Python & Go Software Architect

• Very good knowledge of Go, including development of concurrent services, UDP/TCP servers, and high-throughput decode loops
• Profiling Go applications using pprof
• Very good knowledge of asynchronous Python, including asyncio, event loop, tasks, cancellation, and backpressure
• Development of asynchronous HTTP clients and servers and multiprocess worker pools
• Practical knowledge of networking at L2/L3/L4 levels
• Knowledge of VLANs, MAC/IP semantics, TCP flags, MTU, fragmentation, IPv4, and IPv6
• Knowledge of network flow telemetry protocols: IPFIX (RFC 7011), NetFlow v5/v9, and sFlow v5
• Experience with template-based decoding, sampling rates, sequence gaps, and loss handling
• Experience with packet capture, crafting, and pcap file analysis
• Network device automation through SSH/CLI and vendor APIs, including Cisco, Arista, Juniper, and Palo Alto
• Experience with idempotent configuration deployment and drift detection
• Protocol Buffers, including schema design and evolution and code generation
• Fast JSON and binary codecs for performance-critical paths
• Kafka knowledge including producer and consumer semantics, partitioning, acks, batching, compression, SASL/Kerberos, and lag diagnosis
• Knowledge of NSQ or NATS is an advantage
• Knowledge of columnar or time-series databases such as ClickHouse
• Performance profiling, memory allocation optimization, GC pressure, lock contention analysis, and zero-copy mechanisms
• Knowledge of data structures like LPM/Patricia tries, LRU caches, and fast hashing with ability to explain trade-offs
• Load generation and sustained-throughput testing
• Knowledge of Linux including sockets, epoll, sysctl tuning, cgroups, and resource limits
• EBPF is a strong advantage
• Experience with containers and Kubernetes, including multi-stage builds and manifest management
• Building self-contained packages including static/frozen builds, deb/rpm packages, upgrade and rollback mechanisms
• IPC patterns, e.g. ZeroMQ
• Cache and state synchronization design, eventual consistency, reconnecting, resynchronizing after disconnects, and idempotent event replay
• Static typing and quality control tools, including mypy, golangci-lint, formatters, linters, and pre-commit gates
• Asynchronous unit tests, snapshot tests for decoders, and load tests in CI
• Dependency and CVE management and reproducible pinned builds
• Very good command of English, both spoken and written

Nice to have:

• Windows/AD, including WinRM, SMB, and Kerberos
• Knowledge of SDKs for major cloud platforms, Azure or AWS, for asset and log ingestion

• Development of an application operating in a microservices architecture
• Design and development of high-performance services in Go and asynchronous Python
• Creating and developing functionalities related to access and permission management
• Development of components responsible for processing network traffic and telemetry
• Integration with network devices, messaging systems, databases, and customer environments
• Maintenance and further development of the existing codebase
• Profiling, testing, and performance optimization of the solution
• Ensuring code quality, automated testing, dependency security, and build reproducibility
• Participation in the preparation of installation packages, upgrades, and rollback mechanisms
• Cooperation in implementing new functionalities in the cybersecurity domain