Nursultan Kuandyk

Senior Go Software Engineer

Played a key part in the development of an operator framework for internal use. Improved observability by simplifying tech stack using OpenTelemetry collector and splunk(+signalfx). Built Kubernetes operators to standardize deployments and configuration rollouts, reducing manual ops toils. Led a team of three engineers to modernize a legacy Node/Angular platform, cutting vulnerabilities from 228 (28 critical) to 26 (0 critical), significantly improving security posture and compliance. Increased automated test coverage by 36% across 60k+ LOC, strengthening regression detection and release stability. Designed and implemented a scalable multichannel notification service supporting in-app, email, and SMS fan-out. Facilitated design sessions across teams to align API contracts and architectural standards, improving system interoperability. Mentored middle developers, conducted code reviews, and trained colleagues on Go and cloud-native best practices.

• Reduced vulnerabilities from 228 (28 critical) to 26 (0 critical)
• Increased automated test coverage by 36% across 60k+ LOC

Senior Go Software Engineer

Architected and delivered core banking APIs and microservices with worker pools and async schedulers, sustaining 10k RPS at 99.9% uptime. Introduced gRPC and Kafka to decouple services and enable real-time event streaming; leveraged Redis for caching, prefetching, and rate limiting under peak load. Optimized PostgreSQL queries and indexes, reducing p95 latency on critical endpoints by 60%. Partnered with product owners and QA teams to refine SLAs, ensuring compliance with banking regulations.

• Sustained 10k RPS at 99.9% uptime
• Reduced p95 latency on critical endpoints by 60%

Middle Go Software Engineer

Delivered transaction-safe financial APIs handling millions in monthly volume; automated audit reporting reduced manual preparation time by 40+ hours/month. Optimized banking integrations by batching queries and restructuring transactions, cutting average response times by 45%. Collaborated with cross-functional teams to enhance compliance and security in financial data handling.

• Reduced manual audit preparation time by 40+ hours/month
• Cut average response times by 45%

Junior→Middle Software Engineer

Developed backend APIs and third-party integrations for a large oil & gas client, supporting enterprise-scale operations.