Python & Go Software Architect

As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for:

Python & Go Software Architect

Responsibilities

• 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

Requirements

• Very good knowledge of Go, including the 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 the 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 and 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, including producer and consumer semantics, partitioning, acks, batching, compression, SASL/Kerberos, and lag diagnosis
• NSQ or NATS as an additional advantage
• Knowledge of columnar or time-series databases, such as ClickHouse
• Performance profiling, optimization of memory allocation and GC pressure, lock contention analysis, and the use of zero-copy mechanisms
• Knowledge of data structures such as LPM/Patricia tries, LRU caches, and fast hashing, together with the ability to explain the trade-offs associated with their use
• Load generation and sustained-throughput testing
• Knowledge of Linux, including sockets, epoll, sysctl tuning, cgroups, and resource limits
• EBPF as a strong advantage
• Containers and Kubernetes, including multi-stage builds, fast inner-loop development environments, and manifests
• Building self-contained packages deployed in customer infrastructure, including static/frozen builds, deb/rpm packages, and upgrade and rollback mechanisms
• IPC patterns, for example ZeroMQ
• Cache and state synchronization design, eventual consistency, reconnecting and resynchronizing after long 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 an SDK for one major cloud platform, Azure or AWS, for asset and log ingestion

Offer

• Private medical care
• Co-financing for the sports card
• Constant support of dedicated consultant
• Employee referral program