Backend Engineer

What makes you a great fit:

• 5+ years building production backend systems in Python/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

Will be a plus:

• RTB/OpenRTB, VAST/VMAP, header bidding, DSP/SSP integrations
• Redis/DragonflyDB tuning, Kafka/Kinesis, ClickHouse/Redshift, Airflow
• Docker/K8s, GitHub Actions, ArgoCD; zero-downtime deploys & canary/blue-green
• Security/compliance in ad systems (PII, consent/TCF)
• Elasticsearch/Kibana experience

Why work with us?

• 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

Your day-to-day in this position:

• 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)

What is your new project?

• Domain: AdTech
• Location: Israel
• Company size: up to 10 employees
• Founded in: 2021

What makes this project exciting?
The domain involves cutting-edge digital advertising solutions such as real-time bidding, programmatic integrations, audience targeting, and performance optimization.

Our next steps:

✅ Intro call with a Recruiter — ✅ Intro tech interview — ✅ Technical assessment — ✅ Final client interview — ✅ Reference check — ✅ Offer

Who We Are:
Website: more about us and vacancies
Instagram: follow MWDN’s life
Facebook: follow our FB
Feel free to contact us without any hesitation!

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