Senior Software Engineer (Backend)

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