Hyperledger Fabric Developer

We are hiring a Blockchain Developer to build secure smart contracts and decentralised applications.

Responsibilities

• Write and audit Solidity smart contracts
• Build dApps with Web3.js or Ethers.js
• Test and deploy contracts with Hardhat or Foundry
• Optimise gas usage and contract security

Requirements

• 1+ years of Solidity development
• Experience deploying contracts on Ethereum or EVM chains
• Strong understanding of smart-contract security

Senior Blockchain Developer

Location: India, Remote

Employment Type: Full-Time / Contract

Department: Engineering

About Us

OpenAssets is building open standards for the next generation of capital markets, providing the trusted foundation for real-world asset tokenization and digital currencies.

We specialize in alternative asset digitization, offering regulatory-conscious tools to design, issue, and manage digital assets in complex financial environments. We also develop loyalty solutions that turn customer engagement into programmable digital assets, helping brands create personalized experiences that drive growth.

OpenAssets operates at the intersection of finance, technology, and regulation focused on building secure, scalable, and open infrastructure for the future of digital markets. Join OpenAssets and be part of shaping the future of digital finance!

Overview

We are seeking a Blockchain Developer to lead the technical implementation of our Web3 infrastructure. In this role, you will be responsible for the end-to-end lifecycle of smart contracts and their integration into our broader financial ecosystem. You will act as a technical authority on blockchain security, scalability, and architecture, ensuring our platform meets the rigorous demands of institutional digital finance.

What You’ll Do

Smart Contract & Blockchain Development

• Design, develop, test, and deploy smart contracts and blockchain applications.
• Build and maintain secure, scalable backend services for blockchain products.
• Develop and maintain cross-platform applications that integrate with on-chain infrastructure.
• Integrate wallets, payment systems, and blockchain APIs with existing systems.
• Optimize for gas efficiency, transaction latency, reliability, and scalability.

Security & Quality

• Implement and uphold best practices for blockchain security and smart contract auditing.
• Review smart contracts and backend code for security vulnerabilities and performance issues.
• Support audits, security reviews, and production releases.
• Maintain high test coverage and disciplined release processes.

Collaboration & Communication

• Collaborate with product and engineering teams to define and deliver technical requirements.
• Communicate technical concepts clearly to both technical and non-technical stakeholders.
• Mentor junior engineers and contribute to a strong engineering culture.
• Stay current with emerging blockchain technologies, DeFi, and Web3 infrastructure trends.

Qualifications & Experience

• Experience: 3+ years of software engineering experience with at least 3+ years of hands-on blockchain/Web3 development.
• Blockchain Core: Strong experience with Solidity and EVM-compatible chains (Ethereum, Polygon, and others).
• Production Deployment: Proven track record building, testing, deploying, and maintaining smart contracts in production.
• Deep Technical Knowledge: Solid understanding of blockchain architecture, including consensus mechanisms, gas optimization, wallet flows, token standards, and transaction lifecycles.
• Full-Stack Proficiency: Good understanding of the MERN stack (MongoDB, Express.js, React, Node.js) and how full-stack applications integrate with blockchain infrastructure.
• Backend Expertise: Proficiency in Node.js and TypeScript with experience building RESTful backend applications.
• Testing & Tooling: Experience with smart contract and backend testing frameworks (e.g., Foundry, Hardhat, Mocha, Jest) and Web3 libraries like Ethers.js or Web3.js.
• Cloud Infrastructure: Hands-on experience with AWS, including deploying, managing, and scaling services like EC2, S3, Lambda, and RDS.
• Databases & DevOps: Comfortable with relational (PostgreSQL) and non-relational (MongoDB) databases, Git, and collaborative development workflows.
• Soft Skills: Strong communication skills in English with the ability to articulate technical concepts to diverse stakeholders.

Nice to Have

• Familiarity with the Move language (Sui, Aptos).
• Experience with smart contract audit tooling such as Slither, Mythril, or Manticore.
• Exposure to RWA tokenization, DeFi, stablecoins, NFTs, staking, or bridging protocols.
• Professional background in fintech, payments, or regulated blockchain use cases.

We are committed to providing equal opportunity for qualified applicants to contract positions, regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status. This is a contract opportunity, not a direct employment role.

We are looking for an experienced Developer with experience in compiled languages and ready to work in Golang. You will be responsible for the Development of distributed services GUI and terminal application in Golang. Candidates should have strong understanding of Algorithms, Memory Management and Networking 

Required Experience & Skills:

• C/C++/C#/Go/Rust. 
• Networking, Database, Linux, Docker.  
• Multiprocessing, Multithreading, Distributed computing, Thread synchronization techniques.
• Communication protocols, gRPC, MQTT, REST, Modbus, OPC... 
• GUI Programming 
• Testing, Debugging and performance optimization. 
• REST APIs, MySQL, Redis
• Proficiency with Git for version control and collaborative development workflows.

Build production-grade cloud infrastructure that powers enterprise applications with cutting-edge DevOps practices.

What you'll do:

• Design CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI)
• Containerize apps with Docker, deploy on Kubernetes clusters
• Manage infrastructure as code (Terraform, CloudFormation)
• Set up monitoring (Prometheus, Grafana, ELK Stack)
• Cloud migrations (AWS EC2, EKS, RDS → GCP equivalent)
• Optimize costs and performance for live production systems

What we need:

• Basic Python/Bash scripting
• Docker basics, Git workflows
• Cloud exposure (AWS/GCP/Azure free tier projects)
• Problem-solving mindset, eagerness to learn

Real impact:

• Deploy apps used by 1000+ daily users
• Work with senior DevOps engineers on client deliverables
• Build portfolio for FAANG-level interviews

We are seeking Senior Backend Engineers who can hack around multiple technologies and build highly scalable, low-latency, distributed systems with RESTful services. You will be responsible for developing new software products (internal) and solving complex technical challenges for scale-ups and enterprise companies. You should excel in working with large-scale applications and frameworks and have outstanding communication and leadership skills.

Responsibilities—

• Writing clean, high-quality, high-performance, and maintainable code.
• Solving complex technical problems.
• Performing an objective analysis of the problem statement and coming up with an unbiased technical solution before writing a single line of code.
• Coordinating cross-functionally to ensure the project meets business objectives and compliance standards.
• Participating in and driving code reviews.
• Building robust, secure, and scalable microservices.
• Implementing RESTful services with a metric-driven API Gateway.
• Ensuring sub-second server response and will be responsible for implementing relational, document, key, object, or graph data stores, index stores and messaging stores as needed.
• Tracking defects and work with business owners and users to triage bugs and manage backlog
• Taking ownership to run and maintain Cloud infrastructure.
• Evaluating relevant technologies, influencing and driving architecture and design discussions.
• Architecting & designing the platform.
• Mentoring junior engineers helping them grow, performing code reviews, system monitoring & delegation.
• Writing documentation & create engineering processes.
• Working as an individual contributor.
• Helping drive KPIs with Product.
• Taking ownership of backend systems.
• Helping with unit tests & QA process.
• Scaling the engineering team.
• System scaling to hundreds of millions of users.
• Working with product managers and designs.

Requirements—

• Overall 5-10 years of experience in software development with a strong base in Golang/Java/Python and a degree in Computer Science(optional).
• Experience with Go, K8, Docker, AWS, and CI/CD.
• Experience with micro web frameworks – like Springboot, Gin/Mux.
• Experience in working with microservice architectures, Transactional systems, and Distributed environments.
• Exposure to building RESTful APIs with monitoring, fault tolerance, and metrics (with something like Hystrix).
• Experience with MySQL, and NoSQL (Cassandra, Redis, DynamoDB).
• Experience in server-side services using ElasticSearch and ESB - Camel, ActiveMQ.
• DevOps experience.
• Experience with AWS stack.
• Excellent attention to detail.
• Outstanding written and verbal communication skills.
• To be a self-starter who can work well with minimal to no guidance in a fluid environment.
• To be excited by challenges surrounding the development of highly scalable & distributed systems.
• To be agile and able to adapt quickly to changing requirements scope and priorities.
• To be experienced in working on massively large-scale data systems in production environments.
• To have led or mentored an engineering team before(optional).
• To have contributed to open-source projects.
• To have a strong drive & desire for continued growth.
• Proficiency in English.
• Experience with Web3(optional).

Benefits—

• Best-in-class salary: We hire strong talent and compensate accordingly.
• Proximity Talks: Meet and learn from designers, engineers, product leaders, and AI practitioners.
• Continuous learning: Work with a world-class team and stay close to the latest in AI, engineering, and product development.
• High-impact work: Build AI-first systems and products used at scale by global clients.

About us—

Proximity is the trusted technology, design, and consulting partner for some of the biggest Sports, Media, and Entertainment companies in the world. We’re headquartered in San Francisco and have offices in Palo Alto, Dubai, Mumbai, and Bangalore.

Since 2019, Proximity has built high-impact, scalable products used by millions of users every day. Today, we are a global team of engineers, designers, product managers, and experts solving complex problems and building cutting-edge technology at scale.

Role: Golang Developer

Experience: 4+Years

Work Location: Mumbai(Kanjurmarg)

Notice Period: Immediate

Required Skills

• Golang: 4+years hands-on experience building production services.
• API Protocols: REST/JSON, gRPC, protobuf; API versioning and backward compatibility.
• Architecture: Clean Architecture, DDD (aggregates, repositories), SOLID, hexagonal architecture.
• Databases: PostgreSQL/MySQL; indexing, query optimization, transactions, isolation levels, migrations (e.g., golang-migrate).

Nice-to-Have

• Event-driven systems (Kafka/RabbitMQ), CQRS and Saga patterns.
• Concurrency: Goroutines, channels, sync primitives (mutex, wait groups), context cancellation, worker pools.
• Containers & Cloud: Docker, Kubernetes; familiarity with AWS/GCP/Azure (IAM, networking, managed DBs).
• CI/CD & Git: Branching strategies, automated tests, code quality checks, artifacts.
• Caching (Redis/Memcached), rate limiting, and feature flags.
• Security: OAuth2/OIDC, JWT, mTLS, secrets management (Vault/SSM).
• Infrastructure as Code (Terraform), Helm charts.
• Experience with performance tooling.

Education

· Bachelor’s in Computer Science/Engineering

Looking for strong experience in Java, Spring Boot, Spring Cloud, Microservices, System Design, Kafka, Redis, Cloud, Docker & Kubernetes.

FinTech / Banking experience will be an added advantage.

Golang Developer

Experience: 6-8 years

Employment Type: Contractual(2 months), Full-time

Desired Skill: Golang, GRPC, RestAPIs, AWS

Work Mode: Pune, India

Availability: Immediate Joiners

This is the contractual opportunity on a full time basis.

Must have skills:

● 6+years of Software Development experience

● 5+years of GoLang programming; Prefers additional proficiency in either Java or Python

● Knowledgeable in writing REST APIs

● Comfortable programming in production grade systems

● Experience with building HTTP based services

● Strong background of optimizing performance

● Familiarity with event-driven systems

● Experience dealing with highly concurrent, distributed architectures/systems.

Good to have skills:

• Exposure to relational databases
• Experience with Cloud Providers such as AWS is an advantage; cloud privileged access (CIEM, IAM roles, ephemeral credentials)
• Experience using Terraform to manage infrastructure as code would be an advantage
• Hands-on experience building or extending Privileged Access Management (PAM) capabilities — credential vaulting, secrets management, password rotation, just-in-time / time-bound privileged access
• Working knowledge of privileged session management and session recording — session proxying/brokering, keystroke and video capture, session replay, live monitoring and termination, tamper-evident audit trails
• Familiarity with remote access protocols and gateways — SSH, RDP, HTTPS/web-based sessions; protocol proxying and man-in-the-middle session interception

We are hiring a Kubernetes Engineer to run and scale our container platform.

Responsibilities

• Manage production Kubernetes clusters
• Write Helm charts and Terraform modules
• Set up monitoring, alerting and autoscaling
• Improve CI/CD pipelines and deployments

Requirements

• 2+ years running Kubernetes in production
• Strong Docker and CI/CD experience
• CKA certification is a plus

We are looking for a senior, hands-on DevOps and Backend Integration Engineer to lead the production deployment and integration of an existing application ecosystem.

The platform currently includes a Flutter mobile application, a Laravel backend and admin panel, Node.js/AdonisJS APIs, a Python recommendation service, Redis, MySQL, Nginx, and AWS S3.

This is not a greenfield development role. The primary objective is to audit the existing system, establish a reliable production infrastructure, integrate all services, migrate traffic safely, and complete the production launch.

Responsibilities

• Audit the existing Hostinger environment, source repositories, application dependencies, database, Redis configuration, and deployment process.

• Design a secure and maintainable production architecture for Laravel, Node.js/AdonisJS, Python, Redis, MySQL, Nginx, AWS S3, and the Flutter application.

• Provision and configure Linux production servers, runtimes, SSH access, environment variables, permissions, SSL, and basic server security.

• Deploy and configure the Laravel application, admin panel, APIs, scheduled tasks, queues, and database connectivity.

• Deploy the Node.js/AdonisJS services with a reliable build, startup, logging, and process-management setup.

• Build a Git-based CI/CD pipeline for staging and production, including secrets management, deployment validation, and basic rollback handling.

• Configure Nginx as a reverse proxy and route traffic between Laravel and Node.js services using API versions and endpoint rules.

• Install and integrate Redis for agreed caching, queue, or session-management requirements.

• Configure AWS S3, IAM permissions, secure file access, and photo-upload integration to replace local server storage.

• Integrate the existing Python recommendation service with the Node.js backend, including timeout, retry, error-handling, and service-health scenarios.

• Support controlled migration of API traffic from Laravel to Node.js while preserving existing API contracts.

• Verify Flutter API compatibility, production environment configuration, authentication flows, media uploads, and backend-related integration issues.

• Conduct end-to-end, regression, and smoke testing across Flutter, Nginx, Laravel, Node.js, Redis, Python, MySQL, and AWS S3.

• Perform production cutover, validation, troubleshooting, and technical handover.

• Deliver clear architecture, deployment, routing, environment, rollback, and operational documentation.

Required Experience

• 5+ years of professional backend, DevOps, infrastructure, or platform-engineering experience.

• Strong hands-on Linux server administration and production deployment experience.

• Proven experience deploying and operating Laravel/PHP and Node.js applications.

• Strong knowledge of Nginx reverse proxy configuration, SSL, upstream services, and API routing.

• Experience creating CI/CD pipelines using GitHub Actions, GitLab CI, Bitbucket Pipelines, or a comparable platform.

• Practical experience with AWS S3, IAM permissions, secure media uploads, and cloud-storage integration.

• Experience with Redis, MySQL, background workers, queues, scheduled jobs, and application caching.

• Experience integrating Python services or machine-learning/recommendation APIs with Node.js applications.

• Good understanding of REST APIs, API versioning, authentication, secrets management, logging, monitoring, backups, and rollback procedures.

• Ability to independently investigate an existing codebase and resolve production integration problems.

• Strong written English and the ability to produce clear technical documentation.

Nice to Have

• Experience with AdonisJS.

• Experience supporting Flutter applications and mobile backend integrations.

• Experience migrating applications from shared hosting or Hostinger to a production cloud server.

• Experience with Google Maps Platform or location-based application services.

• Docker experience is helpful, although Kubernetes is not required.

Expected Deliverables

• Documented production architecture.

• Fully configured production infrastructure.

• Working Laravel, Node.js/AdonisJS, Python, Redis, MySQL, Nginx, and AWS S3 integrations.

• Functional staging and production CI/CD workflows.

• Tested Laravel and Node.js coexistence with controlled API routing.

• Successful end-to-end production deployment.

• Rollback, deployment, configuration, and operational documentation.

Engagement Details

• Contract duration: approximately 4–5 weeks.

• Work arrangement: remote.

• Availability: candidates should be able to begin shortly and provide regular written progress updates.

• The current Node.js APIs and recommendation algorithm already exist. Major new product features, algorithm redesign, extensive Flutter feature development, and database redesign are outside the initial scope.

How to Apply

Please include:

1. Examples of Laravel and Node.js systems you have deployed to production.

2. Details of a CI/CD pipeline and Nginx routing setup you personally implemented.

3. Your experience integrating Redis, AWS S3, and Python services.