with data handling and optimization techniques.

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

About xAIAt xAI, we are dedicated to developing cutting-edge AI systems that enhance humanity's understanding of the universe and support our quest for knowledge. Our team is compact yet highly driven, committed to engineering excellence. We seek individuals who relish challenges and thrive on curiosity. Our flat organizational structure empowers all employees to take initiative and contribute meaningfully to our mission. We value strong work ethics and prioritization skills, and we expect our team members to communicate effectively and share knowledge concisely with one another. About the TeamAs a member of our team, you will engage with the full xAI technology stack, encompassing model development to production infrastructure. This role is based in London, UK, and we will align you with a suitable team during the offer stage.About the RoleWe understand that every candidate has a unique journey. Whether you’ve engineered embedded systems for spacecraft or developed large-scale distributed infrastructure, we believe that engineers who excel in one challenging domain can thrive in others. At xAI, our primary focus is on training advanced AI models and delivering products built on them. If you possess a proven track record of remarkable achievements—be it resolving critical issues under tight deadlines or successfully reviving a struggling project—we encourage you to apply, even if your background doesn’t align perfectly with machine learning or software development. The “statement of exceptional work” section in your application is paramount; please take the time to be concise, specific, and concrete.Interview ProcessApplication review.15-minute technical call with the team.Technical interviews.Role alignment discussion.

About Mistral AIAt Mistral AI, we harness the transformative power of artificial intelligence to simplify daily tasks, save precious time, and enhance learning and creativity. Our innovative technology is crafted to seamlessly integrate into the fabric of everyday work life.We are on a mission to democratize AI through high-performance, optimized, and cutting-edge open-source models and solutions. Our robust AI platform is tailored to meet the diverse needs of enterprises, whether on-premises or in the cloud. Our flagship offerings include Le Chat, your AI assistant for both life and work.We pride ourselves on being a dynamic, collaborative team deeply passionate about AI and its potential to reshape society. Our diverse workforce thrives in competitive environments and is dedicated to fostering innovation. With teams distributed across France, the USA, the UK, Germany, and Singapore, we embody creativity, humility, and a strong team spirit.Join us on this exciting journey as we shape the future of AI, making a meaningful impact together. Discover more about our vibrant culture at https://mistral.ai/careers.Role OverviewWe are on the lookout for passionate and talented Software Engineers to join our team. As a Backend Engineer, you will play a pivotal role in developing the core systems that power our key products: AI Studio, Le Chat, and Mistral Code. You will shape how users and developers interact with our AI platform at scale. Your focus will be on building reliable, high-performance backend systems and APIs that support millions of users and developers. Your contributions will directly enhance the user and developer experience, making it more engaging, efficient, and intuitive. We welcome engineers at all levels, from fresh graduates to seasoned professionals who are eager to learn, collaborate, and deliver impactful solutions.Key ResponsibilitiesBased on your expertise, you will engage in crucial components of our technology, including:Backend Development- Design, develop, and maintain scalable and robust backend features and APIs using modern frameworks.- Ensure high performance and reliability across our distributed systems.- Contribute to systems that support authentication, billing, AI tooling, and observability.

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