Senior Software Engineer (Backend)

About the role

About BreachLock BreachLock is a fast-growing cybersecurity company focused on modern, scalable, and continuous security testing solutions. We operate at the intersection of offensive security, automation, and cloud-native engineering-building systems that are both resilient and intelligent. Role Overview We are looking for a Senior Backend Engineer with strong fundamentals and a builder mindset to help design and scale backend systems powering our cybersecurity platform. This role involves working on distributed systems, APIs, and data-intensive applications in a fast-paced startup environment. Key Responsibilities ● Design, develop, and maintain scalable backend services and APIs ● Build and optimize microservices-based architectures ● Work with graph and relational databases to model complex security data ● Own end-to-end delivery of features-from design to deployment ● Collaborate with product, frontend, and security teams ● Improve system performance, reliability, and observability ● Participate in system design discussions and technical decision-making Tech Stack ● Languages & Frameworks: Python, FastAPI, Django ● Databases: PostgreSQL, MongoDB, Dgraph ● Infrastructure: GCP, Kubernetes ● Streaming & Messaging: Kafka ● Architecture: Microservices Required Skills ● 3-4 years of backend development experience ● Strong proficiency in Python and modern backend frameworks ● Solid understanding of system design principles and distributed systems ● Experience with microservices architecture ● Hands-on experience with PostgreSQL and/or MongoDB ● Familiarity with event-driven systems (Kafka or similar) ● Experience deploying and managing applications on GCP ● Understanding of containerization and orchestration (Docker, Kubernetes) ● Strong debugging, problem-solving, and performance optimization skills Good to Have ● Experience with graph databases (Dgraph or similar) ● Exposure to cybersecurity domain or security tooling ● Knowledge of observability tools (logging, tracing, monitoring) ● Experience working in high-growth startups What We're Looking For ● Ownership mindset-you build, ship, and improve ● Ability to work in ambiguous, fast-moving environments ● Strong communication and collaboration skills ● Bias for action and continuous learning Why Join Us ● Work on real-world cybersecurity challenges at scale ● Opportunity to influence architecture and core systems ● High ownership and impact from day one ● Fast-paced startup environment with strong growth potential

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