Senior/Lead Backend Engineer (Node.js) at Skelar | Kyiv

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 Virt…

About UsAt Ideals, we are a pioneering global B2B SaaS company, acclaimed as the most highly rated and customer-centric brand in the secure business collaboration arena. With over 2,000,000 users spanning 300,000 companies worldwide, we empower teams to navigate high-stakes processes and make critical decisions with enhanced efficiency, reduced stress, and superior quality.Ideals Virtual Data Room (VDR): A secure platform for document sharing and collaboration, essential for due diligence, fundraising, corporate reporting, licensing, clinical trials, and various intricate transactions.Ideals Board: A collaborative platform designed for board and leadership teams to make decisions more quickly, safely, and in compliance with regulations.The RoleWe are on the lookout for a Senior Backend Engineer (.NET) to join our Orion Team, a vital component of our organization. This team is responsible for the essential file management backbone of the Ideals VDR, which includes:File conversion pipelinesAdvanced watermarking solutionsAI-driven document classification systemsHigh-performance document viewing experiencesTeam Composition: Our team consists of 2 Backend Engineers, 2 Frontend Engineers, 2 QA Engineers, an Engineering Manager, a Tech Lead, an Architect, a Product Manager, a Designer, and a Content Manager.Technology Stack: Our technology stack includes .NET Framework 4.7, .NET 8, ASP.NET Core, Entity Framework, Web API, MS SQL Server / PostgreSQL, AWS, Docker/Kubernetes, ArgoCD, and Git.Your ResponsibilitiesEngage in all phases of the Software Development Life Cycle (SDLC) as part of a cross-functional product team, including but not limited to requirements analysis, design, implementation, testing (unit, integration, and service tests), deployment, and operational management of new product features, as well as addressing change requests, defect resolution, spikes, and proof-of-concept development.Maintain high-quality standards in all deliverables.

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 innovative Game Development studio as a Senior Backend Developer specializing in .NET. We are seeking a seasoned professional who possesses a profound understanding of server architectures, real-time load handling, and cloud infrastructures. This position is ideal for an individual eager to build the backend for a new mobile game targeting Android and iOS platforms from the ground up, shaping the technological foundation of the product and making pivotal technical decisions.

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.

Role overview Wix Payments seeks a Backend Engineer based in Kyiv to strengthen the systems behind payment processing for Wix users. The focus is on backend development, supporting smooth and reliable transactions across the platform. What you will do Design, build, and maintain backend features for the Wix Payments platform Collaborate with colleagues from other teams to deliver dependable payment services Help improve the stability and efficiency of transaction processing Impact This role directly supports secure and seamless payment flows for Wix users. Enhancements made here will influence the reliability and performance of payment operations throughout the platform.

SKELAR is a venture builder dedicated to creating international product-oriented IT companies following the principles of the venture capital world. Together with co-founders, we assemble strong teams to launch product-focused IT businesses and excel in global markets.Currently, we are in search of a Senior Backend Engineer for our partner company.This platform focuses on personal and spiritual growth, built on Christian values. We assist individuals in finding answers to life’s most significant questions: from a deeper understanding of faith to enhancing relationships through personalized plans. Our users have access to lessons, interactive quizzes, and video materials, creating a holistic learning experience.Our strategy is to become a global platform where tens of millions of Christians, hundreds of organizations, and thousands of mentors and pastors can interact.Key Achievements We Are Proud Of:Users love us: our average rating on App Store, Google Play, and Trustpilot is 4.7/5.We are rapidly growing: our team has increased fourfold in the last year.We are a partner of Meta, confirming the high level of our product and the trust of technological leaders.We are evolving at an incredible pace, providing every team member the opportunity to grow rapidly alongside the company—both professionally and personally. The company supports learning through mentoring, internal educational initiatives, and access to external courses.It is worth noting that we extensively integrate AI tools into all processes. We are already utilizing integrations with MCP servers in daily tools, AI Code Review, and automation of key routine tasks. This allows us to focus on creativity and innovation instead of routine tasks.

About the Role Vacancies is looking for a Manual QA Engineer based in Kyiv. This position centers on backend testing and verifying email functionality to help maintain product quality and reliability.

SKELAR is a dynamic venture builder dedicated to creating international product IT companies guided by the principles of venture investing. Together with co-founders, we assemble strong teams to launch product-focused IT businesses and excel in global markets.We are currently seeking a Junior/Middle Backend Engineer to join our partner company.This platform is designed for personal and spiritual development, based on Christian values. We assist individuals in finding answers to life's most significant questions, from deepening their faith to enhancing relationships with loved ones through personalized plans. Our users gain access to lessons, interactive quizzes, and video materials that create a comprehensive learning experience.Our strategy is to become a global platform where tens of millions of Christians, hundreds of organizations, and thousands of mentors and pastors can interact.Key Achievements We Are Proud Of:Users love us: average ratings in the App Store, Google Play, and Trustpilot are 4.7/5.We are growing rapidly: our team has quadrupled in the past year.We partner with Meta, which affirms the high quality of our product and the trust of technology leaders.We are evolving at an incredible pace, and every team member has the opportunity to grow rapidly alongside the company, both professionally and personally. The company supports learning through mentoring, internal educational initiatives, and access to external courses.Notably, we extensively integrate AI tools into all processes. We already utilize integrations with MCP servers in everyday tools, AI Code Review, and automation of key routine tasks. This allows us to focus on creativity and innovation rather than routine.

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.

SKELAR is a prominent Ukrainian venture builder dedicated to developing international tech businesses. Together with our co-founders, we assemble strong teams poised to achieve success in global markets.Currently, SKELAR manages numerous businesses across various niches, from EdTech to marketplaces. Our companies consistently rank among Ukraine's top startups and product companies, achieving high positions in the App Store and developing platforms used by millions worldwide. Major media outlets, including TechCrunch and Wired, feature SKELAR's businesses.We take pride in our robust team of over 1,000 specialists, each bringing exceptional expertise and ambitious goals. Our people are our most valuable asset, and we aim to build businesses with the best talent available.Storyby is an entertainment tech company that transforms original ideas into captivating stories told through novels, vertical films, and immersive audiobooks. Over 10 million people globally engage with our content.In the Storyby ecosystem, we offer three key products:AlphaNovel – a platform for novels and immersive audiobooks featuring over 20,000 works.StorybyWriter – a publishing platform for more than 25,000 authors, bringing the strongest stories to life for DramaShorts.DramaShorts – a streaming service for vertical cinema with 1 million fans monthly, featuring in-house productions across Europe and the USA.We are currently expanding our team and looking for a Backend Engineer who will be a vital part of our team, helping the business grow and reach new heights.Your responsibilities will include:— Implementing and maintaining API endpoints for web and mobile: HTTP Cloud Functions, validation, OpenAPI/Swagger.— Optimizing performance: profiling, caching, and ensuring correct indexing for swift operation.— Ensuring quality and reliability: unit and integration testing (Jest), logging, tracing, alerts.— Conducting code reviews and upholding engineering standards in a monorepo (Nx, esbuild, CI).— Engaging in foundational infrastructure work using Terraform and participating in incident analysis.What we value:— You possess 3+ years of backend development experience with Node.js and TypeScript/JavaScript.— You have a strong understanding of SQL beyond basic SELECT queries, including indexing, profiling, and optimization.

Hello!We are on the lookout for a talented Junior/Middle Software Engineer specializing in Go to join Guru Apps (part of Universe Group) – a thriving iOS ecosystem with over 100 million downloads across 186 countries (including Cleaner Guru, Scan Guru, and Visify) and an impressive average rating of 4.6 on the App Store.This is an opportunity focused on progressive development, as nearly all new backend services and products within our ecosystem are launched using Go, featuring high-load capabilities in production, complex business logic, and direct impact on a million-strong audience.You’ll fit right in if you’re eager to:Develop new backend services in Go for products with a global audience while working on Core systems that serve all ecosystem products.Design high-load solutions and witness their real-world performance in production— from initial release to scaling under millions of loads.Take full engineering ownership – from architectural decisions to releases, stability, and ongoing service evolution.Enhance your technical expertise by working with high-load architectures and modern tech stacks (Go, Kubernetes, AWS, Prometheus, OTEL), integrating cutting-edge approaches in backend development.Make a tangible impact on the product – we value engineering insights and technical suggestions, with your contributions directly reflected in products that reach millions.Collaborate within an ambitious team of like-minded peers who don’t just write code but build scalable solutions, sharing knowledge and best practices across the Universe Group.Thrive in a fast-paced decision-making environment – minimal bureaucracy, extensive collaboration, and real influence without lengthy approvals.Challenges you will tackle with your future colleagues:Development of analytical and marketing platforms, which form the basis of user attribution, event processing, and product and business decision-making...

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.

TENTENS Tech is a dynamic IT partner of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We design social discovery platforms catering to over 20 million users globally. Our rapid pace and scale are driven by deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech comprises over 250 professionals, where each member acts like a CEO in their role, contributing to our collective success. We operate with a 10/10ths mindset: we stay focused on our goals, ask the right questions along the way, and never settle for 'good enough'—only maximum performance and continuous improvement. If you resonate with this description and are ready to accelerate with us, let's connect!We are currently seeking a Backend Engineer (PHP) to elevate our performance standards together.

Our Mission and VisionAt Solidgate, our mission is straightforward: to empower exceptional entrepreneurs in building outstanding internet companies. We exist to support the builders — those who are shaping the digital economy — with the robust financial infrastructure they need. Our ambitious goal is to become the leading payments orchestration platform globally.About the Team and RoleWe are in search of a talented Backend Engineer eager to transition to Go and join our team dedicated to creating products that minimize fraud-related risks for our clients. You'll be working on our innovative Representment product, which has the potential to save our merchants significant amounts of money.If you excel in a high-performing team that prioritizes speed, ambition, and ownership, then this is your opportunity. Our culture is rigorous, transparent, and highly collaborative. It may not be for everyone — but if you're ready to elevate your game alongside equally motivated colleagues, this is where you belong.Explore our technology stack here.Your ResponsibilitiesDevelop dispute management systems. Create services that gather dispute data from payment systems and convert it into actionable insights for merchants.Integrate with leading global payment providers. Collaborate with platforms like Stripe, Adyen, and PayPal.Build scalable financial infrastructure. Contribute to systems that facilitate invoicing, billing, reconciliation, and other financial functions.Launch new payment products. Collaborate with partners such as Visa, Mastercard, and AMEX to deliver innovative solutions.Enhance the Representment product. Develop APIs and interfaces that allow merchants to upload dispute evidence and submit it directly to payment schemes.Ideal Candidate ProfileDemonstrates strong ownership and a clear technical perspective (you have mastered one backend language and are ready for a new challenge).Produces production-ready systems, not just individual features.Possesses a solid understanding of high-load system design.Confident in testing (unit tests, integration tests).

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.

TENTENS Tech is a partner IT company of SKELAR, a Ukrainian venture builder focused on creating international tech businesses.We develop social discovery platforms for over 20 million users worldwide, driven by deep expertise in analytics, high-load systems, and performance marketing.Our team at TENTENS Tech consists of over 250 professionals, each acting as a CEO in their role and contributing to collective success. We adhere to the 10/10ths philosophy: we stay focused on our goals, ask the right questions along the way, and never settle for "good"—we strive for excellence and beyond. If you resonate with this description and are ready to accelerate with us, let's connect!We are currently seeking a Backend Engineer (PHP/Go) to help elevate our performance standards.

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.