Realtime Data Engineer

Toss SecuritiesSeoul

On-site Full-time

Clicking Apply Now takes you to AutoApply where you can tailor your resume and apply.

Experience Level

Mid to Senior

Qualifications

We are looking for candidates with a strong foundation in Data Engineering and the ability to learn new technologies quickly. Experience in managing large-scale data platforms and a solid understanding of distributed messaging systems is preferred. Excellent communication skills are essential for this collaborative role.

About the job

Join Our Team!

The Realtime Data Engineer will be part of the Realtime Data Team within our Data Division.
This team operates a distributed messaging streaming platform, ensuring the stable transmission of large-scale financial transactions.
We manage high-volume data pipelines that deliver data with zero latency while maintaining integrity.
Moreover, we integrate real-time data into OLAP environments, enabling immediate business decision-making and service enhancement.

Your Responsibilities:

Operate and optimize our Kafka cluster to ensure high availability of large-scale data from Toss Securities.
Utilize tools like CDC, Kafka Connect, Flink, and ksqlDB to construct real-time data pipelines.
Manage OLAP to efficiently store and query large volumes of incoming real-time data, optimizing query performance.
Enhance architecture for greater throughput and lower latency, proactively assessing and implementing next-gen technologies for reliable data services.

Ideal Candidate:

Experience managing large-scale data platforms, ensuring infrastructure stability and performance.
Proven experience designing and operating Kafka-based architectures or a deep understanding of distributed messaging systems.
Intermediate to advanced proficiency in Java (or Kotlin), capable of implementing complex business logic in real-time streaming frameworks (Flink, ksqlDB).
Experience building or operating real-time analytics environments using OLAP systems like ClickHouse, StarRocks, Druid, or Pinot.
A broad experience in Data Engineering or depth in a specific area, eager to expand your role.
Strong foundation in Data Engineering skills, quick to learn new tech stacks, and adept at finding optimal solutions in diverse situations.
Excellent communication skills to collaboratively tackle complex problems with the team.

Joining Toss Securities:

Application Submission > Job Interview > Cultural Fit Interview > Reference Check > Compensation Negotiation > Final Offer and Onboarding

Please Note:

Any inaccuracies found in the resume or disciplinary issues during employment history may lead to cancellation of the application.
Candidates who are prohibited from hiring or have disqualifying reasons according to Toss Securities' regulations may have their applications canceled.
Individuals with disabilities or national veterans are given preferential treatment in accordance with relevant laws.

A Note for Future Colleagues:

Processing transaction data generated in the securities domain in real-time is of high importance from a business perspective and poses significant technical challenges.
The Toss Securities Realtime Data Team is at the forefront of this effort, currently maintaining stable securities services.
Toss Securities continues to grow. We hope that the entire process of maintaining the systems of a growing securities firm will be an enjoyable journey.

About Toss Securities

Toss Securities is a dynamic and innovative player in the financial services sector, committed to providing reliable and advanced solutions to meet the demands of a growing market. Our Realtime Data Team plays a crucial role in ensuring the stability and efficiency of our services.

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Full-time|On-site|Seoul

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Toss Careers

Full-time|On-site|Seoul

Role overview Toss Careers is seeking a Data Engineer in Seoul to strengthen its advertising initiatives. The position centers on creating data solutions that guide advertising choices and enhance campaign results. Close collaboration with colleagues from different teams is a key part of the role. What you will do Build and maintain data pipelines and systems tailored for advertising analytics Use modern tools to process and analyze large volumes of data Work with team members to turn business requirements into technical solutions Transform raw data into practical insights that shape advertising strategy Location This role is located in Seoul.

Apr 27, 2026

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Enterprise Sales Manager (Team Lead) - Join Our Growing Team

zoyi

Full-time|On-site|서울 강남구 논현로 508, GS강남타워

Join Our Dynamic Team At Channel Talk, we have demonstrated exceptional product competitiveness while rapidly growing in the SMB and Mid-market sectors. To create an even steeper growth trajectory, we are establishing a dedicated sales team to focus on Enterprise customers.This team is not about managing existing clients; it is about acquiring new clientele. We are looking for someone who can embark on this journey with us from the ground up. As the first team member and leader, you will initially focus more on hands-on contributions rather than managerial tasks. However, as the team expands, your role will evolve to encompass more management responsibilities.Your primary role will involve leading significant deals and creating success stories, which are crucial for establishing our presence in the enterprise market. As the team grows, you will take on key management functions, including recruitment, development, and performance management, so we seek someone who can adeptly navigate these challenges.

Feb 3, 2026

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