Back End Developer

Recro; Bengaluru; On-site; INR 1,400,000 - 2,200,000; Full time

Job summary

Recro is seeking a backend engineer to lead migration and re-architecture efforts from Python to Go, building high-concurrency Go services and robust data pipelines. You will design and implement migration harnesses, ensure parity with shadow testing, and manage Kafka-based messaging at scale.

Strong MySQL, AWS, and CI/CD expertise are required. You will collaborate with cross-functional teams to deliver reliable, scalable services in a cloud-native environment, applying best practices in

Qualifications

• 3 to 6 years of professional backend engineering experience.
• Strong production expertise in Go alongside deep readability of Python.
• Experience executing migration patterns (shadow testing, dual-writes, response diffing).
• Advanced understanding of Go concurrency primitives and common concurrency pitfall mitigation.
• High-level proficiency with MySQL schema design, query profiling, and connection pool tuning.
• Hands-on experience operating Apache Kafka producers and consumers at scale.
• Proficiency with AWS ecosystem, containerization (Docker), CI/CD, and application profiling/tracing tools.

Responsibilities

• Service Migration & Re-architecture: Lead transition of legacy Python services to Go.
• Cutover & Validation Infrastructure: Architect migration harnesses with shadow traffic and parity checks.
• Schema Evolution & Data Reconciliation: Manage data migrations with backfills and dual-writing checks.
• Go Microservices & Concurrency: Develop high-concurrency Go HTTP APIs and workers.
• Database Management: Oversee MySQL performance and connection pool tuning.
• Event-Driven Messaging: Build Kafka systems with DLQs and error handling.

Skills

Go

Python

System design

Concurrency

MySQL

Kafka

AWS

Docker

CI/CD

Tools

Kafka tooling

CI/CD tooling

Docker tooling

MySQL tooling

Job description

• Service Migration & Re-architecture: Lead the transition of legacy Python services to Go. Read and analyze existing application logic to design idiomatic, performant Go services that follow clean architectural patterns.
• Cutover & Validation Infrastructure: Architect migration harnesses incorporating shadow traffic, response diffing, metric dashboards, and feature flag management to guarantee complete parity and safe rollbacks.
• Schema Evolution & Data Reconciliation: Manage complex data migrations, including field mapping, backfills, dual-writing systems, data consistency verifications, and deterministic cutover checkpoints.
• Go Microservices & Concurrency: Develop high-concurrency Go HTTP APIs, background workers, and event streaming applications. Apply disciplined concurrency patterns (worker pools, context propagation, leak prevention) to support high-throughput operations.
• Database Management: Oversee MySQL query performance and connection management within Go applications. Manage transaction boundaries, connection pool tuning, and live schema migrations.
• Event-Driven Messaging: Build resilient Kafka messaging systems, implementing optimal partitioning, offset management, replay facilities, and error handling via Dead-Letter Queues (DLQs).

Required Qualifications

• Experience: 3 to 6 years of professional backend engineering experience.
• Technical Languages: Strong production expertise in Go alongside deep readability of Python.
• System Design: Demonstrable experience executing migration patterns (shadow testing, dual-writes, response diffing).
• Concurrency: Advanced understanding of Go concurrency primitives and common concurrency pitfall mitigation.
• Database Fluency: High-level proficiency with MySQL schema design, query profiling, and connection pool tuning.
• Streaming Systems: Hands-on experience operating Apache Kafka producers and consumers at scale.
• Cloud & Operations: Proficiency with AWS ecosystem, containerization (Docker), CI/CD, and application profiling/tracing tools.