Senior Software Engineer - Backend - TKC

Senior Software Engineer - Backend

Role Overview

We are looking for a highly capable Senior Backend Engineer to design, build, and scale cloud-based SaaS platforms and enterprise-grade web applications, with a strong focus on Mortgage Finance domain solutions. This role offers the opportunity to work on building an enterprise-class product from the ground up, leveraging modern cloud infrastructure, microservices architecture, and distributed systems. The ideal candidate brings solid end-to-end development experience-from system design to production deployment-and thrives in solving real-world, high-impact problems.

Key Responsibilities

• Develop and scale cloud-native web applications and SaaS platforms in a backend-focused role
• Work as part of a high-performance engineering team building Mortgage Finance technology solutions
• Contribute to the end-to-end product lifecycle: architecture, design, development, deployment, and optimization
• Design and implement microservices-based and event-driven architectures
• Build high-performance RESTful APIs / GraphQL services for scalable applications
• Architect and deploy systems using AWS cloud infrastructure
• Work extensively with AWS services such as Lambda, SQS, SNS, API Gateway, EC2, S3, RDS
• Design and optimize databases using MySQL/PostgreSQL (SQL) and MongoDB/DynamoDB (NoSQL)
• Build and deploy containerized applications using Docker and Kubernetes
• Ensure high availability, scalability, performance, and fault tolerance of systems
• Solve complex engineering problems with clean, maintainable, and scalable code
• Deliver rapid product iterations based on user feedback and performance metrics
• Collaborate with cross-functional teams (Product, Frontend, DevOps)
• Drive adoption of engineering best practices, frameworks, and modern technologies
• Participate in and influence architecture and product decision-making

Technical Skills & Requirements

Core Backend & Programming

• Strong experience in Node.js ecosystem (mandatory)
• Proficiency in JavaScript / TypeScript
• Working knowledge of Python (preferred)
• Experience with backend frameworks: Express.js, NestJS, Fastify

Architecture & System Design

• Microservices architecture
• Distributed systems (scalability, availability, fault tolerance)
• Event-driven systems (SQS, SNS, Kafka, Pub/Sub)
• Ability to design large-scale, production-grade systems

API & Integration

• RESTful APIs
• GraphQL
• Integration with third-party services and external APIs

Database & Data Layer

• Relational Databases: MySQL, PostgreSQL
• NoSQL Databases: MongoDB, DynamoDB
• Data modeling, query optimization, indexing, and performance tuning

Cloud & Infrastructure

• AWS (mandatory): Lambda, SQS, SNS, EC2, S3, RDS, API Gateway
• Exposure to GCP
• Experience in serverless and cloud-native architectures

DevOps & Deployment

• Docker (mandatory) and containerization
• Kubernetes (preferred)
• CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI)
• Infrastructure as Code (Terraform / CloudFormation)

Performance, Security & Observability

• Caching (Redis, Memcached)
• Monitoring tools (Prometheus, Grafana, ELK stack)
• Authentication & Authorization (OAuth, JWT)

Experience Requirements

• 5-7+ years of full-time software development experience
• Proven experience in building SaaS platforms, software products, or web-based applications
• Minimum 3+ years of experience in microservices architecture OR delivery of multiple large-scale products
• Strong hands-on experience in Node.js-based backend systems (mandatory)
• Experience in building cloud-native applications on AWS
• Demonstrated ownership of end-to-end product development (design deployment scale)