Sibi is available for hire
Hire SibiSibi Prabakaran
Verified Expert in Engineering
Linux Developer
Bengaluru, Karnataka, India
Toptal member since January 22, 2021
Bio
Sibi is a principal engineer with over 14 years of experience in building distributed systems, cloud platforms, and blockchain protocols. A hands-on architect and technical leader, he excels in designing reliable back-end systems and leading distributed teams. Sibi is also a long-time open-source maintainer in the Rust and Haskell ecosystems, showcasing his commitment to the developer community.
Portfolio
677 Financial Group
Amazon Web Services (AWS), Cloudflare
FP Complete
Rust, TypeScript, SQL, Linux, Cloudflare
FP Complete
Kubernetes, Amazon Web Services (AWS), Azure, DevOps
Experience
- Linux - 10 years
- Kubernetes - 4 years
- Amazon Web Services (AWS) - 4 years
- Terraform - 4 years
- Amazon EKS - 4 years
- Docker - 4 years
- Azure - 2 years
- Azure Kubernetes Service (AKS) - 1 year
Work Experience
Head of Devops
2026 - PRESENT
677 Financial Group
- Built edge services on Cloudflare Workers in Rust with Queues for async processing and a TypeScript SSR layer, moving request handling closer to users.
- Added job-watcher monitoring to the client's indexer pipeline so stuck or failed background jobs page the team instead of stalling silently.
- Set up transactional email using Cloudflare's Email Routing and Email Workers API, including SPF, DKIM, and DMARC records for reliable deliverability.
Technologies: Amazon Web Services (AWS), Cloudflare
Principal Engineer
2023 - 2026
FP Complete
- Architected and built a bare-metal Kubernetes platform for a low-latency arbitrage platform, owning the control plane, networking, and distributed storage; achieved the client's latency and cost targets.
- Deployed and maintained the Stackage server, the core Haskell infrastructure that developers and production systems depend on, keeping it reliable and available for the ecosystem.
- Led the migration of a client's entire AWS operation (applications and database workloads) to a bare-metal cloud in two weeks, reducing their monthly infrastructure spend by 90%.
- Built a new Azure platform for healthcare and veterinary clients, from CI to deployment pipeline, replacing their manual deployments with a fully automated flow; preview URLs gave the entire team faster feedback and cut iteration time by 50%.
- Led CI optimization across client and internal projects, in one case cutting build times from 45 minutes to under 4 minutes.
- Served as lead engineer and production maintainer of Zehut, FP Complete's internal SSO service for temporary AWS credentials.
Technologies: Rust, TypeScript, SQL, Linux, Cloudflare
Lead Engineer
2021 - 2023
FP Complete
- Led engineering and served as principal architect for Kube360, FP Complete's flagship multi-cloud Kubernetes platform running around 100 worker nodes across AWS and Azure, with a curated add-on catalog.
- Designed and operated the platform's reliability backbone: observability, backup, authentication, and secure cluster access, running production client clusters through upgrades and recovery without service interruption.
- Developed and shipped the platform's self-service dashboard and CLI, giving clients secure access to operate their own clusters, with authentication tied to the organization's IAM.
Technologies: Kubernetes, Amazon Web Services (AWS), Azure, DevOps
Senior Engineer
2018 - 2021
FP Complete
- Led distributed engineering teams and delivered production systems end-to-end across 10+ client engagements in DeFi, healthcare, and cloud infrastructure, with active involvement in architecture, application development, and cloud operations.
- Authored the copy-trading contract and trader-bot integration for Levana (perps DEX), contributing to governance, factory, and countertrade contracts; reduced AWS spend by 50% and added DDoS protection.
- Led the delivery of a new product on the Supercede reinsurance platform as project lead, collaborating with a domain expert to translate complex financial requirements into production ledger algorithms.
- Directed the development of the MySQL back end for Hasura's GraphQL engine, contributing across the query-planning and database layers; worked directly with customers to diagnose and resolve BigQuery backend issues.
- Designed a lending protocol from scratch on NEAR for Satoshi Port and delivered the end-to-end implementation, engineering multi-step promise flows to maintain resilience during asynchronous cross-contract calls with partial failures.
Technologies: Amazon Web Services (AWS), Haskell, Rust, NGINX, Istio, Kustomize, Terraform, Azure, Azure Kubernetes Service (AKS), Amazon EKS, Kubernetes
Senior Consultant
2017 - 2018
Xebia Group
- Built a high-performance, secure PDF generation server (Yesod and cryptonite) serving the Presentations platform.
- Extended the open-source Hapistrano deployment library with custom workflow support, cutting deployment time and eliminating manual errors for McKinsey cloud deployments.
- Delivered user-facing features for the Patient Support app that proactively anticipated member needs and triggered personalized messaging.
Technologies: Haskell, PureScript, Redux, React, Node.js, JavaScript
Software Architect
2016 - 2017
Pneuma Innovations
- Created a reusable, plug-and-play RESTful API layer by adapting Yesod's subsite mechanism — open-sourced as a reference architecture (github.com/psibi/yesod-rest).
- Replaced a fully manual build-release-deploy process with automated Hapistrano pipelines; upstreamed missing features to the open-source project.
- Hardened the production stack with Nginx reverse-proxying, Cloudflare SSL/caching/DDoS protection, and CloudWatch monitoring: zero outages from launch.
Technologies: Amazon Web Services (AWS), Yesod, Amazon CloudWatch, Cloudflare, NGINX, Docker, Redux, React Router, React, JavaScript, Haskell
Software Engineer
2014 - 2016
Inkmonk
- Hired as their first engineer. Wrote various core services that power Inkmonk’s market platform.
- Implemented support applications for the operations team to track orders, change status, and send notifications to the customers. Simplified operational team tasks by integrating various third-party services (Bluedart, Aftership) into our platform.
- Provided basic admin functionality using Flask-admin, which was later rewritten to a full-fledged dashboard using AngularJS and custom APIs.
Technologies: AngularJS, React, JavaScript, Flask, Python
Researcher
2012 - 2014
Tata Consultancy Services
- Developed a large-scale system for simulating vehicular traffic using GIS data. It simulated various regions, including parts of Chennai, Singapore, and Dubai.
- Wrote FFI API code for the interaction between the C++ simulator and the Python code. This made scripting easier and allowed external plugins to easily drive the simulator.
- Designed a product that allowed forecasting and analysis of regions. It allowed the integration of custom rules, which enabled building complex models for experimenting and understanding patterns.
Technologies: Haskell, C++, C, Python, JavaScript
Project History
Rucredstash
https://github.com/psibi/rucredstashRust port of credstash. It uses a combination of AWS Key Management Service (KMS) and DynamoDB to store secrets. This is needed when you want to securely store and retrieve your credentials (such as database passwords, API keys, etc.).
Fakedata
https://github.com/fakedata-haskell/fakedataA high-performance library for generating realistic fake data (names, addresses, companies, and currencies) in Haskell. Built around a monadic generator with flexible combinators for composing complex randomized values. Available on Hackage and Stackage.
Haskell Tldr Client
https://github.com/psibi/tldr-hsA native Haskell client for tldr pages (simplified, community-driven man pages). Features offline caching, platform-specific page filtering, and multi-language support. Available on Hackage and Stackage.
Education
2008 - 2012
Bachelor's Degree in Computer Science
SASTRA University - India
Certifications
JULY 2022 - JULY 2025
AWS Certified Solutions Architect
Amazon Web Services (AWS)
JANUARY 2022 - JANUARY 2025
AWS Certified Cloud Practitioner
Amazon Web Services (AWS)
Skills
Libraries/APIs
Playwright, React, React Router, Node.js
Tools
Emacs, NGINX, Amazon EKS, Azure Kubernetes Service (AKS), Terraform, Kustomize, Apache, Amazon CloudWatch, Istio, AWS Key Management Service (KMS)
Frameworks
Yesod, Django, Flask, AngularJS, Redux
Platforms
Linux, Docker, Kubernetes, Azure, Amazon Web Services (AWS), Amazon EC2
Languages
Rust, Haskell, SAML, JavaScript, Python, C, C++, PureScript, TypeScript, SQL
Paradigms
Agile, DevOps
Storage
Amazon DynamoDB, Amazon S3 (AWS S3)
Other
CI/CD Pipelines, APIs, Cloud Infrastructure, Identity & Access Management (IAM), GitHub Actions, QA Automation, Networks, Cloudflare, Load Balancers, Web3, Full-stack, Software Development, Azure Pipelines
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