Solutions Architect / Presales Engineer

SPTEL PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

SPTEL PTE. LTD. is seeking a senior Presales Solution Architect to lead technical discovery with sales, architect integrated transport and optical solutions, and deliver compelling POCs for large enterprise customers in Singapore.

The role requires deep OTn expertise, strong协 strong proposal and presentation skills, and collaboration with cross-functional teams to transition from presales design to deployed managed services.

Qualifications

• Presales and architecture experience within ISPs, telecoms, or MSPs.
• Deep mastery of OTNs, WDM, ROADM and related optical tech.
• Hands-on with 100G/400G/800G optics and link budgets.
• Experience with BGP-4, OSPF, MPLS, SR-MPLS/SRv6, MEF 3.0.
• Familiarity with SD-WAN, NGFW, and cloud security integrations.
• Strong proposal writing and client presentation skills.

Responsibilities

• Lead technical discovery with sales to architect integrated solutions.
• Design high-availability optical and transport topologies.
• Prepare High-Level and Low-Level Designs and BOMs.
• Lead POC demonstrations and customer presentations.
• Respond to enterprise RFPs/RFIs and bid tenders.
• Collaborate with Product, Engineering, and Service Ops.
• Translate business goals into resilient technical architecture.

Skills

Presales experience

Solution architecture

Network engineering

BGP/OSPF/MPLS

SD-WAN

Wi-Fi design

Education

Bachelor's/Diploma in Telecommunications/CS/Engineering

Tools

Cisco Meraki

Aruba

Ruckus

Fortinet

Palo Alto

SD-WAN platforms

Job description

Key Responsibilities

• End-to-End Solution Architecture: Partner with sales teams to lead technical discovery, gather requirements, and architect integrated solutions spanning core WAN, optical transport, and enterprise LAN/edge infrastructure.




• Core Transport & Optical Mastery: Design high-availability optical and transport network topologies utilizing:

  
  
  
  

  • DWDM / Optical Transport: High-capacity wavelength services, dark fibre topology, FlexGrid/ROADM optical architectures, and ultra-low latency optical pathing.

  
  

  • DCI & Metro-Ethernet: High-throughput data center interconnects, E-Line (P2P), and E-LAN (MP2MP) Layer 2 Ethernet connectivity.

  
  

  • IPVPN & Managed Internet: MPLS Layer 3 VPNs, multi-homed BGP routing, clean-pipe DDoS mitigation, and business internet delivered over SPTel’s Software-Defined Network.

  
  



• Managed Edge & Enterprise Services Expertise: Architect fully managed enterprise solutions incorporating:

  
  
  
  

  • SD-WAN: Software-defined overlay networks, dynamic path selection, multi-cloud connectivity, and centralized cloud orchestration.

  
  

  • Managed Security & Firewall: Next-Generation Firewalls (NGFW), unified threat management (UTM), zero-trust access control, and cloud security integrations.

  
  

  • Managed Enterprise Wi-Fi & Switching: High-density enterprise Wi-Fi 6/6E deployment models, cloud-managed access switches, stackable core switches, and PoE budgeting for enterprise premises.

  
  



• RFP & Technical Bidding: Lead technical response strategies for enterprise RFPs, RFIs, and tenders. Author High-Level Designs (HLD), Low-Level Designs (LLD), Bill of Materials (BOM), and detailed technical proposals.




• Customer Presentation & POCs: Present solution architecture, network diversity models, and managed service SLAs to key enterprise stakeholders (CTOs, IT Directors, Infrastructure Managers). Direct and execute Proof-of-Concept (POC) demonstrations.




• Cross-Functional Alignment: Coordinate with Product Management, Network Engineering, Implementation, and Service Operations to ensure smooth transition from presales design to post-sales deployment and managed support.

Requirements

• Bachelor's Degree or Diploma in Telecommunications, Computer Science, Electrical/Electronic Engineering, or related fields




• Minimum 4–6 years of presales, solution architecture, or network engineering experience within an ISP, Telecommunications Provider, System Integrator, or Managed Service Provider (MSP)




• Deep technical mastery of Optical Transport Networks (OTN / ITU-T G.709 standards), Wavelength Division Multiplexing (C-band/L-band), and FlexGrid/Gridless ROADM architectures




• Practical expertise in 100G/400G/800G coherent optics (ZR/ZR+), optical link budget calculations, OSNR (Optical Signal-to-Noise Ratio), dispersion management, and non-linear optical effects




• Hands-on familiarity with optical protection schemes including 1+1 OLPS (Optical Line Protection Switch), ASON/GMPLS mesh restoration, and dark fibre/spectrum path design




• Proven track record designing high-capacity, sub-millisecond low-latency DCI topologies linking major Singapore carrier-neutral and hyperscale data centers (e.g., Equinix, Global Switch, Digital Realty, Singtel DC).




• In-depth knowledge of Layer 1/Layer 2 wire-speed optical encryption protocols (MACsec, Quantum-Safe / QKD integration) for ultra-secure data transport.




• Hands-on knowledge of high-density 100G/400G client handoffs, transponder/muxponder architectures, and DCI-specific overlay/underlay integration (e.g., EVPN-VXLAN over DWDM/OTN).




• Strong foundation in BGP-4, OSPF, MPLS (L2VPN / L3VPN / VPLS), Segment Routing (SR-MPLS / SRv6), and Metro-Ethernet (MEF 3.0 CE standards)




• Architecture experience with enterprise Wi-Fi (e.g., Cisco Meraki, Aruba, Ruckus), managed switching (L2/L3 stackable switches), Next-Gen Firewalls (Fortinet, Palo Alto), and SD-WAN platforms.




• Exceptional presentation, technical proposal writing, and consultative selling skills




• Strong problem-solving capability with a track record of translating business goals into resilient technical architecture