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The job description asks for Rust, Java, data structures, algorithms, software design principles, scalable backend services, APIs and microservices. Make sure your resume shows the ones you have, in the words the job uses: applicant tracking systems look for them.

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This is based in Mumbai Metropolitan Region.

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Software Developement Engineer III (JAVA+Rust)

Upstox

Mumbai Metropolitan Region

Software Engineer III – Rust + Java

Location: Mumbai

Work Arrangement: 5 days in the office

About Upstox

At Upstox, we're building the future of investing — simple, powerful, and for everyone. We're one of India's fastest-growing fintech platforms, backed by the best in the business, including Mr. Ratan Tata and Tiger Global, and on a mission to make wealth creation accessible to every Indian. From first-time investors to seasoned traders, millions trust us to power their financial journeys. We're not just moving fast — we're moving with purpose. If you thrive in a high-energy, high-impact environment, you're in the right place.

The Role: Software Engineer III – Rust + Java

We're looking for an experienced Software Engineer III with strong hands-on expertise in Rust and Java to build scalable, high-performance, and reliable backend systems that power Upstox's investing platform.

You'll work on critical backend services, solve complex engineering challenges, and contribute to building robust and efficient systems. This role is ideal for someone who enjoys working on distributed systems, performance optimization, and backend architecture.

What You'll Own

Design, develop, and maintain scalable backend services using Rust and Java
Build high-performance, reliable, and low-latency systems for financial applications
Develop and optimize APIs, microservices, and distributed system components
Write clean, maintainable, testable, and efficient code
Identify and resolve performance bottlenecks, production issues, and system reliability challenges
Work with databases, messaging systems, and caching layers to build robust backend infrastructure
Participate in system design discussions, code reviews, and architectural decisions
Collaborate with Product, QA, DevOps, and engineering teams to deliver high-quality solutions
Improve system observability, scalability, and production stability
Take ownership of technical deliverables and contribute to engineering best practices

What We're Looking For

6–10 years of experience in software development and backend engineering
Strong hands-on experience with Rust and Java
Strong understanding of data structures, algorithms, and software design principles
Experience building scalable backend services, APIs, and microservices
Good understanding of distributed systems, concurrency, multithreading, and asynchronous programming
Experience with relational and/or NoSQL databases, data modeling, and query optimization
Familiarity with messaging systems, caching mechanisms, and performance optimization
Experience with Git, automated testing, CI/CD, and software development best practices
Strong debugging, analytical, and problem-solving skills
Ability to independently own complex technical deliverables and collaborate effectively across teams
Experience with Kafka or similar messaging platforms

Good to Have

Experience in fintech, stock broking, trading, or financial services
Exposure to high-throughput, low-latency systems and real-time data processing
Familiarity with cloud platforms, Docker, and Kubernetes
Understanding of order management, transaction processing, or financial market systems
Experience with observability, monitoring, and production incident management

Why This Role Rocks

You'll get to build technology that powers the investing journeys of millions of Indians. You'll solve complex engineering challenges, work on scalable backend systems, and collaborate with talented teams to create reliable, high-performance products that make a real impact.

By applying for this position, you acknowledge that you have reviewed ourProspective Employee Privacy Notice , which outlines how Upstox collects, uses, and protects your Personal Information ("PI"). I accept Upstox's Prospective Employee Privacy Notice. Upstox is an Equal Opportunity Employer; all qualified applicants will receive consideration for employment without regard to race, colour, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or other characteristics.

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