Senior Go Developer

MWDN is a global IT outstaffing company with over 23 years of experience connecting exceptional tech talent with leading companies across Israel, the USA, Great Britain, and Western Europe. They offer opportunities to work on international products in a stable and professional environment.

• Design, build, and operate high-throughput, low-latency backend services for ad delivery and analytics
• Own queue-driven workloads (Celery/Redis/DragonflyDB): throughput, retries, back-pressure, idempotency
• Optimize performance end-to-end: CPU/memory, networking, asyncio/concurrency, caching, schema/indexing
• Productionize on AWS (EC2/EKS/Lambda, S3, RDS, ALB/NLB, IAM, elasticsearch)
• Implement robust observability: metrics, tracing, structured logs, SLOs/alerts
• Collaborate with product/analytics to ship features fast; run load tests and capacity plans for peak QPS
• Harden systems for resiliency, cost, and security (least-privilege IAM, secrets, threat modeling)

• 5+ years building production backend systems in Python or Go
• Strong AWS experience running scalable, reliable services
• Proven track record optimizing servers for high load/low latency
• Deep hands-on with Celery (or similar queues), task orchestration, and distributed systems fundamentals
• Comfortable with Bash, Linux networking, and performance debugging (perf, eBPF, flame graphs)
• Solid JavaScript/Web fundamentals (HTTP, TLS, CORS, cookies, caching, CDNs)
• SQL/NoSQL experience; data modeling for large-scale reads/writes
• Great communication, team player, fast learner, proactive, and willing to work hard to hit goals
• At least an upper-intermediate level of English

• People-first management with minimal bureaucracy
• A friendly company culture, proven by employees who choose to return
• Flexible working hours
• 29 days of PTO (18 working days per year, plus all national holidays)
• 9 paid recovery days
• Full financial and legal support for independent contractors
• Free English classes, with native speakers or Ukrainian teachers
• Dedicated HR support