Senior Backend Developer

Job Responsibilities :

- Work closely with product managers and other cross-functional teams to help define, scope, and deliver world-class products and high-quality features addressing key user needs.

- Translate requirements into system architecture and implement code while considering performance issues of dealing with billions of rows of data and serving millions of API requests every hour.

- Ability to take full ownership of the software development lifecycle from requirement to release.

-Writing and maintaining clear technical documentation enabling other engineers to step in and deliver efficiently.

- Embrace design and code reviews to deliver quality code.

- Play a key role in taking Trendlyne to the next level as a world-class engineering team

- Develop and iterate on best practices for the development team, ensuring adherence through code reviews.

- As part of the core team, you will be working on cutting-edge technologies like AI products, online backtesting, data visualization, and machine learning.

- Develop and maintain scalable, robust backend systems using Python and Django framework.

- Proficient understanding of the performance of web and mobile applications.

- Mentor junior developers and foster skill development within the team.

Job Requirements :

- 4+ years of experience with Python and Django.

- Strong understanding of relational databases like PostgreSQL or MySQL and Redis.

- (Optional) : Experience with web front-end technologies such as JavaScript, HTML, and CSS

Who are we :

Trendlyne, is a Series-A products startup in the financial markets space with cutting-edge analytics products aimed at businesses in stock markets and mutual funds.

Our founders are IIT + IIM graduates, with strong tech, analytics, and marketing experience. We have top finance and management experts on the Board of Directors.

What do we do :

We build powerful analytics products in the stock market space that are best in class. Organic growth in B2B and B2C products have already made the company profitable. We deliver 900 million+ APIs every month to B2B customers. Trendlyne analytics deals with 100s of millions rows of data to generate insights, scores, and visualizations, which are an industry benchmark.

Strong Senior Backend Engineer profiles

Mandatory (Experience 1) – Must have 5+ years of hands-on Backend Engineering experience building scalable, production-grade systems

Mandatory (Experience 2) – Must have strong backend development experience using one or more frameworks (FastAPI / Django (Python), Spring (Java), Express (Node.js).

Mandatory (Experience 3) – Must have deep understanding of relevant libraries, tools, and best practices within the chosen backend framework

Mandatory (Experience 4) – Must have strong experience with databases, including SQL and NoSQL, along with efficient data modeling and performance optimization

Mandatory (Experience 5) – Must have experience designing, building, and maintaining APIs, services, and backend systems, including system design and clean code practices

Mandatory (Domain) – Experience with financial systems, billing platforms, or fintech applications is highly preferred (fintech background is a strong plus)

Mandatory (Company) – Must have worked in product companies / startups, preferably Series A to Series D

Mandatory (Education) – Candidates from top engineering institutes (IITs, BITS, or equivalent Tier-1 colleges) are preferred

About VisibilityStack

VisibilityStack helps businesses connect with people who are actively searching for the solutions they offer, both on Google Search and in the new wave of AI-powered search tools.

Our AI agents identify what your audience is looking for, create content that answers those questions, and structure it so Google and AI systems can easily understand and recommend it. We also strengthen your online credibility through strategic backlinks and a strong social presence.

Everything is guided by real-time data. We focus on what works, remove what does not, and keep your content working around the clock. The result is simple: the right people can find you, trust you, and reach out when they need what you offer.

The Role

We need a Senior Engineer who ships production code that scales. You'll be the technical anchor—building critical infrastructure, solving complex problems, and mentoring junior developers through code reviews and pair programming.

You'll shape our future in four key ways: writing the code that becomes our foundation, being a key voice in engineering hiring decisions, helping establish the processes and patterns everyone follows, and having significant input on product decisions—your technical perspective directly influences what we build, not just how we build it. This isn't about managing people or writing performance reviews—it's about technical leadership through excellence.

What's in it for you:

1. Own mission-critical systems end-to-end — Your code directly generates customer revenue
2. Skip the politics, ship products — No layers of approval, no enterprise bureaucracy
3. Shape product direction — Your technical insights influence product strategy, not just implementation
4. Learn cutting-edge AI in production — Work with LLMs, vector databases, and agent orchestration at scale
5. Shape technical decisions and processes — Your input matters on how we build, not just what
6. Accelerated growth path — As we scale, you choose: become our technical lead or remain a deeply influential IC
7. Direct founder access — Collaborate on product vision, not just execute specs

Location: Janakpuri, Delhi (Hybrid - Maker's Schedule)

Our Work Philosophy:

We follow the Maker's Schedule, not the Manager's Schedule. This means uninterrupted blocks of deep work when you're building, and high-bandwidth collaboration when we're solving problems together.

In Practice:

1. In-office days: Whiteboard architecture sessions, rapid product iterations, deep dives into product strategy, complex debugging that needs three minds on one problem
2. Deep work days: Uninterrupted coding from wherever you work best—home, office, or that coffee shop with perfect noise levels
3. Balance by design: We optimize for both intense collaboration and deep focus

The best technical breakthroughs happen in two modes: intense in-person collaboration where ideas bounce rapidly, and deep solo work where complex problems get solved. We protect both.

Responsibilities

Technical Excellence

1. Build production systems that handle millions of AI operations daily
2. Write complex integrations that others can't figure out
3. Solve scaling problems before they become emergencies
4. Implement robust error handling and monitoring
5. Own critical infrastructure components end-to-end

Architecture & Code Quality

1. Design APIs that won't need v2 in 6 months
2. Make pragmatic technical decisions (boring tech when appropriate)
3. Help establish engineering processes—from code review to deployment
4. Create patterns and standards other engineers can follow
5. Lead code reviews that teach, not just critique
6. Balance shipping speed with technical sustainability

Hiring & Technical Assessment

1. Conduct technical interviews for engineering roles
2. Design practical coding assessments that test real skills
3. Provide strong input on hire/no-hire decisions
4. Partner with founders on technical requirements for roles
5. Help close strong candidates by selling the technical vision

Mentorship & Collaboration

1. Pair with junior developers on complex problems
2. Share knowledge through code reviews and documentation
3. Unblock teammates when they're stuck
4. Work directly with founders on technical strategy
5. Partner with product team on feature design and technical feasibility
6. Turn product ideas into technical specifications
7. Work directly with founders on technical strategy
8. Turn product ideas into technical specifications

Requirements

Must Have

1. 5-7 years of software engineering experience
2. Expert-level Python development skills
3. Production experience with LLMs (OpenAI, Anthropic, not just prototypes)
4. Built systems that scaled (and dealt with the failures)
5. Strong debugging skills—you fix what others can't
6. API design that makes sense to other developers
7. Git workflows and collaborative development

Strong Advantages

1. Previous early-stage startup experience
2. Production experience with vector databases (Pinecone, Weaviate, pgvector)
3. Elasticsearch or search infrastructure expertise
4. Built revenue-generating AI/ML systems
5. Experience with high-volume data pipelines
6. Contributed to open source projects
7. Informal mentorship or tech lead experience

Tech Stack

1. Backend: Python, FastAPI, PostgreSQL
2. AI/ML: OpenAI APIs, LangChain, Vector DBs
3. Infrastructure: AWS, Docker, GitHub Actions
4. Search: Elasticsearch (evaluating alternatives)

What We Offer

1. Early employee equity and financial upside
2. No bureaucracy—your code ships to production
3. Work on genuinely hard technical problems
4. Learn from and contribute to cutting-edge AI systems
5. Clear growth path as the team scales

• Qualification: BE / B.Tech / ME / M.Tech
• You must have Experience of 3 - 7 years
• You must be proficient in Embarcadero Delphi10.3 or above Framework, Object oriented programing, clean code, Design patterns, Dependency Injection, Multithreaded programming
• Experience in cloud technology and mobile development
• Experience in using below libraries or equivalent
• DMVC Framework
• Mars Curiosity
• Developer Express
• FireDAC, ADO framework, TMS Aurelius
• Spring4d
• FMX Technology
• Knowledge on Cloud computing, IoT, Java script, Type script, Angular
• Good understanding of DevOps
• Experience in using ALM/Configuration management tools e.g. GIT
• Prior work experience in SQLite required
• You must be conversant with Agile software development processes / methodologies

What You Need to Succeed

• As a Delphi developer, you will understand, analyze and implement the requirements
• Create world class products using your knowledge in Delphi Framework and Libraries, OOPS programming skills, Design principles patterns
• Work with technologies : Cloud computing, IoT, Java script, Type script, Angular, Java
• Design, development and testing of new features in the applications
• Design implement DevOps Best practices, establish standards and policies for managing source code and continuous integration/delivery
• Responsible for regular communication with others involved in the development process
• Implement, test, and bug-fix functionality
• Participate as a team member in fully agile Scrum deliveries
• Experience in working with international environment with a multicultural team
• Exhibit excellent team spirit and good in communication

We are having an immediate requirement for a Python web developer.

You have:

• At least 2 years of experience developing web applications with Django/Flask/FastAPI
• Familiarity with Linux
• Experience in both SQL and NoSQL databases.
• Uses Docker and CI/CD
• Writes tests
• Experienced in application deployments and scaling them on AWS or GCP

You are:

• Eager to work independently without being watched
• Easy going.
• Able to handle clients on your own

Location: Remote (in India)