Staff Software Engineer - Core Domain (Relocation to Milan)

Role overview Wix.com Ltd. seeks an AI-Native Software Engineer for its Kyiv office. The position centers on building and refining AI technologies that power the Wix platform and serve a global audience. What you will do Build and integrate AI-driven features within Wix products Collaborate with engineers and specialists to deliver reliable solutions Take part in projects that shape the future of web development at Wix Team and culture Work alongside experienced professionals who value practical problem-solving and new ideas. The team supports open communication and shared learning to strengthen both the platform and each member’s skills.

Join Our Team at IdealsIdeals is a renowned global B2B SaaS provider celebrated for being the most customer-focused brand in the secure business collaboration space. With over 2 million users across 300,000 companies worldwide, we empower organizations to manage high-stakes processes and make significant decisions with greater ease and efficiency.Ideals Virtual Data Room (VDR): Facilitating secure document sharing and collaboration for due diligence, fundraising, corporate reporting, licensing, clinical trials, and other intricate transactions.Ideals Board: A platform designed for board and leadership collaboration, ensuring faster, safer, and compliant decision-making.Your MissionWe are in search of a Backend Software Engineer (.NET) with AI skills who will be pivotal in developing and scaling our secure, high-load VDR services while also exploring the integration of AI patterns into our product features.Your success will be gauged by your strong backend fundamentals—reliability, performance, scalability, and maintainability—and your capability to implement AI features safely and efficiently using reusable, well-architected components.This role is hands-on within a mature product environment where engineering excellence, observability, and sustainable architecture are paramount.Key ResponsibilitiesBackend Engineering:Design, develop, and maintain high-quality production-grade .NET services.Utilize .NET Framework 4.7, .NET 8, ASP.NET, Web API, and Entity Framework.Create and refine data models with MS SQL Server and PostgreSQL.Deploy and manage services on AWS, leveraging Docker, Kubernetes, and ArgoCD.Ensure service reliability and performance through:Defining clear SLIs, SLOs, and capacity planning.Implementing caching, retries, backoff strategies, and circuit breakers.Establishing secure multi-tenant access control.Take ownership of services from design through implementation, deployment, monitoring, and support.

Join us at Superhuman, where we embrace a vibrant hybrid work model that balances focused individual work with collaborative in-person sessions. This unique approach cultivates trust, sparks innovation, and strengthens our team culture.About SuperhumanSuperhuman, the parent company of Grammarly, is an AI-driven productivity platform dedicated to unlocking everyone's superhuman potential. We integrate AI seamlessly into the tools people already use, connecting with over 1 million applications and websites. Our product suite includes Grammarly's writing assistance, Coda's collaborative workspaces, Mail's inbox management, and Go, our proactive AI assistant that understands context and provides automatic help. Since our founding in 2009, Superhuman has empowered over 40 million users across 50,000 organizations and 3,000 educational institutions worldwide, helping them eliminate busywork and concentrate on what truly matters. Discover more at superhuman.com and explore our values here.The OpportunityTo meet our ambitious objectives, we are seeking talented Full-Stack Software Engineers to be a part of our engineering teams.As an engineer at Superhuman, you will have the freedom to innovate and drive breakthroughs that will influence our product roadmap. Our technical challenges are evolving rapidly as we scale our interfaces, algorithms, and infrastructure. For more insights, check out our technical blog.In this role, you will take on a pivotal position in enhancing user acquisition and conversion. You will develop innovative features and infrastructure that highlight our product's value, encouraging millions of users to make Superhuman their indispensable writing companion. We welcome you to share your knowledge, experiences, and aspirations with us to ensure the best fit for our team. What is your superpower?Your responsibilities will include:Commencing code development and deployment in your first week, delivering impactful features within your initial months.Building and maintaining production services with high activity on the back-end while crafting rich user interfaces on the front-end.Aiming for high availability for both consumer and enterprise customers.Gaining expertise in infrastructure as code (IaC).Collaborating with internal teams such as Core, Enterprise, Trust, and Data to create delightful user experiences.

Superhuman embraces a flexible hybrid working model for this position, allowing team members to enjoy focused work time while also benefiting from in-person collaboration that nurtures trust, innovation, and a robust team culture.About SuperhumanSuperhuman, which includes Grammarly as part of its offerings, is an AI-driven productivity platform dedicated to unlocking the superhuman potential in everyone. Our suite of applications seamlessly integrates AI into daily workflows, connecting with over a million applications and websites. Our flagship products feature Grammarly’s writing assistance, Coda’s collaborative workspaces, Mail’s inbox management, and Go, the proactive AI assistant that offers contextual help automatically. Since our founding in 2009, Superhuman has empowered more than 40 million individuals, along with 50,000 organizations and 3,000 educational institutions worldwide, to eliminate busywork and concentrate on what truly matters. Discover more at superhuman.com.The OpportunityAs we pursue ambitious goals, we are seeking a Site Reliability Engineer (SRE) to join our infrastructure team. This role will focus on developing software to guarantee the reliability of our backend systems, collaborating closely with engineers in charge of these systems, and strategizing for our future expansion. You will collaborate with our existing production engineering teams in the EU as we shift from a “you build it, you own it” paradigm.At Superhuman, engineers and researchers are encouraged to innovate and discover breakthroughs, which directly impacts our product roadmap. As we scale our interfaces, algorithms, and infrastructure, the complexity of our technical challenges is rapidly increasing. Explore more insights from our team on our technical blog.As an SRE, your responsibilities will include:Scaling our Kubernetes-based control plane that handles billions of events daily.Enhancing our automation mechanisms to respond effectively to workload demands.Implementing Machine Learning systems across the organization.

Join our innovative team at Sigma Software Group as an AI Solution Architect. In this pivotal role, you will design and implement advanced AI solutions that drive efficiency and enhance decision-making processes within various industries. Your expertise will be crucial in translating complex business requirements into scalable AI architectures.We are looking for a visionary architect who can leverage their deep understanding of AI technologies to lead projects from conception through deployment. Collaborate with cross-functional teams to deliver state-of-the-art solutions that meet our clients' evolving needs.

Superhuman offers a vibrant hybrid working model for this position. This flexible approach allows our team members to enjoy focused work periods while also benefiting from in-person collaboration that nurtures trust, innovation, and a robust team culture.About SuperhumanSuperhuman, now part of Grammarly, is an AI productivity platform dedicated to unlocking the extraordinary potential within everyone. Our suite of applications and agents integrates AI into everyday workflows, collaborating with over 1 million applications and websites. Our offerings include Grammarly's writing assistance, Coda's collaborative workspaces, Mail's inbox management, and Go, a proactive AI assistant that understands context and delivers timely help. Established in 2009, Superhuman empowers over 40 million individuals, 50,000 organizations, and 3,000 educational institutions globally to eliminate busywork and concentrate on what truly matters. Discover more at superhuman.com and explore our values here.The OpportunityTo meet our ambitious objectives, we are seeking talented Back-End Software Engineers to join our engineering teams. Superhuman's engineers and researchers are empowered to innovate and discover breakthroughs that shape our product roadmap. As we scale our interfaces, algorithms, and infrastructure, we are faced with increasingly complex technical challenges. You can learn more about our work on our technical blog.As a Back-End Engineer at Superhuman, you will be instrumental in developing the core components of our product offerings, infrastructure, and features that assist 30 million users in writing with clarity and effectiveness every day.In this role, you will:Begin writing and deploying code in your first week and launch impactful features within your initial months.Develop and maintain production services with high call rates.Aim for high availability for both consumer and enterprise clients.Learn to build infrastructure as code (IaC).Collaborate extensively with internal teams like Core, Growth, Enterprise, Trust, and Data to deliver exceptional product experiences.Contribute to an engineering culture that prioritizes documentation, testing, and user experience.Assess existing systems and technologies while proposing enhancements.

Join a forward-thinking team at Superhuman, offering a hybrid work model for this internship. This flexible structure allows team members to enjoy focused work while also collaborating in person, promoting trust, innovation, and a robust team culture.Interns must be based in Ukraine and can work remotely, with opportunities to gather in our Kyiv office throughout the internship.About SuperhumanGrammarly is now part of Superhuman, an AI productivity platform dedicated to unlocking extraordinary potential in everyone. The Superhuman ecosystem integrates with over 1 million applications and websites, delivering tools like Grammarly’s writing assistant, Coda’s collaborative workspaces, Mail’s inbox management, and Go, the AI assistant that anticipates needs and provides contextual help. Established in 2009, Superhuman serves over 40 million individuals, 50,000 organizations, and 3,000 educational institutions globally, helping them eliminate busywork and concentrate on what truly matters. Discover more at superhuman.com and learn about our values here.The OpportunityAs we pursue our ambitious objectives, we seek Software Engineering Interns to join our Engineering team for a three-month period during the summer of 2026 (June 23 - September 11, 2026). Interns will engage in diverse projects across front-end, back-end, full-stack, and mobile engineering. In this role, you will face exciting technical challenges and gain valuable experience delivering features to millions of users.Our engineers and researchers enjoy the freedom to innovate and drive significant advancements, influencing our product roadmap. As we grow, the complexity of our technical challenges is rapidly increasing, covering our interfaces, algorithms, and infrastructure. Explore more insights from our team on our technical blog.As a Software Engineering Intern, you will be instrumental in overcoming Superhuman’s key Engineering challenges. Responsibilities include:Contributing to an end-to-end Engineering project aligned with your team’s strategic objectives.Delivering code within your first few weeks.Adapting swiftly in a dynamic environment and offering your unique insights to enhance product direction.

At AppsFlyer, we place data at the core of our operations, processing over 150 billion events daily, and we’re rapidly expanding. Our dedicated team builds the essential frameworks that support this growth. Unlike conventional Data Engineering teams, we function as a Software Development team, creating internal services and tools for Data Engineers and other Software Development teams. We are at the forefront of transitioning from a Data Lake to a Data Mesh architecture, providing: Massive-scale data ingestion services Data operations within a Mesh architecture Tools that empower other teams to create reliable, cost-effective, and high-performing data pipelines By working at the intersection of Software Engineering, Data Engineering, and DevOps, we design, build, and maintain the core services that drive AppsFlyer’s data ecosystem.

Important: This position requires relocation to our Milan office.About SatispaySatispay is on a mission to transform everyday payments, making them simple, equitable, and accessible for everyone. Our vision extends beyond the present as we strive to shape the future of financial transactions.We are a movement that empowers millions, united by a common goal to confront significant challenges. Our agile approach allows us to innovate rapidly, think creatively, and learn collaboratively as we push boundaries.If you seek to make a meaningful impact alongside a talented team, you have come to the right place.Key ResponsibilitiesAs a Senior Backend Software Engineer within the Business Team, you will significantly influence the future of digital welfare payments. Your responsibilities will encompass everything from employer benefits to sophisticated products, supporting the entire journey for both employers and employees to ensure lasting satisfaction. You will guide the technical direction, maintain quality, and ensure the timely delivery of complex systems that enable numerous employers to manage their corporate welfare efficiently. Here’s what you can expect in your daily tasks:Develop Multi-Service Solutions: Conduct thorough technical analyses for medium-to-large projects affecting various services in the Employer domain. Design comprehensive, highly available solutions, emphasizing scalability, security, and maintainability for products central to welfare.Guarantee Technical Quality: Implement strong testing strategies, balancing both automated and manual coverage while managing gradual rollouts with vigilant monitoring to ensure precise welfare distributions.Identify and Resolve Blockers: Proactively foresee and address technical obstacles, promoting knowledge sharing throughout the organization. Tackle the unique challenges posed by B2B registration workflows and high-volume benefit allocations while ensuring code quality through active reviews.Take Ownership: Own your projects from inception to completion, delivering features that genuinely address user needs—from the moment an employer signs up to when an employee utilizes their welfare benefits—through seamless and efficient back-end integration.

Join our dynamic team in Kyiv, Ukraine, where you will work full-time in our modern office. We provide a convenient shuttle service from the nearest metro station for your ease.About the RoleAs a Senior Embedded Software Engineer, you'll play a pivotal role within our Architecture team, focusing on the development and implementation of essential features that enable our drones to operate safely and autonomously in the skies. Collaborating with our elite team of seven members, you'll push the boundaries of drone technology while working closely with stakeholders in Germany and the US across System Architecture and Hardware Development.Your Daily Responsibilities:Develop, maintain, and optimize the Quantum-Systems autopilot firmware and its associated stack.Design, conceptualize, implement, and test new autopilot functionalities.Export flight control and navigation algorithms from MATLAB/Simulink and integrate them into the autopilot's embedded framework.Implement, maintain, and optimize BSP/peripheral and external sensor drivers for real-time operating systems.Document and maintain autopilot firmware for flight tests, including creating flight test tickets, supporting flight tests, and analyzing post-flight data.Create unit tests and debug/troubleshoot the codebase to ensure comprehensive code coverage and functionality testing.Oversee the firmware update ecosystem, including bootloaders and firmware updates.Assist in the implementation and maintenance of production tools.

Quantum Systems is at the forefront of developing next-generation unmanned solutions that operate across air, land, and sea. Our innovative systems, which range from advanced aerial drones to underwater and ground platforms, integrate state-of-the-art hardware with AI-powered software to provide seamless control and real-time data insights. We are proud to be a trusted partner for defense, security, and public sector clients globally, continuously pushing the boundaries of mission versatility and performance.Since establishing our local office in Ukraine in 2022, we have been a strong supporter of the country’s progress and innovation.The position is located in Kyiv, and we expect you to be present full-time in the office.Your Daily Responsibilities:Lead a team of Machine Learning Engineers.Design, develop, and enhance real-time object detection and tracking models for aerial video captured by UAVs (using EO/IR cameras).Implement optimized inference pipelines tailored for edge hardware (e.g., NVIDIA Jetson, Orin).Conduct model training, testing, benchmarking, and validation in real flight environments.Integrate AI models into onboard systems.Collaborate with software and hardware teams to ensure robust end-to-end performance.Research and apply cutting-edge deep learning techniques in computer vision.

Become a pivotal member of our Chatbot team at Wix, where your expertise in AI technology will help revolutionize customer experiences. As a Senior AI Server Engineer, you'll be responsible for the creation of sophisticated, context-aware features that will transform our Customer Care Chatbot into an essential resource for users navigating their Wix journey. Your role will encompass the entire development cycle—from exploring cutting-edge AI methodologies to implementing scalable features that provide meaningful value to millions of users.You will:Architect, develop, and integrate advanced AI functionalities utilizing the latest LLM and NLP technologiesEngage in research and experimentation to discover innovative solutions and apply high-level models to real-world customer care challengesTake full ownership of feature development, collaborating with product teams to define requirements, estimate scope, implement solutions, and monitor performanceOptimize system performance, stability, and reliability to ensure an uninterrupted, high-quality serviceParticipate in architectural and technical discussions aimed at enhancing system design and developer experience

Our Mission and VisionAt Solidgate, we are dedicated to empowering exceptional entrepreneurs to create outstanding internet companies. Our goal is to support the builders of the digital economy with the financial infrastructure they truly deserve. We are on an ambitious journey to become the world's leading payments orchestration platform.About the Team and RoleAs a Node.js Engineer on the Launch Team, you will be instrumental in powering the backend for Digital Onboarding. Your primary mission will be to ensure that Solidgate collaborates with compliant merchants while delivering a fast, seamless, and scalable onboarding experience.Your challenge will be to construct the quickest path from “I’m interested” to “I’m live.”What Makes This Role UniqueYou will significantly decrease Time-to-Live, positively influencing growth.You will help define the evolving Node.js stack (free from legacy constraints).You will design robust, durable, and scalable systems that target an impressive 99.99% uptime.You’ll harness AI to expedite shipping and integrate AI-driven features into our products.Technology StackOur Launch Team is at the forefront of Solidgate's Node.js stack development. We not only implement tools but also establish the standards, practices, and engineering culture that other teams aspire to follow. Currently, we utilize:Fastify - a lightweight, high-performance web servergRPC + Protobuf - for typed service-to-service communicationPostgreSQL + Drizzle ORM - a reliable data layer with a modern query builderKafka (@platformatic/kafka) - for streaming-first, event-driven architectureVitest - for unit and functional testingWe also implement custom solutions, including distributed locks, metrics, streamers, and more. Discover our complete technology stack here.The tech stack is continuously evolving, providing real influence without any legacy baggage, just modern Node.js supported by mature architectural principles inspired by the Golang ecosystem.Your ResponsibilitiesDevelop and maintain backend services for a seamless onboarding process.Collaborate with cross-functional teams to ensure high-quality deliverables.Optimize application performance and reliability.Leverage modern development practices and tools to enhance efficiency.

Speechify seeks an iOS Core Product Software Engineer based in Kyiv, Ukraine. The position centers on creating and refining iOS applications that support users in reading more easily and effectively. Teamwork is a key part of the day-to-day, with frequent collaboration across different specialties. Role overview This engineer will play a direct role in shaping the core iOS experience for Speechify’s users. The work involves both building new features and enhancing existing ones, always with a focus on reliability and usability. What you will do Design, develop, and test new features for Speechify’s iOS apps Work with cross-functional teams to deliver reliable software Contribute to the deployment of high-quality solutions for a global user base

Join our innovative team at Sigma Software Group as a Data Engineer! In this dynamic role, you will leverage your expertise in data architecture and engineering to design and implement robust data solutions that drive informed decision-making across various projects.As a Data Engineer, you will collaborate with cross-functional teams to understand data requirements, develop data pipelines, and ensure data integrity and accessibility. Your work will empower stakeholders to derive valuable insights and contribute to the overall success of our projects.

Atto Trading is an innovative quantitative trading firm leading the charge in global high-frequency trading strategies. We are on the lookout for a skilled C++ Software Engineer to become a vital part of our expanding team.This role offers the flexibility of remote work from Ukraine, with occasional in-office attendance in Kyiv as circumstances permit.Our international team is diverse, comprising experts in trading, statistics, engineering, and technology. Our structured approach, combined with rapid feedback from the market, enables us to swiftly transform concepts into profitable solutions. Working in our collaborative environment allows us to tackle some of the most challenging issues in the industry together. As a small firm, we maintain agility and uphold the highest standards of integrity, creativity, and dedication.Your Responsibilities:Architect and implement performance-critical components for our large-scale trading infrastructure.Develop high-frequency trading (HFT) systems in C++ focusing on low latency and unwavering reliability.Produce modern, efficient code based on the latest C++ standards.Engage directly with cutting-edge networking hardware using kernel-bypassing drivers.Conduct performance research aimed at enhancing the speed and scalability of our platform.Qualifications:Minimum of 3 years of direct experience in C++ development.In-depth understanding of C++ standards (C++14, C++17; C++20 knowledge is highly desirable).Practical experience with Python and/or Bash scripting.Familiarity with Linux operating systems and system-level programming.Strong understanding of multithreading, IPC, and concurrent systems.Proven ability to optimize latency and throughput, including experience with profiling and PGO.Knowledge of object-oriented programming and software design patterns.Bachelor’s degree in Computer Science, Computer Engineering, or a related technical discipline.Meticulous attention to detail, coupled with a critical and quality-oriented mindset.Able to work independently or within small teams in a fast-paced environment.Excellent communication skills and upper-intermediate (or higher) proficiency in English.A genuine curiosity and passion for financial markets and trading.Preferred Qualifications:Experience in developing high-performance, low-latency systems on Linux.Familiarity with operating system internals and kernel-level networking.Understanding of financial instruments such as stocks, ETFs, futures, or options.Knowledge of protocol-level networking (TCP/UDP/IP stack insights are a plus).Benefits:Competitive compensation package.Performance-based bonus opportunities.Healthcare and sports/gym budget.Mental health support, including access to therapy.Paid time off (25 days).Relocation support (where applicable).

Join Quantum Systems as an AI Computer Vision Engineer in Kyiv, where you'll be part of a dynamic team pushing the boundaries of aerial data technology. This full-time position is office-based, and we provide a convenient shuttle service from the nearest metro station.Your Daily Responsibilities:Design, develop, and enhance real-time object detection and tracking models tailored for aerial video captured by UAVs equipped with EO/IR cameras.Implement optimized inference pipelines for edge hardware platforms such as NVIDIA Jetson and Orin.Conduct model training, testing, benchmarking, and validation in authentic flight conditions.Integrate advanced AI models into onboard systems to improve functionality.Collaborate with software and hardware teams to ensure seamless end-to-end system performance.Research and apply leading-edge deep learning techniques within the field of computer vision.

Quantum Systems GmbH seeks an Embedded Software Quality Assurance Engineer to join its R&D team in Kyiv. This is a full-time, office-based role focused on maintaining the quality and reliability of advanced drone software. The position involves close collaboration with development engineers and a strong commitment to thorough testing practices. Role overview The engineer will design and execute verification strategies for embedded software, covering low-level firmware, device drivers, and flight control systems. Responsibilities span the entire test design process, from initial requirements through to automated hardware-in-the-loop (HIL) regression testing. A key focus is ensuring safety and deterministic behavior across all software releases. What you will do Translate system and safety requirements into testable specifications, acceptance criteria, and traceability matrices for embedded components. Design and implement automated testing frameworks for firmware. Build and maintain HIL test benches using tools such as power supplies, oscilloscopes, logic analyzers, and RF signal generators. Develop board bring-up test suites for bootloaders, secure boot, installation and upgrades, and peripheral self-tests. Oversee regression pipelines, including containerized runners, artifact retention, flaky test triage, trend reporting, and release quality gates. Introduce fault-injection and negative testing to validate fail-safe behaviors. Work with the Embedded Development Team to isolate root causes using traces, logic captures, and on-target debugging. Review and optimize existing test cases. Expand test coverage methodically. Provide quality reports within your area of responsibility. Participate in project meetings and contribute technical insights. Document findings and best practices in the Knowledge Base. Location This position is based in Kyiv, Ukraine. On-site presence is required.

Join our innovative AI Creation Team at Wix Harmony, the forefront of Wix's AI-driven website development. We are dedicated to crafting the essential elements that empower AI to construct real, functional websites.Your Role:Develop high-quality and scalable code using React and TypeScript.Design and implement new features from conceptualization to production.Review code changes and uphold rigorous engineering standards.Collaborate effectively with product managers, designers, and other engineers to deliver AI-enhanced products.Tackle complex challenges in both frontend and backend (Node.js) development.Engage in technical discussions, make architectural decisions, and contribute to continuous improvement initiatives.