Mid-Level Software Engineer at Freetrade | London

Join Our Innovative Team at FreetradeAt Freetrade, we're on a mission to simplify investing, making it accessible and affordable for everyone. Our goal is to empower individuals to maximize their savings and grow their wealth.We're building an exceptional team of innovators who are passionate about transforming the investment landscape. If you're someone who…

Tessl is an innovative Series A startup located in London, founded by Guy Podjarny. With over $100 million raised from prestigious investors including Index Ventures, Accel, GV, and Boldstart, we have been recognized as the #2 in Sifted EU’s B2B SaaS Rising 100 and #20 in Sifted's AI 100 this year.At Tessl, we are pioneering the transformation of software development with AI. Our vision is to enable AI Native Developers to define features, architecture, and workflows in specifications rather than code, guiding the work of AI agents. We are at the forefront of building a groundbreaking platform for this new paradigm, and we are leading the developer movement and ecosystem around it.Becoming part of Tessl means joining an early-stage team with the opportunity to influence the future of software creation and maintenance.

Position OverviewMateriom is on the lookout for a talented part-time Computational Materials Scientist or Computational Chemist. This role is pivotal in advancing our innovative computational and machine learning methodologies aimed at expediting the research and development of bio-based materials, ultimately contributing to a net-positive impact on our planet.About MateriomMateriom is an innovative tech startup dedicated to enhancing the research and usage of bio-based materials that positively affect the environment. We achieve this by creating extensive datasets and software tools for scientists, manufacturers, and brands. Our flagship platform, Materiom Commons, hosts a vast open database of material formulations coupled with AI capabilities, serving a vibrant community of over 20,000 scientists, designers, engineers, and entrepreneurs who seek sustainable solutions for packaging and textiles. Our interdisciplinary team merges expertise in circular economy, materials science, AI, and software development, fostering a rich learning environment fueled by diverse perspectives. We are united by our optimism and commitment to collective action.Role ResponsibilitiesDevelop and implement computational models to predict the structure–property–performance relationships in polymers and composites.Utilize polymer informatics tools to analyze experimental and synthetic data, identifying trends to guide experimental designs.Incorporate machine learning techniques into materials discovery processes to accelerate formulation and performance optimization.Identify knowledge gaps and collaborate with team members to address them effectively.

About Polygon LabsPolygon Labs is a pioneering global blockchain payments firm dedicated to constructing and managing infrastructure that facilitates instant, reliable, and scalable money transfers. Our mission is to transition all monetary transactions on-chain. We are developing the Polygon Open Money Stack, a cohesive and integrated suite of services and technologies designed to enable seamless and dependable money movement anywhere. Our robust infrastructure has enabled trillions of dollars in on-chain value transfers, supporting millions of daily transactions for some of the world's largest banks, fintech companies, enterprises, and consumer applications.Your RoleAs a Senior Backend Engineer at Polygon Labs, you will be instrumental in developing OMSX, the unified gateway and dashboard for the Polygon Open Money Stack. OMSX serves as the primary interface for developers and enterprises to integrate with Polygon Labs’ financial infrastructure, encompassing payments, wallets, and various on-chain services. This position presents a unique greenfield opportunity to architect and create backend systems from the ground up, handling high-scale infrastructure that processes transaction volumes in the hundreds of millions to billions while shaping the developer experience within the Polygon ecosystem.You will take ownership of significant components of the backend architecture, contribute to key system design decisions, and help lay the groundwork for a platform that empowers global monetary movement.Your ResponsibilitiesYou will be tasked with designing and constructing backend systems that drive OMSX and the broader Polygon Open Money Stack, prioritizing scalability, reliability, and developer experience.Design and implement scalable Go services that manage high-throughput financial workloads.Develop and maintain APIs for integration across various internal services and external financial systems.Create backend systems capable of handling substantial datasets with rigorous performance and reliability standards.Optimize PostgreSQL queries and data models for high-scale production environments.Implement caching techniques and performance enhancements utilizing technologies such as Redis.Contribute to system observability through structured logging, metrics, and monitoring solutions.Collaborate closely with frontend and platform teams to ensure a cohesive developer and user experience.Engage in architectural discussions and make informed decisions regarding system design trade-offs.

Join Side, a leading global video game development and services provider, renowned for delivering innovative technical and creative solutions to top developers and studios worldwide. Established in 2009 and backed by over 30 years of expertise from our parent company in Japan, Side has expanded its reach to 15+ studios across multiple continents including North America, Europe, South America, and Asia.Our comprehensive suite of services encompasses game development, art production, audio engineering, quality assurance, localization, localization QA, player support, community management, and data services. Become a part of our passionate team and help us craft unforgettable gaming experiences that resonate with players around the globe.For more information, visit www.side.inc.As the Lead Audio Engineer, you will be at the forefront of our audio production efforts, managing a talented team of technical staff and overseeing studio operations to ensure the timely delivery of high-quality audio assets. Your leadership will play a pivotal role in maintaining client satisfaction and driving the awards we receive for our outstanding work.

Join Side, a renowned global video game development and services provider, delivering innovative technical and creative solutions to major developers and studios worldwide. Established in 2009, we leverage over 30 years of experience from our parent company in Japan, and have expanded into a global powerhouse with more than 15 studios across North America, Europe, South America, and Asia. Our comprehensive services encompass game development, art production, audio production, quality assurance, localization, localization QA, player support, community management, and data analysis. Help us share extraordinary stories with the world! Become part of our passionate global team of gamers and contribute to creating unforgettable gaming experiences. For more information, visit www.side.inc. We are looking for an enthusiastic candidate who aligns with our mission and is eager to be part of our expanding business. As a Production Manager, you will oversee the seamless execution of dialogue production, supporting a diverse range of games from indie projects to high-profile AAA titles. Collaborating with studios globally, you will facilitate dialogue production in over 30 languages.

Join Our Team as an Enterprise Account Executive! We are seeking a dynamic and driven Enterprise Account Executive to be a key player in our expanding team at Novisto. Your key responsibilities will include: Conduct thorough needs assessments, effectively communicating and demonstrating Novisto’s unique value and capabilities to potential clients. Collaborate closely with diverse stakeholders and representatives across various functions within targeted accounts to drive sales initiatives. Focus on generating new revenue streams from Enterprise and Corporate prospects. Develop and deliver impactful presentations with the support of our Sales Engineer. Craft compelling proposals, respond to RFIs, and negotiate business terms to successfully close sales. Initiate outreach to prospects identified by our Account Development Representative team, marketing efforts, or referrals. Ensure the timely and successful delivery of our solutions in alignment with customer objectives. Act as a liaison between prospects and customers to facilitate effective communication. Maintain and update the CRM system with accurate customer information. Represent Novisto at industry events to enhance brand visibility. Share valuable client insights with product and marketing teams to drive innovation.

About Us SharkNinja is a global leader in product design and technology, offering a diverse range of highly rated lifestyle solutions that enhance the lives of consumers worldwide. With two trusted brands, Shark and Ninja, we are committed to delivering innovative products that disrupt markets and create significant growth. Headquartered in Needham, Massachusetts, we employ over 4,100 dedicated associates, and our products are available through key retailers and online platforms globally. About the RoleAt SharkNinja, we engineer intelligent, connected products that excite consumers and transform categories. Our engineering teams are expanding in Firmware, Cloud, and Mobile App development. We are building systems that integrate hardware, software, and digital experiences, leveraging AI to streamline design, coding, and testing processes.Join us in designing and delivering the next generation of SharkNinja products, including mobile applications that link consumers to their devices, full-stack architectures that provide seamless experiences, and cross-platform solutions that bring intelligence right to users' fingertips. You'll enhance our current SharkClean app platform while helping to shape a unified app ecosystem for all SharkNinja connected devices. Together, we are making our products smarter every day.What You'll DoCreate cross-platform solutions with React Native to expedite feature delivery for both iOS and Android.Collaborate closely with embedded systems, cloud, and hardware teams to provide comprehensive connected product experiences.Design and implement full-stack architectures that integrate mobile applications with cloud services and connected devices.Develop, execute, and automate tests to verify reliability, performance, and consumer-ready quality.Optimize mobile app performance for broad consumer deployment across diverse device environments.Engage with cross-functional development teams across the software stack from embedded systems to cloud services.

Join our innovative team at AECOM as a Senior Software Engineer, where you will play a critical role in designing and developing cutting-edge software solutions. You will collaborate with cross-functional teams to bring complex projects to fruition, ensuring high quality and performance standards are met.

Join Wayve Technologies as a Principal Application Software Engineer and be part of a pioneering team that is transforming the future of autonomous driving. This role involves leading software application development, collaborating closely with cross-functional teams, and driving innovative solutions to real-world challenges in the automotive industry.The ideal candidate will possess extensive experience in software engineering, a strong understanding of algorithms, and a passion for cutting-edge technology. You will play a critical role in enhancing our software architecture and ensuring the scalability and performance of our applications.

Join Canva as a Principal Frontend Engineer and lead the charge in developing innovative web applications that empower users worldwide! In this pivotal role, you’ll collaborate with cross-functional teams to create seamless user experiences and optimize performance.

Join Our Team!At Plum, we are revolutionizing how people save and invest. Our mission is to empower individuals to grow their wealth for life, whether they are saving for their first home or enjoying retirement. Since our inception in 2016, over 2 million users across 10 European countries have saved more than £2 billion with our innovative automation and AI technology. We've been recognized with awards from esteemed organizations like Deloitte and Finder, reflecting our commitment to excellence.We are a passionate team of over 200 Plumsters working collaboratively across Europe, and we are eager to welcome more talented individuals to help us achieve our vision.Your RoleAs a Senior Backend Engineer at Plum, you will play a crucial role in shaping our technology and product offerings. We seek engineers who are not only technically adept but also understand the importance of delivering outstanding products to our customers.

Join our dynamic Tech team at Ten Group as we embark on exciting new projects! We are looking for innovative and collaborative individuals who are ready to take on challenges and contribute to our growth.You might be the perfect fit if you:Desire to be part of an organization with a bold vision.Value agile methodologies and thrive in a collaborative environment.Have a portfolio showcasing your Git commits, live projects, and innovative solutions.Enjoy contributing to functional, technical, and organizational design.As part of your application, please share which area of technology aligns best with your skills and experience.

Your Impact The Principal Software Engineer plays a pivotal role in shaping and advancing our architectural framework by employing Distributed Domain Driven Design methodologies. This position is crucial for ensuring the resilience and scalability of our systems. You will influence architectural strategies and provide embedded consultation within projects, guiding teams to adopt best practices and effective design patterns. What You'll Do ● Architecture Leadership: Spearhead the definition and evolution of our architecture through Distributed Domain Driven Design principles. Serve as the strategic leader for core Architecture Quality Attributes (e.g., Availability, Performance, Scalability, Security) to guide architectural evaluations. Provide project-specific architectural consultation to advocate best practices, design patterns, and informed buy vs. build decisions.● Platform Capability Enhancement: Aid in prioritizing improvements across feature and data platforms. Enhance the documentation and communication of architectural descriptions through automation and innovative tools. Oversee platform-wide strategies, including naming conventions, protocol standards, and design patterns to ensure continuous value creation.● Effective Communication: Clearly articulate complex technical concepts in both written and verbal formats, tailored to both technical and non-technical stakeholders. Collaborate with various stakeholders to foster consensus when needed, ensuring alignment on architectural choices.

About the Team Join SumUp's Mobile Platform Squad as a Senior Android Engineer and play a pivotal role in the development of our rapidly expanding Android ecosystem. With substantial investments in our flagship products, we empower our feature teams to create world-class experiences. You will be crucial in establishing a robust foundation that allows over 40 Android engineers to maximize their productivity and efficiency, directly influencing the future of mobile payments for millions of merchants. Our engineering culture promotes autonomy, collaboration, and innovation. Your contributions will have a significant impact, connecting mobile engineers across the organization. This role is vital for: Eliminating Bottlenecks: Strategically addressing and resolving critical bottlenecks in CI/CD pipelines and app infrastructure that may hinder the delivery of new features and enhancements. Enhancing Developer Experience: Designing and implementing state-of-the-art tools and infrastructure that markedly improve the developer experience, reduce build times, and streamline workflows for our extensive Android engineering team. Modernizing a Mature Codebase: Leading the evolution and enhancement of our Android codebase, with an emphasis on code simplicity, maintainability, and overall health across all SumUp Android products. Ensuring Product Stability & Scalability: Offering foundational support and guidance across our diverse Android product portfolio, ensuring consistency, reliability, and smooth operation for products such as Register, Android Terminal, SumUp Go, and the Merchant app. What You’ll Do: Strategic Impact: Lead initiatives to shape the core experience for both merchants and our internal Android developers, directly contributing to SumUp's ambitious Android product roadmap. Technical Leadership: Architect, develop, and maintain critical tools, frameworks, and infrastructure that significantly enhance the consistency, scalability, and reliability of our mobile applications, ensuring no adverse effects across our various Android products. Performance & Efficiency: Drive initiatives in CI/CD systems, advanced developer tooling, and performance optimizations to dramatically streamline mobile development processes and reduce build times for our expanding team. Codebase Evolution: Proactively address technical debt, enhance code health, and introduce best practices to a complex, mature codebase, ensuring its long-term viability.

At GetGround, we strive to revolutionize property investment, making it safer, quicker, and more accessible for landlords. Our belief in AI's transformative power drives us to enhance the landlord journey, reimagining the entire process of property investing. Our vision is to disrupt the £1.7 trillion UK asset class, creating a future of buy-to-let that is distinctly innovative.We delve into the ideas, predictions, and data trends that will shape this evolving landscape and their implications for landlords and the PropTech industry.Our core values—no BS, pursuit of excellence, feedback obsession, and healthy ego—form the foundation of our culture, inspiring our team to deliver a world-class investment experience for our users.By the Numbers: 85+ GetGrounders (ex Google, Meta, Deliveroo, Startups) £2bn+ of assets under management 30,000+ users across 70 countriesSeries A with a strong runwayYour Role:As a Senior Full Stack Engineer, you will craft innovative solutions in a dynamic environment where technical excellence meets product thinking. Join one of our cross-functional product teams in London, collaborating closely to develop user-facing AI-native products that redefine software development.Our Work Culture:At GetGround, we prioritize AI not just in our products, but also in our coding practices, system reasoning, and professional growth as engineers. We seek Full Stack Engineers who are enthusiastic about collaborating across the technology stack and comfortable utilizing AI tools throughout both the discovery and delivery phases.What Matters to Our Engineers:Commitment to technical excellence, supported by rapid feedback loops and AI-enhanced workflows.Clear and thoughtful communication across code, documentation, and discussions.Eagerness to contribute to a high-performing team culture.

Join Hutch Games as a Junior Gameplay Programmer and embark on an exciting journey in the gaming industry! In this role, you will collaborate with a team of talented developers to create engaging gameplay experiences for our players. You will be involved in designing, implementing, and optimizing game mechanics.

Join Our Team as a Regional Technology Partners ManagerAt Cockroach Labs, we redefine technology disruption. Our flagship product, CockroachDB, empowers companies to seamlessly build and scale innovative applications. Join us in our mission to tackle significant challenges and create impactful solutions.The RoleWe are seeking a skilled Senior Manager to spearhead our Independent Software Vendor (ISV) partner sales strategies across the EMEA region. This pivotal role within the Alliances and Partnerships team will focus on enhancing and expanding our ISV partnership program. You will be responsible for identifying, recruiting, and cultivating high-impact partners while closely collaborating with sales, technical, and go-to-market stakeholders to drive revenue and pipeline growth.Success in this role requires a deep understanding of ISV partner dynamics, a proven track record in generating partner-led revenue, and a dedication to fostering long-term, collaborative partnerships. This position is based in London, UK.You WillDevelop and Execute ISV Partner StrategyDefine and implement a strategic roadmap for ISV partnerships in the EMEA region.

Join Us in Revolutionizing the Fashion Supply Chain!Did you know that the fashion industry generates over 100 billion garments each year, with a staggering 60% ending up in landfills? This occurs not due to a lack of demand but because the current supply chain for secondhand fashion is outdated, manual, and disorganized.At Fleek, we are on a mission to transform this broken system. Our goal is to make secondhand fashion the primary choice, and we are building the infrastructure that will power the global secondhand clothing market. This includes a B2B marketplace and advanced AI systems that will digitize the supply chain.With Fleek, vintage stores, online resellers, and retail buyers can easily source graded secondhand inventory directly from wholesalers and rag houses across various countries. Our innovative tool, FleekSort, utilizes AI to grade, price, and categorize items with just a photo, turning a historically opaque trade into a clear, searchable, and tradable global inventory.Since our inception in 2022, we've successfully diverted 9 million items from landfills and have experienced remarkable growth, tripling in size annually. We have secured approximately $50 million in funding from prestigious investors like a16z, Y Combinator, Burda Principal Investments, and HV Capital. Our advisory board boasts industry leaders from renowned companies such as Depop, Shopify, and Postmates.Today, we cater to thousands of resellers and retailers across the UK, Europe, and the US. As the secondhand fashion market is projected to reach $350 billion by 2027, Fleek is establishing the AI-driven operational and financial backbone for secondhand commerce on a global scale.We are looking for passionate individuals who are eager to create meaningful change and thrive in a fast-paced environment. If this excites you, read on!About the RoleAs a Senior Full Stack Engineer in our product engineering team with a focus on frontend development, you will report directly to our CTO, Sanket Agarwal (formerly of Google and Postmates). You'll collaborate closely with a product manager and designer within a small, senior team dedicated to enhancing user growth and optimizing the core consumer experience.Why This Role is UniqueAt Fleek, we are creating a vibrant, video-first marketplace where each item is one-of-a-kind, supply is unpredictable, and the purchasing experience must cater to both professional resellers making high-volume decisions and first-time buyers venturing into an entirely new market.You will be part of our Growth team, reimagining core user journeys from scratch, enhancing the discovery experience, streamlining the buying flow, and improving seller onboarding.

Join Us in Revolutionizing the Fashion Supply Chain!Every year, the fashion industry generates over 100 billion garments, with a staggering 60% ending up in landfills—not due to lack of demand, but because the supply chain for secondhand fashion is outdated and inefficient.At Fleek, we are committed to changing this narrative. Our mission is to position secondhand fashion as the preferred choice, by developing a robust infrastructure that supports the global secondhand clothing market through a B2B marketplace and AI-driven systems that digitize the supply chain.With Fleek, vintage shops, online resellers, and retail buyers can source high-quality secondhand inventory directly from wholesalers and rag houses across various countries. Our innovative solution, FleekSort, is an AI model specifically designed for secondhand fashion, enabling grading, pricing, and categorization of items with just a photo, transforming an opaque and manual trade into a clear, searchable, and tradable global inventory.Since our inception in 2022, we have rescued 9 million items from landfills and have seen our growth triple year-on-year. We have successfully raised approximately $50M from leading investors such as a16z, Y Combinator, Burda Principal Investments, and HV Capital, and recently completed our Series B funding round. Our advisors and private investors include key figures from Depop, Shopify, and Postmates.Currently, we cater to thousands of resellers and retailers across the UK, Europe, and the US. With projections of the secondhand fashion market reaching $350B by 2027, Fleek is poised to establish the AI-powered operational and financial backbone for global secondhand commerce.Are you ready to contribute to a cause that truly matters and drive change swiftly? If so, we want to hear from you!About the RoleWe are on the lookout for a highly technical and innovative Full-Stack Growth Builder who will redefine how customer lifecycle marketing propels growth at Fleek. This role transcends traditional CRM responsibilities; you will design and implement the entire system from data collection to strategic execution, making AI your primary toolkit.Your responsibilities will include creating intelligent CRM systems that identify the optimal timing, channel, and messaging for customer outreach, utilizing real-time user signals and context. You will also establish robust experimentation frameworks to accurately measure the impact of lifecycle messaging while avoiding over-attribution. Furthermore, you will spearhead the use of AI-driven content generation and personalization, ensuring a balance between scalability, quality, and relevance.As we scale our marketplace from thousands to tens of thousands of active buyers, you will be instrumental in building our data infrastructure in real-time.