CSG Technosol Pvt Ltd

Senior Developer
Tech Lead — Swipeo, Crypto Card Platform
Location: Noida, India (On-site) Type: Full-time Product: swipeo.io
The Short Version
Crypto in your wallet. Coffee in your hand. Nothing in between.
That's Swipeo (swipeo.io) — a live, Visa-powered prepaid card platform. Users top up with BTC, ETH, USDT, USDC or fiat; get a virtual card the moment they sign up (or a premium metal physical); add it to Apple Pay or Google Pay; and spend at 100M+ merchants worldwide. Conversion happens their way — auto-convert at the moment of payment, or hold crypto and convert when the rate is right. Freeze, rotate numbers, set per-merchant limits, spin up single-use cards — all in real time.
The product is built and in users' hands. Now we need the engineer who takes it from launched to unmissable — owning the architecture, scaling the engine, and leading the team through our next phase of growth. This isn't a zero-to-one build. It's the harder, more interesting part: one to one hundred.
The Stack You'll Inherit
Go on the backend, React on the web, Flutter for iOS and Android. Modern, clean, and shipping — no decade-old monolith lurking in the basement. You'll set the technical direction across all three.
What You'll Actually Do
<ul>
<li>Own the platform architecture. Take charge of Swipeo's Go services, React web app, and Flutter mobile apps — evolve the architecture, pay down the right debt, and make the calls on what we build versus buy as we scale.</li>
<li>Scale the spend engine — our crown jewel. Just-in-time funding: a card authorization arrives, we check the balance, lock a rate, convert, and approve — in sub-second latency. You'll harden this path for 10x the volume: latency budgets, failure modes, rate-lock logic, and graceful degradation (because a declined coffee is a lost customer).</li>
<li>Deepen the wallet &amp; custody layer. Per-user deposit addresses with real-time confirmation tracking are live — you'll expand chain and asset coverage, tighten hot/cold segregation, and level up our institutional custody / MPC integrations (Fireblocks, BitGo, or equivalent).</li>
<li>Extend the card experience. Instant freeze, number rotation, per-merchant and per-day limits, single-use virtuals, and push notifications on every authorization are in production. You'll drive the roadmap beyond them — deeper issuer-processor integrations, new markets, new card capabilities.</li>
<li>Make compliance a superpower. Tiered KYC, AML transaction monitoring, sanctions screening, Travel Rule, and PCI DSS — strengthened as we grow into new jurisdictions, built into the platform rather than bolted on after the audit.</li>
<li>Run treasury &amp; reconciliation. Stablecoin and fiat float, exchange/OTC liquidity for conversions, transparent FX with no hidden markup, and penny-perfect reconciliation across on-chain ledgers, internal balances, and card network settlement files.</li>
<li>Lead the crew. Grow and mentor the engineering team, set the security and code-review culture, and be the technical voice in the room with custody partners, card networks, and regulators.</li>
</ul>
What You Bring
The non-negotiables:
<ul>
<li>Deep, hands-on crypto expertise — wallet architecture, private key management, multi-chain integrations, stablecoins (USDT/USDC), transaction finality, and the operational realities of moving digital assets safely at scale.</li>
<li>Experience scaling a live crypto payments, crypto card, or exchange-grade platform — you've owned a production system where user funds lived on-chain and got spent in the real world, and you've grown it without breaking it.</li>
<li>Strong Go expertise for backend services, plus enough working fluency in React and Flutter to lead, review, and unblock a full-stack team.</li>
<li>Card-side fluency: issuer-processor integrations, real-time authorization flows (ISO 8583 or modern processor APIs), and just-in-time funding models.</li>
<li>8+ years in software engineering, with 3+ years leading teams on fintech, crypto, or payments systems.</li>
<li>A security-first reflex — threat modeling, key ceremony discipline, and the healthy paranoia of someone who knows what's at stake when the assets are bearer instruments.</li>
<li>Working knowledge of crypto regulation across our markets — VARA (Dubai), FCA (UK), MiCA (EU), and FATF Travel Rule requirements.</li>
</ul>
Bonus points for:
<ul>
<li>Direct integration experience with Fireblocks, BitGo, Copper, or similar MPC custody platforms</li>
<li>Building FX/pricing engines, liquidity routing, or exchange connectivity (CEX APIs, OTC desks)</li>
<li>Smart contract development or on-chain settlement experience (EVM/Solidity)</li>
<li>Adjacent product surfaces: rewards, P2P transfers, swaps, or crypto-backed lending</li>
<li>Taking a crypto product through security audits, penetration tests, or licensing processes</li>
</ul>
Why This Role Is Different
<ul>
<li>Real product, real users, week one. You'll ship to production in your first week — not spend six months drawing boxes on a whiteboard.</li>
<li>A modern stack without the legacy tax. Go, React, Flutter — the codebase is young enough to steer and mature enough to matter.</li>
<li>Global from Noida. Your infrastructure settles transactions for users across the UAE, UK, and worldwide.</li>
<li>Crypto that ships. Not a whitepaper, not a testnet demo — a card in someone's hand, working at a checkout counter, today.</li>
</ul>
How to Apply
First, go play with the product: swipeo.io. Then send us your CV plus a short note on two things — the crypto or payments platform you've scaled (the architecture calls you made and the one you'd remake), and one thing about Swipeo you'd improve in your first quarter. If you've ever debugged a stuck transaction at 3 a.m. while a settlement window closed, we especially want to hear from you.
send your cv at <a href="mailto:hrd@csgtech.in" rel="nofollow noopener" target="_blank">hrd@csgtech.in</a>
Pay: ₹700,000.00 - ₹1,500,000.00 per year
Work Location: In person

Senior Developer/ Tech Lead — Swipeo, Crypto Card Platform

Senior Developer/ Tech Lead — Swipeo, Crypto Card Platform

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