Senior Backend Engineer job opportunity at MLabs.

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Date2026-02-26T11:53:11.220Z bot
MLabs Senior Backend Engineer
Experience: 5-years
Pattern: full-time
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Poland

Senior Backend Engineer Location: US or Europe (Must have solid overlap with EST) Remote | Full-time Compensation: $150K - $200K Our client is an industry-leading DeFi organization building the next generation of trading infrastructure. Operating as the largest builder-code product on a major decentralized exchange protocol, the company has processed over $65B in cumulative trading volume and generated eight-figure revenue over the past year. With a user base exceeding 400,000 registered traders, the platform is at the forefront of democratizing access to global financial markets across crypto, equities, and commodities. The organization operates as a lean, highly technical team of individual contributors who prioritize autonomy, ownership, and rapid execution. This environment is designed for a Senior Backend Engineer who thrives in 0-to-1 environments and is capable of building ambitious systems from the ground up. This role is central to scaling trading interfaces that manage billions of dollars in daily volume while maintaining high-speed, intuitive user experiences. Key Responsibilities System Architecture: Own and drive architectural decisions for the client’s backend systems to ensure scalability and reliability. Data Pipelines: Build and operate high-performance, real-time data pipelines for order book updates, trade executions, and market events. API Management: Design and maintain the API layer (utilizing GraphQL and WebSockets) to serve high-traffic web and mobile clients. Database Optimization: Work extensively with ClickHouse, PostgreSQL, and Redis to manage and query high-volume trading data efficiently. Performance Monitoring: Instrument services with comprehensive metrics and alerting systems; participate in on-call rotations to ensure 24/7 system availability. Technical Troubleshooting: Debug complex latency issues, memory management problems, and system reliability concerns under heavy load. Cross-Functional Collaboration: Partner with frontend and mobile engineers to ensure analytical data is served effectively via API. Interview Process Initial Interview: Discussion with the Founder / CEO. Technical Assessment: First-round technical interview. Deep Dive: Second-round technical interview. Final Review: Final interview with the leadership team. Experience: 5+ years of production backend engineering experience, preferably with a strong command of TypeScript. Real-Time Systems: Proven expertise in WebSockets, event streaming, and pub/sub architectures. Data Proficiency: Deep familiarity with PostgreSQL and Redis; experience with ClickHouse or similar columnar databases is highly preferred. Scale: A track record of operating high-availability services at significant scale. Domain Knowledge: A solid understanding of core trading concepts, including orders, fills, order books, positions, and execution logic. Technical Rigor: Strong debugging skills with experience in performance profiling, slow query optimization, and resolving memory leaks. Nice-to-Have Qualifications Experience with Kafka or comparable streaming systems. Professional background in fintech, trading platforms, or low-latency applications. Familiarity with DeFi protocols or on-chain data structures.

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