Senior Developer/ Tech Lead — Swipeo, Crypto Card Platform

As a Senior Developer and Tech Lead at CSG Technosol, you own the technical direction and architecture of Swipeo, a live, Visa-powered crypto card platform. The product is in users' hands across the UAE, UK, and globally - now you take it from launched to unmissable, scaling the spend engine, deepening custody integrations, and leading the engineering team through the next phase of growth.

What you'll do

• Own the platform architecture across Swipeo's Go services, React web app, and Flutter mobile apps. Evolve the architecture, pay down technical debt, and make the calls on what to build versus buy as you scale.
• Scale the spend engine for 10x volume: a card authorization arrives, you check the balance, lock a rate, convert, and approve in sub-second latency. Harden this path for failure modes, rate-lock logic, and graceful degradation.
• Deepen the wallet and custody layer. Expand chain and asset coverage beyond the live per-user deposit addresses with real-time confirmation tracking, tighten hot/cold segregation, and level up institutional custody and MPC integrations such as Fireblocks or BitGo.
• Extend the card experience beyond instant freeze, number rotation, per-merchant and per-day limits, single-use virtuals, and push notifications. Drive the roadmap deeper into issuer-processor integrations, new markets, and new card capabilities.
• Make compliance a superpower: tiered KYC, AML transaction monitoring, sanctions screening, Travel Rule, and PCI DSS strengthened as you grow into new jurisdictions, built into the platform rather than bolted on after audit.
• Run treasury and reconciliation: manage stablecoin and fiat float, exchange and 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.
• 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.

What you bring

• Deep, hands-on crypto expertise in wallet architecture, private key management, multi-chain integrations, stablecoins (USDT/USDC), transaction finality, and the operational realities of moving digital assets safely at scale.
• Proven experience scaling a live crypto payments, crypto card, or exchange-grade platform where user funds lived on-chain and got spent in the real world, grown without breaking it.
• Strong Go expertise for backend services, plus working fluency in React and Flutter to lead, review, and unblock a full-stack team.
• Card-side fluency: issuer-processor integrations, real-time authorization flows (ISO 8583 or modern processor APIs), and just-in-time funding models.
• 8+ years in software engineering, with 3+ years leading teams on fintech, crypto, or payments systems.
• A security-first reflex: threat modeling, key ceremony discipline, and the healthy paranoia of someone who knows what is at stake when the assets are bearer instruments.
• Working knowledge of crypto regulation across the markets you serve: VARA (Dubai), FCA (UK), MiCA (EU), and FATF Travel Rule requirements.

Nice to have

• Direct integration experience with Fireblocks, BitGo, Copper, or similar MPC custody platforms.
• Building FX/pricing engines, liquidity routing, or exchange connectivity (CEX APIs, OTC desks).
• Smart contract development or on-chain settlement experience (EVM/Solidity).
• Product experience with rewards, P2P transfers, swaps, or crypto-backed lending.
• Taking a crypto product through security audits, penetration tests, or licensing processes.

What we offer

• On-site role in Noida, India.
• Full-time position.

About CSG Technosol

CSG Technosol builds Swipeo, a live, Visa-powered prepaid card platform where users top up with BTC, ETH, USDT, USDC or fiat, receive a virtual card instantly, add it to Apple Pay or Google Pay, and spend at 100M+ merchants worldwide with real-time conversion control and card management.