Email Deliverability Engineer

Proximus Global, combining the strengths of Telesign, BICS, and Route Mobile, is transforming the future of communications and digital identity. Together, our solutions fuel innovation across the world’s largest companies and emerging brands. Our unrivaled global reach empowers businesses to create engaging experiences with built-in fraud protection across the entire customer lifecycle.

Our comprehensive suite of solutions - from our super network for voice, messaging, and data, to 5G and IoT; and from verification and intelligence to CPaaS for personalized omnichannel engagement - enables businesses and communities to thrive. Reaching over 5 billion subscribers, securing more than 180 billion transactions annually, and connecting 1,000+ destinations, we honor our commitment to connect, protect and engage everyone, everywhere.

Key Highlights

• Powering over 13 billion digital communications each month.

• Supporting 3,500+ active customers - including enterprises, OTTs, and mobile operators - through a presence in 50+ global offices across 100+ countries.

• Managing 50% of the world’s roaming data traffic and connecting 150 million IoT devices.

• Driving innovation in 5G, private networks, and IoT enablement, positioning Proximus Global as a leader in next-generation communication technologies.

• Committed to a unified vision, Proximus Global is unlocking new opportunities and enabling seamless global communications for businesses worldwide.

SendClean

An Email Platform by Route Mobile Limited

• Proximus Group

Email Deliverability Engineer

Location Hyderabad, India (on-site)

Function Email Deliverability & Platform Operations

Experience 4-7 years in email deliverability / MTA operations

Type Full-time

About the role

Route Mobile Limited is a publicly listed Cloud Communications (CPaaS) provider, in the business since

2004, serving enterprises, OTT players and mobile operators across BFSI, retail, travel and e-commerce.

SendClean is our high-volume email platform.

SendClean is Route Mobile’s high-volume email platform. We push billions of transactional and

marketing emails a month for banks, fintechs, retail and OTT customers across India, LATAM, the

Middle East and now the US market. At that scale, deliverability is not a marketing checkbox - it is an

engineering problem. Every point of inbox placement we lose is revenue our customers lose.

We are looking for a Deliverability Engineer who can live in both worlds: someone who understands

sender reputation, ISP policy and authentication as deeply as any deliverability consultant, but who is

also comfortable on a Linux box at 2 AM reading MTA logs to find out why a sending IP suddenly started

getting 421s from Google. If you can read a bounce log, tell the difference between a real block and a

transient defer, and explain to a customer why their list quality is killing their reputation - in the same

afternoon - you are the person we want.

This is a hands-on role. You will own inbox placement for a large book of enterprise senders, work

directly with the SRE and platform teams on the sending infrastructure, and be the person the delivery

team escalates to when something is genuinely on fire.

What you’ll actually do

- Own deliverability end-to-end. Own inbox placement and sender reputation across our sending IP

pools and domains - monitor it, defend it, and recover it when it drops.

- Debug on the server. Read the logs. Dig through MTA logs (receiving and sending nodes), SMTP

transaction logs and bounce data to root-cause why mail is deferring, bouncing or landing in spam.

You should be able to tell a 4xx defer from a 5xx block and know what to do about each.

- Warm-up & IP hygiene. Manage IP warm-up schedules for new ranges and new customers, and

know when to slow a sender down before they burn a range.

- Authentication. Set up and read SPF, DKIM, DMARC (and BIMI where it applies). Diagnose

alignment failures and fix authentication issues for customers who bring their own domains.

- ISP & mailbox provider policy. Stay ahead of Gmail, Yahoo and Microsoft sender requirements

and enforcement changes, and translate them into concrete actions before they hit our customers -

not after.

- Blocklist monitoring & remediation. Watch Spamhaus, SURBL, Barracuda and the other

blocklists. When we get listed, you find out why, fix the root cause, and drive the delisting.

- Bounce & complaint handling. Classify and act on bounces and FBL/complaint feedback, keep

suppression clean, and use complaint and bounce signatures to catch list-quality and spamtrap

problems early.

- Metrics & reporting. Build and read dashboards (Kibana / Grafana or similar) for delivery, bounce

and latency metrics. Turn raw delivery data into something a customer or an account manager can

act on.

- Customer-facing deliverability. Work directly with customers on their sending practices - list

hygiene, content, cadence, authentication - and hold the line on our compliance and anti-abuse

standards.

- Cross-team work. Partner with SRE, platform and support engineering on MTA config, queue

behaviour and infrastructure changes that affect delivery. Deliverability doesn’t happen in isolation

from the platform.

- Audits & compliance. Run regular audits of our sending infrastructure and practices against

industry standards and mailbox-provider requirements, and keep us compliant with anti-spam

regulation (CAN-SPAM, GDPR, CASL and the rest).

- Vendor & postmaster relationships. Own the external relationships that decide our fate - blocklist

operators, feedback-loop and seed-list / inbox-placement providers, and mailbox-provider

postmaster channels - to troubleshoot issues and push delistings through.

- Documentation. Keep deliverability SOPs, runbooks and playbooks current so the delivery and

support teams can handle the routine cases without escalating every time.

- Mentoring & training. Coach the delivery and support teams on deliverability fundamentals - turn

tribal knowledge into something the whole team can actually use.

- Tooling & continuous improvement. Evaluate new deliverability, monitoring and inbox-placement

tooling, and make the call on what’s worth adopting - we’re actively investing in better tooling, not

standing still.

What we’re looki ng for

- Real email-industry exposure. 4+ years working hands-on in email deliverability, ideally at an ESP,

CPaaS or a serious high-volume sender - not just campaign-side marketing.

- You understand SMTP properly. Solid working knowledge of SMTP: response codes, bounce

codes, deferrals, connection behaviour, and what mailbox providers do and don’t tell you.

- Server-level comfort. Comfortable on Linux. You can SSH into a box, grep through logs, follow a

message through the pipeline, and use basic scripting (bash / Python) to pull the answer out of a

large log file.

- Authentication in your bones. Hands-on with SPF, DKIM, DMARC, DNS records, and comfortable

diagnosing them when they break.

- You know the ecosystem. You know Postmaster Tools, SNDS, feedback loops, blocklists and the

reputation systems that actually decide inbox placement.

- Analytical and evidence-driven. When mail is going to spam, you form a hypothesis, test it against

the data, and fix the actual cause instead of guessing.

- Clear communicator. You can explain a deliverability problem to a customer, an account manager

and an engineer - three different audiences - and influence stakeholders at every level without

losing any of them.

Nice to have (not deal-breakers)

- Hands-on experience with MTA -Postfix, PowerMTA or similar.

- Familiarity with Elasticsearch / Kibana or another log-analytics stack for delivery monitoring.

- Exposure to AWS (or another cloud) and how sending infrastructure runs on it.

- Working knowledge of Redis, message queues (RabbitMQ ) or the moving parts of a sending

pipeline.

- HTML email and rendering know-how - enough to spot when the content is the problem.

- Prior time in a deliverability lead or expert role - if you’ve owned this for an organisation before, that

counts.

- A bachelor’s in marketing, CS/IT or a related field - or equivalent real-world experience.

Why PXS Global?

• Global & Inclusive - Work with diverse teams across 100+ countries, embracing a truly international culture.

• Growth-Focused - Develop your career through tailored learning, leadership programmes, and internal mobility.

• Innovation-Driven - Contribute to cutting-edge projects in 5G, IoT, and next-gen communication technologies.

• Flexible Workstyle - Enjoy hybrid working with the option to work remotely and even from abroad for up to 10 days a year.

• Efficient & Scalable - Be part of a company that values simplicity, operational excellence, and smart growth.

• Comprehensive Benefits - Enjoy a competitive and thoughtfully designed salary package, with a wide range of benefits.

A bachelor’s in marketing, CS/IT or a related field - or equivalent real-world experience.