Senior Backend Developer – Crypto/Blockchain (6+ Yrs)

Winzons; India; On-site; INR 900,000 - 1,300,000; Full time

Job summary

Borderless Softtech in Bangalore, India is seeking a Senior Backend Developer to architect, build, and scale high-throughput backend systems in the Crypto/Blockchain domain. Youll own critical financial workflows and collaborate with cross-functional teams to deliver robust services.

Based in Bangalore, this full-time role focuses on system design, reliability, and performance, including integrations with crypto rails and payment partners, while mentoring engineers and promoting best practices.

Qualifications

• 6–8 years backend engineering experience with architecture ownership.
• Strong understanding of distributed systems and high-throughput workloads.
• Experience building low-latency systems and scalable APIs.

Responsibilities

• Design and own scalable backend architecture.
• Build high-performance APIs handling real-money transactions.
• Lead system design discussions and technical decisions.
• Architect reliable integrations with financial institutions, brokers, and crypto providers.
• Improve system resilience and observability.
• Optimize databases and reduce latency across services.
• Establish engineering best practices and mentor junior engineers.
• Handle production incidents and drive long-term fixes.

Skills

Backend engineering

Architecture ownership

Distributed systems

High-throughput workflows

Low latency

REST APIs

System design

Tools

Node.js

Python

Express.js

FastAPI

PostgreSQL

MongoDB

Redis

Kafka

RabbitMQ

AWS

Docker

CI/CD

Job description

Company Name: Borderless Softtech

Job Role: Senior Backend Developer - Crypto/Blockchain Domain

Experience Required: 6 to 8 Years

Employment Type: Full-Time

Location: Bangalore, India

Industry: Fintech / Blockchain / Digital Assets

Tech Stack: Node.js, Python, FastAPI, Express.js, PostgreSQL, MongoDB, Redis, Kafka, RabbitMQ, AWS, Docker, CI/CD

Domain Focus: Crypto, blockchain, cross-border payments, financial systems

Role Overview

Were looking for a Senior Backend Engineer who can architect, build, and scale critical backend systems. Youll work on high-throughput financial workflows, third-party integrations, and transaction-heavy systems - potentially including crypto/blockchain rails as we expand.

This is not a ticket-closing role. This is a systems-thinking, architecture-owning role.

What Youll Do

• Design and own scalable backend architecture
• Build high-performance APIs handling real-money transactions
• Lead system design discussions and technical decisions
• Architect reliable integrations with financial institutions, brokers, payment partners, and crypto/blockchain providers
• Improve system resilience, observability, and fault tolerance
• Optimize databases and reduce latency across services
• Establish engineering best practices and mentor junior engineers
• Handle production incidents and drive long-term fixes

Tech Stack

• Our backend is primarily built on Node.js, with Python used for select services.
• We use Express.js and FastAPI to build scalable APIs.
• Our data layer runs on PostgreSQL and MongoDB, with Redis used for caching and performance optimization.
• We leverage Kafka and RabbitMQ for asynchronous and event-driven workflows.
• Our infrastructure is hosted on AWS, with Docker and CI/CD pipelines enabling smooth deployments.
• We design and maintain REST APIs and Webhooks for integrations.
• Infrastructure : AWS / GCP (EC2, RDS, S3, Lambda, IAM, VPC and equivalent)
• Containerization & CI/CD : Docker, automated pipelines
• API Standards : REST, Webhooks, async callbacks
• Security : OAuth2, JWT, encryption at rest and in transit

What Were Looking For

• 6-8 years of strong backend engineering experience with 2+ years leading architecture or owning critical systems
• Deep understanding of distributed systems and system design
• Experience building high-transaction, low-latency systems
• Strong experience with database optimization and scaling
• Production experience with AWS and google cloud infrastructure
• Experience in crypto / blockchain / digital assets infrastructure is highly preferred

Domain Knowledge (Highly Preferred)

• Crypto / blockchain infrastructure
• Wallet architecture (custodial or non-custodial)
• On-chain vs off-chain transaction workflows
• Stablecoins, token transfers, gas mechanics
• Banking rails (ACH, SWIFT, RTGS, SEPA)
• Understanding of compliance-sensitive systems (KYC/AML flows)

Leadership & Ownership

• Strong technical decision-making skills
• Ability to balance speed vs. system safety
• Comfortable operating in high-accountability environments
• Clear communicator with product and business stakeholders

Why Borderless?

• A Global Impact : Youll help people across Asia, the Middle East, and India unlock global investing opportunities.
• A Supportive Team : Work with smart, passionate colleagues who are as committed to your growth as you are to theirs.
• Exciting Growth : Be part of an innovative platform thats changing how people invest globally - every day brings new opportunities!
• A Fun Environment : Work hard, play hard, and enjoy the dynamic culture of a startup thats pushing the boundaries in fintech!