- Work experience as a Python Developer
- Expertise in at least one popular Python framework (like Django, Flask or Pyramid)
- Knowledge of object-relational mapping (ORM)
- Familiarity with front-end technologies (like JavaScript and HTML5)
- Team spirit
- Good problem-solving skills
- Write effective, scalable code
- Develop back-end components to improve responsiveness and overall performance
- Integrate user-facing elements into applications
- Test and debug programs
- Improve functionality of existing systems
- Implement security and data protection solutions

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Job Overview:
We are looking for a seasoned Senior Backend Engineer (SDE III) with over 5 years of experience to lead, mentor, and grow a high-performing engineering team. The ideal candidate will have extensive hands-on experience in software development, deep technical expertise, and a proven track record of successfully leading large-scale engineering teams and projects. This role requires strategic leadership, the ability to manage complex technical challenges, and the ability to drive innovation while ensuring operational excellence.As a Backend Lead, you will collaborate with key stakeholders across the business, product management, and operations to ensure alignment with the organization’s goals and play a critical role in shaping the technology roadmap and engineering culture.
Key Responsibilities:
- Leadership and Team Development: Lead and inspire a team of engineers, fostering a culture of innovation, accountability, and continuous improvement. Manage the hiring, training, and career development of engineering staff.
- Strategic Planning: Work closely with senior leadership to develop and implement engineering strategies that support business objectives. Define technology roadmaps and ensure alignment with organizational goals.
- Technical Excellence: Guide the team in designing and implementing scalable, robust software systems. Drive the adoption of best practices in architecture, coding standards, and software testing to ensure high-quality product delivery.
- Project and Program Management: Oversee the successful delivery of engineering projects, ensuring deadlines, quality standards, and budget constraints are met. Use agile methodologies to manage the development process and resolve bottlenecks.
- Cross-functional collaboration: Collaborate with Product Management, Design, Business, and Operations teams to define project requirements and deliverables. Ensure the smooth integration of engineering efforts across the organization.
- Risk Management: Anticipate and mitigate technical risks and roadblocks. Proactively identify areas of technical debt and drive initiatives to reduce it.
- Stakeholder Communication: Act as the technical point of contact for stakeholders, providing regular updates on project progress, resource allocation, and performance metrics. Communicate complex technical concepts to non-technical stakeholders.
Required Qualifications:
- Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field.
- 5+ years of experience in software engineering
- Proven track record of successfully delivering large-scale, high-impact software projects.
- Strong understanding of software architecture, design patterns, and scalable system design.
- Expertise in multiple programming languages and modern development frameworks For this role we require expertise in Python/Django and API Development
- Experience with cloud infrastructure (AWS), microservices, and distributed systems.
- Good experience with MySQL and ElasticSearch. Slight experience with other NoSQL and SQL databases.
- Experience in DevOps, CI/CD pipelines, and infrastructure automation.
- Experience in delivering full-stack B2B/SaaS applications including mobile applications, web frontend, and a scalable backend.
- Excellent problem-solving skills, with the ability to diagnose and resolve complex technical challenges.
- Strong communication and interpersonal skills, with the ability to influence and inspire teams and stakeholders at all levels.
Responsibilities :
- Lead the development of the backend systems for our client's first product.
- Build reliable, secure, and performant backend systems.
- Drive test coverage and continuous delivery automation within the team.
- Mentor and provide feedback to teammates.
- You should have a min of 8 years of software development experience and management.
- Can write code that is readable, maintainable, secure, and performant.
- Know the importance of tests and how to approach writing different types of tests, good intuition for REST API design
- Deep understanding of relational databases, transactions, entity-relationship modeling.
- Comfortable writing highly concurrent systems.
- Experienced in using profilers, tuning garbage collection, optimizing SQL queries.
Desired Skills :
- Golang, Java, Python, Ruby, Node.
About us:
HappyFox is a software-as-a-service (SaaS) support platform. We offer an enterprise-grade help desk ticketing system and intuitively designed live chat software.
We serve over 12,000 companies in 70+ countries. HappyFox is used by companies that span across education, media, e-commerce, retail, information technology, manufacturing, non-profit, government and many other verticals that have an internal or external support function.
To know more, Visit! https://www.happyfox.com/
We’re looking for a Senior Backend Engineer to join our engineering team to help build and maintain our growing list of products. You should have prior experience being responsible for building sufficiently complex features by yourself.
Responsibilities:
- Implement product features by writing clean, robust, reusable code with tests
- Conduct peer reviews to keep the codebase a great environment to work on
- Collaborate with Product Managers, Designers and Engineers to deliver high-quality features
- Bring new ideas and best practices to improve the team and the codebase
Requirements:
- 5+ years of professional work experience
- Proficiency in backend programming languages like Python
- Experience working with web application frameworks like Django
- Experience in building web services using relational databases like PostgreSQL or NoSQL databases like MongoDB
- Proficiency in writing highly performant and scalable code
- Experience in building REST APIs and a good understanding of best practices around building APIs
- Good communication skills with an ability to articulate your views
- Excellent analytical and problem-solving skills
Your responsibilities as a backend engineer will include:
- Back-end software development
- Software engineering and designing data models and write effective APIs
- Working together with engineers and product teams
- Understanding business use cases and requirements for different internal teams
- Maintenance of existing projects and New feature development
- Consume and integrate classifier/ ML snippets from Data science team
What we are looking for:
- 4+ years of industry experience with the Python and Django framework.
- Degree in Computer Science or related field
- Good analytical skills with strong fundamentals of data structures and algorithms
- Experience building backend services with hands-on experience through all stages of Agile software development life cycle.
- Ability to write optimized codes,debug programs, and integrate applications with third party tools by developing various APIs
- Experience with Databases (Relational and Non-Relational). Ex: Cassandra, MongoDB, Postgresql
- Experience with writing REST-APIs.
- Prototyping initial collection and leveraging existing tools and/or creating new tools
- Experience working different types of datasets (e.g. unstructured, semi-structured, with missing information)
- Ability to think critically and creatively in a dynamic environment, while picking up new tools and domain knowledge along the way
- A positive attitude, and a growth mindset
Bonus:
- Experience with relevant Python libraries such as Sklearn, NLTK, tensorflow, HuggingFace Transformers
- Hands on experience in Machine learning implementations
- Experience with Cloud infrastructure (e.g. AWS) and relevant microservices
- Good with Humor and Team player
- B.Tech/B.E(Computer Science/Information Technology) and 4+ years of software development experience
- Strong experience in Python
- Strong problem-solving skills, Computer science fundamentals, Data structures, and Algorithms
- Knowledge of Databases such as SQL and Nosql
## Please apply if you have experience working on Trading Applications, all others would be automatically rejected ###
Our Core team develops connectivity software for low latency communication with derivatives exchanges all over the world, as well as real-time position and risk limit monitoring. The team's expertise is also relied upon by other C++ development groups to produce high-quality libraries and frameworks for their application development. We have a high degree of freedom and responsibility to produce technologically advanced solutions to demanding real-world problems.
From joining you will have ownership on a diverse set of projects that have a direct impact on trading performance. You will work closely with highly skilled colleagues who share your enthusiasm and deep knowledge of C++, Linux and network protocols, and share your hunger to learn more.
What We Are Looking For
- An experienced Modern C++ developer (C++17/20), with minimum 5 years experience and proficiency with C++ templates.
- A developer, who designs code to push every performance boundary.
- Excellent written and verbal communication skills.
- Ability to solve new and unfamiliar problems quickly and creatively.
Ideal Experience Would Include
- Knowledge of multiple exchanges.
- Ultra low latency design.
- Template metaprogramming.
- Network programming experience.
- Python.
What We Offer
- A great engineering environment whereby technology is key to our success and a C++20 code base.
- Great friendly, informal and highly rewarding culture.
- Fast growing global firm with plenty of opportunities where you will have significant impact.
About Us
Our approach to trading is scientific and technology driven. Tight integration between trading and software development, relying on cutting edge infrastructure is core to our success. Our teams of C++, Python, C# and FPGA developers are responsible for our in-house applications, ranging from the world's lowest latency execution systems, through web-based user interfaces, to tools to interrogate multi-terabyte data sets.
YOUR RESPONSIBILITIES
- Development and unit testing of web applications including back-end (microservices), maintenance & level 3 support of the same
- Assist Project Managers, Business Analysts, and Tech Lead in project planning (provide estimates, risk analysis, requirements analysis, technical options)
- Software Architecture
- Involvement in full life cycle of projects (including requirement analysis and system design, development and support if required)
- Support and work collaboratively with teams across areas of design, development, quality assurance and operations
- Commit your knowledge and experience into team success
- A small amount of travel (when needed) to work with other offices
- Attend meetings to discuss and demonstrate solutions at both technical and business level
REQUIRED SKILLS AND EXPERIENCE
- 5+ years web application development experience
- 3+ years developing with Python
- 3+ years developing with C# and .NET Framework 4.x
- Experience with ASP.NET MVC, ASP.NET WebAPI 2, LINQ, and WCF
- Dependency Injection and other common ASP.NET MVC design patterns
- Experience with API design and development using REST
- Experience with performance optimization
- Experience integrating security best practices into the SDLC
- Experience with object-oriented programming (OOP) and OOP patterns
- Experience with Git
- 1+ years of Agile development experience
- Experience manipulating and working with data in a variety of forms: csv, xml, json, structured and unstructured
- Experience with SQL database schema design and querying. Microsoft SQL Server and PostGreSQL are used and preferred.
DESIRABLE SKILLS AND EXPERIENCE
- Knowledge of JIRA, Bamboo, Confluence, or BitBucket is a plus.
- Experience with a JavaScript MVVM library such as Web Components, knockout.js, Angular, React, etc. is a plus (Web Components and knockout.js are used and preferred)
- Experience with HTML5/CSS3/JavaScript/ and AJAX is a plus
- SPA (Single Page Application) design and implementation is a plus
- Experience with any ORM such as Entity Framework or NHibernate is a plus (NHibernate is preferred)
- Experience with TypeScript is a plus
- Experience with MS Build is a plus
- Experience with CI/CD is a plus
- Experience with Object Mapping Frameworks (AutoMapper, etc) is a plus
- Understanding of OOD, DDD and TDD is a plus
- AWS-based development is a plus
- Knowledge of Flask is a plus.
PERSONAL SKILLS
- Clever personality
- Strong spirit skills set: conflict resistant, self -motivated, result-oriented, responsible, honest, “open”, courageous











