Senior Staff Engineer

2 days ago

Stockholm, Stockholm, Sweden Wolt Development Sverige AB Full time 120,000 - 240,000 per year

As part of Wolt's Platform department (Core Group), you will contribute to the reliability and scalability of our datastores, and work on the future unified storage platform we are building together with DoorDash.

We are looking for an experienced Staff Engineer specializing in storage reliability and building systems at scale to join the Platform department. In this role, you will lead the design and implementation of scalable platform solutions to support our e-commerce business, serving over 42 million monthly active users and 500,000+ merchants. As a Staff Engineer, you will define technical direction, mentor other engineers, and ensure our platform architecture can sustain rapid growth while staying reliable.

What you'll be doing

Technical Leadership: Provide technical direction and leadership to multiple storage teams, set best practices for data storage. Oversee development and migration to the unified platform with DoorDash, ensuring high availability and data consistency.

Growth Support: Lead the design and development of a robust, scalable storage architecture that supports our business goals and organic growth.

Mentor: Mentor and guide engineers at various levels, fostering a culture of continuous learning and improvement. Act as an evangelist for database optimization and best practices within the organization.

Collaborate: Work closely with Wolt and DoorDash teams responsible for foundational systems and services, such as compute and infrastructure, as well as product development teams, to ensure platform initiatives align with business goals and needs.

Documentation: Maintain comprehensive documentation of platform architecture, design decisions, and best practices to facilitate knowledge sharing and onboarding. Participate in writing and reviewing RFCs.

Security: Support implementation of the security best practices to protect data and maintain the integrity of our platform in alignment with our Security Engineers.

Observability: Improve dashboards and alerts, and drive their adoption. Working together with the Observability team, ensure engineers have the tools and visibility needed to quickly detect, investigate, and resolve issues.

Hands-on: Work directly on implementation when needed, including POCs and debugging complex technical problems.

Our humble expectations

Must haves:

2+ years of proven experience as a Technical Lead (e.g. Staff or Principal Engineer) in large-scale companies.

8+ years of hands-on experience in software engineering and designing systems at scale.

Deep understanding of non-relational databases (Cassandra preferred): best practices, performance optimization, data modeling, migration strategies, partitioning and sharding concepts.

Strong understanding of SRE and security best practices.

Proficiency in Go programming language.

Experience working with one of streaming platforms (Kafka and Kafka Connect preferred).

Strong communication and collaboration skills.

Proactive, data-driven mindset with the ability to drive changes across the entire organisation.

Experience in supporting large-scale development teams across multiple locations.

Nice to haves:

Experience working with relational databases (PostgreSQL preferred) and AWS RDS.

Knowledge of IaC tools (Terraform preferred) and orchestration tools (Kubernetes preferred).

Experience using Python for tasks and processes automation.

Familiarity with SOX compliance.

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