
Python Developer (Performance Optimization Focus)
Experience: 3–5 Years
Location: Remote (India-based candidates only)
Employment Type: Full-time
Role Overview
We are seeking a Python Developer with a strong focus on performance optimization and system efficiency. In this role, you will identify bottlenecks, enhance system performance, and contribute to building scalable, high-performance applications in a Linux-based environment.
Key Responsibilities
- Analyze and troubleshoot performance bottlenecks in applications and systems
- Optimize code, database queries, and architecture for scalability and speed
- Design, develop, test, and maintain robust Python applications
- Work with large datasets and improve data processing efficiency
- Collaborate with cross-functional teams to improve system reliability and performance
- Monitor system performance and implement proactive improvements
- Write clean, maintainable, and efficient code following best practices
Required Skills & Qualifications
- 3–5 years of hands-on experience in Python development
- Strong expertise in performance tuning and optimization techniques
- Experience with debugging and profiling tools
- Solid understanding of data structures and algorithms
- Experience with REST APIs and backend development
- Strong analytical and problem-solving skills
Linux & System Knowledge (Must-Have)
- Comfortable working in Linux/Unix environments
- Command-line proficiency, including:
- File editing (vi, nano)
- File permissions (chmod, chown)
- File downloads (wget, curl)
- Basic file and directory operations
Basic Python Knowledge (Interview Scope)
- Writing simple scripts and reusable functions
- String manipulation and data handling
- Example task: Count words in a file/string efficiently
Good to Have
- Familiarity with AI/ML concepts or tools
- Experience optimizing data-intensive or distributed systems
- Exposure to cloud platforms (AWS, GCP, Azure)
Why Join Us
- Work on performance-critical systems with real-world impact
- Fully remote work environment
- Opportunity to work with modern, scalable technologies
- Collaborative, growth-focused team culture

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Mandatory Skills: C++, STL, Multithreading, Socket Programming, LINUX, Memory Management, System Design, Design Patterns, Design & Deployment.
● 4+ years of experience in C++ application development.
● Hands-on experience with C++11 or above.
● Strong knowledge of object-oriented programming and software design.
● Deep understanding of STL, multi-threading, socket programming, and datastructures.
● Solid grasp of Linux development and debugging techniques.
● Proficient in using GCC, GDB, and Makefile.
● Familiarity with Valgrind and similar analysis tools.
● Experience with version control tools like Git.
● Experience writing and maintaining automated tests.
● Experience in capital markets/trading domain is a plus.
About Us:
REConnect Energy’s GRIDConnect platform helps integrate and manage energy generation and consumption for 1000s of renewable energy assets and grid operators. We are currently serving customers across India, Bhutan and the Middle East with expansion planned in US and European markets.
We are headquartered in Central Bangalore with a team of 150+ and growing. You will join the Bangalore based Engineering team as a senior member and work at the intersection of Energy, Weather & Climate Sciences and AI.
Responsibilities:
● Engineering - Take complete ownership of engineering stacks. Define and maintain software systems architecture for high availability 24x7 systems.
● Leadership - Lead a team of engineers and analysts managing engineering development as well as round the clock service delivery. Provide mentorship and technical guidance to team members and contribute towards their professional growth. Manage weekly and monthly reviews with team members and senior management.
● Product Development - Contribute towards new product development through engineering solutions to product requirements. Interact with cross-functional teams to bring forward a technology perspective.
● Operations - Manage delivery of critical services to power utilities with expectations of zero downtime. Take ownership for uninterrupted product uptime.
Requirements:
● Bachelor's or Master’s degree in Computer Science, Software Engineering, Electrical Engineering or equivalent
● Proficient in python programming along with Frameworks like Django/Fast Api/Flask and Java frameworks like Spring, Hibernate, SpringBoot, etc
● Debug and resolve technical issues that arise during the development or after deployment at various stages.
● Experience in databases including MySQL and NoSQL
● Experience in designing, developing and maintaining high availability systems.
● Experience in MVC pattern, Tomcat, Git, and Jira.
● Experience working with AWS cloud platform.
● 4-5 years of experience building highly available systems
● 2-3 years experience leading a team of engineers and analysts
● Strong analytical and data driven approach to problem solving
Required Skills:
- 4+ years of experience designing, developing, and implementing enterprise-level, n-tier, software solutions.
- Proficiency with Microsoft C# is a must.
- In-depth experience with .NET framework and .NET Core.
- Knowledge of OOP, server technologies, and SOA is a must. 3+ Years Micro-service experience .
- Relevant experience with database design and SQL (Postgres is preferred).
- Experience with ORM tooling.
- Experience delivering software that is correct, stable, and security compliant.
- Basic understanding of common cloud platform. (Good to have)
- Financial services experience is strongly preferred.
- Thorough understanding of XML/JSON and related technologies.
- Thorough understanding of unit, integration, and performance testing for APIs.
- Entrepreneurial spirit. You are self-directed, innovative, and biased towards action. You love to build new things and thrive in fast-paced environments.
- Excellent communication and interpersonal skills, with an emphasis on strong writing and analytical problem-solving.
Requirements:
• Should be a go-getter, ready to shoulder more responsibilities, and shows enthusiasm and interest in work.
• Excellent core Python skills including threading, dictionary, OOPS Concept, Data structure, and Web service.
• Should have work experience on the following stacks/libraries: Flask
• Familiarity with some ORM (Object Relational Mapper) libraries
• Able to integrate multiple data sources and databases into one system
• Understanding of the threading limitations of Python, and multi-process architecture Familiarity with event-driven programming in Python
• Basic understanding of front-end technologies, such as Angular, JavaScript, HTML5 and CSS3
• Writing reusable, testable, and efficient code
• Design and implementation of low-latency, high-availability, and performant applications
• Understanding of accessibility and security compliance
• Experience in both RDBMS(MySQL), NoSQL databases (MongoDB, HDFS, HIVE etc) or in-memory caching technologies such as ehcache etc is preferable.
Main Responsibilities:
- Should be accountable for the deliverables of assigned MS Dynamics CRM functionality
- Should be able to work with Business groups, Architects to understand the functional expectations, produce technical solutions and documentation
- Should be able to conceptualize and design solution, independently customize, develop/code using MS Dynamics 365 and technologies such as C#, .Net, Integration technologies including SQL Server & Kingsway Soft
- Should be able to own technical impediments, liaise with various groups and troubleshoot /resolve
- Participate in the Scrum process activities including Sprint Planning and Estimating sessions, Daily Stand-ups, Sprint Demos and Sprint retrospectives.
Basic Qualifications:
- 4+ years’ strong experience in MS dynamics 365 implementations & support and extensive experience with C#, .NET, JavaScript, Power apps
- Strong experience in Web API development and plug in’s
- Strong experience in integration technologies including SQL Server & KingswaySoft to connect internal & third-party systems
- Experience with Power BI, SQL Server Integration Services, ASP.net, client-side JavaScript frameworks, Xamarin.
Preferred Qualifications:
- Strong experience using Microsoft Azure Dev Ops, MS Visual Studio and MS SQL server
- 5 years experience with the Django framework
- Experience with building APIs (REST or GraphQL)
- Strong Troubleshooting and debugging skills
- React.js knowledge would be an added bonus
- Understanding on how to use a database like Postgres (prefered choice), SQLite, MongoDB, MySQL.
- Sound knowledge of object-oriented design and analysis.
- A strong passion for writing simple, clean and efficient code.
- Proficient understanding of code versioning tools Git.
Experience:
- Min 5 year experience
- Startup experience is a must.
Location:
- Remote developer
Timings:
- 40 hours a week but with 4 hours a day overlapping with client timezone. Typically clients are in California PST Timezone.
Position:
- Full time/Direct
- We have great benefits such as PF, medical insurance, 12 annual company holidays, 12 PTO leaves per year, annual increments, Diwali bonus, spot bonuses and other incentives etc.
- We dont believe in locking in people with large notice periods. You will stay here because you love the company. We have only a 15 days notice period.
Esper is looking for a software engineer to transform the customer experience
for developers and engineering teams using the platform of services to deploy
and build out their device fleets. You and your team will own services that will
enable customers to develop and customize their development process, along
with easing their use of Continuous Integration techniques for their software. We
need a leader that is experienced in delivering scalable multi-region fault tolerant
systems, is passionate about the developer tools space, is excited to have
software developers as their customers, and is obsessed about creating
compelling customer experiences.
In this role you will contribute to a critical and highly-visible function within the
Esper business. You will be given the opportunity to autonomously deliver the
technical direction of the service, and the feature roadmap. You will work with
extraordinary talent and have the opportunity to hire and shape the team to best
execute on the product. If you’re excited to have a large impact on Esper and the
device industry, you’ll find this role to be engaging, challenging, and full of
opportunities to learn and grow.
Key Responsibilities
Help drive business decisions with your technical input
Design, implement, test, deploy and maintain innovative software
solutions to transform service performance, durability, cost, and
security.
Use software engineering best practices to ensure a high standard of
quality for all of the team deliverables
Write high quality distributed system software
Work in an agile, startup-like development environment, where you are always working on the most important stuff.
Basic Qualifications
2 -4 years of professional software development experience
You’ve designed, built, scaled and maintained production services, and know how to compose a service oriented architecture.
Degree or foreign equivalent in Computer Science, Engineering, Mathematics, or a related field.
You write high quality, well tested code to meet the needs of your customers
You are comfortable with programming languages like Go, Python, Java
You’ve good understanding of databases system like Postgres. Extensive Knowledge about Postgres is a big plus.
You’ve have worked with Docker, Kubernetes and have fundamental understanding of distributed systems like Kafka, Elasticsearch
Preferred Qualifications
Experience taking a lead role developing complex software systems that have successfully been delivered to customers.
Experience in communicating with users, other technical teams and senior management to collect requirements, describe software product features, technical designs and product strategy.
Knowledge of professional software engineering practices & best practices for full software development life cycle, including coding standards, code reviews, source control management, continuous deployments, testing and operations
Demonstrated ability to mentor junior software engineers in all aspects of their engineering skill-sets.
What we think makes us special
Esper is a fast-growing, well-funded company where everyone matters and you can see your impact daily. We trust our teammates and offer intense ownership and therefore accountability. We’re inventing the future and building something special. The team really enjoys what we do and cares about your input. We don’t hire just to fill a spot, we want you to make a difference.
As you help us build this special company, Esper will take care of you. We offer flexible vacation, regular hack-days, competitive pay and benefits, and room for advancement. We hire capable veterans so we avoid the drama and trust in each other’s work. Our worldwide footprint mixes different cultures for a unique experience. We also like to have fun because we play just as hard as we work.
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:
- 2+ 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.
- 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 Requests, sklearn, Selenium
- Hands on experience in Machine learning implementations
- Experience with Cloud infrastructure (e.g. AWS) and relevant microservices
- Good Humor
Requirements :
- 3+ years of professional software development experience
- 2+ years of object-oriented Java/J2EE hands-on development
- Spring (MVC, IOP/DI, REST, Security) & Hibernate/Spring
- REST web services
- Anyone of the messaging solutions like Kafka, RabbitMQ
Desirables :
- SQL, No SQL concepts
- Experience of Redis or/and Mongo DB
- Agile methodology
- Experience leading or working with cross geography teams
- Unix, shell scripting & Build Systems
Bonus :
- Microservice design and development experience
- Android application development experience
- Experience in performance optimization is an added advantage
- Full SDLC experience (requirements gathering, architecture, development, QA, etc.)
Responsibilities :
- You will be working with the Supply Chain Management team building a leading eCommerce platform for Asian markets
- Order Promising system, promising the order delivery promise date to customer by applying the constraints on current resource availability across different steps in the supply chain. This system needs to scale for thousands of requests per minute with few million seconds of response time
- Warehouse and Inventory Management system, this system needs to scale to processing huge number of orders across different warehouse.
- Transportation and Logistics Management, involves planning and delivery of huge number orders to end customer. This system has the workflows to manage first mile, line haul and last mile delivery to customer
- Inventory Planning, helps in tracking different selling behaviours of the items and triggers / helps planners to replenish, promote, markdown or place inventory at right place to cut down the on hand inventory requirements
- You will be actively involved during the entire technology development lifecycle. Responsibilities will include all aspects from design, coding review, coding, unit testing, end user feedback cycle changes and manging and scaling the system in production.
- Primary role in leading software development teams
- The customized solutions that you will be architecting and developing will also require knowledge and experience with spring / Hibernate, SOAP / REST, microservices and SQL.
- Ability to learn new technologies quickly and willingness to read and digest large existing source code and take ownership on complex component or subsystem to drive improvements and re-architecture
- Work with a team of amazing developers and designers involved in the design and development of global platforms
- Invent and prototype new features, build, test and ship them to customers as SaaS, cloud-based or hosted product platforms
- Drive the implementation of new technologies that improve our ability to build great customers products.
- Participate in a fun, open learning environment with great benefits and smart talented folks that represent among the best globally.
Qualification :
- A Bachelors degree in Computer Science (or equivalent experience)
- M-Tech or advanced degree a plus
- Hackathon participation, hands-on programming capability, competitive programming is a plus





