Md Arif Hossain.
Senior Software Engineer
I build scalable web products end-to-end — leading the frontend, then building the services behind it.
about
A bit about me
I'm Md Arif Hossain, a senior software engineer based in Dhaka, Bangladesh.
Six years in, my work has settled into a shape I like: own the frontend completely, then keep going. At Fin.com I lead the web UI across products with React and Next.js, maintain NestJS services, build Web3 backend endpoints in Hapi.js, and I'm going deeper into Go with clean architecture — learning it the way it sticks, through production code and PR reviews from engineers better than me. Before this I led the web team at River on a B2B eSIM platform, and spent three years at Wind.App building crypto on/off-ramps, batch payout dashboards, and mobile wallets on Polygon. Outside work I build small SaaS and freemium products — mostly to learn, sometimes to launch.
I hold a B.Sc. in Computer Science from Southwest Forestry University, Kunming, China (2018–2021).
Dhaka, Bangladesh (UTC+6) — working with a New York team
Certifications
- Web Development — Programming Hero, May 2020
- Introduction to Artificial Intelligence (AI) — Coursera, Sep 2020
- Advanced Relational Database and SQL — Coursera, Jul 2020
- Python (Basic) Certificate — HackerRank, Jul 2020
- RESTful API with HTTP and JavaScript — Coursera, Jul 2020
experience
Where I've worked
Six years, nine companies, five countries.
Oct 2025 — Present · New York, USA · hybrid
Senior Software Engineer @ Fin.com
Fin makes global payouts easier — a payment orchestration platform with a public API. Building scalable web products end-to-end, leading frontend while growing into backend engineering with Go.
- Lead frontend development end-to-end with React.js and Next.js, owning the majority of the web UI across products
- Contribute as a full-stack engineer: build and maintain NestJS services, and develop Web3 backend services with Hapi.js for blockchain-integrated features
- Develop Go backend services with clean architecture — learning hands-on through production work and senior-engineer PR reviews
- Build event-driven microservices backed by PostgreSQL, Apache Kafka, Redis and RabbitMQ
- Deploy services on AWS with Docker, picking up infrastructure and DevOps practice alongside the DevOps engineer
- Use Claude Code and other AI tooling to accelerate delivery and raise code quality
React.jsNext.jsTypeScriptNestJSHapi.jsGoPostgreSQLApache KafkaRedisRabbitMQDockerAWSApr 2025 — Sep 2025 · Dhaka, Bangladesh · hybrid
Senior Software Engineer (Web Lead) @ River
River helps governments and businesses empower 300M+ global citizens with banking and connectivity. Acquired Wind.App.
- Led frontend development for River's eSIM B2B product as web lead, working alongside a cross-functional team
- Architected scalable frontend solutions for a global banking and connectivity platform
- Built and maintained the River corporate website
- Mentored team members and established frontend best practices across the web team
- Contributed to technical decision-making and product roadmap planning
Next.jsReact.jsTypeScriptZustandTanStack Queryshadcn/uiTailwind CSSJan 2025 — Mar 2025 · Banani, Dhaka, Bangladesh · hybrid
Senior Software Engineer @ Wind.App(acquired by River)
This role continued directly into the River role after the acquisition.
- Owned a complete product build — website, admin dashboard and backend server — for a German enterprise client (ihrHelden) using Next.js 14, NestJS, Prisma, AWS and Azure OpenAI
- Integrated an Azure-hosted GPT model into the product experience
- Led frontend architecture decisions and code-quality initiatives
- Managed the deployment pipeline and AWS infrastructure
Next.js 14NestJSPrismaPostgreSQLAWSAzure OpenAIMar 2022 — Jan 2025 · Banani, Dhaka, Bangladesh · hybrid
Software Engineer @ Wind.App(acquired by River)
Wind was a decentralised bank built on self-custodial wallets — instant, almost-free global payments on Polygon with a familiar Web2 interface. Product tagline: “Borderless payments for everyone.”
- Built Wind Platform for crypto on-ramp and off-ramp using Next.js and Redux
- Built the Wind Batch Payout business dashboard with Next.js, Redux, styled-components, Web3Auth and Torus, covered by Cypress E2E tests
- Built Wind Widget with cash-out features for Philippines customers
- Shipped wind.app v1 (React.js + MUI) and v2 (Next.js + Tailwind CSS)
- Built the Wind mobile app MVP with React Native and Web3.js
- Built a MERN-stack CMS dashboard and a set of transactional email templates
- Managed AWS infrastructure: Amplify deployments, EC2 with multi-environment Docker images, Route 53, S3
Next.jsReduxstyled-componentsReact NativeWeb3.jsWeb3AuthTorusCypressAWSDockerDec 2022 — Apr 2024 · Phoenix, Arizona, USA · remote · Part-time
Full Stack Developer (MERN) @ Space Cats
Held concurrently with the full-time Wind.App role. First role with production-grade backend systems at company scale.
- Delivered production-ready applications with React.js, Next.js, TypeScript, MUI and Tailwind CSS — landing pages, dashboards and complex UI workflows
- Built and maintained secure, scalable REST APIs with Express.js; worked with Laravel Blade templates where required
- Led the frontend team — ran code reviews, mentored peers, and held weekly growth discussions
- Owned multiple products simultaneously (HandyCop, Evidence Store) with a focus on performance, security and maintainability
React.jsNext.jsTypeScriptMUITailwind CSSExpress.jsNode.jsMongoDBSep 2021 — Feb 2022 · Kunming, Yunnan, China · onsite · Permanent
Frontend Developer @ Yunnan Leke International Travel Agency
Travel platforms shipped onsite in China while studying — both the consumer app (嗨游记 / Hi Youji) and the internal admin (Leke-Admin).
- Developed travel booking web platforms using Vue.js and Element UI
- Built a WeChat mini-program (cloud mobile app) with JavaScript and ColorUI
- Collaborated with an international team on customer-facing travel products
Vue.jsElement UIJavaScriptColorUIWeChat Mini ProgramDec 2021 — Feb 2022 · Dhaka, Bangladesh · remote · Permanent
Associate Software Engineer @ Pioneer Alpha
An R&D-based software company providing IT-enabled products and services.
- Created serverless APIs with AWS Amplify and AppSync
- Implemented authentication with Amazon Cognito and rule-based authorization with IAM
- Integrated APIs with Redux for state management on a React.js frontend
React.jsReduxAWS AmplifyAWS AppSyncAmazon CognitoGraphQLJun 2021 — Nov 2021 · Dhaka, Bangladesh · remote · Internship
Software Engineer (Intern) @ Pioneer Alpha
- Built serverless features on the AWS Amplify + AppSync stack that the Associate role later expanded
React.jsAWS AmplifyAWS AppSyncOct 2020 — Feb 2022 · Kunming, Yunnan, China · remote · Freelance
Co-founder / Full Stack Developer @ The Tech Devs
Co-founded a small studio with fellow freelancers — contract-based and monthly-retainer work for global clients, delivered by a team of 3 founders + 2 members.
- Developed web applications with React.js, Next.js and Node.js, focused on maintainable code
- Delivered custom dashboards, landing pages and SaaS solutions tailored to client requirements
- Collaborated in a distributed team setup — managing workloads, reviewing code, ensuring timely delivery
React.jsNext.jsNode.jsExpress.jsMongoDBMySQLJun 2020 — Sep 2020 · Jammu & Kashmir, India · remote · Internship
React.js Developer (Intern) @ Tawi Tech Solutions
First professional role in web development, at a startup working on ML and web projects.
- Built React.js frontends styled with Bootstrap
- Integrated Node.js + MongoDB APIs, connecting them via Axios
- Implemented email delivery with Nodemailer
- Built the company website (TTS_Website) and a React template (gp-react)
React.jsBootstrapNode.jsMongoDBAxiosNodemailer
skills
What I work with
Tools I reach for, roughly in order of how often — tiers, not percentages.
- Core
- Daily driver — can architect and lead others in it
- Strong
- Shipped production work independently
- Working
- Productive, actively deepening
- Familiar
- Have shipped with it, would need a warm-up
Learning right now
- Go — clean architecture, idiomatic service design, learning via production PRs
- Infrastructure & DevOps — deepening AWS and Docker practice beyond app deployment
- Distributed systems patterns — Kafka-based event choreography, idempotency, retries
work
Selected work
Products I've owned, shipped, and had to maintain — fintech, Web3, telecom. Mostly things involving other people's money.
Fin.com · Nov 2025 – Present
A B2B SaaS operations console for fintech operators running a live payment orchestration API.
Fin.com · Sep 2025 – Present
Golang microservice powering the payment orchestration platform — the service behind the dashboard.
River · Mar 2025 – May 2025
A three-tier eSIM reselling platform for global distribution — admin, master agent, retailer.
Wind.App — German client · Sep 2024 – Apr 2026
Verified discounts for German teachers, nurses, police and firefighters — built solo, all three layers.
Wind.App → River → Fin.com · Feb 2023 – Present
Web3 payroll and batch disbursement that feels like Web2 — started as Wind Business, now under Fin.
Wind.App · 2022 – 2024
Crypto on/off-ramp platform plus a cash-out widget for the Philippines.
Wind.App · 2022 – 2023
Self-custodial wallet mobile MVP.
Space Cats · 2023 – 2024
Law-enforcement tooling — two of five products shipped part-time.
Yunnan Leke · Sep 2021 – Mar 2022
Consumer travel app (嗨游记) and its admin back office, shipped onsite in China.
2026
Landing site and blog for Hussain Elius's memoir about building Pathao.
2026
Public site + management system for an industrial sewing-machine business in Gazipur.
2025 – 2026
E-commerce store for premium home textiles in Bangladesh, with cash on delivery.
2025 – 2026
Real-time crypto dashboard with AI market analysis, in English and Bengali.
More on GitHub.
writing
Things I've written
Articles on JavaScript, React, and interview preparation — published on Medium.
More on Medium.
recommendations
Ownership, speed, and being easy to work with
That's what colleagues and clients independently said in LinkedIn recommendations.
Arif has been an essential partner in building and maintaining our coupon website since January 2025. When we needed to urgently optimize our registration process, he jumped in and delivered a solution that helped more users sign up right away. It's rare to find someone so reliable, fast, and kind – I'd recommend him without hesitation.
Founder, ihrHelden
Arif is one of those SWEs who will make your life easier when he is on your team. He doesn't just take a solution and do what he is asked; he understands the expected outcome and comes up with solutions that make software products more robust.
Sr. Product Manager, Fin.com
I had the pleasure of working with Md Arif Hossain at River.app, where he led the Frontend team and I was managing QA. Proactive, dedicated, and always approachable… No matter how tricky the situation, Arif stayed positive and solution-focused.
Principal SQA Engineer, River
Beyond his technical expertise in JavaScript, React, Next.js, Node.js, and Nest.js, Arif also demonstrates great leadership qualities. He guides others with patience, takes initiative when projects need direction, and helps the team stay focused and motivated.
Senior Software Engineer
Arif is one of the best front-end engineers I've had the pleasure of working with. He consistently delivered quality work at incredible speed, often ahead of deadlines. Whether it's ensuring pixel-perfect responsiveness or adding those little touches that make a UI shine, Arif always goes the extra mile.
Product Lead, Field Nation
contact
Let's talk
I'm at Fin.com full-time, but I'm always up for a conversation about interesting products, side collaborations, or anything Go-shaped. Fastest response is email — I read everything: devarif.me@gmail.com.