Senior Backend Software Engineer

Intuition Machines is at the forefront of leveraging AI/ML technology to develop cutting-edge enterprise security solutions, including our renowned hCaptcha security suite. With a global team dedicated to making a difference, we are committed to building systems that support hundreds of millions of users worldwide. Our operational philosophy emphasizes minimal overhead, agile teams, and swift iterations.As a Senior Backend Engineer, your primary focus will be on enhancing our core production code, which may involve working with distributed systems and optimizing machine learning pathways. You'll play a crucial role in refining our evolving systems, improving threat models, and advancing our CI/CD practices.Key Responsibilities:Design, develop, and sustain secure, scalable backend services and algorithms.Implement DevSecOps methodologies, including security protocols, monitoring, metrics, and automated alerts.Create clean, well-documented, production-ready code with comprehensive test coverage.Enhance engineering practices through code reviews, automation testing, and on-call support.Transform complex requirements into actionable sprint tasks while providing mentorship to team members.Qualifications:A minimum of 5 years of relevant experience in a similar engineering role.Proficiency in backend development using Python and at least one of the following: Golang, Rust, or C++.Experience with Kubernetes, metrics-driven deployments, containerization, and microservices architecture.Familiarity with monitoring and tracing solutions.Expertise in key-value stores and SQL databases, with a focus on performance optimization.Experience with high-traffic, low-latency distributed systems, including queue-first architecture and sharding.Strong architectural skills, encompassing requirement gathering, problem-solving, and recommendations.Preferred Qualifications:Desire to learn and work with various technologies such as Python, Golang, Redis, PostgreSQL, Kafka, RabbitMQ, Clickhouse, Kubernetes, Helm, AWS, Azure, and JavaScript.Understanding of security frameworks, attack vectors, botnets, OLAP at scale, and online/active learning systems.Interest or experience in AI/ML and blockchain technologies.What We Offer:A fully remote position with flexible working hours.An inspiring global team of professionals.Modern development and deployment workflows: ship early, ship often.High impact: significant user base, satisfied customers, rapid growth, and cutting-edge R&D.A flat organizational structure allowing direct interaction with customer teams.We are dedicated to promoting equality of opportunity and fostering an inclusive environment for all team members.Join us in revolutionizing cybersecurity, user privacy, and machine learning!

At Intuition Machines, we harness the power of AI and machine learning to develop cutting-edge enterprise security solutions. Our innovative research impacts systems that serve hundreds of millions of users globally, supported by a diverse team working remotely across various locations. You may recognize us for our flagship product, the hCaptcha security suite. Our operational philosophy emphasizes minimal overhead, small, agile teams, and rapid product iterations.As a Senior Frontend Engineer, you will play a pivotal role in collaborating with team members, product owners, and key stakeholders to conceptualize, develop, and implement solutions that align with predefined requirements. You will oversee project deliverables, timelines, and stakeholder expectations, ensuring a seamless user experience through high-quality code that adheres to best practices in security and reliability. Staying abreast of market trends and innovations will be crucial in creating an appealing, consistent, and highly functional user interface.Key Responsibilities:Design, develop, and maintain secure, robust, scalable, and high-performance frontend web and mobile applications.Produce well-structured, maintainable, and thoroughly tested code that meets our high standards, suitable for open-source contribution.Enhance our global codebase through collaborative efforts including brainstorming sessions, code reviews, and unit testing.Translate complex customer requirements into actionable code for sprint pipelines, while providing mentorship and support to team members.Desired Qualifications:A minimum of 4 years of relevant experience in frontend development.In-depth knowledge of JavaScript, especially with frameworks such as React, for building intricate solutions.Demonstrated expertise in solution architecture and engineering, including requirements gathering and problem-solving skills.Strong communication and presentation skills, with experience mentoring and supporting peers from diverse backgrounds.Preferred Skills:Experience with WebGL, WebWorkers, or other modern web APIs.Familiarity with containerization tools like Docker and Kubernetes.Understanding of online security frameworks and annotation interfaces.What We Offer:A fully remote working environment with flexible hours.An inspiring global team of talented professionals.Modern development workflows that prioritize frequent deliveries.The opportunity to make a significant impact with a broad user base and engaged customers.A flat organizational structure allowing direct interaction with customer teams.We are dedicated to promoting equality of opportunity and fostering an inclusive atmosphere for all our team members.Join us in revolutionizing the fields of cybersecurity and user privacy.

At Intuition Machines, our security solutions are recognized and utilized by industry leaders across various sectors. One of our flagship products, the hCaptcha security suite, embodies our commitment to innovation and excellence. Our operational philosophy revolves around empowering small teams to achieve high agency and rapid iterations, with AI and Machine Learning driving our product offerings. Our globally distributed team is dedicated to building efficient systems that prioritize speed and reliability.As a Senior Backend Engineer within our Detection team, you will be vital in developing, supporting, and maintaining the essential tools and services of the hCaptcha application that focus on detecting and verifying user interactions. You will collaborate closely with Security and Machine Learning engineers to continuously enhance hCaptcha’s functionalities, utilizing programming languages like JavaScript and Go to tackle global user challenges.Your role will also encompass practicing DevSecOps, ensuring security implementations, monitoring, automation, and the management of production systems around your code. As a customer-centric organization, you will engage directly with both enterprise customers and startups, collaborating with our product, customer success, and sales teams.

Join us at Fever, the premier technology platform transforming culture and live entertainment worldwide!Our goal? To make culture and entertainment accessible to everyone. Utilizing our innovative technology and insights, we are changing the way individuals interact with live events. Each month, our platform captivates over 300 million users across more than 40 countries, empowering event creators through data and technology to innovate and expand their audience reach.Our achievements? We’ve collaborated with iconic brands such as Netflix, F.C. Barcelona, and Primavera Sound, delivering internationally awarded experiences backed by top global investors!We’re on the lookout for talented innovators who are ready to help shape the future of entertainment. Are you prepared to join us in this exciting journey?As part of our engineering team, you will support the development, enhancement, and maintenance of all Fever services, ensuring that more people can enjoy incredible experiences.

Join Azumo as a passionate Backend Engineer, where you will play a pivotal role in developing and enhancing high-performance, scalable backend systems in the realms of AI, NLP, and conversational software.This is a fantastic opportunity for candidates residing in Latin America, as we aim to build a strong team of local engineers.In this role, you will collaborate with a dynamic team of innovative engineers dedicated to AI computing. If you have a passion for designing and developing scalable, high-performance backend infrastructures using GO (Golang), open-source frameworks, and modern cloud technologies, you will thrive here.Responsibilities:Design, develop, and test robust server features and APIs.Integrate existing applications with third-party systems.Assess various technological approaches to problem-solving.

About CookUnity:At CookUnity, we believe that food should be a source of nourishment, inspiration, and connection. Founded in 2018, we are the pioneering platform that links individuals with exceptional chefs, delivering over 50 million meals annually across the country. Our meals are fresh, ready-to-eat, and crafted with care and passion, bringing culinary excellence right to your home.But we’re not stopping there. CookUnity is evolving into a dynamic marketplace with a singular mission: empowering chefs to feed the world.If this mission resonates with you, then you’ve come to the right place.About the Team:Fraîche is CookUnity’s premium smart fridge solution for workplaces, offering fresh, chef-crafted meals, snacks, and beverages available 24/7 right in the office. Employees can explore a diverse menu on the Fraîche mobile app to unlock the IoT-enabled fridge and enjoy their meals without pre-ordering. As part of CookUnity’s B2B division, Fraîche is redefining the dining experience in workplaces, transforming how employees eat at work.We are looking for a Senior Backend / Platform Engineer with robust backend engineering experience and the capability to contribute to our mobile app (approximately 70% backend / 30% mobile). In this role, you will enhance our platform capabilities that power the Fraîche experience, including backend services developed with PHP and Symfony, data systems (PostgreSQL, Elasticsearch), message queues, Redis, and infrastructure operations. Additionally, you will contribute to the Fraîche mobile app (Flutter preferred, React Native acceptable) for both hardware-aware and user-facing features. If you are passionate about backend development, platform reliability, automation, and creating products that seamlessly connect the digital with the physical, this position is perfect for you!

Join Bancoli (https://bancoli.com), a forward-thinking fintech company driven by a team of passionate professionals committed to crafting solutions that make a significant impact. Our focus on collaboration and innovation allows us to create products that enhance lives, and we pride ourselves on working swiftly yet thoughtfully to ensure our contributions are meaningful.We are in search of a Senior Backend Engineer specializing in automation to enhance our diverse, globally distributed team. In this pivotal role, you will be key in developing secure, scalable, and user-friendly fintech products that cater to thousands of businesses worldwide. This position is entirely remote.Your contributions will involve driving the evolution of innovative, AI-enhanced software. You will work on optimizing our international value-moving products, such as predictive services and multi-currency payment systems, ensuring they meet the highest standards for safety, privacy, and performance.

Position: Senior Backend Engineer (Node.js + AI Workflows)Location: Remote (Candidates must reside in Buenos Aires, Argentina)About Distro:• Distro is a forward-thinking fintech organization dedicated to pioneering AI-driven software solutions.• Our team culture fosters the use of AI to automate mundane tasks, empowering our engineers to concentrate on vital architecture and logic.Role Overview:• Spearhead and mentor AI agents in the development of our flagship products, dedicating approximately 75% of your time to this initiative.• Execute detailed backend engineering tasks and refine secure payment systems, allocating around 25% of your time to this critical function.• Serve as the orchestrator of an AI-enhanced development process, focusing on strategic initiatives rather than routine coding tasks.

About UsAt BriteCore, we are an innovative and progressive company dedicated to empowering Property & Casualty (P&C) insurers with state-of-the-art cloud-native technology that drives business growth and operational efficiency.Our comprehensive software platform is essential for our clients, enabling them to seamlessly manage policies, billing, and claims through an integrated core insurance solution that offers real-time analytics and digital portals for both agents and policyholders. While many still depend on outdated systems, we are at the forefront of the transition to modern cloud technology. With our unwavering commitment to continuous innovation, BriteCore consistently delivers new functionalities and improvements with a flexible and scalable insurance platform designed to adapt to the changing needs of insurers.We are dedicated to fostering an inclusive and collaborative workplace where team members are encouraged to voice their ideas, challenge conventional thinking, and develop both personally and professionally. Our remote team shares a common passion for revolutionizing the insurance industry and providing outstanding service.Join BriteCore and become part of a company that is defining the future of insurance technology. You will collaborate with skilled professionals and have the opportunity to make a significant impact. If you are ready to innovate and contribute to the evolution of insurance software, let’s build the future together.Position OverviewWe are expanding our team and seeking a Senior Python Backend Engineer to help shape the technological services for Property & Casualty (P&C) carriers. In this role, you will actively participate in modernizing and scaling critical platforms using Python and MySQL. This is a unique opportunity to work on cutting-edge AI technology that underpins P&C insurance operations, ensuring these platforms are dependable and future-ready.If you are passionate about solving intricate problems, excel in AI-driven environments, and possess a talent for developing secure and precise solutions for high-impact projects, we would love to hear from you.

Join our innovative team at rehire as a Senior Machine Learning Engineer, specializing in MLOps and Computer Vision. In this role, you will leverage your expertise to build and optimize machine learning systems, ensuring seamless integration and deployment of models into production. You will collaborate with cross-functional teams to drive the development of cutting-edge solutions that enhance our operational efficiency and deliver value to our clients.

At Intuition Machines, we leverage cutting-edge AI and machine learning technologies to develop innovative enterprise security solutions. Our products are designed to protect systems that support hundreds of millions of users worldwide, powered by a highly skilled and globally distributed team. Most notably, we are the creators of the hCaptcha security suite, a leading platform in the industry. Our philosophy centers around maintaining low overhead, fostering small teams, and embracing rapid iteration to enhance our offerings.As a Senior Cybersecurity Fraud Analyst, you will utilize your extensive knowledge in data analysis, financial transactions, and web traffic analysis to identify and investigate potential fraudulent activities on our hCaptcha SaaS security platform. Your role will be crucial in safeguarding our systems and enhancing our fraud detection capabilities.Key Responsibilities:Monitor, identify, and analyze data from various sources, including financial transactions and web traffic, to detect and respond to fraudulent activities.Conduct in-depth investigations into complex fraud patterns, utilizing behavior analysis and anomaly detection to assess risk and recommend appropriate actions.Collaborate with interdisciplinary teams, including Engineering, Product, and Customer Support, to bolster fraud detection and prevention strategies.Contribute to the development of fraud detection automation, dashboards, and reporting systems.Continuously audit and refine fraud detection measures to align with industry standards and best practices.Keep abreast of emerging fraud trends, technologies, and regulatory changes to ensure the effectiveness of our fraud prevention strategies.

Join our innovative team at Delivery Hero as a Backend Software Engineer, where you will play a pivotal role in developing robust backend solutions that enhance our delivery services. This exciting opportunity allows you to work with cutting-edge technologies and collaborate with a talented team dedicated to revolutionizing the way people receive their food.

ABOUT SQUIRESQUIRE is an innovative business management system tailored for barbers, shop owners, and their communities. Our mission is to empower artistry and independence without the burdens of business complexities. Through SQUIRE, we equip barbers at every stage with custom-branded tools and resources to attract and retain customers, streamline operations, and boost revenue.Established in 2015, SQUIRE is trusted by over 30,000 barbers in more than 5,000 shops across 1,000 cities globally. Our platform facilitates everything from seamless booking and shop openings to real-time earnings dashboards and fostering enduring customer relationships, enabling barbers to harmonize their artistic craft with their business aspirations.Discover more about us at getsquire.com or download the SQUIRE app on the App Store or Google Play.

About CookUnity:CookUnity was established in 2018 to revive the soul of food by connecting people with extraordinary chefs. Delivering 50 million meals annually, we prioritize fresh, ready-to-eat meals crafted with passion. Our innovative marketplace aims to empower chefs to share their culinary creations with the world.Join us on our mission to nourish the world through exceptional cuisine.About the Team:The Kitchen Tech Team is the backbone of CookUnity’s culinary technology innovations. We develop and maintain systems that enhance operational efficiency and quality. As part of the ChefOS Zone, we support the entire meal lifecycle—ensuring precise ingredient sourcing, nutritional data accuracy, and compliance with dietary preferences.Collaboration is key; we work closely with chefs, supply chains, and operations teams to integrate inventory management, order processing, and fulfillment systems. Our goal is to equip chefs with intuitive tools while maintaining efficiency and reliability in large-scale meal production.The Role:We are seeking a Staff Backend Engineer to join our dynamic team. In this position, you will design, build, and maintain scalable backend services that power our core recipe management functionalities. Collaborating with talented engineers, product managers, and designers, you will utilize Kotlin and Java, frameworks like Micronaut or Spring Boot, and integrate Temporal for workflow automation.This is an individual contributor (IC) role emphasizing backend architecture, performance, and scalability. If you thrive on solving complex challenges and optimizing workflows, we would love to hear from you.

Xometry (NASDAQ: XMTR) is at the forefront of modern manufacturing, seamlessly connecting innovative thinkers with manufacturers who can transform their visions into reality. Our digital marketplace equips manufacturers with critical resources for growth while enabling Fortune 1000 companies to access global manufacturing capabilities effortlessly.We are on the lookout for a Senior Machine Learning Engineer to join our dynamic team. The ideal candidate will elevate our machine learning capabilities and play a pivotal role in an organization where AI is central to our business strategy. Join a small, highly skilled team that takes pride in ownership of their work and thrives on continuous learning and coding. Your contributions will significantly impact the Xometry platform.

Join Qodea, a global technology group poised for the future, where you can engage in high-stakes projects that define your career. As part of our extraordinary team, you won't just tackle projects; you'll address challenges without clear solutions.Our elite roster of talent is sought after by global leaders, including Google, Snap, Diageo, PayPal, and Jaguar Land Rover, for those moments when deadlines seem insurmountable and when previous attempts have fallen short. You will deliver impactful solutions swiftly, operating at the confluence of technology, design, and human behavior.We are in search of individuals who exemplify:Innovation in overcoming complex challenges.Accountability for results.Unwavering integrity.Role OverviewAs a Senior Machine Learning Engineer at Qodea, you will work at the intersection of applied machine learning, large-scale data, and user-facing products. You will be responsible for designing, building, and deploying cutting-edge ML solutions that enhance user experiences while managing the entire ML lifecycle and ensuring seamless model integration in our production environments.Your Responsibilities:Utilize your expertise in statistical modeling and machine learning to conduct deep data analysis and feature selection.Deconstruct ML pipelines to enhance their robustness in real-world applications.Create and maintain data pipelines to prepare data for model training and evaluation.Design and implement A/B tests to assess model performance and its impact on business metrics.Establish and oversee model observability for tracking accuracy, bias, and drift.Collaborate with data engineers to ensure high-quality data ingestion for intelligent systems.Key Qualifications:Strong foundational knowledge of diverse ML algorithms and the ability to select the appropriate tool for each task.Hands-on experience with cloud-native ML services, preferably on GCP using Vertex AI.Proficiency in Python and its associated data science libraries.Experience with data storage technologies and their scalability characteristics.Excellent communication skills and the ability to thrive in ambiguous situations.Additional Skills:Experience with graph databases such as Neo4j.Familiarity with API development using REST or GraphQL.Experience deploying ML solutions in e-commerce or financial services.What We Expect:We are building a world-class delivery center in Buenos Aires and strive to attract the finest engineering talent in the region. We believe that the best work occurs through collaborative in-person engagement.

Join us as a Senior Backend Engineer at The Mobile-First Company, where we revolutionize business software for the mobile era. Our mission is to empower businesses to operate seamlessly from their mobile devices.As a key member of our team, you'll collaborate directly with our CTO to shape the future of our backend systems and AI capabilities. Your work will enhance the performance and scalability of our applications.In this role, you will:Develop and optimize backend systems in collaboration with mobile engineers.Contribute to system design and CI/CD processes.Implement scalable backend solutions using technologies such as Kotlin, Java, or Python.Work with cloud services including AWS and Cloudflare.Be part of a fast-growing company that is already serving over 20,000 businesses daily!

Join Our Team as a Backend EngineerAt Silver, we're on the cutting edge of technology, and we invite you to be a part of our innovative journey. As a Backend Engineer, you will have the unique opportunity to develop and enhance our backend services, tackling complex technical challenges that significantly impact our users' experience. We're seeking dedicated professionals who possess a robust product sense and are committed to long-term success.Your Responsibilities:Design and implement essential functionalities for our mobile applications, collaborating closely with product managers, mobile developers, platform engineers, and fellow backend engineers.Refine and optimize existing systems by addressing bugs, enhancing resource efficiency, and ensuring scalability.Deliver production-ready code and features to users on a regular basis, following an incremental development approach.Create tools to enhance our development practices and streamline workflows.Engage in code reviews to elevate the quality of our codebase and product offerings.Take full ownership of your code once it's in production.Collaborate with our Customer Experience team to resolve user issues related to the app.Qualifications:Proven experience running distributed systems in a production environment.Strong cross-team collaboration skills; our environment thrives on cross-functional teamwork.A beginner’s mindset with a relentless drive for understanding.Ability to take ownership of problems and actively seek solutions.Eagerness to engage with and resolve open issues.A flexible approach to problem-solving, ready to tackle whatever challenges arise.Technical Skills:Proficiency in Java 17.Experience with Kubernetes, and observability tools such as Honeycomb, Grafana, and Sentry.Familiarity with CI/CD pipelines for automated merges and deployments.Interview Process:Initial Screening Interview with Silver.Technical Interview with Silver.Client Screening Interview.Take-Home Challenge.System Design Interview.Behavioral Interview.

Join us at Webflow, where we are pioneering the world’s foremost AI-native Digital Experience Platform. As a remote-first organization, we prioritize trust, transparency, and an abundance of creativity. This dynamic role requires grit and a fast-paced approach, all while maintaining exceptional craftsmanship and quality. Our mission is to empower developers of all levels, from budding entrepreneurs to established enterprises, enabling them to design, launch, and optimize their web presence effortlessly. We envision a future for the web that is more open, creative, and equitable, and we invite you to be a part of this transformative journey.We recently announced our new office in Buenos Aires, and we are excited to have you as one of the inaugural members of the team. Not quite ready to apply? Stay connected and sign up here to be informed about upcoming opportunities and events with the Webflow team in Argentina. As a Senior Database Engineer, you will play a crucial role in ensuring our databases and supporting applications are high-performing, scalable, and reliable. This position merges your database expertise with a keen application-oriented mindset, ensuring that data layer modifications translate into enhanced product experiences.