Senior Software Engineer

Vista Equity Partners is a leading global investment firm focused exclusively on enterprise software, data, and technology-enabled businesses. With over $100B+ in assets under management and a portfolio of 90+ companies worldwide, Vista accelerates growth through operational excellence, shared expertise, and long-term partnership. In India, Vista’s presence continues to expand with 45+ portfolio companies employing more than 17,000 professionals across technology, product, customer success, and operations – reinforcing India’s strategic role as a hub of innovation and talent within the Vista ecosystem. 

Through its Agentic AI Factory, Vista is embedding Generative AI across its global portfolio, enabling companies to integrate intelligent, responsible AI into products, operations, and decision-making. This initiative is strengthened through portfolio-wide learning programs, leadership workshops, and AI hackathons that foster innovation, build fluency, and accelerate practical AI adoption across teams. 

At Critical Start Technologies Private Ltd., our people are our greatest advantage, and we empower our team to make a real impact by transforming how the world defends against cyber threats. Our employee value proposition reflects what we stand for and the experience we create for every team member:  

• Purpose-Driven Mission Join a team united by a clear and inspiring purpose: to stop breaches, simplify security, and shape the future of cyber defense. Every role directly contributes to protecting organizations and strengthening global resilience.  

• Innovation at the Core Innovation is in our DNA. From pioneering the first MOBILESOC app to leveraging AI to reduce investigation time by 99.3%, we continuously push boundaries. Team members can work with cutting-edge technologies that redefine what’s possible in cybersecurity.  

• Human + AI Collaboration We combine the best of machine intelligence and human judgment to deliver trusted outcomes. You’ll work in an environment where AI elevates expertise—through AI-assisted triage, automated alert resolution, and analyst copilots—empowering you to focus on high-impact work.  

• High-Trust, High-Impact Culture We thrive on collaboration, transparency, and shared success. Your ideas are valued, your growth is supported, and your contributions drive meaningful results. This is a place where your work truly matters. 

Together, these pillars define what it means to work at Critical Start, a place where you can do the most meaningful work of your career, supported by Vista’s global ecosystem. Vista’s ecosystem enables purposeful career mobility and sustained professional growth. Employees benefit from the ability to build diverse experiences, collaborate with high-performing peers across portfolio companies, and progress into new roles within a global network of leading enterprise software organizations. This shared talent environment strengthens capabilities, broadens perspective, and supports long-term career development across the Vista portfolio. 

Join us and let’s build the future of cybersecurity together! Want to hear from our team? Watch these videos to gain insights into life at Critical Start or check out our Glassdoor reviews for an inside look. 

We are seeking a Senior Software Engineer to join the Critical Start Technologies Private Ltd. team, operating under the Critical Start umbrella, for our India operations. As a Senior Software Engineer on the User Experiences Team, you will contribute to the design, development, testing, deployment, maintenance, and enhancement of mobile and browser-based end user experiences (including supporting APIs) used by Critical Start customers and employees.

Critical Start Teams take full ownership for delivering high-quality solutions and continually improving team performance. Team members are expected to be versatile, display leadership qualities, be skilled at working through ambiguity, and enthusiastically deliver delightful solutions for end users, while continuously pushing technology forward.

In this role, you will be responsible for driving impact by contributing to our Engineering function. You'll collaborate with cross-functional teams, apply your expertise to real-world challenges, and deliver solutions that improve outcomes for customers worldwide. Your day-to-day will include: 

• →Build, test, deploy, and maintain customer-facing and employee-facing web and mobile applications.
• →Lead architecture design reviews with engineers, product owners, and engineering managers, and document the decisions.
• →Review peers’ pull requests for style compliance, correctness, maintainability, test coverage, and performance. Give written feedback on each.
• →Update technical documentation and training materials when product features change or users report gaps.
• →Triage production incidents, identify the root cause, and write a post-incident action plan with owners and due dates to prevent recurrence.

We're seeking a candidate who brings passion, curiosity, and a drive for excellence. The ideal profile includes:

• Bachelor’s degree, or 4+ additional years of professional software engineering experience.
• 4+ years of full stack development with Django, Python, JavaScript, HTML, CSS, and Bootstrap, plus at least one of Vue, React, or Angular.
• 2+ years building Android and iOS apps with Dart and Flutter (required).
• 3+ years of professional work applying data structures and algorithms (for example, optimizing queries or reducing time complexity).
• 2+ years working in Scrum or Kanban teams.
• Hands-on experience using AI coding assistants (for example, Claude Code, GitHub Copilot, or Cursor) in daily development.
• 2+ years using Git branching workflows and pull requests.

• Experience building mobile and web interfaces that meet WCAG 2.1 AA and adapt to different screen sizes.
• Experience provisioning AWS resources (S3, EC2, ECS) with Terraform.
• Master’s degree or PhD in Computer Science.

It's important to note that specific physical and mental requirements may vary depending on the nature of the office job, organization, and individual responsibilities. 

Joining Critical Start Technologies Private Ltd. means contributing to a mission-driven team while being part of the broader Vista portfolio family. You’ll have the opportunity to innovate, grow your career, and help share the future of Critical Start in India, while staying connected to peers and leaders across Vista’s global network. We offer a dynamic, supportive, and engaging work environment where meaningful work and a relaxed, comfortable culture go hand in hand! 

• Stationary position for extended periods of time. 
• Constantly operate a computer.  
• Occasionally you may be required to move equipment or other items up to 20 lbs. 
• The ability to communicate information and ideas so others will understand. Must be able to exchange accurate information in these situations. 

• Must be able to apply established protocols in a timely manner. 
• Make timely decisions in the context of workflow. 
• Ability to complete tasks and perform in situations requiring speed deadlines, or productivity quota. 
• Ability to work effectively and efficiently in high stress situations. 
• Ability to simultaneously address multiple complex problems. 

Interested candidates are invited to visit our career site and apply for the position: https://www.criticalstart.com/careers/