This role is hybrid work

Senior Software Engineer (C++)

Blis is an award-winning, global leader in big data analytics and advertising. We help brands like McDonald’s, Samsung, and Mercedes-Benz reach the right audiences, ethically and responsibly. We’re champions of privacy-first, people-controlled data, with offices across four continents and our HQ in the UK.

We’re looking for experienced C++ software engineers to join our Real-Time Applications team, building high-throughput, low-latency trading and measurement systems. Our platforms handle hundreds of thousands of requests per second, powered by multi-level machine learning models, with 98th percentile latency under 20ms.

You’ll work on systems that trade across global marketplaces and process massive data volumes, as well as projects spanning proprietary location data algorithms and third-party integrations. As a tech-first product company, the work you do will be visible, meaningful, and directly impactful.

At Blis, engineers are builders and problem-solvers. You’ll help design, build, and evolve products, collaborating closely with engineers, data scientists, and product managers. We value strong design principles, lean thinking, and understanding the why behind what we build.

You’ll also be part of a supportive, collaborative team that values mentoring, pairing, and tackling ambitious challenges together.

Location: Mumbai
Shift: 12 pm - 8 pm

The Role:

• Innovate, implement, support, and iterate on our real-time application systems, infrastructure, and code

• Write and improve high-performance, highly efficient, and highly maintainable C++

• Ensure our designs and systems are highly available, resilient, and secure

• Support and mentor other members of the team

• Commitment to Blis' Inclusion initiatives & 5 step sustainability plan

Required Knowledge:

• C++, including Boost

• Networking topics from asynchronous connection handling to TCP/IP parameters

• Concurrency

• RESTful APIs and web-serving concepts

• Big Data structures and high-frequency data processing algorithms at scale

• Relational and non-relational databases and concepts

• Server-side Linux use and administration

• Cloud infrastructure concepts and utilisation

• Engineering design principles and when to go fast and when to go slow

Desired Knowledge:

• DevOps topics including CI/CD, Jenkins, Docker, Kubernetes, Prometheus & Grafana

• Machine learning algorithms and how to implement them

• Prior work with algorithmic trading systems

• Understanding of compiler output (assembly)

Expected Background:

• +7 years experience as a systems engineer or architect for complex, high-performance systems

• Degree in Computer Science, Software Engineering, or similar

Key Technologies We Use (not necessarily required for the role):

Google Cloud, Google Cloud Composer, BigQuery, Spark, Solr, Elasticsearch, Druid, PostgreSQL, ScyllaDB, Redis, Kafka, Flink, Docker, Kubernetes, Kibana, Jenkins, Prometheus, Grafana, Github, C++, Python, Scala, Compiler Explorer

What Blis Can Offer:

We want you to be well and thrive and we care about your growth as a person and in your career. Our benefits include:

• Comprehensive private healthcare

• Matched pension scheme

• Paid time off and one extra day off for your birthday

• Enhanced paternity and maternity leave

• Career coaching and development paths

• Hybrid working… and more!

We are an equal opportunity employer and strongly believe that diversity makes us a better company.

Role Title Synonyms: C++ Engineer, C++ Developer, C++ Systems Engineer

About us

Blis is the geo-powered advertising tech stack. We’ve built a radically different omnichannel advertising solution structured on geography, not identity. Audience Explorer is our powerful audience planning platform delivering actionable intelligence & insight to advertisers.

With Blis, advertisers can plan unified audiences with data from premium partners, connected by geo. Buy audiences using smart cookie less technology that can double performance and halve costs. Measure the audience, not just the channel, with patent-pending omnichannel measurement technology.

Established in the UK in 2004, Blis now operates in more than 40 offices across five continents. Working with the world’s largest and most successful companies, as well as every major media agency.

As an equal opportunity employer, we treat all our employees and job applicants fairly and equally. We oppose all forms of unlawful and unfair discrimination and take all reasonable steps to create a work environment in which all employees are treated with respect and dignity. We don't condone or tolerate any form of harassment, by employees or by others who do business with us.

Our values

Brave

We're leaders not followers

An innovation and growth mindset helps us solve everyday challenges and achieve breakthroughs. Our passion drives
us to innovate. We don’t see barriers, just possibilities.
We take ownership and hold ourselves accountable for outcomes, good and bad – and we don’t pass the buck.

Love our clients

We're client obsessed

We do what we say and build trusted relationships with our partners for the long term. We act with integrity. We put our clients at the centre of our business. We obsess over the best insights, ideas and solutions to deliver WOW and work with honesty and accountability to get it done.

Inclusive

We're one team

We are empathetic and embrace diversity. Everyone has
a voice and can bring their authentic self to work. We care
about and support each other – with humility and good
humour. Mutual respect and wellbeing are key. We strive
to eliminate bias and be open and transparent.

Solutions driven

We're action oriented

Speed matters in business, so we're solution-driven and
action-oriented. We value simplification and calculated risk taking. We are lean, agile and resourceful self-starters.
We collaborate and break silos, working thoughtfully and
with urgency to solve problems, while learning from mistakes
and celebrating wins.