Senior Software Engineer - Fullstack

Onit; Pune District; On-site; INR 3,000,000 - 5,000,000; Full time

Benefits offered by this job

Health coverage

Flexible PTO

Family leave & surrogacy reimbursement

Life and disability insurance

Voluntary benefits

Flexi accounts

Volunteer day

Job summary

Onit, a Pune-based AI-powered legal tech company, is seeking a Senior Software Engineer, Full-Stack to join the enterprise platform. You'll own features end to end across Rails backend and modern JS frontend, delivering data-dense, accessible experiences for legal teams.

Collaborate with design, product, and architecture squads, implement robust APIs, build visualizations, and write tests. The role emphasizes performance, edge cases, and cross-browser consistency, with a path to impact at scale.

Qualifications

• 6+ years building production web applications with significant frontend ownership and backend development.
• Strong backend experience with Ruby on Rails: building and modifying APIs, data models, and services.
• Proficiency with a modern JavaScript framework (React, Angular, or Vue) and solid JavaScript/TypeScript fundamentals.
• Experience building data-dense interfaces: charts, tables, dashboards, or comparison views.
• Experience working inside large existing codebases and avoiding regressions.
• Care for edge cases, empty states, and error handling, backed by automated tests (e.g., RSpec).
• Strong collaboration with designers and product managers; asks clarifying questions before building.
• Familiarity with AI coding tools to accelerate development, with judgment to review AI-generated code.

Responsibilities

• Build substantial, interactive features inside our enterprise product without disrupting workflows.
• Implement data visualizations and real-time filtering/comparison controls.
• Extend Rails APIs and integrate with architecture-team APIs; ensure interfaces are robust.
• Ensure asynchronous loading and no blocking of user workflows.
• Build for accessibility and cross-browser consistency.
• Instrument features to measure usage and performance; write comprehensive tests.

Skills

Full-stack ownership

Ruby on Rails backend

React/Angular/Vue

Data-dense interfaces

Large codebases

Edge cases & automated tests

AI coding tools

Tools

Ruby on Rails

React/Angular/Vue

RSpec

APIs

Job description

About Onit

We're redefining the future of legal operations through the power of AI. Our cutting-edge platform streamlines enterprise legal management, matter management, spend management and contract lifecycle processes, transforming manual workflows into intelligent, automated solutions.

About Onit

We're redefining the future of legal operations through the power of AI. Our cutting-edge platform streamlines enterprise legal management, matter management, spend management and contract lifecycle processes, transforming manual workflows into intelligent, automated solutions.

We’re a team of innovators using AI at the coreto help legal departments become faster, smarter, and more strategic. As we continue to grow and expand the capabilities of our new AI-centric platform, we’re looking for bold thinkers and builders who are excited to shape the next chapter of legal tech.

If you're energized by meaningful work, love solving complex problems, and want to help modernize how legal teams operate, we’d love to meet you.

Position Summary

The Senior Software Engineer, Full-Stack builds substantial, interactive features inside On's enterprise legal operations platform, spanning enterprise legal management, matter management, spend management, and contract lifecycle management. Working across a Ruby on Rails backend and a modern JavaScript frontend, this individual contributor delivers data-dense, accurate, and resilient user experiences that fit seamlessly into the workflows legal teams rely on every day. The role partners closely with design, product, and the architecture team, owning features end to end from API to interface, with a strong focus on edge cases, performance, accessibility, and test coverage.

Key Responsibilities

• Build substantial, interactive features inside an existing enterprise product, without disrupting the workflows they sit within.
• Implement data visualizations (line charts, comparison tables, range indicators) where the visual encoding carries real meaning and small inaccuracies mislead users.
• Build filtering and comparison controls that update complex views in real time.
• Implement every state the feature can be in: loading, error, empty, and the cases where there is insufficient data to show a comparison at all. These matter as much as the primary path.
• Build and extend Ruby on Rails APIs, consume APIs built by the architecture team, and push back early when a contract does not serve the interface well.
• Work closely with design, matching intent precisely and raising discrepancies rather than approximating.
• Make sure features load asynchronously and never block or slow the workflows they are embedded in.
• Build for accessibility and cross-browser consistency.
• Instrument features so the team can measure how they are actually used.
• Write tests that cover behavior, including the degraded cases.

Required Skills

• 6+ years building production web applications, with significant frontend ownership and hands-on backend development.
• Strong backend experience with Ruby on Rails: building and modifying APIs, data models, and services, not only consuming them.
• Strong proficiency with a modern JavaScript framework (React, Angular, or Vue) and solid JavaScript/TypeScript fundamentals, including a real understanding of rendering and state management, not just framework APIs.
• Experience building data-dense interfaces: charts, tables, dashboards, or comparison views where accuracy of presentation matters.
• Experience working inside large existing codebases: reading unfamiliar code, following established conventions, and avoiding regressions.
• Demonstrable care for edge cases, empty states, and error handling, backed by automated tests (e.g., RSpec and frontend testing frameworks).
• Strong collaboration with designers and product managers; asks clarifying questions before building.
• Working proficiency with AI coding tools (e.g., Claude, GitHub Copilot) to accelerate development, debugging, and test writing, with the judgment to review and validate AI-generated code before it ships.

Benefits & Perks That Support You

• Health Coverage: Employee and immediate family members.
• Time Away: Flexible paid time off and 10 company paid holidays annually.
• Family Support: Exceptional paid leave for birth parents, non-birth parents, and caregivers. Onit also offers surrogacy and adoption reimbursement.
• Income Protection: 100% employer-paid life and disability insurance.
• Additional Coverage Options: Voluntary benefits including hospital indemnity, critical illness, accident.
• Tax-Advantaged Accounts: Flexi, NPS.
• Community Engagement: One paid volunteer day each year to give back to the community.

Our Commitment to Applicants

We know that not everyone will check every box in a job description. At Onit, we value diversity, inclusion, and authenticity. If you're excited about this role but your experience doesn’t align perfectly with every qualification, we encourage you to apply. You may be exactly who we're looking for.

Onit Values

• Customer First - Customer success is our success. We deliver value, listen, and act on customer needs.
• Purposeful Innovation - Innovation fuels our growth. We harness creativity to solve problems and lead with the intentions and expertise.
• Win as One - Teamwork is how we win. We are accountable, act with integrity, and communicate openly.
• Intentional Growth - Our people are the difference. We create an environment with compelling work, impactful contributions, and career growth.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.