Staff Software Engineer - Fullstack
Critical Start
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Benefits offered by this job
Job summary
Critical Start Technologies Private Ltd. in India is hiring a Staff Software Engineer for the Fullstack team. You will design, build, and maintain web applications and backend services, driving performance and reliability while mentoring peers and collaborating with cross-functional teams.
The role requires 12+ years of experience in full stack development with Vue/React, Django, Python, and modern frontend tech. A hybrid work setup is expected, with collaboration across Vista’s global network.
Qualifications
- 12+ years of full stack development experience with Vue or React, Django, Python, JavaScript, HTML, CSS, and Bootstrap.
- Advanced Python and Django skills; backend-focused with frontend requirements.
- Experience applying data structures and algorithms in production software.
- Experience working on agile teams and in Git workflows.
- 5+ years leading agile teams, setting technical direction, and coaching team members.
- 5+ years in software design and architecture.
- Experience diagnosing and fixing production issues.
Responsibilities
- Design, build, and deploy web applications using Python, Django, Vue.js, HTML, CSS, JavaScript, and Bootstrap.
- Design and build microservices-based backend systems.
- Make technical decisions for the team and document standards and architecture.
- Write, test, and maintain code that meets product requirements.
- Meet targets for page load time, API response time, and uptime.
- Mentor junior developers through code reviews and pair programming.
- Review pull requests and provide written feedback.
- Troubleshoot, debug, and upgrade existing applications.
- Profile and tune applications to handle higher load.
- Train the team on AI tools that reduce development time.
Skills
Education
Tools
Job description
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.
Critical Start , a Vista‑backed company, is on a mission to stop breaches, simplify security, and shape the future of cyber defense. We deliver 24x7 AI-accelerated, human‑validated detection, investigation, and response across IT and OT, helping organizations outpace evolving threats with faster response and measurable risk reduction.
Innovation isn't just a buzzword here; it's our DNA. We pioneered the first MOBILESOC app for on‑the‑go detection and response, infused AI into automated alert resolution to eliminate noise, and slashed investigation time by an astounding 99.3%. We're transforming how security teams work, and you could be a part of it. From AI‑assisted triage to analyst copilots that elevate human expertise, we combine machine intelligence with human judgment to deliver outcomes our customer's trust.
If you're looking for a high‑trust, high‑impact team where your ideas are amplified by AI and valued by colleagues and customers alike, Critical Start is the place for you. Come build the future of cybersecurity with us.
With Vista’s investment and strategic guidance, we combine the agility of a growth‑stage company with the scale, stability, and career opportunities of a global technology network. Our teams are empowered to innovate, collaborate, and build meaningful solutions that drive measurable outcomes for customers worldwide.
- 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 Staff Software Engineer to join the Critical Start Technologies Private Ltd. team, operating under the Critical Start umbrella, for our India operations. As a Staff Software Engineer on the Fullstack Team, your responsibilities will encompass the design, development, testing, deployment, maintenance, and enhancement of mobile and browser‑based end user experiences and creating the supporting APIs for Critical Start customers and employees. In addition to these tasks, you will play a key role in providing technical leadership to the team.
Critical Start teams assume complete ownership of delivering high‑quality solutions and are dedicated to continually enhancing team performance. As a staff software engineer, you're expected to bring versatility, leadership qualities, adeptness in navigating ambiguity, and a passionate commitment to delivering delightful solutions for end users. Your role will involve actively contributing to pushing technology forward within the organization.
This role is designated as a hybrid position. You are required to have a reliable high-speed internet connection, the ability to participate in video meetings, and a dedicated home office or private workspace suitable for professional work. As the position involves collaboration with U.S.-based teams and clients, you will be expected to work during overlapping hours with U.S. business hours, as guided by your manager.
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:
- Design, build, and deploy web applications using Python, Django, Vue.js, HTML, CSS, JavaScript, and Bootstrap.
- Design and build microservices‑based backend systems.
- Make technical decisions for the team and document them, including coding standards and architecture choices.
- Write, test, and maintain code that meets product requirements.
- Meet defined targets for page load time, API response time, and uptime.
- Implement authentication, authorization, and data encryption.
- Integrate AI tools (such as LLM APIs and code assistants) into the microservices backend.
- Design and build REST APIs that connect the front end to microservices.
- Work with product managers, UX/UI designers, and developers to turn requirements into technical designs.
- Mentor junior developers through code reviews, pair programming, and design discussions.
- Review pull requests and give written feedback.
- Troubleshoot, debug, and upgrade existing applications.
- Profile and tune applications to cut response times and handle higher load.
- Evaluate new tools and frameworks, and adopt those that solve a team problem.
- Train the team on AI tools that reduce development time.
We're seeking a candidate who brings passion, curiosity, and a drive for excellence. The ideal profile includes:
- 12+ years of full stack development with Vue or React, Django, Python, JavaScript, HTML, CSS, and Bootstrap.
- Advanced Python, Django, and microservices skills. This role is backend‑focused, and front‑end skills are also required.
- Experience applying data structures and algorithms in production software.
- Experience working on agile teams (sprints, stand‑ups, retrospectives).
- 5+ years using Git workflows, including pull requests.
- 5+ years leading agile teams, setting technical direction, and coaching team members.
- 5+ years in software design and architecture.
- Experience diagnosing and fixing production issues.
- Experience building cross‑platform Android and iOS apps with Dart and Flutter.
- Experience building mobile and browser interfaces that meet WCAG accessibility standards and adapt to different screen sizes.
- Experience managing AWS resources (S3, EC2, ECS) with Terraform.
- Master’s degree or PhD in Computer Science or a related field.
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!
- Competitive salary
- Statuary PTO (Paid Time Off) policy
- Depending on the role, you may work in the office, remotely, or adopt a hybrid work model.
We prioritize your privacy and security. Please note that Critical Start will never request financial information or sensitive personal data during the interview process. If you encounter any suspicious requests, do not respond and contact us directly at recruiting@criticalstart.com. Thank you for helping us maintain a safe and trustworthy hiring experience.
Critical Start welcomes people from all backgrounds and walks of life. One of our core values is to “Do what’s best for our employees,” and that starts with the hiring process by finding the best candidates and providing an environment that upholds equal employment opportunities for all employees and applicants, strictly prohibiting any form of discrimination or harassment based on race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.
This policy encompasses all aspects of employment, including recruitment, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.
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.
- 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.
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