Security Operations Engineer

Atto Trading is a pioneering quantitative trading firm specializing in a diverse portfolio of signal-driven high-frequency strategies across cash equities and futures markets.We are on the lookout for a passionate Trading Operations Engineer to join our vibrant team. With our expansion into new markets, this is a thrilling time to become part of our international collective of experts specializing in trading, statistics, engineering, and technology. Our disciplined methodology, paired with rapid market feedback, enables us to swiftly transform innovative ideas into tangible profits. We foster an environment of collaborative learning, empowering us to tackle the most challenging problems together.As a compact firm, we maintain agility and uphold the highest standards of integrity, creativity, and dedication.Our Trading Activities:We actively trade stocks and futures across major US exchanges, including NASDAQ, NYSE, ARCA, Cboe, CME, CFE, and more.Position Highlights:Seize a unique opportunity to integrate software engineering with real-world finance right from day one.In this position, you will apply your engineering expertise directly to live trading and financial markets.Benefits of Joining Us:Continuous investment in the latest technology stack.A creative approach to selecting the hardware and software tools essential for your work.Join a dedicated team committed to ongoing learning and improvement.No external clients; you will be the sole user of the products you develop.Make a significant impact on the company’s bottom line while holding a crucial position within the organization.Key Responsibilities:Oversee and manage Atto Trading’s automated trading systems, ensuring seamless operations.Automate and refine trading support workflows and pipelines utilizing Python and Bash scripting.Collaborate with software engineering teams to enhance and maintain trading infrastructure and internal monitoring systems. Work alongside traders, engineers, brokers, and exchanges to resolve intraday issues in real time. Support daily risk operations by generating reports and executing established risk procedures.Document production incidents and maintain detailed logs and monitoring protocols.Assist in new market deployments by coordinating with internal teams on infrastructure and connectivity.Manage and maintain enterprise systems concerning pipeline scheduling, software releases, and operational monitoring.Qualifications:Proficient in Python programming with the ability to produce clean, reliable code with minimal oversight.Solid foundational knowledge of Linux (command line, basic system understanding).Expertise in data visualization, manipulation, and processing for operational insights.Meticulous attention to detail with a rigorous, analytical mindset.Ability to thrive in a dynamic and fast-paced environment.

Join Atto Trading, a leading quantitative trading firm established in 2010, renowned for our innovative high-frequency trading strategies. As we continue to grow our international team, we are eager to welcome a skilled Data Engineer who will be instrumental in the development of our extensive Data Lake, catering to an increasing array of research and production datasets. Our collaborative culture fosters learning and innovation, empowering our team to tackle complex challenges and drive profitability through rapid market responsiveness.Key Responsibilities:Design and manage high-performance, scalable on-premise data storage systems optimized for extensive data access and analytics tasks.Configure and oversee compute clusters for distributed data processing.Develop capacity and scalability plans to support annual data growth exceeding 100TB.Create efficient monitoring and alerting systems to anticipate growth trends and manage critical situations proactively.Build, automate, and maintain various data pipelines to ensure smooth data flow.Enhance existing and establish new data checks to ensure data integrity.Implement a comprehensive on-premise Data Lake connected to VAST storage for normalized market data across multiple sources including:US Equities, US Futures, and SIP feedsAdditional market data sources as they become availableSecurity Definition data for various marketsPrivate column dataDevelop and manage end-to-end data pipelines with monitoring to ensure data quality and governance.Analyze existing data models and usage patterns to identify bottlenecks and optimization possibilities.Create metadata and catalog layers for efficient data discovery.Design event-driven architectures for near real-time market data processing.Oversee ETL/ELT data pipelines using tools like Prefect or Airflow, ensuring robustness and clear operational ownership.Guarantee fault tolerance, scalability, and availability across our systems.Collaborate with traders, quantitative researchers, and other stakeholders to enhance the usability and performance of the Data Lake.

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).

Embark on Your Career as a Junior Data Scientist / Quant Researcher Intern in 2026!Are you driven by a passion for data analysis? Do you excel in competitive environments and relish the challenge of solving intricate problems? If so, we invite you to apply for our paid 4-week internship scheduled for the summer of 2026.About Atto Trading — The Fusion of Engineering and FinanceAtto Trading is a cutting-edge quantitative trading firm dedicated to developing innovative, data-driven strategies utilizing high-performance systems to navigate global financial markets.Our compact and dedicated team of engineers, traders, and researchers collaborates to:Transform concepts into profitable trading strategies.Engage actively in U.S. financial markets.Continuously learn and confront challenging technical problems together.Create ultra-fast, robust software solutions.As an intern, you will be fully integrated into our engineering team from day one, engaging in meaningful projects rather than merely assisting with side tasks.Your Responsibilities During the Internship Will Include:Analyzing extensive market data sets utilizing tools such as Polars, SQLAlchemy, and scikit-learn.Developing interactive reports and visualizations using Bokeh or Shiny-Plotly to provide actionable insights.Employing proprietary analytical tools to establish pipelines for subindicator generation.Collaborating with engineers, traders, and analysts in a dynamic business environment.Internship Details:Duration: 4 weeks during summer (August)Location: In-office internship in Lviv, Ukraine.Format: Paid internship.Exceptional interns may receive an offer for a full-time or part-time position based on academic commitments.Selected interns will receive an iPad as part of their welcome package from Atto Trading.This internship presents a unique opportunity to acquire hands-on experience in high-frequency trading (HFT), where analytics, precision, and speed are critical to success.Important Note: This internship is specifically for candidates residing in Ukraine. Please include a brief overview of your key achievements (academic, project-based, volunteer, or personal) in your CV.

Our Mission and VisionAt Solidgate, our mission is straightforward: to empower exceptional entrepreneurs in building remarkable internet companies. We aim to support the builders — those who are defining the digital economy — by providing the financial infrastructure they need. Our vision is bold: to emerge as the leading payments orchestration platform globally.We believe that the future of payments is crafted by individuals who think innovatively, take initiative, and approach their work with curiosity and determination. That’s exactly the type of team members we wish to bring on board.About the RoleAs a Junior Operations Analyst, you will immerse yourself in Solidgate’s internal processes and contribute to their optimization, ensuring our clients receive the most effective payment solutions available. This role offers you practical experience at the confluence of operations, analytics, and product development — collaborating closely with our technical and business teams to facilitate seamless payment solutions for businesses worldwide.Your ResponsibilitiesLead the technical onboarding of new clients into the Solidgate platform.Support processes associated with Solidgate’s payment services.Develop new workflows and enhance existing ones.Address analytical requests from clients.Establish payment routing.Work closely with product and technical teams within the organization.Engage with technical support teams from partner banks.Identify and rectify issues in the payment process.QualificationsBachelor’s degree in Applied Mathematics, Systems Analysis, Software Engineering, or a related field (completed or in progress).Strong written and verbal communication skills.Proficiency in English at an Upper-Intermediate level or above.Familiarity with SQL and Python.Experience with Postman and knowledge of Tableau will give you an edge.Why Choose Solidgate?No internships here — we develop careers. Get involved from day one and make a significant impact.Enjoy the experience. Work in a fantastic office in the heart of Kyiv, enjoy daily lunches, snacks, team-building activities, and benefit from a learning budget to support your growth.

Join our dynamic team at FlixMobility as a Junior Regional Operations Manager in Kyiv! In this pivotal role, you will support the execution of operational strategies across our regional network, ensuring the highest standards of service delivery. Your responsibilities will include coordinating with various departments, analyzing operational metrics, and identifying areas for improvement.We are looking for a proactive individual with a passion for operations and a desire to make an impact within a fast-paced environment.

Company: GATEXLocation: Kyiv (office)Reporting to: Co-ownerAbout GATEXGATEX is a dynamic and ambitious player in the international agro-trading sector, primarily focused on the export of Ukrainian agricultural products, including chicken, turkey, eggs, grains, and oil to various markets in Europe and Africa.Founded by top executives from the agriculture sector with the backing of an investment fund, GATEX has secured contracts for 400–500 tons of products, established its trademark, and is expanding its international presence in regions such as the UAE, the UK, and Ukraine.The company is currently in an active scaling phase, working on building systematic processes.Role ObjectiveThe Operations Director will be responsible for establishing an efficient operational system within the company, ensuring the fulfillment of international contracts, managing logistics, finances, and risks, while scaling the business without compromising quality or profitability.Key Responsibilities:1. Operational ManagementOrganizing the complete trading cycle (from procurement to shipment).Monitoring contract compliance.Managing logistics (multimodal transportation: warehouse – railway – port – vessel).Coordinating with suppliers, carriers, brokers, and warehouse operators.Quality control of products and liaising with inspection companies (such as SGS, Cotecna).Overseeing documentation, certification, and customs procedures.2. Business Process Development and OptimizationIdentifying and resolving bottlenecks in the supply chain.Developing and implementing standard operating procedures (SOP).Preparing processes for scaling.Implementing ERP and automation systems.3. Financial and Resource ManagementDeveloping and overseeing the operational budget.Monitoring P&L, cash flow, and profitability.Managing trade finance instruments (letters of credit, guarantees).Addressing currency risk.Optimizing financial processes for efficiency.

Ajax Systems is a leading technology company that takes pride in its comprehensive approach, from conceptualizing innovative ideas to research and development, and ultimately, mass production and sales. We specialize in manufacturing state-of-the-art physical devices, which encompass a variety of sensors and hubs. Our dedicated team is responsible for crafting the firmware, developing the server infrastructure, and launching mobile applications. With offices in both Kyiv and Lviv, we ensure that all technical and product-related decisions are made locally, fostering a collaborative environment.We have successfully launched and continually enhance Malevich OS, the core of our hubs. We are on the lookout for passionate Embedded Engineers eager to join us in elevating our systems. The quest for innovation never ceases, as we strive to introduce new functionalities, sensors, and features to further enhance our offerings.

Our Mission and VisionAt Solidgate, we are dedicated to empowering exceptional entrepreneurs in their quest to build outstanding internet companies. Our goal is to provide the robust financial infrastructure that innovators in the digital economy require. We are on an ambitious journey to establish ourselves as the foremost payments orchestration platform worldwide.We believe that the future of payments will be determined by individuals who think expansively, take initiative, and approach every task with curiosity and determination. These are the kind of individuals we seek to join our team.About the Team and RoleAs a Junior Operational Analytics Specialist, you will engage with Chargebackhit, our advanced technology designed to safeguard online businesses against fraud and chargebacks. This product operates with the agility and dynamism of a startup, where rapid evolution and swift decision-making are the norms.In this pivotal role, you will be central to product operations—linking services, overseeing performance, and analyzing data that provides real-time protection to merchants. This is an excellent opportunity to launch your analytics career in the fintech sector.Your ResponsibilitiesConnect, test, and monitor chargeback prevention services.Manage database interactions.Collaborate actively with Analytics, Sales, and Account Management teams.Address analytical requests from clients.Ideal Candidate ProfileBachelor’s or Master’s degree (completed or in progress) in analytics, programming, mathematics, or related fields.Proficiency in SQL and Excel.Strong analytical and problem-solving abilities.Excellent communication skills with a structured approach.Upper-Intermediate (B2) or higher level of English proficiency.Why Choose Solidgate?No internships here — we foster careers. You will get hands-on experience from day one and make a meaningful impact.Your contributions will lead to real outcomes. Help shape the money movement for global enterprises.Accelerate your growth. Learn from industry-leading fintech professionals and advance your skills rapidly.Enjoy flexible working hours. Balance your studies and work with hours that fit your lifestyle.

Join Playtech as a Junior QA Engineer, where you will play a vital role in ensuring the quality and performance of our cutting-edge gaming products. In this entry-level position, you'll work closely with our development team to identify issues, create test plans, and execute software testing procedures. This is an excellent opportunity for recent graduates or individuals looking to start their careers in software quality assurance.

Join our dynamic team at ajax as a Junior Image Quality Engineer in Kyiv. In this role, you will play a pivotal part in enhancing image quality standards across our products. You will collaborate with cross-functional teams to ensure high-quality visual outputs that exceed customer expectations.

Role overview Playtech seeks a Junior Quality Assurance Engineer based in Kyiv. This entry-level position centers on testing gaming software and supporting quality assurance activities. The role helps the team deliver reliable releases and uphold product standards. What you will do Collaborate with experienced QA team members to test gaming products Assist in confirming that software meets Playtech’s quality benchmarks Develop practical skills using different testing methods and tools Take part in team discussions and contribute to ongoing improvements Learning opportunities Build hands-on experience in software quality assurance Work closely with professionals in the gaming industry Gain exposure to Playtech’s technologies and internal processes

About the Role Playtech is looking for a Junior Quality Assurance Engineer in Kyiv. This entry-level position focuses on testing software to help deliver reliable products. The role involves working closely with developers and other team members to identify issues and improve product quality. What You Will Do Test software features and updates to catch bugs and performance issues Document test results and report problems clearly Collaborate with development teams to resolve issues and verify fixes Contribute to maintaining high standards for software quality Who This Role Suits This position is well suited for those starting a career in software testing or quality assurance and interested in learning from experienced teams.

Kyivstar seeks a Trade Marketing Specialist based in Kyiv, Ukraine. The position focuses on supporting retail locations by developing and overseeing point-of-sale (POS) materials, ensuring stores are equipped for promotions, and managing procurement activities. Key Responsibilities Oversee the quality, production, and distribution of POS materials for retail outlets. Ensure stores receive the marketing tools needed for campaigns and promotions. Initiate and coordinate procurement processes for marketing resources. Select suppliers and approve design templates for marketing materials. Track production timelines and delivery schedules to maintain project momentum. Manage the trade marketing budget, seeking opportunities to optimize spending. What Helps in This Role Experience in marketing, procurement, or project management. Ability to meet deadlines and maintain control over processes. Strong organizational skills and a structured approach to daily tasks. Accountability and determination to complete assignments. Collaborative mindset with effective communication skills across teams. Preferred Qualifications Background in telecommunications. Experience working with suppliers. Benefits Flexible, hybrid work schedule. Annual bonus based on goal achievement. Access to over 340 internal training courses, a comprehensive library, and partner education programs. Life and health insurance coverage. Employee support programs for staff and their families, including psychological and legal assistance.

Playtech seeks a Junior Quality Assurance Engineer in Kyiv to help uphold software quality across its gaming products. This position plays a key part in supporting the Quality Assurance team’s efforts to maintain high standards. Key responsibilities Collaborate with developers and project managers to identify and resolve software issues Assist in testing new features and updates ahead of release Support the ongoing reliability and quality of Playtech’s gaming solutions Role overview This role focuses on hands-on testing and teamwork. Junior Quality Assurance Engineers contribute to the smooth delivery of new features and help ensure Playtech’s games meet quality expectations.

Join SKELAR, a pioneering venture builder that crafts international tech businesses. Collaborating with co-founders, we assemble high-performing teams to excel in global markets.Currently, SKELAR boasts a diverse portfolio of businesses across various niches, from EdTech to marketplaces. Our companies consistently rank among the top startups and product firms in Ukraine, achieving high standings in the App Store and developing platforms used by millions. Our innovations have been featured in renowned media outlets such as TechCrunch and Wired.People are our core value. We unite passionate talents who inspire those around them with their drive and determination. We believe that the right environment is crucial, which is why we aim to create the best workplace in Ukraine.We are seeking a Junior Full-Stack Engineer to join us in building modern, intelligent, and adaptable products that will serve as the backbone of our internal processes and help accelerate our growth. This role offers a developer the chance to make a significant impact on product development and witness tangible results from their contributions.We operate like a startup within a company: rapidly testing ideas, engaging extensively with users, and continuously searching for improvement opportunities.Our team is currently expanding as we launch new services, restructure our architecture for scalability, and incorporate AI functionalities that unlock numerous new possibilities.

We are looking to strengthen our team at Guru Apps with a talented Junior iOS Engineer who will actively participate in product experiments alongside our dedicated team.Guru Apps is a multi-product company within the Universe Group, focused on developing global iOS applications in the utility and AI niches.Our products optimize the digital routines of millions of users worldwide daily — from memory cleaning, document management on your phone, to AI tools for photo editing and content creation.Over the years, we have achieved remarkable milestones:— Surpassed 100 million downloads— Expanded into 185 countries— Consistently ranked #1 in the App Store, surpassing giants like Google, Netflix, and Instagram— Established leadership in our niches, setting quality standards in the utility and AI categories— Launched our own R&D laboratory, where we create at least 2 new products each year and develop proprietary AI technologies— ⭐ Maintained an average rating of over 4.6 in the App StoreAt Guru Apps, we embrace speed, experimentation, and ambition to build global products with a distinctly Ukrainian DNA. If you want to experience what it’s like to work within a community united by the ambition to create a unicorn from Ukraine, check out this video about Guru Apps.You are the perfect fit if you:Want to impact the product. Our developers influence both technical and product decisions. We discuss these as a team, where everyone can voice their opinion and propose ideas.Aspire for growth — we have an experienced team eager to share knowledge. Interested in vertical growth? Here, it all depends on your desire and work results.Are ready to develop category-leading products — we have already achieved impressive results, and there’s much more to come!

Ajax Systems — a leading international technology firm and the largest manufacturer of security systems in Europe. Our products are trusted by over 4.5 million end users and 330 thousand PRO users across more than 180 countries. Ajax provides comprehensive solutions to safeguard residential and commercial properties of various sizes. Currently, our portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, comfort, and automation. Each year, we demonstrate exponential growth in both team size and user base worldwide.The security systems we develop demand heightened standards of reliability and stability. This is why our QA Department at Ajax Systems supports product development through all stages, from inception to manufacturing and ongoing enhancement. Our team identifies bugs in hardware, software, or system interactions. We are not just a group of 'clickers'; we are creative engineers who test new devices under various extreme conditions: simulating human and animal movements, recreating complex weather scenarios, managing temperature fluctuations, and conducting controlled fires and flooding.

KPMG* is a global network of independent firms providing audit, tax, and advisory services. For a deeper insight into KPMG in Ukraine, visit this link.Ranked among Ukraine's top 50 employers by Forbes (2023-2024) and among the top 5 employers for youth in audit and consulting, as per a student survey conducted by the branding agency UGEN in 2023-2024, KPMG Ukraine is committed to creating an inclusive workplace. In March 2025, we joined a group of leading companies that signed the Principles of Business Supporting Veterans. We are also recognized as a high-compliance taxpayer, a member of the 'White Club'.We are currently seeking a Junior Auditor who is eager to grow in this field and become a part of our professional team!Why should you join us? Here’s what we offer:Work in teams that create meaningful impacts;Access to internal and external training that enhances professional skills;Participation in national reconstruction projects;Psychological support services (increased consultations for mobilized individuals, veterans, and their families);Comprehensive medical insurance (extended options for veterans);29 calendar days of vacation;5 additional paid health days;Wellness webinars, yoga sessions, book clubs, women’s community, and blood donor community;Flexibility to work remotely or from a comfortable office in the city center;Opportunities for charity and volunteering in support of vulnerable groups, animal care, and a green office;Official salary with tax deductions;Exciting challenges and transparent growth conditions;Contributions and donations towards victory.What awaits you?Execution of initial audit procedures;Preparation of working documents for audit projects;Collaboration with experienced colleagues;Interaction with the tax and consulting sectors of the company.This role is for you if you:Are a student in your 3rd to 6th year or a recent graduate in economic specialties;Possess analytical skills;Have an Intermediate level of English or higher;Enjoy teamwork and have a desire to learn and develop in auditing;Willingness to work in a hybrid format and travel for business trips is expected.* KPMG Ukraine fosters a work environment where everyone has opportunities for development and career building: the company adheres to a zero-tolerance policy towards any form of discrimination based on age, gender, sexual orientation, or disability. We respect diverse opinions and experiences as we believe this enriches our work culture.