Backend Engineer - Python at Leena AI · Remote only · 3 - 8 years · Raised funding · Remote only · Posted 28 Oct 2021

Responsibilities:
- Design and code efficient, scalable systems that can accept feedback from multiple hundred thousand employees and generate insights
- Design efficient and scalable event driven systems to process complex machine learning pipeline
- Experiment with data to come up with unique insights and that can benefit our clients
- Identify libraries and technologies worth experimentation
- Participate in brainstorming sessions to bring more value to our clients
- Investigate performance issues / scalability bottlenecks, existing queries and/or write new queries with performance optimization in mind
- Develop RESTful APIs that can be used by frontend to show insights
- Debug and fix production level bugs as and when they crop up
- Support ad hoc data analytics upon requests by clients, and believe us nothing creates a better DB understanding than handling ad hoc data requests
Requirements:
- 3+ years of experience in architecture and developing high performance web applications
- Experience with systems ingesting/processing high amounts of data is a plus
- In-depth understanding of the entire web development process (design, development, and deployment)
- Experience with SQL and NoSQL database
- Working knowledge of RESTful API paradigms
- Experienced in microservices architecture
- Solid engineering principles and a clear understanding of data structures and algorithms
- Passion for products, empathy for users, and aspiration to make a big impact

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Experience and Required Skill Sets:
1 Solid experience in software design and development using Microsoft ASP.NET framework, C#, Visual Studio, and in writing clean, readable, and easily maintainable code
2 5+ years of experience in WCF, WPF, VB.NET, SQL Server, JQuery, Angular 10 and above.
3 5+ years of experience in developing highly scalable REST/Web APIs
4 5+ years of experience in developing highly efficient SQL/NoSQL Queries
5 5+ years of experience in Relational and Document databases
6 Strong understanding of object-oriented programming and possess strong fundamental design principles for building a scalable application.
7 Experience in using the MVC framework, working knowledge in APIs, and Service Oriented Architecture
8 Strong understanding of object-oriented programming and possess strong fundamental design principles for building a scalable application.
9 Experience in Angular version 10 and above is required
10 Expert in SQL programming & Database Design (Stored procedure, Function, Trigger, Constraints, Replication)
11 Strong ability in HTML and JavaScript (AJAX, DOM)
12 Development experience with data integration technologies including REST, SOAP, JSON, XML
13 Expertise in programming and usage of any unit testing framework. Expertise in integration testing and continuous integration.
14 Experience working in a DevOps environment will be an added advantage.
Responsibilities:
• Ability to create complex, enterprise-transforming applications that meet and exceed client expectations.
• Responsible for the bottom line. Strong project management abilities. Ability to encourage the team to stick to timelines.
• Follow best-in-class coding practices and review the solutions vis-à-vis the requirements and technical specifications.
• Should demonstrate strong client interfacing capabilities like emails and calls with clients in the US/UK
Technology Stack: Next.js, Express.js, PostgresSQL, GCP
Location: Ahmedabad
About Medflix - empowering healthcare professionals for better care
Medflix (www.medflix.app/app) is a platform where healthcare professionals (doctors, medical students and more) stay updated through live talks, Q&As, support material and more. Through the platform we believe that these professionals can be empowered to deliver better care to patients (like our families) throughout the globe.
In its current (and evolving) form, it is a live learning and engagement platform seeing tremendous week-on-week growth through stellar speakers and a very active early community. The product is in the growth stages and you will be playing a key role in steering the tech to create a scalable and lovable product experience.
We are backed by startup, VC and PE veterans including Kunal Shah (CEO, Cred), Raghunandan G (Zolve, ex-TFS), Avnish Mehra (Everstone) and more.
Medflix is a platform by PlexusMD (www.plexusmd.com/app), a network trusted and loved (4.4 stars on Playstore and 4.4 on Appstore) by more than 3 lakh doctors in India and working closely with leading healthcare providers and companies like AIIMS, Jaslok, Hinduja, Apollo, HCG, Elsevier, Association of Physicians of India, Indian Association of Cardio-thoracic surgeons, Society of Nuclear Medicine, Govt of Gujarat (HFW Dept), Govt of Haryana (SIFHW), McKinsey and company, Takeda, Mankind and others.
About the Role
Tech stack (expertise in all is not required, experience in some will be sufficient):
- React / Next.js (required, at least 1 year of experience)
- Express.js (required, at least 1 year of experience)
- Familiarity with cloud services (gcp / azure / aws)
- PostgreSQL (or expertise in any relational database)
- Redis
- Docker/Kubernetes deployment (good to have)
For this role we are looking for engineers with an entrepreneurial mindset, an understanding of how startups operate and who like to get their hands dirty when unknown things come their way. You will work closely with the product team to prioritise and ship features with a predictable cadence.
As this role is full-stack, you need to have a good understanding of frontend design and be obsessed with responsiveness and pixel-perfect behaviour. On the backend side, an OCD for efficiency and optimisation is a required personality trait.
Demonstrated history of solving hard problems (frontend/backend or both) is a great-to- have.
Benefits and growth
While we ensure competitive compensation (plus ESOP options for deserving candidates), at Medflix, you will also have a strong say in how final solutions look. You will get the opportunity to learn to steer an accelerating rocket ship.
College credentials, background or years of experience are no bar for growth inside the company for enthusiasts who believe in our mission and demonstrate that passion to create a product that healthcare workers love.
About VerbaFlo.ai
VerbaFlo.ai is a fast-growing AI SaaS startup revolutionizing how businesses leverage AI-powered solutions. As a part of our dynamic team, you’ll work alongside industry leaders and visionaries to drive innovation and execution across multiple functions.
Role Overview
We are looking for a Senior Backend Engineer to design and develop user-friendly, scalable, and high-performance web applications. This role requires deep expertise in backend technologies, attention to detail, and the ability to collaborate with cross-functional teams.
Responsibilities
- Design, develop, and maintain scalable backend systems, APIs, and data pipelines.
- Collaborate closely with frontend engineers, product managers, and AI teams to deliver cohesive features and seamless user experiences.
- Ensure the reliability, security, and performance of backend systems.
- Write clean, maintainable, and efficient code using modern backend practices.
- Implement automated testing, CI/CD workflows, and infrastructure as code (where applicable).
- Own the end-to-end lifecycle of backend features, from architecture to deployment.
- Monitor production systems and resolve performance and scalability issues.
- Contribute to architectural decisions and help evolve our engineering best practices.
Requirements
- 4–6 years of experience in backend development in startups, preferably in SaaS or AI-driven products.
- Proficiency in Node.js, Python, or Go
- Deep understanding of RESTful API design.
- Strong experience with databases: PostgreSQL, MongoDB, ElasticSearch.
- Exposure to message queues, job schedulers, or event-driven architectures (e.g., SQS, Celery, etc).
- Familiarity with cloud platforms like AWS, GCP, or Azure and containerization tools (Docker, Kubernetes).
- Experience with Git, CI/CD tools, and writing unit/integration tests.
- Strong problem-solving skills and a mindset geared toward performance and security.
- Excellent communication and collaboration abilities.
Why Join Us?
- Work directly with top leadership in a high-impact role.
- Be part of an innovative and fast-growing AI startup.
- Opportunity to take ownership of key projects and drive efficiency.
- A collaborative, ambitious, and fast-paced work environment.
- Perks & Benefits: gym membership benefit, workation policy, and company-sponsored lunch.
If you’re looking for an exciting role that combines strategy, execution, and leadership exposure, we’d love to hear from you!
About the Role
We are looking for an ambitious Software Engineering Intern to join our engineering team. You will write production-ready code, collaborate directly with senior engineers, and build features used by real users from day one. High performers will be considered for a full-time Pre-Placement Offer (PPO) at the end of the internship.
Key Responsibilities
- Build and maintain clean, scalable frontend or backend features under senior mentorship.
- Write modular, testable code and assist in unit testing and bug fixing.
- Collaborate with product managers, designers, and peers in an agile, fast-paced environment.
- Participate in code reviews, tech discussions, and sprint planning.
What We Are Looking For
- Strong grasp of data structures, algorithms, and core object-oriented/functional programming principles.
- Hands-on experience with at least one programming language (e.g., JavaScript/TypeScript, Python, Java, or Go) through personal projects, coursework, or open-source contributions.
- Working knowledge of REST APIs and relational or NoSQL databases (e.g., PostgreSQL, MongoDB).
- Basic familiarity with Git and version control workflows.
- Strong problem-solving mindset, fast learning ability, and genuine curiosity about software engineering.
Senior Software Engineer – Backend
Company: House of EdTech (Goenka Kachave LLP)
Location: Bangalore, Hybrid
Job Type: Full-Time
Experience: 5+ Years
About the Role
House of EdTech is looking for a Senior Software Engineer – Backend to design, develop, and scale high-performance backend services and APIs supporting products used by millions of learners.
You’ll work closely with Product, Frontend, Data, and Engineering teams while taking end-to-end ownership of backend features and contributing to system architecture and technical decisions.
What You'll Do
- Design and develop scalable backend services and REST APIs.
- Build reliable systems capable of handling high traffic and large data volumes.
- Own backend features from design and development through deployment and monitoring.
- Work with microservices, databases, and distributed systems.
- Identify and solve performance, scalability, reliability, and security challenges.
- Participate in system design and architecture discussions.
- Conduct code reviews and contribute to engineering best practices.
- Mentor junior and mid-level engineers.
- Monitor production systems and troubleshoot incidents.
What We're Looking For
- 5+ years of professional backend development experience.
- Strong hands-on experience with Java, Python, Scala, C++, or a similar language.
- Experience building and operating large-scale distributed systems.
- Strong understanding of REST APIs, microservices, and databases.
- Experience with cloud/infrastructure technologies such as GCP, Docker, or Kubernetes.
- Strong software engineering fundamentals, including security, reliability, testing, and code quality.
- Experience with system design, architecture, and technical decision-making.
- Strong communication and cross-functional collaboration skills.
- Experience mentoring engineers is a plus.
Why Join House of EdTech?
- Work on products impacting millions of learners.
- Solve challenging backend and scalability problems.
- Take significant ownership of architecture and engineering decisions.
- Opportunity to grow into technical leadership and architectural ownership.
- Work in a fast-growing technology environment.
The recruiter has not been active on this job recently. You may apply but please expect a delayed response.
About the Role
Unico Connect is an AI-first technology partner that builds custom mobile, web, and AI products for clients across multiple geographies. We are hiring a Backend Engineer for a dedicated client engagement building an AI-powered application builder platform.
The backend is the operational core of the product: it manages user projects and sessions, coordinates long-running AI agent workloads, maintains project state, and serves as the integration layer between the frontend, the AI system, and the underlying infrastructure.
The mandatory requirement is hands-on production experience shipping Node.js services, with end-to-end ownership of API design, data modelling, and at least one production system involving background job processing or event-driven patterns.
Responsibilities
API and service development: Design and build REST APIs in Node.js with TypeScript. Cover authentication, session management, input validation, structured error handling, streaming responses (SSE, WebSockets), and rate limiting. Maintain clean API contracts that the frontend and AI system can rely on.
Database design and management: Own PostgreSQL schema design for product domains including user accounts, projects, file trees, session state, and generated artefacts. Write efficient queries, manage migrations, and optimise for read patterns that serve a real-time editor experience.
Caching strategy: Implement and maintain caching with Redis for session data, project state, and frequently read configuration. Design cache invalidation logic that keeps the editor experience consistent without stale reads.
Queue and background job management: Implement and operate background job infrastructure using BullMQ or equivalent. AI agent runs are long-running and stateful; handle retries, failure states, priority queues, and concurrency limits.
AI system integration: Build the integration layer between the backend and the AI agent system. Manage job dispatch, result handling, streaming output to the frontend, and error propagation.
Multi-tenancy and access control: Implement tenant data isolation, RBAC, and resource ownership enforcement across all API surfaces.
Observability and reliability: Instrument services with structured logging, metrics, and tracing. Write defensive code with sensible timeouts, fallback behaviour, and circuit breaking on external dependencies.
Testing and code quality: Write unit and integration tests for the services you ship. Review the work of peers and contribute to shared engineering conventions.
Requirements
• Hands-on production Node.js experience (mandatory) — must have personally shipped at least one feature area end to end in a production Node.js service, owning API design, data modelling, and testing.
• 3 to 5 years of professional backend engineering experience. Candidates with slightly less time but strong demonstrated ownership are welcome to apply.
• Strong Node.js and TypeScript. Production experience with Express, NestJS, or Fastify. Solid with async patterns, streaming, error handling, and building services that run reliably under sustained load.
• PostgreSQL depth. Schema design, query writing, indexing, and migrations on at least one production system.
• Redis and caching. Production experience using Redis for caching and session management. Understands cache invalidation trade-offs.
• Queue and background job systems. Hands-on with BullMQ, RabbitMQ, SQS, or equivalent. Experience managing retries, dead-letter queues, job priority, and concurrency control.
• AWS working knowledge. Comfortable with EC2, S3, RDS, SQS, and IAM. Familiar with Docker and basic deployment and environment management.
• Strong written and spoken English. Able to communicate clearly with engineers across disciplines and write precise technical documentation.
Nice to Have
Experience integrating with AI or LLM services (streaming responses, structured outputs, retry patterns); WebSocket or SSE implementation for real-time features; multi-tenant SaaS product experience; GraphQL; OpenTelemetry instrumentation; prior work on developer tools or editor-style products.
Job Overview
Architect and build scalable, high-performance backend systems while working on mission-critical platforms that process real-time market data and portfolio analytics. The role also involves leveraging Generative AI capabilities to enhance data intelligence, automation, and user-facing features, while ensuring regulatory compliance and secure financial transactions.
Key Responsibilities
- Design, develop, and maintain scalable backend services and APIs using NodeJS and Python
- Build event-driven architectures using RabbitMQ and Kafka for real-time data processing
- Develop and manage data pipelines integrating PostgreSQL and BigQuery for analytics and warehousing
- Integrate and deploy Generative AI models (LLMs, embeddings, AI APIs) into backend systems for automation, insights, and intelligent workflows
- Design AI-powered features such as recommendation systems, document processing, or conversational interfaces
- Ensure system reliability, security, and low-latency performance for mission-critical systems
- Lead technical design discussions, conduct code reviews, and mentor junior engineers
- Optimize database queries, implement caching strategies, and improve overall system performance
- Collaborate with cross-functional teams to deliver end-to-end product features
- Implement monitoring, logging, and observability solutions
Required Skills and Qualifications
- 2+ years of professional backend development experience
- Strong expertise in NodeJS and Python for production-grade applications
- Proven experience building RESTful APIs and microservices architectures
- Experience working with Generative AI frameworks/APIs (OpenAI, LangChain, vector databases, prompt engineering)
- Understanding of integrating LLMs into production systems (RAG, embeddings, fine-tuning basics)
- Strong proficiency in PostgreSQL, including query optimization and schema design
- Hands-on experience with RabbitMQ and Kafka
- Experience with BigQuery or similar data warehousing solutions
- Solid understanding of distributed systems, scalability patterns, and high-traffic applications
- Strong knowledge of authentication, authorization, and security best practices
- Experience with Git, CI/CD pipelines, and modern development workflows
- Excellent problem-solving and debugging skills
- Exposure to fintech or financial services, cloud platforms (GCP/AWS/Azure), Docker/Kubernetes, caching tools (Redis/Memcached), and regulatory requirements (KYC, compliance, data privacy) is a plus
Apply directly at: https://wohlig.keka.com/careers/jobdetails/136351
Our Story
At The Alter Office, we build what comes next. We operate as an internal innovation lab, creating stealth products, new business bets, and high-leverage systems designed to unlock disproportionate value for us and our partner company ITW Consulting.
Our work is not centered around being a conventional service partner. Instead, we focus on building products and platforms that solve complex, strategic problems and create long-term advantage. Where needed, we have stepped in on critical opportunities beyond the usual scope, especially when speed, product thinking, and execution depth mattered most.
About the Role
We are building a holistic AdTech platform that delivers premium value to both advertisers and publishers, and the backend is where that entire ecosystem actually runs - the ad marketplace, campaign creation, ad-serving decisioning, analytics collection, attribution, and ROAS measurement.
Concretely, that means large-scale architecture: the ad-serving systems that make real-time decisioning calls at volume, the scalable data platforms that ingest and process billions of events a day, the analytics platforms that turn that data into attribution and ROAS numbers advertisers and publishers trust, and the autonomous AI agents we're building to automate campaign optimization and decisioning across the platform.
We are looking for someone who is eager to learn, enjoys solving technical problems, and wants to grow beyond simply implementing tasks. You'll have opportunities to understand how backend systems connect to the product and gradually take ownership of larger parts of the platform.
Key Responsibilities
- Build and maintain backend APIs and services for our ad marketplace, campaign management, and analytics platforms.
- Work with senior engineers to design and implement scalable backend solutions.
- Develop RESTful APIs and asynchronous backend workflows.
- Work with SQL databases such as MySQL and PostgreSQL and NoSQL technologies such as MongoDB and Redis.
- Implement data models, database queries, caching, and basic performance optimizations.
- Contribute to backend infrastructure supporting analytics, attribution, and AI-powered platform features.
- Collaborate with product, frontend, backend, and DevOps teams to deliver end-to-end features.
- Implement authentication, authorization, and basic security practices under the guidance of senior engineers.
- Write clean, maintainable, documented, and tested code.
- Use Git and participate in code reviews and team development practices.
- Learn and contribute to deploying backend services on cloud platforms such as AWS, GCP, or Azure.
- Work with Docker for containerizing backend services.
- Contribute to CI/CD pipelines and development workflows.
- Help monitor, debug, and troubleshoot backend services in development and production environments.
- Explore event-driven and distributed architectures using technologies such as message brokers, WebSockets, or GraphQL where appropriate.
Requirements
- 1–2 years of professional backend engineering experience, including relevant internship or project experience.
- Proficiency in at least one backend language, with the ability and willingness to adapt to other languages such as Node.js/JavaScript, Go, Python, and Java.
- Good understanding of RESTful API design and backend fundamentals.
- Good understanding of asynchronous programming and how backend services communicate.
- Familiarity with relational databases such as MySQL or PostgreSQL.
- Familiarity with at least one NoSQL database such as MongoDB or Redis is a plus.
- Good understanding of data modeling and writing SQL queries.
- Familiarity with Git and software development workflows.
- Good understanding of Docker and containerized applications.
- Exposure to cloud platforms such as AWS, GCP, or Azure is a plus.
- Understanding of basic backend security concepts such as authentication, authorization, and secure API practices.
- Strong problem-solving and debugging skills.
- Good communication and willingness to collaborate with other engineers and product teams.
- Strong learning mindset and willingness to work with unfamiliar technologies.
- Comfortable working in a fast-paced environment with evolving priorities.
5 steps, and we tell you where you stand at each one.
Online Assessment : Evaluate coding skills, backend fundamentals, SQL, problem-solving, and technical understanding.
Technical Interview 1 : Discuss previous projects, backend experience, APIs, databases, system design, and production experience.
Take-Home Assessment : A practical backend assignment to evaluate code quality, architecture, scalability, testing, and ability to build a production-ready solution.
Technical Interview 2 : Deep dive into the take-home assignment, system design, technical decisions, scalability, debugging, cloud, and architecture.
HR Interview : Discuss communication, ownership, culture fit, career goals, compensation, availability, and overall expectations.
Strong Backend Software Engineer Profile with strong Core Java expertise
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Mandatory (Experience 1): Must have 2+ years of hands-on backend software engineering experience.
3
Mandatory (Experience 2): Must be able to design and implement moderately complex features with minimal supervision, and contribute to system design and architecture discussions.
4
Mandatory (Experience 3): Must be comfortable owning business-critical production components — maintaining connectors, handling customer escalations, security fixes, bug fixes, and building new features end-to-end.
5
Mandatory (Tech skill 1): Must have strong, current Core Java depth with solid, clear coding fundamentals — Java is the primary skill for this role. Deep hands-on core engineering strength matters more than framework knowledge.
6
Mandatory (Tech skill 2): Must have strong core backend engineering fundamentals and experience with scalable systems (connectors handle millions of events/data points daily across customers).
7
Mandatory (AI Fluency): Must have demonstrated, hands-on use of AI coding assistants (Claude, GitHub Copilot, Cursor, etc.) as a core part of the daily workflow — scaffolding, writing tests, reviewing code, and debugging — with the ability to write precise, effective prompts for production-quality output, decompose tasks so AI assistance is effective, and critically evaluate AI-generated code for correctness, security, and standards before merging.
8
Mandatory (Database): Hands-on database / JDBC integration experience in a production environment.
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Mandatory (Company): Must come from a product company background (B2B SaaS or B2C both acceptable).
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Mandatory (Note1): This is a 3-month contract role. Candidate must be comfortable with the contract engagement and able to join immediately (urgent — onboarding within ~a week)
Role Description
Software Engineer is a full-time role based in Hyderabad with Onsite work arrangement. This role involves designing, developing, and maintaining back-end services and APIs, ensuring high performance, scalability, and security across platforms. The engineer will participate in architecture discussions, code reviews, and technical decision-making, collaborating closely with product owners, QA, and cross-functional teams. Daily responsibilities include writing clean, maintainable code, troubleshooting complex issues, improving system performance, and contributing to best practices, documentation, and engineering standards. The role also includes mentoring less experienced engineers and supporting continuous improvement in development processes and tooling.
Key Requirements/Skills
4-7 years of overall experience in software development with strong expertise in building scalable web & mobile applications.
- Strong technical decision-making ability, including architecture design, technology selection and implementation of best practices.
- Front-end expertise: Strong experience in React, JavaScript, TypeScript, NextJS and building responsive and user-friendly UI/UX.
- Back-end development: Hands-on experience with Node.js, Express JS, Nest JS, RESTful APIs, API design, and server-side architecture.
- Databases : Good Hands on Exprience in both SQL(PostgreSQL Preferred) & No SQL Databases
- Gen AI Expertise: Experience in building RAG & LLM Systems, implementing AI/ML models and integrating AI-based solutions to solve business problems. Expereince with Langchain, langgraph and Vector DBs, Voice AI(STT, TTS) Models and experience in using Open AI Tools (Calude, Cursor, etc.)
- Cloud & DevOps exposure: Experience with AWS/Azure, understanding of CI/CD pipelines, and cloud-based deployments.
- Code quality & best practices: Experience in code reviews, Git version control, and ensuring maintainable and secure code.
- Team leadership: Ability to mentor developers, guide technical discussions, and collaborate across teams.
- Strong communication skills to effectively interact with technical and non-technical stakeholders.
- Experience working in high-compliance environments such as healthcare systems is a plus.
- Certifications in AWS & Other skills and technologies will be an added advantage.
Educational Qualification
- B.Tech / M.Tech in CSE/IT/AI&ML only from a recognized university/college.















