What Jobs are available for Rails Developer in Hong Kong?

Algo & Infrastructure

Shenzhen/Hong Kong

Full-Time

Job Responsibilities

• Develop, implement and maintain quality, scalable and high-performing real time trading and analysis applications; from conception right through to delivery
• Balance the need for the quick delivery with designing and building quality, scalable trading architecture that meets the short and long term needs of the business
• Develop high-volume, low-latency financial database
• Create and maintain documentation around features and configuration to save our users time
• Keep code easy to maintain and keep it easy for others to contribute

Job Requirements

• Bachelor/Master in Computer Science, Software Engineering or a related field
• 2~3 years of professional experience in Financial/Brokage Industry
• Experience with one or more general purpose programming languages, including but not limited to: Java, C/C++, C#, Python, Golang
• A solid understanding of software construction
• The ability to naturally follow good development practices like test automation, CI/CD, source version control, etc
• An awareness of the following technologies: MySQL, Redis, Memcached, Docker, Kafka, Git, Jenkins Fluent in Mandarin and English

Personality Fit

• Innovative & strives for continuous technological advancement
• Self-directed and working productively under minimal supervision
• Excellent in explaining complex technical issues to non-technical personnel
• Able to manage multiple streams of communications and quick in adaptability and shifting priority based on business needs
• Innovative & strives for continuous technological advancement; Passionate in Fin-tech field & Financial Markets

EDPS Systems Limited is currently seeking a Backend Developer to join our team.

Responsibilities:

Design, develop, and maintain robust backend services and APIs (RESTful / GraphQL) with strong logical workflows.

Lead and optimise ETL (Extract, Transform, Load) processes for ingesting and transforming data from diverse internal/external sources.

Work extensively with JSON data formats for API communication and configuration.

Build and maintain data collection pipelines to ensure reliable, secure, and scalable system data flows.

Collaborate with data engineers and software teams to support AI/ML model integration into backend services.

Manage both relational (PostgreSQL/MySQL) and NoSQL (MongoDB) databases with performance and security in mind.

Apply QA testing principles : write unit/integration tests for APIs and ETL workflows, support automated test pipelines, and follow the team's QA workflow to ensure reliability.

Participate in Agile sprints , contributing to CI/CD pipelines and peer reviews.

Monitor, troubleshoot, and optimise backend systems for performance and fault tolerance.

Participate in deployment workflows , understanding progression from development → staging → production.

Collaborate with frontend and data engineers to ensure smooth system integration.

Requirements:

Bachelor's degree in Computer Science, Software Engineering, IT, or equivalent practical experience.

2+ year backend development experience (junior–mid level).

Proficiency in at least one backend language ( , Python, or Java ).

Solid experience working with JSON for API communication.

Basic knowledge of API design (REST/GraphQL) and microservices concepts.

Familiarity with relational and NoSQL databases ( PostgreSQL, MySQL, MongoDB ).

Understanding of deployment workflows (staging, production, CI/CD basics).

Experience with Git for version control and team collaboration.

Preferred (Bonus) Skills:

Exposure to ETL tools (Airflow, Luigi) or custom ETL pipelines.

Familiarity with AI/ML system integration .

Knowledge of real-time streaming platforms (Kafka, RabbitMQ).

Hands-on with cloud platforms (AWS, GCP, Azure) and containerisation basics (Docker).

Salary:

Salary will be commensurate with qualifications and experience.

Application:

Please submit your resume along with your current and expected salary. Personal data collected will be treated confidentially for recruitment purposes. Candidates not invited for an interview within six weeks may consider their applications unsuccessful.

Equal Opportunity Employer:

We are an equal opportunity employer and welcome applications from all qualified candidates. Personal data collected will be handled confidentially by authorized personnel for recruitment-related purposes.

Address:

Room 1202, 12/F, Harcourt House, 39 Gloucester Road, Wanchai, Hong Kong.

Website:

All applications applied through our system will be delivered directly to the advertiser and privacy of personal data of the applicant will be ensured with security.

Full-time

Job Description: Backend Developer (One-Click Platform Redesign)

Location: Hong Kong (or remote with strong collaboration overlap)

Position: Full-time

About Flowcite

Flowcite is an all-in-one research and publishing platform, enabling academics, students, and professionals to streamline their entire research workflow — from literature discovery and citation management to AI-powered writing, collaboration, and publishing.

We are now entering a new phase: transforming Flowcite into a truly "One-Click Platform" — radically simplifying the academic research experience with intuitive, seamless workflows. To achieve this, we are looking for a visionary Backend Developer who can rebuild the entire platform experience from the ground up.

Role Overview

As the Backend Developer, you will be an integral part of the development cycle of Flowcite's user experience. You will combine design thinking, modern interface design, and backend development skills to create a highly intuitive, elegant, and user-centric platform.

This role is ideal for someone with both a strong academic background (to deeply understand researcher needs) and proven expertise in turning complex SaaS products into simple, delightful digital experiences.

Key Responsibilities

• Conduct deep user research with academics, students, and institutional partners to map workflows and pain points.
• Design, develop, and maintain backend applications using Python or Typescript.
• Implement and optimize APIs for seamless integration with front-end components and third-party services.
• Write comprehensive unit and integration tests to ensure code quality and reliability.
• Collaborate with cross-functional teams to gather and refine requirements and specifications.
• Continuously monitor application performance and identify opportunities for improvements.
• Document and maintain technical specifications and guidelines.
• Explore and integrate Large Language Models (LLMs) to enhance our tools and user experiences.
• Participate in code reviews and provide constructive feedback to team members.
• Stay current with emerging technologies and industry trends to ensure best practices.

Qualifications & Experience

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 3+ years of experience in backend development with a strong focus on Python or TypeScript.
• Solid understanding of testing frameworks and methodologies (e.g., unittest, pytest).
• Experience with relational and non-relational databases (e.g., PostgreSQL, MongoDB).
• Familiarity with RESTful API design and modular architecture.
• Knowledge of containerization technologies (e.g., Docker, Kubernetes) is a plus.
• Experience with LLMs or related NLP technologies is highly desirable.
• Strong problem-solving skills and the ability to work independently with minimal supervision.
• Excellent communication skills and the ability to collaborate with diverse teams.

What We Offer

• Competitive salary and the chance to own the UX/UI vision of a global SaaS platform.
• Opportunity to transform how academic research is done — simplifying millions of researchers' daily workflows.
• Collaborative work with an international team of developers, product leaders, and academic experts.
• A creative and ambitious environment where your designs directly shape Flowcite's success.

How to Apply

Please send your CV, portfolio (with relevant UX/UI projects), and a short cover letter explaining how you would approach redesigning Flowcite into a "One-Click Platform."

Job Type: Full-time

Pay: $12, $22,416.70 per month

Work Location: Remote

About Us OneDragonPay is on a mission to build the engine of modern commerce. We engineer secure, scalable, and reliable infrastructure to make online payments seamless for businesses and consumers globally. We're looking for a skilled backend developer to help us build and scale our core systems.

As a Backend Developer at OneDragonPay, you will be a cornerstone of our engineering team, responsible for architecting and building the mission-critical services that power our entire platform. You will engineer the high-throughput, fault-tolerant systems that process every transaction, manage custodial wallets, and ensure the absolute integrity of our financial data. This is a high-impact role where your work will directly contribute to the security, reliability, and performance of a platform handling significant transaction volume.

• Develop Core Payment Services: Design, build, and maintain the core backend services for our payment processing engine using , TypeScript, and the NestJS framework. This includes transaction lifecycles, ledger systems, and payout mechanisms.
• Architect Secure Integrations: Implement robust and secure integrations with third-party payment gateways (e.g., Stripe, Adyen), banking APIs, custodial services, and KYC/AML verification providers.
• Enforce Rigorous Security & Compliance: Implement and uphold stringent security protocols (e.g., OWASP Top 10) and data protection measures. You will ensure all systems are designed to be compliant with standards like PCI-DSS and GDPR.
• Optimize for Performance & Scale: Engineer and optimize applications for maximum speed, low latency, and scalability to handle high-volume, concurrent transaction loads.
• Ensure Data Integrity: Design and implement idempotent APIs to guarantee safe and reliable transaction processing, preventing duplicate charges and data inconsistencies.
• Collaborate and Deploy: Work within a cross-functional agile team to deliver high-quality, tested code. You'll leverage our CI/CD pipelines to deploy services efficiently and reliably.
• Documentation: Create clear and thorough documentation for APIs, system architecture, and operational procedures.

• 3-5 years of professional experience in backend development using and TypeScript.
• Proven experience with NestJS or similar structured frameworks (e.g., with a strong architectural pattern).
• Deep understanding of relational databases (PostgreSQL preferred), including complex queries, transactional integrity (ACID), and performance optimization.
• Experience designing and building secure, scalable RESTful APIs.
• Hands-on experience with containerization (Docker) and modern CI/CD practices.
• Exceptional problem-solving, debugging, and analytical skills.

• Direct experience building backend systems for payment gateways, digital wallets, trading platforms, or other high-transaction fintech products.
• Experience with microservices or event-driven architectures (using tools like RabbitMQ or Kafka).
• Proficiency with cloud services (AWS, GCP, or Azure), particularly managed databases, serverless functions, and container orchestration (Kubernetes).
• Familiarity with infrastructure-as-code tools like Terraform.
• Knowledge of cryptocurrency principles and blockchain integration.

Perm

Your new role

Backend Developer

Responsibilities

• Responsible for developing the core functions of the Internet financial platform, build the technology infrastructure that supports digital customer platform
• Collaborate with senior developers and stakeholders to gather user requirements and contribute to system analysis
• Assist in preparing system documentation, including functional specs, design outlines, and user guides
• Develop and modify application features based on user needs, with guidance from experienced team members

Requirements

• Computer Science or related Engineering Bachelor (or above) from university
• 3 years or more working experience
• Proficient in Java,
• Knowledge of frameworks/systems (e.g., MuleSoft)
• Experience in AI-related projects is a plus.
• Experience with Azure is a plus.

What you need to do now

If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV to

If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion on your career.

Responsibilities :

• Development of back end services and APIs to server our Mobile and Web front ends
• DevOps automation
• Performance testing, capacity planning and scalability engineering
• Management of relational databases such as MySQL and Postgres
• Writing test automation
• Scripting
• Management of AWS or similar cloud based backend infrastructures
• Defining best practices and guidelines for our backend engineering.

Requirements :

• At least 3 years of backend related development experience;
• Experienced with JSON, Graphql, Golang; Experience with Python will be an advantage;
• Strong respect for Databases both SQL and non-SQL;
• Experience with MySQL or Postgress and MongoDB;
• Experience using Digital Ocean, AWS, or Google Cloud;
• Experience in Gen AI or machine learning-focused company will be an advantage;
• Candidates with more experience will be considered for a senior role.

Responsibilities :

• Development of back end services and APIs to server our Mobile and Web front ends
• DevOps automation
• Performance testing, capacity planning and scalability engineering
• Management of relational databases such as MySQL and Postgres
• Writing test automation
• Scripting
• Management of AWS or similar cloud based backend infrastructures
• Defining best practices and guidelines for our backend engineering.

Requirements :

• At least 3 years of back end related development experience
• Experienced with JSON, Graphql,
• Strong respect for Databases both SQL and non-SQL
• Experience with MySQL or Postgress and MongoDB
• Experience using Digital Ocean, AWS, or Google Cloud.

Key Duties & Responsibilities

• Responsible for back-end development and maintenance of AI products to ensure product stability
• Design and implement API interfaces by using Python for back-end development
• Make use of different language models to solve problems from departments using AI
• Understand cloud services (such as S3, MySQL, Redis etc.) for data storage and maintain
• Use Docker and Kubernetes (K8S) containerized deployment and management for the application
• Assist in the design and optimization of AI application development including optimization of Prompt, RAG (Retrieval-Augmented Generation), and implement of Multi-Agent
• Ensure the stability of AI products and its functions
• Compose code and technical documentation and assist in code reviews
• Monitor and optimize the application's performance to resolve problems in production environment

Requirements and Qualifications

• Minimum 3 year's working back-end experience especially using Python
• Proficiency in cloud services (such as S3, MySQL, Redis etc) and using Docker and Kubernetes (K8S) for implementing containerized deployment and management
• Detailed knowledge of common AI application and development
• Experienced in coding
• Familiarity with optimization of Prompt, RAG (Retrieval-Augmented Generation), and implement of Multi-Agent experience will be an advantage
• Knowledge of front-end technologies is a plus, preferably with experience in React or Vue

Responsibilities:

• Design, build, and maintain efficient backend systems.
• Manage and maintain version control.
• Create and maintain servers/databases.
• Collaborate with the development team to meet business requirements.

Requirements:

• Higher diploma or degree in Computer Science, IT, Engineering, or equivalent.
• Minimum of 1 years' relevant experience.

• Good hands-on experience in:

• Languages: PHP 8 (Laravel 12), HTML, CSS, jQuery, JavaScript

• Database: MySQL
• Knowledge of REST API, JSON, and SQL.
• Good communication skills in English.
• Knowledge of Docker and Ant Design is a plus.

Position offered would be depending on the qualifications and experience of the candidate.