Junior Data Engineer at Tossbank | Seoul

About the Team The Data Engineer (CPC) position will be part of the CPC Platform team within the Data Division of Tossbank. The CPC Platform team is dedicated to building a reliable data framework to meet various regulatory requirements (CPC, disclosures, regular reports, etc.) from financial authorities, enhancing both Tossbank's external credibility and in…

Join our dynamic team as a Data Analyst specializing in e-commerce, where you'll play a crucial role in transforming data into actionable insights. Your expertise will help drive data-informed decisions that enhance our business strategies and improve customer experiences.

Join Our Dynamic Team As a Data Analyst at Toss Securities, you will be part of our data analytics team. Our Data Analytics (DA) team comprises two main segments: the enterprise analytics unit and the product analytics unit, where you will be contributing to product analysis. Our team is diverse, with members hailing from finance, gaming, e-commerce, O2O, and portal backgrounds, bringing a wealth of experience. Your Responsibilities Support data-driven decision-making for our product development teams. Quantify team goals and identify key levers to achieve them, providing direction for prioritization. Contribute to product enhancements through A/B test design and result analysis, leveraging various analytical methodologies for insights. Ideal Candidate Profile Proficient in SQL for data extraction and cleansing. High-level understanding of mobile service data analysis methods (Customer Lifetime Value, Retention, Cohort Analysis, etc.). Experience in setting hypotheses and conducting experiments to improve services. Demonstrated ability to design A/B tests and derive meaningful results. Familiarity with data visualization tools (such as Tableau) is a plus. No strict experience level is required; we value insights gained from diverse experiences. Resume Recommendations Detail impactful projects from your experience. Clearly outline the problem definition, hypothesis setting, experimental design, and result validation processes. Share experiences where you deepened user understanding through data analysis and proposed actionable strategies. Confirm proficiency in mobile service data analysis methods (LTV, AARRR, Cohort, Funnel, etc.). If objectives were met, quantify improvements in metrics like churn rate, conversion rate, and revenue. (Please omit sensitive information if necessary.)

# Join Us in the Domain- Commerce: Our commerce domain, initiated to enhance simple payment solutions, has grown to provide both group buying and administrative services for sellers. You will own the data for the commerce domain and play a crucial role in expanding our services, significantly contributing to Toss's growth.- Ads: You will take ownership of the advertising domain data to deliver meaningful ads to Toss users. Toss Ads is the most effective performance advertising platform in Korea, and you will help build a solid foundation for its efficient utilization.- Pay: As a key area of finance, the payment domain significantly steers Toss's growth. You will facilitate connections with various merchants and external organizations to develop Toss Pay, ensuring smooth analysis and insights from payment data.- Growth: Focused on enhancing user engagement and economic value, you will strategize and execute plans for the growth of new services and cross-activation of Toss users.- Business: Placed within the business organization that drives revenue growth for Toss, you will utilize comprehensive data across various domains to provide insights for business analytics and revenue growth strategies.- An interview process will determine the most synergistic domain for your placement, considering your strengths and the organization's needs.- **Want to learn more about Toss's Data Organization?** [→ *Toss Data Division Wiki*](https://recruit-data-division.oopy.io/)

About the Team You Will Join The Internal System Engineer position at Toss Securities is responsible for managing in-house infrastructure and IT support, collaborating closely with IT Managers and Internal Network/System Engineers. You will design both wired and wireless networks for the headquarters and remote locations, while integrating user-centric security technologies to create a seamless work environment. Your role will focus on enhancing internal infrastructure and operational efficiency, allowing Toss Securities colleagues to concentrate on their work. Your Responsibilities Upon Joining Establish and operate in-house VDI/HCI/virtualization infrastructure. Oversee the deployment and management of the Horizon VDI environment. Build and manage the necessary servers and HCI infrastructure. Streamline repetitive tasks through automation and scripting solutions. We Are Looking for Someone Who Has experience in building and managing servers based on Windows and Linux. Is capable of establishing and operating hypervisor environments such as VMware and Docker. Can manage VMware Horizon-based VDI environments. Possesses experience in setting up and operating various infrastructure services such as DNS, DHCP, AD, and SMB. Has basic knowledge of NAC, VPN, and DLP technologies. Has experience in establishing and managing monitoring tools like Prometheus, Grafana, and Zabbix. Is proficient in automation development using Python, PowerShell, and Ansible. Journey to Joining Toss Securities Application > Job Interview > Cultural Fit Interview > Reference Check > Salary Negotiation > Final Acceptance and Onboarding Please Note If any false information is found in the resume or if disciplinary actions are confirmed during employment, the recruitment may be canceled. Applicants who fall under the hiring restrictions or disqualifying reasons according to Toss Securities regulations may have their applications canceled. Individuals with disabilities or who are veterans will be given preferential treatment according to relevant laws. A Word for Future Colleagues> "You can experience everything as a System Engineer." - I joined Toss Securities after working as a System Engineer in a mobile service company with large traffic. In my previous role, I managed numerous platforms, but at Toss Securities, I realized I had a superficial understanding of infrastructure operations. Here, I closely collaborate with various departments and gain a comprehensive understanding of the overall architecture. I recommend Toss Securities for System Engineers who are eager to learn, passionate about their work, and seeking the best environment for a career quantum leap!

Join our dynamic team where innovation meets collaboration.About the TeamAs a System Engineer at Toss Securities, you will be part of the System Engineering Team alongside InfraOps Engineers.You will be responsible for building and supporting systems for external and internal clients, managing our IDC, and collaborating with exceptional team members from various sectors including finance, commerce, portals, and gaming.We focus on enabling product teams to concentrate solely on their products by building robust infrastructure capable of handling large-scale traffic and driving automation for faster product releases.Your ResponsibilitiesManage and support infrastructure for Toss Securities including servers, OS, SAN, storage, and backup systems.Allocate server equipment for new services and integrate them with existing services.Operate and manage our IDC and public cloud infrastructure.Who We're Looking ForExperience with system engineering and operations based on Linux OS for less than 5 years.Ability to collaborate with developers using scripting languages (Shell, Python, Perl, Ruby, etc.) for infrastructure management.Strong handling of Linux systems and good business understanding of services is preferred.Experience in building and operating system automation deployment solutions is a plus.Resume RecommendationsPlease detail two memorable cases of technical problem-solving (optimization, error fixing, etc.).Provide detailed descriptions of projects you've contributed to (project duration, your role, technology stack used, improvements made, etc.).List the versions of the OS and major solutions you have worked with.Application Journey at Toss SecuritiesApplication submission > Job interview > Cultural fit interview > Reference check > Negotiation > Final acceptance and onboardingAdditional InformationIf any false information is found in your resume or any disciplinary actions in your employment history are confirmed, your application may be canceled.

Key ResponsibilitiesManage and operate the testing infrastructure for our software and hardware solutions.Conduct operations and maintenance on bare-metal equipment utilized for evaluations.Support the evaluation infrastructure to ensure successful product validation.

Role SummaryAs a Principal Engineer in Systems Design Engineering, you will take full ownership of the end-to-end PCIe system design for our NVMe SSD product line. This encompasses client laptops and enterprise servers, guiding the process from PHY/MAC review through ASIC/SoC integration, PCIe SFR/register analysis, and establishing firmware design guidelines that ensure robust link training, link transitions, and low-power behavior. This pivotal role sits at the intersection of PCIe specification compliance, NVMe operational behavior, firmware architecture, platform interoperability, and power/performance optimization.Key Responsibilities· Lead the architecture of system-level PCIe Gen5/Gen6 from an NVMe SSD endpoint perspective.· Define and oversee PCIe + NVMe integration across various SSD products.· Conduct PHY + MAC IP reviews, establishing integration requirements and constraints.· Manage SoC/ASIC integration, including clocks, resets, power domains, straps, lane mapping, and sidebands.· Develop PCIe SFR + firmware guidelines covering flow control, LTSSM observability, power states, and error handling.· Oversee link and low power transitions, including DLRM, L1, L1SS, L0p, ASPM, clock-down, and APST coordination.· Facilitate bring-up and debugging processes: enumeration, speed negotiation, width detection, stability, and AER/error recovery.· Tune customer requirements focusing on latency/power, performance, reliability, and consistency.· Provide expert knowledge regarding PCIe configuration and extended capability registers.· Act as the technical authority for cross-team and customer escalations.Detailed Responsibilities (End-to-End PCIe for NVMe SSD)1. PHY/MAC IP Review (System Design Perspective)· Understand criteria for PHY/MAC/controller IP, including Gen5/Gen6 readiness and equalization capability.· Review IP documents for compliance features and link speed support.· Specify platform-facing requirements such as retimer/redriver compatibility.2. ASIC/SoC Integration Ownership· Integrate PCIe subsystems focusing on clock handling, reset behavior, and power domains.· Define lane policies for NVMe, including width detection and recovery strategies.

Join Our TeamToss Bank's Security Division consists of specialized teams including Security Policy, Privacy Protection, System Security, Network Security, Red Team, Blue Team, IT Service, and Security Audit.The Security Operations Specialist (System Security) plays a crucial role in safeguarding Toss Bank’s systems against external threats, operating within the System Security Team.This division collaborates with various teams to create a safe and reliable Toss Bank service. Specifically, the System Security Team works closely with product organizations, Legal & Compliance, Platform Engineering, and Internal Audit to ensure regulatory compliance and internal controls. The synergy across all teams fosters effective collaboration towards shared goals.The Security Division is committed to providing secure electronic financial transaction services, ensuring that security is integrated into users' workflows for a safe working environment.Key ResponsibilitiesDevelop, manage, and enhance access control security solutions.Manage security solutions such as Server Access Control (SAC), Database Access Control (DAC), and Apache Ranger.Troubleshoot and resolve various issues arising from security solutions.Enhance operational policies and elevate management standards through diverse tools and methods.Who We're Looking ForExperience in information security is beneficial but not mandatory. Candidates with experience managing access control security solutions or understanding the principles of various security solutions are preferred.Interest in automating security tasks using PowerShell, Python, or APIs to improve efficiency and management is desirable.Understanding of IT infrastructure, operating systems, and databases relevant to security solution operations is expected.A strong desire to analyze and resolve issues that arise during the operation of security solutions is sought.Experience in automating repetitive operational tasks and working with log parsing, cleansing, and detection rule creation is advantageous.Experience in implementing security policies to comply with electronic financial transaction laws and regulations is a plus.Resume Submission GuidelinesPlease provide detailed examples of your work experience, highlighting your role in projects, technologies used, and improvements made before and after.If you faced challenges while solving problems, explain your thought process and how you resolved them.If you have experience identifying and responding to security threats or solving diverse issues (technical and managerial), please detail these experiences.Document your experiences in learning new security technologies and threats specifically.Application ProcessApplication Submission > Job Interview > Cultural Fit Interview > Reference Check (if applicable) > Offer Negotiation > Final Acceptance and OnboardingImportant NotesThis is a contract position with an initial contract period of one year.New graduates are welcome to apply!Any discrepancies found in the resume or disciplinary actions during previous employment may result in cancellation of the hiring process.

Toss Care seeks a Tech Excellence Manager specializing in Infrastructure and Systems for its Seoul office. This position plays a central role in shaping and upholding technical standards throughout the organization. The focus is on enhancing system reliability, improving efficiency, and ensuring that infrastructure aligns with evolving technologies. Key Responsibilities Encourage strong technical practices within and across teams Collaborate with colleagues from various departments to strengthen infrastructure Lead initiatives to optimize system performance Contribute to company-wide efforts that maintain high technical standards Role Focus This role centers on continuous improvement of infrastructure and systems, balancing technical excellence with practical implementation. Working closely with different functions, the manager will help ensure that the company’s systems remain reliable and efficient as technologies evolve.

Company OverviewCoupang exists to deliver extraordinary customer experiences. When customers ask, "How did I live without Coupang?" we know we are fulfilling our mission. With unwavering dedication to making shopping, dining, and overall living easier for our customers, Coupang is at the forefront of innovation in the multi-billion dollar e-commerce industry. As one of the fastest-growing e-commerce companies, we have established a unique position in the domestic commerce sector and built strong customer trust.Coupang prides itself on being a globally listed company rooted in a startup culture. This allows us to maintain the agility we had at our founding, continuously launch new services, and expand our business. Every employee at Coupang is given the opportunity to embrace an entrepreneurial spirit and drive new innovations and initiatives. Our culture thrives on boldness and a commitment to achieving results. At Coupang, you will witness daily growth in yourself, your colleagues, your team, and the entire company.Every Coupang employee is genuinely committed to our mission of shaping the future of commerce. We solve customer problems, challenge traditional notions, and push beyond feasible limits. If you seek an exceptional working experience in a highly connected world powered by high-tech and always-on capabilities, we invite you to join us at Coupang.

# About the Team/Position- The Data Product Manager (Log) is part of the Real-Time Data team.- This team ensures that all Toss Bank products operate on reliable data by designing and managing the entire process of log data from 'definition - collection - validation - utilization'.- The App Log Manager plays a crucial role in maintaining the integrity of log data over time, creating standards and quality criteria that ensure data reliability.# Responsibilities- Define and manage the log structure and standards across apps and servers (json schema, key/value rules).- Build and manage the Log Specification with a traceable history of key/value creation, modification, and deletion.- Minimize structural differences between FE, BE, and Native logs while enforcing a unified logging policy.- Design and enhance automated validation systems to ensure log data quality, including: - Syntax validation: checking fields, types, and structures - Semantic validation: ensuring consistency and meaning in logs for the same actions.- Balance team resources and efficiency during standardization and automation, optimizing overall organizational log operations.- Collaborate with data engineers, data analysts, and developers to institutionalize log standardization and QA processes across the organization.- Analyze and address the impact of UI/UX changes, such as design modifications or multilingual (i18n) expansions, on log meaning.- Design a balance between standardization, validation, and automation while taking responsibility for overall data quality.# Ideal Candidate- A self-starter who can structure the entire lifecycle from log definition to validation, with experience in writing Log Specifications and schema design, as well as key/value management.- Strong problem awareness regarding log quality assurance and validation automation, with practical experience in designing and improving validation/QA systems.- Experience in integrating logs from various platforms (FE, BE, Native) into a cohesive system or able to approach complex environments structurally.- Familiarity with dynamic parameters and unstructured log formats.- Proven experience in creating a governance structure focused on systems rather than individuals while collaborating with diverse roles (DA, DE, FE, BE, QA, Design) to improve data quality.- Understanding the influence of design changes and multilingual extensions on log meaning, with the ability to design realistic connections with designers and developers.- Capable of not just identifying complex issues but also designing and implementing practical processes to enhance data quality.# Resume Recommendations- Experience in defining, designing, and managing app logs or service logs.- Experience in log standardization, key/value rules, and schema management.- Experience in designing validation and QA automation (Python, SQL, Airflow, CI/CD, etc.).- Experience in integrating and managing FE/Native/BE logs for quality assurance.- Experience in addressing data quality issues such as log error detection, backfill, and reprocessing.- Experience collaborating with various roles (FE, DA, DE, QA) to enhance data quality.# Journey to Joining Toss- Application submission > Job interview > Cultural fit interview > Reference check > Compensation negotiation > Final acceptance and onboarding.# Important Notes- Any false information found in resumes or documents may lead to job cancellation.- Applicants falling under the disqualification criteria per Toss Bank's employment rules may also face cancellation.- Disabled individuals and veterans will receive preferential treatment in accordance with relevant laws.# A Colleague's Insight"We manage the log structure and standards across applications and servers."- The Log DPM at Toss Bank plays a pivotal role in ensuring that logs maintain their meaning over time and are trusted as reliable data.- This role provides a great sense of utility as it is responsible for overall data quality!

About the Team You'll Join The Data Analyst at Toss Bank is integrated into both the squad and DA chapter, functioning within a matrix structure. At Toss Bank, teams are organized into squads, consisting of 6-8 professionals including Product Owners, Designers, Developers, and Analysts, working autonomously like a startup. Data Analysts in the Toss community belong to the DA chapter, which meets every Wednesday to share insights on data analysis topics. The DA chapter comprises team members with 1 to 12 years of experience from diverse backgrounds, including finance, corporate, gaming, and e-commerce. Key Responsibilities You'll Undertake As a Data Analyst at Toss Bank, you will define business problems through data and identify optimal solutions to effect real change. Drive Data-Driven Decision Making: Go beyond merely extracting requested data by defining the 'real problems' behind business needs and formulating hypotheses. Validate hypotheses using appropriate methodologies, such as causal inference and A/B testing, to derive actionable insights. Create Reliable and Efficient Analytical Environments: Focus on developing reusable data structures that team members can utilize repeatedly, moving beyond one-time analyses. Establish data standards through data mart design and consistency validation that everyone can trust. Work Smart with Technology: Utilize cutting-edge technologies (AI, LLM, etc.) to enhance efficiency in repetitive tasks, allowing for a focus on more significant problem-solving. Proactively adopt new analytical methods and tools that can elevate productivity without being constrained by past practices. We Seek a Candidate Who: Can discern the essence of problems and proactively propose solutions that consider the impact on our team, company strategy, and business objectives. Understands complex business logic and can translate this into coherent SQL queries for structured data. Is adept in deep data analysis using tools like Python/R, capable of accurately interpreting experimental results based on statistical knowledge. Can communicate complex analytical findings in simple terms that non-experts can understand and persuade. Preferred Experience: Experience in constructing dashboards and analytical environments using tools such as Tableau or Amplitude is a plus. Prior involvement in service planning and log design stages is advantageous. Experience in leveraging new technologies (like AI) to enhance work processes is preferred. Resume Tips: Detail impactful projects you have worked on. Showcase the process of problem definition, hypothesis formulation, experimental design, validation, and results. Mention any experiences that led to deep user understanding through data analysis and actionable insights. Check if you have extensively utilized mobile service data analysis methods (LTV, AARRR, Cohort, Funnel, etc.).

Join Speechify as a Software Engineer focused on Data Infrastructure & Acquisition, where you will play a pivotal role in designing and implementing robust data systems that enhance our product capabilities. This is an exciting opportunity to work with cutting-edge technologies in a dynamic environment.

Join our dynamic team as a Data Analyst focusing on Search Relevance at Toss! In this role, you'll be responsible for analyzing user behavior and search patterns to enhance our platform's search capabilities. You'll work closely with engineering and product teams to drive improvements and optimize user experiences. If you are passionate about data and want to make a tangible impact, we’d love to meet you!

Join Our TeamThe Server Developer (Product) is an integral part of Toss's Maker Organization, Silo. Within each Silo, a diverse team of 6-8 professionals, including product owners, designers, developers, and data analysts, collaborates with autonomy, akin to a small startup.As our user base expands, our dedicated team of server developers ensures stable operations, supporting various services across Toss, distinct from the rapid experiments conducted within the Silo.What You'll Be DoingDesigning and developing the Product server, utilized daily by countless Toss customers.Offering over 50 diverse services since the launch of our easy remittance service in 2015, including financial status inquiries, pedometers, and luck quizzes.Implementing cutting-edge technologies to ensure service stability while promptly addressing user feedback and issues.Who We're Looking ForIndividuals with experience in designing and operating high-availability, scalable systems.Professionals with a background in developing systems that manage large-scale real-time traffic.People who have faced and resolved system outages effectively.Passionate individuals who treat the service as their own, embodying a sense of ownership.Collaborators eager to share insights and ideas gained from service development, constantly seeking technical challenges.Services You Will HandleLoan: Create services that allow users to easily compare various loans and manage them efficiently. We aim to be the go-to choice for credit loans, mortgage loans, refinancing loans, and card loans.Marketplace: Develop essential services, such as credit card benefit comparisons, investments, and auto insurance, for financial users.Payment: Work on Toss's simple payment service, TossPay, handling everything from online and offline payments to new payment method development and user acquisition promotions.Commerce: Enhance Toss's payment capabilities through commerce initiatives, launching group-buying and seller admin services to create value for both users and sellers.Benefits: Lead the creation of innovative services in the benefits tab, including pedometers, live shopping, lucky lotteries, and point rewards for friends.Ads: Expand Toss's advertising business, developing stable-serving products that handle large traffic volumes while integrating ad network developments.Home: Create services related to the home screen, the first touchpoint for all Toss users, analyzing assets and expenditures while connecting users to other relevant Toss services.

Join our innovative team at Toss Payments as a Data Engineer, where you'll play a crucial role in building and optimizing our data infrastructure. You will work with cutting-edge technologies, collaborating with cross-functional teams to drive data-driven insights and solutions. Your expertise will help us enhance our payment systems and improve user experiences.

Join RWS as an AI Data Specialist in vibrant Seoul, South Korea. In this pivotal role, you will be responsible for managing and curating high-quality datasets to support our innovative AI projects. Your expertise will directly contribute to enhancing our AI capabilities and driving impactful solutions.

Join our dynamic team at daangn as a Data Analyst Intern focusing on Cross Product Growth. This is an exciting opportunity for individuals eager to dive into data analysis and contribute to innovative projects. You will work closely with experienced analysts to derive insights from data, helping to shape our product strategies and improve user experience.

As a Senior Data Scientist, you will be instrumental in aligning our innovative AI solutions with the distinct requirements of our manufacturing clients. Your primary focus will be on spearheading the creation of cutting-edge AI applications that address intricate industry challenges, fostering innovation and boosting productivity.We are looking for an experienced data scientist adept at deriving meaningful insights from manufacturing data. Your responsibilities will encompass mining, interpreting, and analyzing customer data to unearth hidden opportunities and maximize its potential. Furthermore, you will engage directly with customers to understand their challenges and unique data characteristics. Through this close collaboration, you will design customized data models and tools tailored to their specific needs. Additionally, you will work alongside our cross-functional teams to conceptualize, design, and develop groundbreaking AI products for manufacturing by identifying new product features rooted in your understanding of customer data.Join a team of passionate innovators dedicated to transforming the future of manufacturing. Take the initiative in pioneering advanced AI projects that significantly affect real-world outcomes. Collaborate with a diverse and talented group of experts where your ideas will be highly valued, and your contributions will propel Gauss Labs towards becoming the global leader in industrial AI innovation.