Headline

Immediate Joiner | Backend Engineer | X-CoinSwitch SDE Intern | Golang • C++ • PostgreSQL • Redis • Microservices • Distributed Systems | LeetCode Knight | Codeforces Specialist | Open to Full-Time SDE-1 Role

About

Backend Software Engineer with experience building scalable, production-grade systems using Go (Golang), Java, PostgreSQL, Redis, Docker, and AWS. Previously worked at CoinSwitch, where I developed secure fintech infrastructure, including high-performance REST APIs, a multi-tenant Identity and Access Management (IAM) platform with OpenFGA-based fine-grained authorization, Redis caching optimizations, and end-to-end observability using Grafana and Kibana. Experienced in designing concurrent backend services, distributed systems, and maintaining reliable production systems. Prior to that, I worked with AlgoUniversity (YC-backed), where I built CodeXcel, a full-stack online judge platform featuring a sandboxed multi-language code execution engine, JWT-based authentication, Dockerized infrastructure, and AI-powered code review capabilities. I enjoy solving complex engineering problems and building systems that are scalable, secure, and reliable. I also have experience developing AI-powered applications using Retrieval-Augmented Generation (RAG), LangChain, Pinecone, and Google Vertex AI. Competitive Programming: LeetCode Knight (Peak Rating: 1928) • Codeforces Specialist • Solved 1500+ DSA problems. Technical Skills: Go (Golang), Java, C++, PostgreSQL, Redis, REST APIs, Microservices, Distributed Systems, Docker, AWS, System Design, OpenFGA, JWT, CI/CD. Currently seeking full-time Software Engineer, Backend Engineer, or SDE-1 opportunities. Immediate joiner. Contact: adityakumar.swe@gmail.com

Location

Bengaluru

AI stack

antigravity

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cursor

opencode

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Work experience

Software Engineer Intern at CoinSwitch, Jan 2026 - Jul 2026 · 6 mo, Bengaluru, Karnataka, India, Building production backend services for a live fintech trading platform (Go, PostgreSQL, Redis, Grafana, Kibana). • Designed and built production RESTful APIs for API Trading Expiry Options, exposing multiple expiry types to trading clients; engineered concurrent data fetching with Go routines to reduce response latency and improve throughput under peak load. • Architected a multi-tenant IAM system with Role-Based Access Control (RBAC) on OpenFGA (fine-grained, relationship-based authorization), exposing 6+ secure REST APIs across the identity lifecycle; onboarded 25+ organizations. • Engineered a delegated, scoped permission model with token-authenticated endpoints, expiring access grants (configurable TTL), and an approval workflow — enforcing least privilege and preventing privilege escalation. • Served as primary on-call engineer during a one-week production rotation, triaging and resolving alerts across distributed services to maintain high availability. • Built end-to-end observability (Grafana dashboards + Kibana structured logging), reducing mean time to detection (MTTD) by 50%. • Optimized Redis caching with strategic TTL eviction policies, reducing memory footprint by 30% and lowering infrastructure cost.

Software Developer Extern at AlgoUniversity, May 2025 - Jul 2025 · 3 mos, Built a production full-stack platform end to end (React, Node.js, Express, MongoDB, Docker, AWS). • Architected and developed CodeXcel, a production-grade full-stack MERN online-judge platform, reducing problem search time by 35%; containerized with Docker and deployed on AWS (EC2, ECR), scaling to 100+ concurrent users. • Developed JWT-authenticated RESTful APIs improving compilation speed by 20% and submission capacity by 50%; engineered a custom multi-language compiler for sandboxed C++, Python, and Java evaluation. • Integrated an AI-powered code reviewer to surface improvement suggestions on accepted submissions.

Freelance Web Developer at STEMMED EDVOCATIONS, Jun 2024 - Jul 2024 · 2 mos, Remote, Freelance, STEMMED: "Built and deployed a responsive marketing website for an ed-tech client (HTML/CSS/JS).

Teaching Assistant at Coding Ninjas, Jan 2023 - May 2023 · 5 mos, remote, TA, Coding Ninjas: "Guided 100+ students through DSA coursework; reviewed code and led doubt-clearing sessions on recursion, trees, and DP."

Campus Ambassador at Indian Institute of Technology, Kanpur, Aug 2022 - Mar 2023 · 8 mos

Education

Integrated M.Sc (Dual Degree), Mathematics and Computer Science, Birla Institute of Technology, Mesra

Intermediate, Divya Bhaskar public School

Public links

github: https://github.com/spidycoder

leetcode: https://leetcode.com/spidycoder178

codeforces: https://codeforces.com/profile/spidycoder